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当年生桑树(Morus alba L.)果枝叶片特征与果实性状的相关性 被引量:1
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作者 王悦 胥晓 +2 位作者 刘刚 秦芳 陈梦华 《中国农学通报》 CSCD 2014年第28期46-52,共7页
为揭示叶果间的内在作用规律,以桑树(Morus alba L.)当年生果枝为研究对象,分析不同大小果枝上叶片特征和果实性状的差异及其二者间的相互关系。结果表明:随着果枝由小到大,果枝上的叶片数与总叶干重显著增加,而叶形指数却无显著变化;... 为揭示叶果间的内在作用规律,以桑树(Morus alba L.)当年生果枝为研究对象,分析不同大小果枝上叶片特征和果实性状的差异及其二者间的相互关系。结果表明:随着果枝由小到大,果枝上的叶片数与总叶干重显著增加,而叶形指数却无显著变化;桑葚数与总桑葚干重也有显著增加,桑葚含水量无显著变化。桑葚数与叶片数、总叶干重、总叶面积及其平均桑葚干重显著正相关。研究结果证实了果实的性状与叶片特征之间存在极密切关系。当年生果枝上的桑葚数量多少取决于果枝上的叶片总数,平均桑葚的干重则与果枝上的平均叶面积显著相关。 展开更多
关键词 桑树 叶片数量 桑葚数量 桑葚干重 平均叶面积
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桑树(Morus alba L.)原位修复某尾矿区重金属污染土壤 被引量:20
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作者 曾鹏 郭朝晖 +2 位作者 韩自玉 肖细元 彭驰 《环境化学》 CAS CSCD 北大核心 2020年第5期1395-1403,共9页
木本植物具有根系发达、生物量大、适应性强等特点,可广泛用于重金属污染土壤修复.本文通过5年的田间修复试验,研究了桑树(Morus alba L.)对污染土壤中重金属的累积和分布特征、土壤中重金属和营养元素有效性含量的变化,来探讨桑树修复... 木本植物具有根系发达、生物量大、适应性强等特点,可广泛用于重金属污染土壤修复.本文通过5年的田间修复试验,研究了桑树(Morus alba L.)对污染土壤中重金属的累积和分布特征、土壤中重金属和营养元素有效性含量的变化,来探讨桑树修复某尾矿区污染土壤中Mn、Zn和Cd等重金属的效果.研究结果表明,桑树生物量大,可用于重金属污染土壤的生态修复与景观恢复.田间种植5年后,桑树整株干重每株可达4 kg.桑树对土壤中重金属具有一定的转运和累积能力,地上部分中Cd、Zn和Mn等重金属含量明显大于根部,尤其是叶片中重金属含量明显大于枝和主干中的含量.修复5年后,桑树地上部分Zn和Mn的累积总量可达3277.7 mg·100 m-2和2422.4 mg·100 m-2,且土壤中Mn和Zn含量分别从2192.5 mg·kg-1和103.2 mg·kg-1降低至1790.0 mg·kg-1和85.94 mg·kg-1,同时土壤有效态Mn和Zn分别显著(P<0.05)降低66.0%和28.6%.然而,桑树落叶中Cd、Zn和Mn含量分别可达0.36、64.5、189.2 mg·kg-1.因此,通过定期清除桑树落叶或刈割地上部分,可防止叶片中重金属对土壤造成二次污染,同时削减土壤中重金属含量.同时,经桑树修复5年后土壤中碱解氮、有效磷和速效钾含量均显著(P<0.05)降低,需定期补充相应氮、磷和钾肥来强化桑树修复尾矿区重金属污染土壤. 展开更多
关键词 桑树 重金属 污染土壤 原位修复 土壤肥力
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A new alkylene dihydrofuran glycoside with antioxidation activity from the root bark of Morus alba L. 被引量:2
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作者 Wei Fu Yong Fang Lei Ya Ling Cai Dao Nian Zhou Jin Lan Ruan 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第7期821-823,共3页
A new alkylene dihydrofuran glycoside(1) was isolated from the root bark ofMorus alba L.,along with moracin M-3′-O-β-D-glucopyranoside (2),and moracin M-6,3′-di-O-β-D-glucopyranoside(3).Compound 1 was identi... A new alkylene dihydrofuran glycoside(1) was isolated from the root bark ofMorus alba L.,along with moracin M-3′-O-β-D-glucopyranoside (2),and moracin M-6,3′-di-O-β-D-glucopyranoside(3).Compound 1 was identified as 2-methylene-3-methoxy-2, 5-dihydrofuran-4-O-β-D-glucopyranoside on the basis of chemical and spectroscopic data including 1D and 2D NMR spectral analysis.In addition,the antioxidant activity of 1 was evaluated using the 1,1-diphenyl-2-picrylhydrazyl(DPPH) and 2,2′-azinobis- 3-ethylbenzothiazoline-6-sulphonic acid(ABTS) assay.The IC_(50) values were 2.49 and 0.45 mg/mL,respectively. 展开更多
关键词 morus alba L. Dihydrofuran glycoside Spectral analysis Antioxidation activity
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A new prenylated arylbenzofuran derivative from Morus alba L. 被引量:3
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作者 Tian, Hai Ying He, Xi +5 位作者 Zeng, Guang Yao Tan, Jian Bin Shuang, Fu Liu, Guo Ru Tan, Gui Shan Zhou, Ying Jun 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第3期329-331,共3页
2-[3,5-Di-O-β-D-glucosyl-4-(3-methylbut-2-enyl)phenyl]benzofuran-6-ol,a new prenylated arylbenzofuran derivative was isolated from Morus alba L.Its structure was elucidated by various spectroscopic methods including ... 2-[3,5-Di-O-β-D-glucosyl-4-(3-methylbut-2-enyl)phenyl]benzofuran-6-ol,a new prenylated arylbenzofuran derivative was isolated from Morus alba L.Its structure was elucidated by various spectroscopic methods including MS,~1H NMR,^(13)C NMR,DEPT,~1H-~1HCOSY,HMQC and HMBC. 展开更多
关键词 morus alba L. Prenylated arylbenzofuran 2-[3 5-Di-O-β-D-glu-4-(3-methylbut-2-enyl)phenyl]benzofuran-6-ol
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Research and Prospect of Mulberry (Morus alba L.) 被引量:2
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作者 Zhenhua SUN Li LI Wenfang MA 《Agricultural Biotechnology》 CAS 2019年第4期136-139,共4页
Mulberry(Morus alba L.)is not only rich in nutrients,but also has medicinal value.As a drug and food,it is widely planted all over the country,with considerable yield and economic value.In recent years,it has attracte... Mulberry(Morus alba L.)is not only rich in nutrients,but also has medicinal value.As a drug and food,it is widely planted all over the country,with considerable yield and economic value.In recent years,it has attracted many scholars and been widely reported,and in-depth research has already been conducted.Through reviewing the literatures on mulberry,this paper summarized the chemical composition,pharmacological effects and quality evaluation of mulberry,providing some reference for the further development and utilization of mulberry. 展开更多
关键词 morus alba L. Chemical components PHARMACOLOGY Quality evaluation RESEARCH progress
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High Phenotypic Variation in Morus alba L. along an Altitudinal Gradient in the Indian Trans-Himalaya 被引量:2
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作者 Prabodh K. BAJPAI Ashish R. WARGHAT +3 位作者 Ashish YADAV Anil KANT Ravi B. SRIVASTAVA Tsering STOBDAN 《Journal of Mountain Science》 SCIE CSCD 2015年第2期446-455,共10页
Ten quantitative morphological characters were studied in 56 Morus alba L. trees representing three natural populations from the trans-Himalayan Ladakh region. The altitude of collection sites ranged from 2815 to 3177... Ten quantitative morphological characters were studied in 56 Morus alba L. trees representing three natural populations from the trans-Himalayan Ladakh region. The altitude of collection sites ranged from 2815 to 3177 m above the sea level(asl). Coefficient of variation(CV) showed high phenotypic variation in M. alba. Linear regression analysis revealed that leaf and fruit size decreases with an increase in altitude. High CV was observed for leaf length, leaf width, petiole length, leaf area, internodal distance, number of nodes, bud length, fruit length, fruit width and fruit weight. Similarly, a high phenotypic plasticity index was observed for bud length, leaf length, leaf width, petiole length, leaf area, inter-nodal distance, number of nodes, fruit length, fruit width and fruit weight. For every 100 m increase in altitude, leaf length, leaf width and leaf area decreased by 1 cm, 0.8 cm and 16.6 cm2, respectively. Analysis of covariance showed a predominant altitudinal effect on the morphological characters in comparison to the population effect. A small change in the altitude caused significant change in the plant morphological characteristics. The present investigation represents to our knowledge the first study addressing phenotypic variation in mulberryalong an altitudinal gradient. 展开更多
关键词 Adaptation LADAKH LEAF MORPHOMETRY MULBERRY morus alba Stress
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Evaluation of the Liver Cancer Prevention of Anthocyanin Extracts from Mulberry (<i>Morus alba</i>L.) Variety PR-01 被引量:2
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作者 Sufeng Liao Jianghong Liu +1 位作者 Ming Xu Jingui Zheng 《Advances in Bioscience and Biotechnology》 2018年第9期423-442,共20页
This study aims to evaluate the preventive effects of anthocyanins extracts (MAEs) from mulberry variety PR-01 against N-nitrosodiethylamine (NDEA)-induced hepatocarcinogenesis in rats. It was found that 150 mg·k... This study aims to evaluate the preventive effects of anthocyanins extracts (MAEs) from mulberry variety PR-01 against N-nitrosodiethylamine (NDEA)-induced hepatocarcinogenesis in rats. It was found that 150 mg·kg-1 MAEs treatment significantly reduced the NDEA-induced hepatic nodules incidence and hepatocellular carcinoma incidence by 58.30% and 41.70% compared to the model group. Meanwhile, MAEs significantly restored the elevated the liver function enzymes, inhibited the tumor necrosis factor alpha and interleukin-6 levels, elevated the serum interleukin-10 and interferon-γ and increased hepatic glutathione-S-transferase and UDP-glucuronosyltransferase 2B1 enzyme activity. Moreover, 150 mg·kg-1 MAEs supplement enhanced glutathione content and the activities of superoxide dismutase, catalase, glutathione peroxidase activities but reduced the malondialdehyde and thiobarbituric acid-reactive substances content by 37.90% and 44.52%. Furthermore, MAEs pretreatment maintained nuclear factor erythroid 2-related factor 2 (Nrf2), Kelch-like ECH-associated protein 1, heme oxygenase-1, and NAD(P)H: quinine oxidoreductase1 stimulation and inhibited the expression of TNF-α, nuclear factor-kappaB (NF-κB), and cyclooxygenase-2 (COX-2), indicating that MAEs exhibit effectively prevention effects against liver cancer via decreased lipid peroxidation, induced Nrf2-mediated antioxidant enzymes and attenuating the inflammatory mediators COX-2 through NF-κB pathway. Thus, MAEs of mulberry variety PR-01 may be used as a good functional dietary supplement against liver cancer. 展开更多
关键词 MULBERRY (morus alba L.) Anthocyanins EXTRACTS N-NITROSODIETHYLAMINE Hepatocarcinogenesis Antioxidation Anti-Inflammatory
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Correlation between Different Morus alba L. Leaf Nodes and the Change in Leaf Size or Mass 被引量:2
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作者 Fanglun JIN Shengte YANG +5 位作者 Chaobin LUO Ming LI Shiye HU Fawei ZHANG Xian YUE Wenxue WANG 《Asian Agricultural Research》 2017年第11期70-74,共5页
This paper aimed to explore the correlation between Morus alba L. leaf node and its size or mass change and provide a theoretical basis for the development of scientific Morus alba L. cultivation technology. During 20... This paper aimed to explore the correlation between Morus alba L. leaf node and its size or mass change and provide a theoretical basis for the development of scientific Morus alba L. cultivation technology. During 2016-2017,the correlation between Morus alba L. leaf node and its size or mass change was investigated and researched. Results showed that through the correlation coefficient analysis,there was a weakly positive correlation between the leaf node and some indicators such as( leaf length ÷ leaf width) and petiole length,there was a weakly negative correlation between the leaf node and some indicators such as leaf width,( leaf length + leaf width),( leaf length × leaf width) and leaf mass,and there was a weakly negative correlation between the leaf node and the other indicators; there was a highly positive correlation between the leaf mass and some indicators such as Morus alba L. leaf length,leaf width,( leaf length + leaf width) and( leaf length × leaf width),there was a significantly positive correlation between the leaf mass and some indicators such as petiole transverse diameter in width and petiole mass,and there was a weakly positive correlation between the leaf mass and some indicators such as petiole transverse diameter in thickness. In terms of significant level of difference,it was found that there was no significant difference in the correlation coefficients between the leaf nodes on the Morus alba L. shoots and some indicators such as leaf length,leaf width,( leaf length + leaf width),( leaf length × leaf width) and leaf mass; there was an extremely significant difference in the correlation coefficients between the leaf mass and some indicators such as Morus alba L. leaf length,leaf width,( leaf length + leaf width),( leaf length × leaf width),petiole transverse diameter in width and petiole mass; there was no significant difference in the correlation coefficients between the leaf mass and the other indicators. The regression analysis was performed on the leaf node and leaf length,leaf width,( leaf length + leaf width),( leaf length × leaf width),( leaf length ÷ leaf width),petiole length,petiole diameter in width,petiole diameter in thickness,petiole mass and leaf mass. Significance F values were0. 4864,0. 1995,0. 2888,0. 3004,0. 2350,0. 2407,0. 8925,0. 5227,0. 7022 and 0. 2000,respectively,that is,there was an extremely significant difference between Morus alba L. leaf node and petiole diameter in width,there was a significant difference between Morus alba L.leaf node and petiole mass,and there was no significant difference between Morus alba L. leaf node and the other indicators. The comparative analysis of quadratic curve regression equation and linear regression equation was performed on some indicators such as leaf length,and it was found that the R value between the leaf node and petiole diameter in width was in line with the logarithmic curve regression equation,and the other R values of quadratic curve regression equation was larger than the other R values of linear regression equation,indicating that different Morus alba L. leaf nodes,leaf length,leaf mass and other indicators were in line with the quadratic curve regression equation. It was concluded that by investigating the leaf node on the Morus alba L. shoots and regression equation,we could predict the leaf size,leaf mass and other indicators,and we could take the leaf node on the Morus alba L. shoots as a main factor affecting the Morus alba L. leaf size and mass. 展开更多
关键词 morus alba L.Leaves NODE SIZE MASS CORRELATION
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Selection and characterisation of lactic acid bacteria isolated from different origins for ensiling Robinia pseudoacacia and Morus alba L.leaves 被引量:1
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作者 NI Kui-kui YANG Hui-xiao +2 位作者 HUA Wei WANG Yan-ping PANG Hui-li 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2016年第10期2353-2362,共10页
The objective of this study was to isolate lactic acid bacteria(LAB) strains from different origins and to select the best strains for ensiling Robinia pseudoacacia(RB) and Morus alba L.(MB)leaves. The LAB strai... The objective of this study was to isolate lactic acid bacteria(LAB) strains from different origins and to select the best strains for ensiling Robinia pseudoacacia(RB) and Morus alba L.(MB)leaves. The LAB strains were inoculated into the extracted liquid obtained from RB and MB leaves to evaluate the fermentation products. 11 LAB strains were selected for further experiments based on the highest products of lactic or acetic acid, including 1 strain of Weissella confusa, 2 of Lactobacillus reuteri and 8 of Lactobacillus plantarum.The API 50 CH fermentation experiment indicated that all of the selected 11 LAB strains utilised most of the carbohydrates. All the strains grew at temperatures between 10 and 45℃ and at a p H of 3.5 to 4.5; however, L. reuteri F7 and F8 tolerated a p H as low as 3.0. All 11 LAB strains showed antibacterial activity against Listeria monocytogens, Escherichia coil, Salmonella sp. and Acetobacter pasteurianus; however, after excluding the effect of organic acids, only F7 and F8 still exhibited antibacterial activity. The present study indicated that the selected 11 LAB strains could be used to prepare silages of RB and MB leaves, especially L. reuteri F7 and F8. 展开更多
关键词 lactic acid bacteria morus alba L Robinia pseudoacacia silage
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Characteristics of <i>Morus alba</i>L. Cultured by In-Room Hydroponics
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作者 Misato Sakurai Shinji Sato +1 位作者 Tomoko Fukushima Tetsuya Konishi 《American Journal of Plant Sciences》 2022年第1期91-108,共18页
<i><span style="font-family:"">Morus alba </span></i><span style="font-family:"">L<i>.,</i></span><span style="font-family:"&q... <i><span style="font-family:"">Morus alba </span></i><span style="font-family:"">L<i>.,</i></span><span style="font-family:""> (cv Ichinose) was cultivated by in-room hydroponics. The flavor and texture of leaves were markedly improved enough to be edible. When the contents of 1-deoxynojirimycin (DNJ) and polyphenols were measured in the hydroponic cultivar, DNJ increased in the leaf compared to the field grown <i>M. alba</i>. However, polyphenols, in contrast, decreased compared to the field cultivar. HPLC profiling revealed marked difference in leaf components between hydroponic and field cultivars indicating relative contents of lipo<span>philic polyphenols were increased. The polyphenols contents, especially, li</span>po<span>philic polyphenols in the root were remarkably high compared to So-Haku-Hi (Sang Bai Pi in Chinese).</span> The anti-obesity effect of the hydroponically grown <i>Morus</i> was further studied in rats by feeding high-fat, high-sucrose (HFHS) diet with and without supplementation of dried leaf and root powders for 15 weeks. As the result, both the leaf and root from the hydroponic cultivar showed potential anti-obesity and anti-hyperlipidemic functions through amelioration of insulin resistance. Differential effects of leaf and root powders indicated that besides DNJ, the lipophilic polyphenols may play a crucial role in the anti-diabetic function of hydroponically grown <i>Morus alba </i>L. The hydroponics will provide an alternate way to cultivate a novel resource of <i>Morus</i> for developing functional foods and medicines. 展开更多
关键词 Hydroponic Culture morus alba L. DNJ Anti-Diabetic Function Functional Manipulation
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植物乳杆菌与纤维素酶添加对桑枝叶发酵品质的影响
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作者 陈芯怡 刘国宏 +4 位作者 闫云峰 郑晓凯 李海峰 马春晖 张凡凡 《草地学报》 北大核心 2026年第1期340-347,共8页
本研究旨在探究联合添加植物乳杆菌(Lactiplantibacillus plantarum)与纤维素酶(cellulase)对桑枝叶(Morus alba)青贮发酵品质的改善效果,为桑枝叶资源饲料化利用提供依据。本研究设置3个处理组[CK(不添加菌剂)、SL(添加5×10^(5) C... 本研究旨在探究联合添加植物乳杆菌(Lactiplantibacillus plantarum)与纤维素酶(cellulase)对桑枝叶(Morus alba)青贮发酵品质的改善效果,为桑枝叶资源饲料化利用提供依据。本研究设置3个处理组[CK(不添加菌剂)、SL(添加5×10^(5) CFU·g^(-1) FM植物乳杆菌)和SLC(添加5×10^(5) CFU·g^(-1) FM植物乳杆菌+0.3%FM纤维素酶)],每组6个重复。发酵60 d后检测感官指标、营养成分、发酵品质和主要微生物数量,同时进行体外发酵试验评定其产气特性。结果表明:相比于CK处理,SLC处理中干物质、粗蛋白、水溶性碳水化合物、乳酸、乙酸含量和乳酸菌数量显著增加(P<0.05),中性洗涤纤维、酸性洗涤纤维含量和pH值以及酵母菌、霉菌和好氧细菌数量显著降低(P<0.05);相比于CK处理,SLC处理的有机物降解率、产气量和产气速率显著提高(P<0.05)。由此可见,联合添加植物乳杆菌与纤维素酶能够显著改善桑枝叶青贮发酵品质,减少营养物质损耗,提高饲喂价值。 展开更多
关键词 桑枝叶 植物乳杆菌 纤维素酶 发酵品质 产气特性
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桑树内生菌的分离鉴定及功能菌筛选 被引量:1
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作者 李莎 杨加虎 +2 位作者 王艳辉 黄新球 杨文 《河南农业科学》 北大核心 2025年第3期77-86,共10页
采用微生物培养、目标基因序列扩增与同源性鉴定等方法对桑树(Morus alba L.)内生菌进行分离与鉴定,探讨云桑6号桑树根、茎、叶中的内生细菌和内生真菌的菌株种类、分布特性及菌株功能特性。结果表明,从桑树中共分离得到9属43株内生细菌... 采用微生物培养、目标基因序列扩增与同源性鉴定等方法对桑树(Morus alba L.)内生菌进行分离与鉴定,探讨云桑6号桑树根、茎、叶中的内生细菌和内生真菌的菌株种类、分布特性及菌株功能特性。结果表明,从桑树中共分离得到9属43株内生细菌及14属22株内生真菌,其中从根部分离得到21株细菌和11株真菌,从茎中分离得到13株细菌和5株真菌,从叶中分离得到9株细菌和6株真菌。桑树根、茎、叶中的内生菌分布差异大,内生细菌在桑树根与茎中共有白色假芽孢杆菌(Falsibacillus pallidus)、贝莱斯芽孢杆菌(Bacillus velezensis)、韩国假单胞菌(Pseudomonas koreensis),茎与叶中共有成团泛菌(Pantoea agglomerans)、枯草芽孢杆菌(Bacillus subtilis)、韩国假单胞菌(Pseudomonas koreensis),根、茎、叶中共有韩国假单胞菌(Pseudomonas koreensis);内生真菌在桑树根与叶中共有炭疽病菌(Colletotrichum siamense),茎与叶、根与茎中没有检测到共有真菌存在。进一步的功能菌筛选结果表明,从65株内生菌中分别得到8株固氮功能菌(7株细菌、1株真菌)、4株溶磷菌(2株细菌、2株真菌)和8株解钾功能菌(6株细菌、2株真菌)。综上,桑树内生细菌、内生真菌在根、茎、叶中具有多样性和分布差异性,其中有溶磷、固氮、解钾等功能菌存在。 展开更多
关键词 桑树 内生真菌 内生细菌 分离鉴定 功能菌
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基于网络药理学探讨桑叶黄酮提取物对糖尿病脑病细胞模型保护作用机制 被引量:2
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作者 许涵 李梁 +3 位作者 柴涛 杜洪燕 李学理 江岩 《食品科学》 北大核心 2025年第10期167-177,共11页
目的:将网络药理学与分子生物学相结合,探讨桑叶黄酮提取物(mulberry leaf flavonoid extract,MFE)对糖尿病脑病(diabetic encephalopathy,DE)细胞模型作用机制。方法:慢性高糖刺激PC12细胞建立DE细胞模型,MFE干预48 h,测定细胞活力、... 目的:将网络药理学与分子生物学相结合,探讨桑叶黄酮提取物(mulberry leaf flavonoid extract,MFE)对糖尿病脑病(diabetic encephalopathy,DE)细胞模型作用机制。方法:慢性高糖刺激PC12细胞建立DE细胞模型,MFE干预48 h,测定细胞活力、氧化损伤指标、细胞凋亡率、晚期糖基化终末产物(advanced glycation end products,AGEs)含量等指标。通过网络药理学筛选MFE干预DE的关键靶点及通路,将MFE的主要组分和关键靶点进行分子对接。采用Western blot方法验证网络药理学筛选结果。结果:MFE干预后可提高细胞活力、有效降低AGEs与活性氧含量、抑制细胞凋亡、减轻氧化应激损伤及铁超载,对DE细胞具有明显的保护作用。网络药理学筛选出MFE干预DE的关键信号通路可能为糖尿病并发症AGEs-晚期糖基化终产物受体(receptor for advanced glycation end products,RAGE)、丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)及肿瘤坏死因子(tumor necrosis factor,TNF)信号通路,潜在作用靶点为MAPK14、蛋白激酶B1(protein kinase B1,AKT1)、TNF、MAPK1、MAPK8,分子对接证实MFE主要组分和上述潜在靶点均具有稳定的对接活性。Western blot结果显示,MFE可能通过激活AGEs-RAGE通路下游磷脂酰肌醇3-激酶/AKT/核因子红细胞2相关因子2/谷胱甘肽过氧化物酶通路蛋白表达,提高抗氧化能力、抑制铁死亡。同时,MFE可能抑制AGEs-RAGE通路下游MAPK14/核因子κB/Caspase-3通路蛋白表达,降低TNF-α等促炎因子表达,有效逆转细胞的炎症损伤及细胞凋亡,从而保护DE细胞免受高糖损伤。Western blot结果与网络药理学筛选的关键靶点及通路相对应。结论:MFE可能通过多途径、多靶点改善高糖诱导的PC12细胞损伤。 展开更多
关键词 桑叶 黄酮 糖尿病脑病 PC12细胞 网络药理学
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不同盐碱胁迫对2个桑品种种子萌发的影响
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作者 李佳奇 张沁 +2 位作者 贾富贵 沈子靖 史建国 《饲料研究》 北大核心 2025年第23期102-108,共7页
试验旨在探究盐碱胁迫对桑种子萌发特性的影响。以桑品种育71-1和丰田5号为材料,通过人工模拟不同浓度的混合中性盐[氯化钠(NaCl)、硫酸钠(Na_(2)SO_(4))]、混合碱性盐[碳酸钠(Na_(2)CO_(3))、碳酸氢钠(NaHCO_(3))]和复合盐碱(NaCl∶Na_... 试验旨在探究盐碱胁迫对桑种子萌发特性的影响。以桑品种育71-1和丰田5号为材料,通过人工模拟不同浓度的混合中性盐[氯化钠(NaCl)、硫酸钠(Na_(2)SO_(4))]、混合碱性盐[碳酸钠(Na_(2)CO_(3))、碳酸氢钠(NaHCO_(3))]和复合盐碱(NaCl∶Na_(2)SO_(4)∶Na_(2)CO_(3)∶NaHCO_(3)=4∶1∶4∶1)胁迫环境,在恒温培养箱中开展纸上萌发试验,系统测定发芽率、发芽势、发芽指数、相对胚根长、相对盐害率等8项萌发指标。结果显示,在低浓度复合盐碱(30~60 mmol/L)条件下,种子发芽率出现短期提高。混合中性盐环境更有利于胚根发育,在浓度为90 mmol/L时,两个品种的相对胚根长达到峰值(育71-1为89.11%,丰田5号为71.43%);而混合碱性盐与复合盐碱浓度超过60 mmol/L时,则表现出浓度依赖性抑制。相关性分析显示,发芽势与种子活力指数、发芽指数及相对发芽势呈极显著正相关(P<0.01),相对盐害率与发芽率呈极显著负相关(P<0.01)。综合分析表明,桑种子的耐盐碱能力依次为:混合中性盐>复合盐碱>混合碱性盐。研究表明,桑种子萌发期对盐碱胁迫的响应因盐分类型与浓度而异,其中低浓度(30~60 mmol/L)具有一定的萌发促进作用。 展开更多
关键词 种子萌发 盐碱胁迫 发芽指标
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63份桑树种质资源离体冬芽耐盐性评价
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作者 王彬彬 王晖 +3 位作者 高玉军 黄露 王敬 高妍夏 《种子》 北大核心 2025年第5期165-173,共9页
为了筛选耐盐性强的桑树种质资源,以63份桑树种质资源的冬芽为试验材料,在添加150 mmol/L NaCl的MS培养基中进行离体培养,测定冬芽组织培养的萌发状态指数和相对强芽生长量等指标。结果表明,盐胁迫处理后,参试种质冬芽的萌发状态指数变... 为了筛选耐盐性强的桑树种质资源,以63份桑树种质资源的冬芽为试验材料,在添加150 mmol/L NaCl的MS培养基中进行离体培养,测定冬芽组织培养的萌发状态指数和相对强芽生长量等指标。结果表明,盐胁迫处理后,参试种质冬芽的萌发状态指数变化范围为9.38%~100.00%,相对强芽生长量变化范围为12.62%~96.22%,盐胁迫下萌发状态指数和相对强芽生长量差异显著。采用隶属函数和聚类分析的方法进行耐盐性综合评价,将63份种质资源划分为五大类:特耐盐种质材料2份,强耐盐种质材料10份,中度耐盐种质材料31份,盐敏感种质材料15份,盐高敏感种质材料5份。台湾青皮和鹰角亭1号表现为特耐盐,盐高敏感材料为永清6号、黄鲁自交-B1、黄鲁、胜利自交B1和滕桑。同时对测试指标与平均隶属函数进行相关性分析发现,芽萌发状态指数及相对强芽生长量可作为桑树耐盐性鉴定的评价指标。 展开更多
关键词 桑树 耐盐性 隶属函数
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桑根皮活性成分桑辛素通过下调STAT3表达减轻力竭运动诱导的肾损伤
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作者 姜敬敏 《分子植物育种》 北大核心 2025年第21期7278-7285,共8页
桑(Morus alba L.)为桑科重要药用植物,其根皮(桑根皮)富含黄酮、酚类等活性成分,具有抗炎、抗氧化等多种药理效应。桑辛素(morusin)为其代表性黄酮类成分,尚未明确其在运动性肾损伤中的作用。本研究探讨桑辛素对力竭运动诱导小鼠肾损... 桑(Morus alba L.)为桑科重要药用植物,其根皮(桑根皮)富含黄酮、酚类等活性成分,具有抗炎、抗氧化等多种药理效应。桑辛素(morusin)为其代表性黄酮类成分,尚未明确其在运动性肾损伤中的作用。本研究探讨桑辛素对力竭运动诱导小鼠肾损伤的保护作用及机制。采用负重游泳法建立模型,分别给予不同剂量桑辛素,并联合STAT3激动剂C-TFA干预。结果显示,桑辛素可剂量依赖性降低Cr、BUN、NGAL、KIM-1水平,改善肾组织损伤,抑制STAT3磷酸化,降低促炎因子和氧化应激水平,调节Bcl-2/Bax表达,减少细胞凋亡,STAT3激动剂干预显著削弱桑辛素效应。结果表明,桑辛素通过靶向STAT3通路显著减轻运动性肾损伤,具有作为天然运动防护剂的潜力。 展开更多
关键词 桑辛素 STAT3磷酸化 力竭运动 肾损伤 天然药物
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广西喀斯特地区五个桑树品种叶功能性状及其抗旱性评价
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作者 覃兰丽 陈观榕 +5 位作者 李燕婷 谢彦军 李晓东 黄康东 文柳璎 史沉鱼 《广西植物》 北大核心 2025年第6期1060-1070,共11页
为筛选出适合广西喀斯特地区种植的抗旱性强的桑树品种,该研究以环江地区‘桂桑5号’‘桂桑6号’‘桂桑优12’‘农桑14号’和‘育711号’5个桑树品种作为试验材料,通过测定叶绿素、渗透调节物质、花青素、丙二醛、抗氧化酶活性及导管直... 为筛选出适合广西喀斯特地区种植的抗旱性强的桑树品种,该研究以环江地区‘桂桑5号’‘桂桑6号’‘桂桑优12’‘农桑14号’和‘育711号’5个桑树品种作为试验材料,通过测定叶绿素、渗透调节物质、花青素、丙二醛、抗氧化酶活性及导管直径、导管加固系数、叶片厚度、上下表皮厚度、栅栏组织厚度、海绵组织厚度、气孔大小、气孔密度等24个叶功能性状指标,利用主成分分析、隶属函数分析和聚类分析,筛选出与抗旱性相关的叶功能性状指标及抗旱性较强的品种。结果表明:(1)主成分分析表明,与抗旱性相关的主要叶功能性状指标为叶绿素a、叶绿素b、总叶绿素、类胡萝卜素、丙二醛、超氧化物歧化酶活性、气孔大小、气孔密度、导管加固系数和海绵组织厚度。(2)根据隶属函数分析,5个桑树品种的抗旱性排名为‘农桑14号’>‘桂桑优12’>‘桂桑5号’>‘桂桑6号’>‘育711号’;进一步的聚类分析结果表明,‘农桑14号’‘桂桑优12’和‘桂桑5号’成为一类,‘桂桑6号’和‘育711号’组成另一类;两种分析结果相一致。(3)‘农桑14号’‘桂桑优12’和‘桂桑5号’表现出更好的抗旱性,与它们具有更为高效的生理调节机制和优化的解剖结构有关。该研究结果为广西喀斯特地区桑树抗旱品种的筛选提供了科学依据和理论参考。 展开更多
关键词 喀斯特地区 桑树 叶功能性状 隶属函数 聚类分析 抗旱性
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桑叶中的黄酮类化合物 被引量:43
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作者 杨燕 王洪庆 陈若芸 《药学学报》 CAS CSCD 北大核心 2010年第1期77-81,共5页
为了研究桑叶的化学成分与生物活性之间的相关性,采用硅胶、Sephadex LH-20、RP-C18等色谱方法分离纯化,通过核磁共振谱、质谱等波谱分析手段鉴定化合物结构。从长穗桑的95%乙醇提取物中分离到4个Diels-Alder类加合物,分别鉴定为mulberr... 为了研究桑叶的化学成分与生物活性之间的相关性,采用硅胶、Sephadex LH-20、RP-C18等色谱方法分离纯化,通过核磁共振谱、质谱等波谱分析手段鉴定化合物结构。从长穗桑的95%乙醇提取物中分离到4个Diels-Alder类加合物,分别鉴定为mulberrofuran F1(1)、mulberrofuran F(2)、chalcomoracin(3)和kuwanon J(4);2个查耳酮类化合物,鉴定为morachalcone A(5)和isobavachalcone(6);3个黄酮类化合物,鉴定为norartocarpetin(7)、kuwanonC(8)和6-geranylapigenin(9)。化合物1和6为首次从该种植物中分离,化合物4~5、7~9为首次从桑叶中分离得到,其中化合物1为新化合物。采用MTT法对化合物1~5进行了抗肿瘤活性筛选,结果显示化合物1~3对人肿瘤细胞A549、Bel7402、BGC823、HCT-8以及A2780具有抑制作用。 展开更多
关键词 桑属 桑叶 抗肿瘤活性 黄酮类化合物
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不同供氮水平对饲料桑树幼苗生长以及光合特性的影响 被引量:24
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作者 许楠 倪红伟 +4 位作者 钟海秀 沙威 伍一宁 刑军会 孙广玉 《江苏农业学报》 CSCD 北大核心 2015年第4期865-870,共6页
为科学制定饲料桑树幼苗氮肥管理措施,在水培条件下以青龙桑为试验材料,设置4个供氮水平(每株0 mg、7.5 mg、15.0 mg和22.5 mg),探求不同供氮水平对桑树幼苗生长及生理特性的影响。结果表明,桑树幼苗株高、地径、叶片数量、叶面积、根... 为科学制定饲料桑树幼苗氮肥管理措施,在水培条件下以青龙桑为试验材料,设置4个供氮水平(每株0 mg、7.5 mg、15.0 mg和22.5 mg),探求不同供氮水平对桑树幼苗生长及生理特性的影响。结果表明,桑树幼苗株高、地径、叶片数量、叶面积、根长、生物量、叶片净光合速率(Pn)、气孔导度(Gs)、水分利用率(WUE)、蒸腾速率(Tr)均随施氮量的增加而呈现先升高后降低的趋势,根冠比随着施氮量的增加逐渐降低,其中每株施15 mg氮处理的桑树幼苗长势最好;此外,桑树幼苗的叶绿素含量、PSII最大光化学量子产量(Fv/Fm)、光化学猝灭系数(qp)、PSII实际光化学效率(ΦPSⅡ)、电子传递速率(ETR)均随施氮量的增加而升高,非光化学猝灭系数(NPQ)随着施氮量的增加而降低。适宜的供氮量可以增强桑树叶绿体光化学活性和光合能力,并且促进桑树的生长,而过高的供氮水平对其促进效应降低。 展开更多
关键词 桑树 施氮量 叶片产量 光合特性
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桑叶多糖的含量测定 被引量:32
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作者 欧阳臻 李永辉 +1 位作者 宿树兰 陈钧 《食品科学》 EI CAS CSCD 北大核心 2003年第11期118-120,共3页
用蒽酮-硫酸比色法测定了桑叶中多糖的含量。测定波长620nm,多糖换算因子f=3.07;在10~60μg/ml范围内吸收度与被测物含量呈良好的线性关系,r=0.999005;多糖的平均回收率为98.81%,RSD为2.08%(n=5)。测定结果表明,10月份桑叶中多糖含量... 用蒽酮-硫酸比色法测定了桑叶中多糖的含量。测定波长620nm,多糖换算因子f=3.07;在10~60μg/ml范围内吸收度与被测物含量呈良好的线性关系,r=0.999005;多糖的平均回收率为98.81%,RSD为2.08%(n=5)。测定结果表明,10月份桑叶中多糖含量最高。本法简便、准确、重现性好,可作为桑叶中多糖的含量测定方法。 展开更多
关键词 蒽酮-硫酸比色法 桑叶 多糖 测定方法 中药
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