Brackish water(BW)irrigation may cause soil quality deterioration and thereby a decrease in crop yields.Here we examined the impacts of applying gasification filter cake(GFC),intercropping with Portulaca oleracea(PO),...Brackish water(BW)irrigation may cause soil quality deterioration and thereby a decrease in crop yields.Here we examined the impacts of applying gasification filter cake(GFC),intercropping with Portulaca oleracea(PO),and their combination on soil quality,nutrient uptake by plants and tomato yields under BW irrigation.The treatments evaluated included(i)freshwater irrigation(Control),(ii)BW irrigation,(iii)GFC application under BW irrigation(BW+GFC),(iv)intercropping with PO under BW irrigation(BW+PO),and(v)the combined application of GFC and PO under BW irrigation(BW+PO+GFC).Overall,the use of BW for irrigation resulted in a decline in both soil quality(assessed by a soil quality index(SQI)integrating a wide range of key soil properties including salinity,nutrient availability and microbial activities)and crop yields.Nevertheless,when subjected to BW irrigation,the application of GFC successfully prevented soil salinity.Additionally,the intercropping of PO decreased the soil sodium adsorption ratio and improved the absorption of nutrients by plants.As a result,the BW+GFC+PO treatment generally showed higher tomato yield as compared to other BW-related treatments(i.e.BW,BW+GFC and BW+PO).Compared to BW,the BW+GFC+PO treatment had an average increase of 24.7% in the total fruit yield of four Cropping Seasons.Furthermore,the BW+GFC+PO treatment consistently exhibited the highest fruit quality index(FQI).Taken together,the combined application of GFC and PO is effective in promoting soil quality and crop yields under BW irrigation.展开更多
Salinity stress is amajor constraint on agricultural productivity,particularly in arid and semi-arid regions.This study evaluated the potential of Ascophyllum nodosum extract(ANE)in mitigating salinity-induced stress ...Salinity stress is amajor constraint on agricultural productivity,particularly in arid and semi-arid regions.This study evaluated the potential of Ascophyllum nodosum extract(ANE)in mitigating salinity-induced stress and enhancing the growth and physiological performance of Portulaca oleracea L.under NaCl concentrations of 0,50,70,and 100 mM for 50 days.A two-way ANOVA assessed the effects of NaCl concentration,ANE treatment,and their interaction.The results showed that ANE significantly increased plant height at 50 mMNaCl(p=0.0011)but had no effect at higher salinity levels(p>0.05).Shoot dry weight was significantly influenced by the interaction of NaCl and ANE(p=0.0064),with ANE increasing biomass at 0 mM but decreasing it at 100 mM NaCl.However,ANE did not significantly affect root dry weight(p>0.05).Physiological responses indicated a significant increase in proline content at 50mMNaCl(p=0.0011),supporting improved osmotic adjustment.Total soluble protein was significantly enhanced at all salinity levels except 100 mM NaCl(p<0.01).Regarding ionic regulation,ANE had no significant effect on leaf sap pH(p>0.05)but increased electrical conductivity(EC)at 70 and 100 mM NaCl(p<0.01),suggesting a role in ion homeostasis under high salinity.Photosynthetic pigments responded positively to ANE,with significant increases in chlorophyll“a”(p<0.0001)and carotenoid content(p<0.0001),while chlorophyll“b”remained unchanged(p>0.05).These findings highlight ANE’s potential as a sustainable biostimulant for improving salinity tolerance,particularly at moderate NaCl levels.Future research should focus on molecular mechanisms and long-term field applications to optimize ANE’s role in enhancing soil and crop productivity under salinity stress.展开更多
Portulaca oleracea L. is distributed widely in China and some othercountries, which is included in the pharmacopoeias of China. In tradition, it is used in thetreatment of atheroma, and also used as antifungal and ant...Portulaca oleracea L. is distributed widely in China and some othercountries, which is included in the pharmacopoeias of China. In tradition, it is used in thetreatment of atheroma, and also used as antifungal and antiviral agents now. It also decreases bloodsugar, enhances immunity and adjusts blood lipids. The anticancer and antifungal effects ofPortulaca oleracea L. were reported in several patents. But no active component has been found. Inthis study, the chemical compositions from Portulaca oleracea L. were investigated to provideevidence for the activity of Portulaca oleracea L. .展开更多
[Objective] The experiment studied on insecticidal and antifeedant action of on Portulaca oleracea L.to provide theoretical basis for developing a new botanical insecticide by taking Portulaca oleracea L.as a raw mate...[Objective] The experiment studied on insecticidal and antifeedant action of on Portulaca oleracea L.to provide theoretical basis for developing a new botanical insecticide by taking Portulaca oleracea L.as a raw material.[Method] The insecticidal activities of the ethanol extracts and 5 kinds of extracts with petroleum ether,chloroform,ethyl acetate,n-butanol,water from Portulaca oleracea L..against Aphis sp.was studied;Leaves are using drug treatments of 5 extracts anti-feedant activity of Aphis sp.[Result] The results showed that 95% ethanol extract displayed high contact activity to Aphis sp.The corrected mortality after 48 h reached 95.4 % under the concentration of 50.00 mg·ml-1 and the insecticidal activities of 5 extracts against Aphis sp.was in the order that petroleum ether > chloroform > n-butanol > ethyl acetate >water.Five kinds of anti-feeding activity in the extract of the order for the water> ethyl acetate> n-butanol > chloroform >petroleum ether.[Conclusion] The extract from Portulaca oleracea L.has a strong contact toxicity of pesticide active on Aphis sp.substances and for a small polar compounds,the strong anti-feeding activity is a kind of larger polar compounds.展开更多
In the present study, we aimed to intensively study the chemical constituents, especially organic acids from a medicinal plant Portulaca oleracea L., and screen their anti-inflammatory and quinone reductase （QR, a ph...In the present study, we aimed to intensively study the chemical constituents, especially organic acids from a medicinal plant Portulaca oleracea L., and screen their anti-inflammatory and quinone reductase （QR, a phase II detoxyfication enzyme） inductive activity. A total of 20 compounds were isolated and identified based on spectroscopic methods, as succinic acid （1）, mono-methyl succinate （2）, L-malic acid （3）, L-l-methyl malate （4）, L-4-methyl malate （5）, L-dimethyl malate （6）, L-6-ethyl citrate （7）, L-1-methyl citrate （8）, L-1,5-dimethyl citrate （9）, 4-hydroxy-5-methylfuran-3-carboxylic acid （10）, 5-hydroxymethyl-furoic acid （11）, stearic acid （12）, L-pyroglutamic acid （13）, cyclo-（tyrosine-leucine） （14）, L-isoleucine （15）, （-）-dehydrovomifoliol （16）, （-）-epiloliolide （17）, 3,4-dihydroxyphenylethanol （18）, succinimide （19）, and uracil （20）. Among them, 14 compounds （2, 4-8, 10, 11, 13-18） were isolated from P. oleracea for the first time. Compotmd 18 （12.5 μM） exhibited potent anti-inflammatory effect in lipopolysaccharide （LPS）-induced macrophage cells （RAW264.7） by reducing NO production, and it also increased QR activity in Hepa lclc7 cells. Compound 16 （50 μM） showed weak QR inductive activity. None of other compounds showed anti-inflammatory or QR inductive activities.展开更多
Objective: To study the effects of Portulaca oler acea, a Chinese medicinal herb, on insulin resistance in rats with type 2 diabet es mellitus (T2DM). Methods: Experimental model of T2DM was established by injection o...Objective: To study the effects of Portulaca oler acea, a Chinese medicinal herb, on insulin resistance in rats with type 2 diabet es mellitus (T2DM). Methods: Experimental model of T2DM was established by injection of streptozotocin (25mg/kg) and feeding with high calorie forage. The effects o f Portulaca oleracea on oral glucose tolerance, serum levels of insulin, triglyc eride, total cholesterol, high density lipoproteins cholesterol and free f atty acids, and insulin sensitivity index were all observed. Results: Portulaca oleracea could reduce the body weight, improve the impaired glucose tolerance and lipid metabolism, decrease serum free fatty acids, attenuate hyperinsulinemia and elevate insulin sensitivity. Conclusion: Portulaca oleracea could improve insulin resistance i n rats with T2DM, and the mechanism might be related to its actions in improving lipid metabolism and decreasing free fatty acids.展开更多
With Portulaca oleracea L. as an experimental material, its total DNA was extracted by the improved CTAB method, the ISSR-PCR primers were screened, and the ISSR-PCR reaction system and reaction conditions for P. oler...With Portulaca oleracea L. as an experimental material, its total DNA was extracted by the improved CTAB method, the ISSR-PCR primers were screened, and the ISSR-PCR reaction system and reaction conditions for P. oleracea were Optimized. The results showed that there were 8 primers suitable for ISSR-PCR of P. oleracea. The optimal reaction system had a volume of 25 μl, including 2 x Taq Platinum PCR Master Mix 12.5 μl, primer 2 μl, ddH20 9.5 μl, and DNA template 1μl. The optimized ISSR-PCR of P. oleracea was started with pre-denaturation at 94 ℃ for 360 s, followed by 30 cycles of denaturation at 94 ℃ for 60 s, annealing at 54 ℃ for 60 s and extension at 72 ℃ for 90 s, and completed by extension at 72 ℃ for 300 s.展开更多
To improve understanding of Portulaca pilosa seed germination and lay technical foundation for seedling cultivation,this paper studies the characteristics of dormancy and germination of Portulaca pilosa seed. Research...To improve understanding of Portulaca pilosa seed germination and lay technical foundation for seedling cultivation,this paper studies the characteristics of dormancy and germination of Portulaca pilosa seed. Research indicates that its primary seed dormancy period is about25 d,dormancy can be completely released by storage at room temperature for 30 d; the seed is positively photoblastic seed that can't sprout and can be induced into dormancy in low light conditions; the dormancy-released seed is more sensitive to light when compared with the freshly picked seed,and the germination peak arises 1 d earlier; Portulaca pilosa seed favorites humid conditions,and the higher the soil moisture,the higher the germination rate and germination energy of the seed. The dormancy-released seeds should be used for Portulaca pilosa seedling cultivation,and after the germination is accelerated for 2- 3 d in the light conditions,the seeds are sown on the soil surface,and covered with transparent plastic film to keep moisture and light,which is conducive to the emergence of seeds.展开更多
Portulaca oleracea leaves are tested as an agriculture adsorbent material for reducing Pb(II) from aqueous solutions. The pH of solution, adsorbent dose, shaking speed and particles size of adsorbent were constants at...Portulaca oleracea leaves are tested as an agriculture adsorbent material for reducing Pb(II) from aqueous solutions. The pH of solution, adsorbent dose, shaking speed and particles size of adsorbent were constants at all adsorption experiments. Effects of contact time on adsorption capacity of Pb(II) onto Portulaca oleracea leaves were studied. The adsorption capacity increased as the contact time increased and reached equilibrium at one hour. Kinetic models including a first-order, pseudo-second-order and intra-particle diffusion equations were selected to follow the adsorption process. The process follows a pseudo-second-order kinetic and the intra-particle diffusion is the main step to interpret the mechanism of adsorption. Langmuir, Freundlich and Dubinin-Radush Kevich (D-R) isotherm models were applied to describe adsorption equilibrium data. Results proved that the Langmuir isotherm model gave an acceptable fit to the experimental data more than Freundlich isotherm model. Maximum adsorption capacities obtained were 192.3, 333.3 and 434 mg/g at 295, 303 and 310 K, respectively. According to D-R isotherm data, the adsorption process is classified as physical adsorption. Thermodynamically, the adsorption process is non spontaneous, endothermic and random in nature.展开更多
OBJECTIVE: To find scientific reasons for adverse events reported in Traditional Iranian Medicine (TIM) following administration of aqueous extract of Herba Portulacae Oleraceae seed including itching and tingling of ...OBJECTIVE: To find scientific reasons for adverse events reported in Traditional Iranian Medicine (TIM) following administration of aqueous extract of Herba Portulacae Oleraceae seed including itching and tingling of whole body, tachycardia, anxiety, dyspnea and severe nausea. METHODS: Electronic databases including PubMed, Scopus, and Web of Science were searched up to April 2013 to find papers focused on phytochemistry and biological activities of this plant. RESULTS: Among chemical constituents present in Herba Portulacae oleraceae, catecholamines, adenosine and niacin can cause adverse events similar to those reported inTIM. CONCLUSION: Because of the short duration of action of adenosine, catecholamines and niacin seems to be the major role in appearance of ad-verse events reported in TIM for Herba Portulacae Oleraceae seed. Mechanisms with consideration of receptor types and pharmacokinetics of catecholamine and niacin are warranted to confirm this hypothesis.展开更多
The aim of this study was to investigate the antihyperglycemic and antioxidant effects of Po （Portulaca oleracea） lyophilised aqueous extract in diabetic male Wistar rats. Diabetes was induced intraperitonially by a...The aim of this study was to investigate the antihyperglycemic and antioxidant effects of Po （Portulaca oleracea） lyophilised aqueous extract in diabetic male Wistar rats. Diabetes was induced intraperitonially by a single injection of STZ （streptozotocin） （60 mg/kg bw （body weight））. Twenty diabetic rats, weighing 263 ± 5 g, were divided into two groups fed a casein diet supplemented or not with Po extract （1 g/kg bw）, for four weeks. Control group （n = 6） received 0.23-0.25 mL of citrate buffer and was fed a standard diet during the experiment. The study was carried out at Oran University, Algeria and the entire experiments lasted from September 2011 to July 2012. Blood was obtained from the abdominal aorta of rats after fasting overnight and standard methods were used for the extraction of spices, determination of glycemia, insulinemia, lipid peroxidation and antioxidant enzymes activities. Portulaca oleracea treated compared to untreated rats, glycemia and HbAIc values were respectively 2.8- and 1.7-fold lower. TBARS （thiobarbituric acid reactive substances） concentrations were reduced in RBC （red blood cells） （-54%） and plasma （-65%）. Moreover, in liver and kidney, TBARS values were respectively 1.8- and 2-fold lower. SOD （superoxide dismutase） and GSH-Px （glutathione peroxidase） activities were increased respectively by ＋38% and ＋85%, in liver. GSSG-Red （glutathione reductase） activity was 1.9-fold higher in kidney, while CAT （catalase） was improved in kidney （＋48%）. In RBCs, SOD, GSH-Px, GSSH-Red and CAT activities were increased by 31%, 42%, 56% and ＋50%, respectively. These data have cast a new light on the actions of Portulaca oleracea and its antioxidant potential benefits in preventing diabetes and its complications.展开更多
Portulaca oleracea(P.oleracea)is a traditional Chinese herbal that has the effects of soothing the liver and clearing collaterals,strengthening the spleen and stomach,moistening the intestines and detoxifying.With the...Portulaca oleracea(P.oleracea)is a traditional Chinese herbal that has the effects of soothing the liver and clearing collaterals,strengthening the spleen and stomach,moistening the intestines and detoxifying.With the development of the pharmaceutical industry,the medicinal value of P.oleracea is becoming increasingly prominent.It is commonly used in clinical practice for clearing heat and detoxifying,inhibiting bacteria,preventing and treating diseases such as hypertension,coronary heart disease,and cerebral infarction,indicating its broad application prospects.This study reviews the chemical components and pharmacological activities of P.oleracea in recent decades.展开更多
The contamination of soils with heavy metals(HMs)and their accumulation in local plants has become an increasing issue because of industrial activities.This study investigated the extent of HMs contamination in soils ...The contamination of soils with heavy metals(HMs)and their accumulation in local plants has become an increasing issue because of industrial activities.This study investigated the extent of HMs contamination in soils and Purslane(Portulaca oleracea)in the Bassa Industrial Zone,Douala-Cameroon,focusing on the implications for environmental health and ecosystem sustainability.We collected 17 surface soil samples and 4 composite purslane leaf samples from different sampling locations in the industrial site.The HMs(Cd,Pb,As,Cr,Cu and Ni)were analyzed with an Inductively Coupled Plasma-Optical Emission Spectroscopy(ICP-OES).The results revealed that,the HM concentrations(except for Cd and Ni)in most locations exceeded the Soil Quality Guidelines for industrial land use.The Pollution Load Index confirmed the presence of heavy metal pollution in all the sample locations.Potential Ecological Risk In dex highlighted varying levels of risk across locations,presenting moderate,high,and significantly high ecological risk.The primary contributors to eco-logical risk were Pb,Cd,and Cu.Furthermore,the geo-accumulation index revealed heavily to extremely high contamination in several locations.Princi pal Component Analysis suggested that Cd,As,Cr,Cu,and Ni likely originated from common sources,while Pb had a distinct source,all due to anthropogenic activities.Additionally,Cr concentrations in purslane leaves exceeded the nor-mal range,with one location recording a value(5.41 mg kg^(-1))which was within the maximum toxicity threshold for plants.These findings underline the need for remedial measures to mitigate the adverse effects of heavy metal contami nation in the Bassa Industrial Zone.展开更多
Background:Portulaca oleracea L.,a traditional medicine with bioactive compounds like flavonoids and omega-3 fatty acids,has gained interest in its neuroendocrine and toxicological effects.Objectives:The aim of this r...Background:Portulaca oleracea L.,a traditional medicine with bioactive compounds like flavonoids and omega-3 fatty acids,has gained interest in its neuroendocrine and toxicological effects.Objectives:The aim of this review is to provide a comprehensive summary of the current knowledge on the neuroendocrine and toxicological activities of Portulaca oleracea.This review also highlights the potential mechanisms of action of these activities.Methods:A literature search was conducted using various databases such as PubMed,ScienceDirect,and Google Scholar.Keywords such as’Portulaca oleracea’,’purslane’,’neuroendocrine activity’,and’toxicological activity’were used to identify relevant articles.Only studies published in English were included in this review.Results:Portulaca oleracea has been found to improve testicular and cognitive function as well as memory in animal models of Alzheimer’s disease and cerebral ischemia due to its antioxidant,anti-inflammatory properties,anti-anxiety and anti-depressant effects.On the other hand,Portulaca oleracea has also been reported to possess toxicological activities.Studies have shown that high doses of Portulaca oleracea extract can cause liver and kidney damage in animal models.The toxic effects of Portulaca oleracea are thought to be due to the presence of oxalates and nitrates in the plant.However,these toxic effects have not been observed in human studies,where Portulaca oleracea was found to be safe for consumption.Conclusion:In conclusion,Portulaca oleracea,a medicinal plant with potential health benefits,has neuroendocrine effects like neuroprotective,anxiolytic,and anti-depressant properties.However,high doses should be used cautiously due to potential toxicological effects.展开更多
基金supported by the Key Research and Development Program of Ningxia(Grant No.2023BCF01046)。
文摘Brackish water(BW)irrigation may cause soil quality deterioration and thereby a decrease in crop yields.Here we examined the impacts of applying gasification filter cake(GFC),intercropping with Portulaca oleracea(PO),and their combination on soil quality,nutrient uptake by plants and tomato yields under BW irrigation.The treatments evaluated included(i)freshwater irrigation(Control),(ii)BW irrigation,(iii)GFC application under BW irrigation(BW+GFC),(iv)intercropping with PO under BW irrigation(BW+PO),and(v)the combined application of GFC and PO under BW irrigation(BW+PO+GFC).Overall,the use of BW for irrigation resulted in a decline in both soil quality(assessed by a soil quality index(SQI)integrating a wide range of key soil properties including salinity,nutrient availability and microbial activities)and crop yields.Nevertheless,when subjected to BW irrigation,the application of GFC successfully prevented soil salinity.Additionally,the intercropping of PO decreased the soil sodium adsorption ratio and improved the absorption of nutrients by plants.As a result,the BW+GFC+PO treatment generally showed higher tomato yield as compared to other BW-related treatments(i.e.BW,BW+GFC and BW+PO).Compared to BW,the BW+GFC+PO treatment had an average increase of 24.7% in the total fruit yield of four Cropping Seasons.Furthermore,the BW+GFC+PO treatment consistently exhibited the highest fruit quality index(FQI).Taken together,the combined application of GFC and PO is effective in promoting soil quality and crop yields under BW irrigation.
文摘Salinity stress is amajor constraint on agricultural productivity,particularly in arid and semi-arid regions.This study evaluated the potential of Ascophyllum nodosum extract(ANE)in mitigating salinity-induced stress and enhancing the growth and physiological performance of Portulaca oleracea L.under NaCl concentrations of 0,50,70,and 100 mM for 50 days.A two-way ANOVA assessed the effects of NaCl concentration,ANE treatment,and their interaction.The results showed that ANE significantly increased plant height at 50 mMNaCl(p=0.0011)but had no effect at higher salinity levels(p>0.05).Shoot dry weight was significantly influenced by the interaction of NaCl and ANE(p=0.0064),with ANE increasing biomass at 0 mM but decreasing it at 100 mM NaCl.However,ANE did not significantly affect root dry weight(p>0.05).Physiological responses indicated a significant increase in proline content at 50mMNaCl(p=0.0011),supporting improved osmotic adjustment.Total soluble protein was significantly enhanced at all salinity levels except 100 mM NaCl(p<0.01).Regarding ionic regulation,ANE had no significant effect on leaf sap pH(p>0.05)but increased electrical conductivity(EC)at 70 and 100 mM NaCl(p<0.01),suggesting a role in ion homeostasis under high salinity.Photosynthetic pigments responded positively to ANE,with significant increases in chlorophyll“a”(p<0.0001)and carotenoid content(p<0.0001),while chlorophyll“b”remained unchanged(p>0.05).These findings highlight ANE’s potential as a sustainable biostimulant for improving salinity tolerance,particularly at moderate NaCl levels.Future research should focus on molecular mechanisms and long-term field applications to optimize ANE’s role in enhancing soil and crop productivity under salinity stress.
文摘Portulaca oleracea L. is distributed widely in China and some othercountries, which is included in the pharmacopoeias of China. In tradition, it is used in thetreatment of atheroma, and also used as antifungal and antiviral agents now. It also decreases bloodsugar, enhances immunity and adjusts blood lipids. The anticancer and antifungal effects ofPortulaca oleracea L. were reported in several patents. But no active component has been found. Inthis study, the chemical compositions from Portulaca oleracea L. were investigated to provideevidence for the activity of Portulaca oleracea L. .
文摘[Objective] The experiment studied on insecticidal and antifeedant action of on Portulaca oleracea L.to provide theoretical basis for developing a new botanical insecticide by taking Portulaca oleracea L.as a raw material.[Method] The insecticidal activities of the ethanol extracts and 5 kinds of extracts with petroleum ether,chloroform,ethyl acetate,n-butanol,water from Portulaca oleracea L..against Aphis sp.was studied;Leaves are using drug treatments of 5 extracts anti-feedant activity of Aphis sp.[Result] The results showed that 95% ethanol extract displayed high contact activity to Aphis sp.The corrected mortality after 48 h reached 95.4 % under the concentration of 50.00 mg·ml-1 and the insecticidal activities of 5 extracts against Aphis sp.was in the order that petroleum ether > chloroform > n-butanol > ethyl acetate >water.Five kinds of anti-feeding activity in the extract of the order for the water> ethyl acetate> n-butanol > chloroform >petroleum ether.[Conclusion] The extract from Portulaca oleracea L.has a strong contact toxicity of pesticide active on Aphis sp.substances and for a small polar compounds,the strong anti-feeding activity is a kind of larger polar compounds.
基金National Natural Science Foundation of China(Grant No.81073005)Science and Technology Development Program of Shandong Province(Grant No.2014GSF119007)+2 种基金Major Project of Science and Technology of Shandong Province(Grant No.2015ZDJS04001)Young Scholars Program of Shandong University(Grant No.YSPSDU2015WLJH50)China-Australia Centre for Health Sciences Research(2015)
文摘In the present study, we aimed to intensively study the chemical constituents, especially organic acids from a medicinal plant Portulaca oleracea L., and screen their anti-inflammatory and quinone reductase （QR, a phase II detoxyfication enzyme） inductive activity. A total of 20 compounds were isolated and identified based on spectroscopic methods, as succinic acid （1）, mono-methyl succinate （2）, L-malic acid （3）, L-l-methyl malate （4）, L-4-methyl malate （5）, L-dimethyl malate （6）, L-6-ethyl citrate （7）, L-1-methyl citrate （8）, L-1,5-dimethyl citrate （9）, 4-hydroxy-5-methylfuran-3-carboxylic acid （10）, 5-hydroxymethyl-furoic acid （11）, stearic acid （12）, L-pyroglutamic acid （13）, cyclo-（tyrosine-leucine） （14）, L-isoleucine （15）, （-）-dehydrovomifoliol （16）, （-）-epiloliolide （17）, 3,4-dihydroxyphenylethanol （18）, succinimide （19）, and uracil （20）. Among them, 14 compounds （2, 4-8, 10, 11, 13-18） were isolated from P. oleracea for the first time. Compotmd 18 （12.5 μM） exhibited potent anti-inflammatory effect in lipopolysaccharide （LPS）-induced macrophage cells （RAW264.7） by reducing NO production, and it also increased QR activity in Hepa lclc7 cells. Compound 16 （50 μM） showed weak QR inductive activity. None of other compounds showed anti-inflammatory or QR inductive activities.
基金Financially supported by Education Ministry of China (Gr ant No. 1998-679)
文摘Objective: To study the effects of Portulaca oler acea, a Chinese medicinal herb, on insulin resistance in rats with type 2 diabet es mellitus (T2DM). Methods: Experimental model of T2DM was established by injection of streptozotocin (25mg/kg) and feeding with high calorie forage. The effects o f Portulaca oleracea on oral glucose tolerance, serum levels of insulin, triglyc eride, total cholesterol, high density lipoproteins cholesterol and free f atty acids, and insulin sensitivity index were all observed. Results: Portulaca oleracea could reduce the body weight, improve the impaired glucose tolerance and lipid metabolism, decrease serum free fatty acids, attenuate hyperinsulinemia and elevate insulin sensitivity. Conclusion: Portulaca oleracea could improve insulin resistance i n rats with T2DM, and the mechanism might be related to its actions in improving lipid metabolism and decreasing free fatty acids.
文摘With Portulaca oleracea L. as an experimental material, its total DNA was extracted by the improved CTAB method, the ISSR-PCR primers were screened, and the ISSR-PCR reaction system and reaction conditions for P. oleracea were Optimized. The results showed that there were 8 primers suitable for ISSR-PCR of P. oleracea. The optimal reaction system had a volume of 25 μl, including 2 x Taq Platinum PCR Master Mix 12.5 μl, primer 2 μl, ddH20 9.5 μl, and DNA template 1μl. The optimized ISSR-PCR of P. oleracea was started with pre-denaturation at 94 ℃ for 360 s, followed by 30 cycles of denaturation at 94 ℃ for 60 s, annealing at 54 ℃ for 60 s and extension at 72 ℃ for 90 s, and completed by extension at 72 ℃ for 300 s.
基金Supported by Hainan Spark Industrial Zone Project(HNXH201504)
文摘To improve understanding of Portulaca pilosa seed germination and lay technical foundation for seedling cultivation,this paper studies the characteristics of dormancy and germination of Portulaca pilosa seed. Research indicates that its primary seed dormancy period is about25 d,dormancy can be completely released by storage at room temperature for 30 d; the seed is positively photoblastic seed that can't sprout and can be induced into dormancy in low light conditions; the dormancy-released seed is more sensitive to light when compared with the freshly picked seed,and the germination peak arises 1 d earlier; Portulaca pilosa seed favorites humid conditions,and the higher the soil moisture,the higher the germination rate and germination energy of the seed. The dormancy-released seeds should be used for Portulaca pilosa seedling cultivation,and after the germination is accelerated for 2- 3 d in the light conditions,the seeds are sown on the soil surface,and covered with transparent plastic film to keep moisture and light,which is conducive to the emergence of seeds.
文摘Portulaca oleracea leaves are tested as an agriculture adsorbent material for reducing Pb(II) from aqueous solutions. The pH of solution, adsorbent dose, shaking speed and particles size of adsorbent were constants at all adsorption experiments. Effects of contact time on adsorption capacity of Pb(II) onto Portulaca oleracea leaves were studied. The adsorption capacity increased as the contact time increased and reached equilibrium at one hour. Kinetic models including a first-order, pseudo-second-order and intra-particle diffusion equations were selected to follow the adsorption process. The process follows a pseudo-second-order kinetic and the intra-particle diffusion is the main step to interpret the mechanism of adsorption. Langmuir, Freundlich and Dubinin-Radush Kevich (D-R) isotherm models were applied to describe adsorption equilibrium data. Results proved that the Langmuir isotherm model gave an acceptable fit to the experimental data more than Freundlich isotherm model. Maximum adsorption capacities obtained were 192.3, 333.3 and 434 mg/g at 295, 303 and 310 K, respectively. According to D-R isotherm data, the adsorption process is classified as physical adsorption. Thermodynamically, the adsorption process is non spontaneous, endothermic and random in nature.
文摘OBJECTIVE: To find scientific reasons for adverse events reported in Traditional Iranian Medicine (TIM) following administration of aqueous extract of Herba Portulacae Oleraceae seed including itching and tingling of whole body, tachycardia, anxiety, dyspnea and severe nausea. METHODS: Electronic databases including PubMed, Scopus, and Web of Science were searched up to April 2013 to find papers focused on phytochemistry and biological activities of this plant. RESULTS: Among chemical constituents present in Herba Portulacae oleraceae, catecholamines, adenosine and niacin can cause adverse events similar to those reported inTIM. CONCLUSION: Because of the short duration of action of adenosine, catecholamines and niacin seems to be the major role in appearance of ad-verse events reported in TIM for Herba Portulacae Oleraceae seed. Mechanisms with consideration of receptor types and pharmacokinetics of catecholamine and niacin are warranted to confirm this hypothesis.
文摘The aim of this study was to investigate the antihyperglycemic and antioxidant effects of Po （Portulaca oleracea） lyophilised aqueous extract in diabetic male Wistar rats. Diabetes was induced intraperitonially by a single injection of STZ （streptozotocin） （60 mg/kg bw （body weight））. Twenty diabetic rats, weighing 263 ± 5 g, were divided into two groups fed a casein diet supplemented or not with Po extract （1 g/kg bw）, for four weeks. Control group （n = 6） received 0.23-0.25 mL of citrate buffer and was fed a standard diet during the experiment. The study was carried out at Oran University, Algeria and the entire experiments lasted from September 2011 to July 2012. Blood was obtained from the abdominal aorta of rats after fasting overnight and standard methods were used for the extraction of spices, determination of glycemia, insulinemia, lipid peroxidation and antioxidant enzymes activities. Portulaca oleracea treated compared to untreated rats, glycemia and HbAIc values were respectively 2.8- and 1.7-fold lower. TBARS （thiobarbituric acid reactive substances） concentrations were reduced in RBC （red blood cells） （-54%） and plasma （-65%）. Moreover, in liver and kidney, TBARS values were respectively 1.8- and 2-fold lower. SOD （superoxide dismutase） and GSH-Px （glutathione peroxidase） activities were increased respectively by ＋38% and ＋85%, in liver. GSSG-Red （glutathione reductase） activity was 1.9-fold higher in kidney, while CAT （catalase） was improved in kidney （＋48%）. In RBCs, SOD, GSH-Px, GSSH-Red and CAT activities were increased by 31%, 42%, 56% and ＋50%, respectively. These data have cast a new light on the actions of Portulaca oleracea and its antioxidant potential benefits in preventing diabetes and its complications.
基金This work was financially supported by National Nature Science Foundation of China(81973284)Scientific Research Foundation of the Education Department of Liaoning Province(LJKZ0944).
文摘Portulaca oleracea(P.oleracea)is a traditional Chinese herbal that has the effects of soothing the liver and clearing collaterals,strengthening the spleen and stomach,moistening the intestines and detoxifying.With the development of the pharmaceutical industry,the medicinal value of P.oleracea is becoming increasingly prominent.It is commonly used in clinical practice for clearing heat and detoxifying,inhibiting bacteria,preventing and treating diseases such as hypertension,coronary heart disease,and cerebral infarction,indicating its broad application prospects.This study reviews the chemical components and pharmacological activities of P.oleracea in recent decades.
文摘The contamination of soils with heavy metals(HMs)and their accumulation in local plants has become an increasing issue because of industrial activities.This study investigated the extent of HMs contamination in soils and Purslane(Portulaca oleracea)in the Bassa Industrial Zone,Douala-Cameroon,focusing on the implications for environmental health and ecosystem sustainability.We collected 17 surface soil samples and 4 composite purslane leaf samples from different sampling locations in the industrial site.The HMs(Cd,Pb,As,Cr,Cu and Ni)were analyzed with an Inductively Coupled Plasma-Optical Emission Spectroscopy(ICP-OES).The results revealed that,the HM concentrations(except for Cd and Ni)in most locations exceeded the Soil Quality Guidelines for industrial land use.The Pollution Load Index confirmed the presence of heavy metal pollution in all the sample locations.Potential Ecological Risk In dex highlighted varying levels of risk across locations,presenting moderate,high,and significantly high ecological risk.The primary contributors to eco-logical risk were Pb,Cd,and Cu.Furthermore,the geo-accumulation index revealed heavily to extremely high contamination in several locations.Princi pal Component Analysis suggested that Cd,As,Cr,Cu,and Ni likely originated from common sources,while Pb had a distinct source,all due to anthropogenic activities.Additionally,Cr concentrations in purslane leaves exceeded the nor-mal range,with one location recording a value(5.41 mg kg^(-1))which was within the maximum toxicity threshold for plants.These findings underline the need for remedial measures to mitigate the adverse effects of heavy metal contami nation in the Bassa Industrial Zone.
文摘Background:Portulaca oleracea L.,a traditional medicine with bioactive compounds like flavonoids and omega-3 fatty acids,has gained interest in its neuroendocrine and toxicological effects.Objectives:The aim of this review is to provide a comprehensive summary of the current knowledge on the neuroendocrine and toxicological activities of Portulaca oleracea.This review also highlights the potential mechanisms of action of these activities.Methods:A literature search was conducted using various databases such as PubMed,ScienceDirect,and Google Scholar.Keywords such as’Portulaca oleracea’,’purslane’,’neuroendocrine activity’,and’toxicological activity’were used to identify relevant articles.Only studies published in English were included in this review.Results:Portulaca oleracea has been found to improve testicular and cognitive function as well as memory in animal models of Alzheimer’s disease and cerebral ischemia due to its antioxidant,anti-inflammatory properties,anti-anxiety and anti-depressant effects.On the other hand,Portulaca oleracea has also been reported to possess toxicological activities.Studies have shown that high doses of Portulaca oleracea extract can cause liver and kidney damage in animal models.The toxic effects of Portulaca oleracea are thought to be due to the presence of oxalates and nitrates in the plant.However,these toxic effects have not been observed in human studies,where Portulaca oleracea was found to be safe for consumption.Conclusion:In conclusion,Portulaca oleracea,a medicinal plant with potential health benefits,has neuroendocrine effects like neuroprotective,anxiolytic,and anti-depressant properties.However,high doses should be used cautiously due to potential toxicological effects.
