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Standardized bioactive fraction of Phaleria macrocarpa(Proliverenol) prevents ethanol-induced hepatotoxicity via down-regulation of NF-kB-TNFα-caspase-8 pathway 被引量:2
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作者 Guntur Berlian Olivia Mayasari Tandrasasmita Raymond Rubianto Tjandrawinata 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2016年第8期686-691,共6页
Objective: To verify that Proliverenol has a potential ability in protecting cells from ethanol-induced hepatotoxicity.Methods: Activity of Proliverenol against ethanol-induced apoptosis was evaluated at m RNA and pro... Objective: To verify that Proliverenol has a potential ability in protecting cells from ethanol-induced hepatotoxicity.Methods: Activity of Proliverenol against ethanol-induced apoptosis was evaluated at m RNA and protein levels in Hep G2 cell exposed to Proliverenol for 1 and 3 h.Results: Proliverenol conferred hepatoprotective activity through increasing cell survival up to 53%–69% via up-regulation of APEX1 DNA repair enzyme for 3.0–4.7 fold and down-regulating of nuclear factor-kB, tumor necrosis factora and caspase-8 expression,allowing them to prevent 4.5–6.9 fold of alanine aminotransferase(ALT) leakage in Hep G2 cells. Our finding revealed that Proliverenol repressed expression of ALT, which is significantly important as possible alternative mechanism for increased blood transaminase activities. In addition, the result also showed that caspase-8 pathway seemed to be involved in the molecular pathway rather than directly inducing mitochondrial damage.Conclusions: The data support our hypothesis that Proliverenol has a potential ability in protecting cells from ethanol-induced hepatotoxicity. We propose that Proliverenol provides hepatoprotective activity through up-regulating expression of APEX1 that repress DNA fragmentation, and down-regulating expression of nuclear factor-kB, tumor necrosis factora and caspase-8, which therefore repress ALT leakage and its expression. 展开更多
关键词 Phaleria macrocarpa Hepatoprotector Liver injury CIRRHOSIS HepG2
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Potential Technological Use of Reserves of <i>Jatropha curcas</i>and <i>J. macrocarpa</i>Griseb. Seeds 被引量:2
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作者 Nancy E. de las M. Tavecchio Marta S. Dardanelli +4 位作者 Yanina B. Reguera Herminda E. Reinoso Oscar A. Terenti Marisa M. Garbero Hilda E. Pedranzani 《American Journal of Plant Sciences》 2019年第8期1444-1456,共13页
J. curcas and J. macrocarpa are useful for restoring degraded areas and their seeds contain oils for biodiesel production. The aim of the work was to determine the reserve substances in the endosperm and the embryo of... J. curcas and J. macrocarpa are useful for restoring degraded areas and their seeds contain oils for biodiesel production. The aim of the work was to determine the reserve substances in the endosperm and the embryo of J. curcas and J. macrocarpa which is important in understanding the germination process, the establishment of these species and its industrial employment. Seeds were imbibed in distilled water for 24 h, to facilitate removal of seed coat with the aim to separate the embryo and nutritive tissues. In both species, the endosperm contained aleurone grains consisting of a crystalloid and globoid, lipids of red color and the starch was not observed. Four major fatty acids were determined in J. curcas seed: oleic, palmitic, stearic, palmitoleic and oleic fatty acid represents about 70% oil content. Oleic acid was the most abundant in J. macrocarpa seeds, while, there was not palmitoleic acid. Seed with predominantly unsaturated fatty acids is ideal for biodiesel industry. The means of the sugar content were: 14.3 μg/mg in endosperm and 104.76 μg/mg in embryo of J. curcas and 6.48 μg/mg in endosperm and 59.20 μg/mg in embryo of J. macrocarpa. The means of the protein content were: 4.2 μg/mg in endosperm and 45.02 μg/mg in embryo of J. curcas and 3.26 μg/mg in endosperm and 31.08 μg/mg in embryo of J. macrocarpa. Sugar and protein contents of Jatropha seeds were significantly higher in embryo in both species (p 0.1), which suggests early mobilization towards the embryo during imbibition period. 展开更多
关键词 Fatty Acids J. curcas J. macrocarpa Proteins SEEDS Sugars
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Production of secondary metabolite E2.2 from Phaleria macrocarpa endophytic fungus
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作者 Beatrix Trikurnia Gasong Raymond Rubianto Tjandrawinata 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2016年第10期881-885,共5页
Objective: To isolate new endophytic fungus from Phaleria macrocarpa(P. macrocarpa)that is able to produce E2.2 compound.Methods: Endophytic fungi were isolated from P. macrocarpa. Morphological and molecular identifi... Objective: To isolate new endophytic fungus from Phaleria macrocarpa(P. macrocarpa)that is able to produce E2.2 compound.Methods: Endophytic fungi were isolated from P. macrocarpa. Morphological and molecular identification was done to determine the species of the endophytic fungus.High performance liquid chromatography was used to determine the ability of this fungus to produce E2.2 compound and to quantify the total yield of E2.2 from fungal fermentation. Fermentation process was optimized by observing suitable medium, p H and length of fermentation process. Phloroglucinol and gallic acid addition were examined to determine the effect of each compound on E2.2 production.Results: One endophytic fungus was successfully isolated from P. macrocarpa plant.Morphological and molecular identification showed that it was a Colletotrichum gloeosporioides which belonged to Glomerellaceae family. This fungus showed highest production of E2.2 when incubated in potato dextrose broth with initial p H value of the medium at 5, and was incubated for 15 days. Phloroglucinol was found to better enhance E2.2 production.Conclusions: Colletotrichum gloeosporioides found in P. macrocarpa plant is promising as a potential alternative source of E2.2. 展开更多
关键词 ENDOPHYTIC FUNGI Phaleria macrocarpa SECONDARY METABOLITE COLLETOTRICHUM gloeosporioides E2.2
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Evaluation of L-dopa,proximate composition with in vitro anti-inflammatory and antioxidant activity of Mucuna macrocarpa beans:A future drug for Parkinson treatment
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作者 Chetan Aware Ravishankar Patil +3 位作者 Swaroopsingh Gaikwad Shrirang Yadav Vishwas Bapat Jyoti Jadhav 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2017年第12期1097-1106,共10页
Objective: To investigate L-3, 4-dihydroxyphenylalanine(L-dopa, anti-Parkinson drug),anti-inflammatory activity, proximate nutritional composition and antioxidant potential of Mucuna macrocarpa(M. macrocarpa) beans.Me... Objective: To investigate L-3, 4-dihydroxyphenylalanine(L-dopa, anti-Parkinson drug),anti-inflammatory activity, proximate nutritional composition and antioxidant potential of Mucuna macrocarpa(M. macrocarpa) beans.Methods: L-dopa content was determined and quantified by high performance thin layer chromatography and reversed phase high-performance liquid chromatography(RPHPLC) methods. Anti-inflammatory activity was performed by in vitro protein denaturation inhibition and human red blood cell membrane stabilisation activity. Proximate composition and elemental analysis were also investigated. The antioxidant potential(2,2-diphenyl-1-picrylhydrazyl, N-N-dimethyl-phenylenediamine and ferric-reducing antioxidant power) of M. macrocarpa beans were evaluated by using different extraction solvents. The RP-HPLC analysis also quantified significant phenolics such as gallic acid, tannic acid, p-hydroxybenzoic acid and p-coumaric acid.Results: RP-HPLC quantification revealed that M. macrocarpa beans contain a high level of L-dopa [(115.41 ± 0.985) mg/g] which was the highest among the Mucuna species from Indian sub-continent. Water extract of seed powder showed strong antiinflammatory and antioxidant potential. Proximate composition of M. macrocarpa beans revealed numerous nutritional and anti-nutritional components. RP-HPLC analysis of major phenolics such as tannic acid(43.795 mg/g), gallic acid(0.864 mg/g), p-coumaric acid(0.364 mg/g) and p-hydroxybenzoic acid(0.036 mg/g) quantified successfully from M. macrocarpa beans respectively.Conclusions: This study suggests that M. macrocarpa is a potential source of L-dopa with promising anti-inflammatory, antioxidant and nutritional benefits. 展开更多
关键词 ANTI-INFLAMMATORY Antioxidants L-DOPA Mucuna macrocarpa Oxidative stress Parkinson’s disease
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Inhibition of Mahkota Dewa(Phaleria macrocarpa) bioactive fraction on proliferation of human retinoblastoma tumor cells Y-79 through suppression of mRNA level of cyclin E
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作者 Nugroho Trilaksana Ignatius Riwanto +1 位作者 Raymond Rubianto Tjandrawinata Reki Winarto 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2017年第4期280-287,共8页
Objective: To prove the molecular mechanisms of Mahkota Dewa(Phaleria macrocarpa) in suppressing proliferation of human retinoblastoma cells through suppression of cell cycle's gene-regulators expression.Methods: ... Objective: To prove the molecular mechanisms of Mahkota Dewa(Phaleria macrocarpa) in suppressing proliferation of human retinoblastoma cells through suppression of cell cycle's gene-regulators expression.Methods: In this study, the molecular mechanism of anti-tumor effect of fractioned extract of Phaleria macrocarpa(DLBS1425) in human retinoblastoma cells Y-79 was investigated by measuring the tumor cells viability, the assessment of population profiles of tumor cells in the cell cycle, and the mRNA concentration of p16, p21, p53, cyclin D,cyclin E, and E2 F.Results: DLBS1425 showed an inhibition effects towards proliferation of Y-79 cell line.Inhibition of proliferation was shown by suppression of cell cycle progression.DLBS1425 downregulated cyclin E, a G1 phase regulator gene of cell cycle, in dosedependent manner without affecting p53–p21 pathway.In the other word, DLBS1425 inhibits cell proliferation through suppression of cyclin E independently towards conventional proliferation pathway.Conclusions: Our results suggest that DLBS1425 is a potential anticancer agent which targets genes involved in cell proliferation in human retinoblastoma cells which make it pharmacologically ideal for the prevention and/or treatment of retinoblastoma cancer. 展开更多
关键词 Phaleria macrocarpa Mahkota Dewa DLBS1425 RETINOBLASTOMA Cyclin E Cell cycle
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Isolation and identification of compounds from Phaleria macrocarpa(Scheff.) Boerl fruit extract
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作者 Emanuel Dani Ramdani Ujiatmi Dwi Marlupi +1 位作者 James Sinambela Raymond Rubianto Tjandrawinata 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2017年第4期300-305,共6页
Objective: To identify and isolate the chemical compounds of Phaleria macrocarpa(P.macrocarpa) fruit ethanolic extract.Methods: Dried fruit of P.macrocarpa was extracted with 90% ethanol and partitioned between n-hexa... Objective: To identify and isolate the chemical compounds of Phaleria macrocarpa(P.macrocarpa) fruit ethanolic extract.Methods: Dried fruit of P.macrocarpa was extracted with 90% ethanol and partitioned between n-hexane/H_2O and ethyl acetate/H_2O.The organic layer was fractionated by various stationary phase and identified by using combined data of 1D [(proton nuclear magnetic resonance(NMR), carbon-13 NMR)], 2D-NMR(heteronuclear multiplequantum correlation and heteronuclear multiple-bond correlation), and mass spectrum.Results: Purification of n-hexane and ethyl acetate fractions from ethanolic extract of P.macrocarpa fruit resulted in isolation of nine compounds.Conclusions: A new compound was isolated and identified as glyceryl pentacosanoate.Also, two xanthones, which are 1,7-dihydroxy-3,6-dimethoxyxanthone and 1,6,7-trihydroxy-3-methoxyxanthone, are firstly reported to be isolated from P.macrocarpa. 展开更多
关键词 Phaleria macrocarpa Glyceryl pentacosanoate 1 7-Dihydroxy-3 6-dimethoxyxanthone 1 6 7-Trihydroxy-3-methoxyxanthone
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Comparison of solvents for extraction of Pachira macrocarpa(Cham.et Schlecht.)Walp seed oils
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作者 Wenhui Zhang Xixiang Shuai +5 位作者 Taotao Dai Lizhen Deng Ruihong Liang Chengmei Liu Jun Chen Mingshun Chen 《Food Bioscience》 SCIE 2023年第1期464-471,共8页
This study compared the lipid yield,chemical composition,thermal and rheological behavior of Pachira macrocarpa seed oil(PSO)extracted with five different solvents(petroleum ether,n-hexane,ethyl acetate,isopropanol an... This study compared the lipid yield,chemical composition,thermal and rheological behavior of Pachira macrocarpa seed oil(PSO)extracted with five different solvents(petroleum ether,n-hexane,ethyl acetate,isopropanol and Folch solution(methanol/chloroform,v/v=1:2)).The results showed that the lipid yield of PSO extracted with ethyl acetate was the highest(29.25%).The main fatty acids of PSOs extracted by different solvents were palmitic acid(48.82-49.24%),linoleic acid(31.23-31.62%)and oleic acid(13.88-14.26%).Ethyl acetate was the most suitable solvent for extracting phytosterols(1756.43 mg/kg),n-hexane was the best solvent for enriching squalene(906.50 mg/kg),and isopropanol extraction was the most suitable for enriching tocopherols(436.90 mg/kg).Folch solution extraction can efficiently extract polyphenols and its oil had the best oxidative stability in all samples.Furthermore,PSOs showed high thermal stability and exhibited Newtonian flow behavior.Overall,this study provides guidance for the industrial production of PSO,and Folch solution extraction was the most suitable method for the development of PSO for the potential healthcare application. 展开更多
关键词 Pachira macrocarpa seed oil SOLVENT Chemical composition Thermal behavior Rheological behavior Application
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Phytochemical and toxicity evaluation of Phaleria macrocarpa(Scheff.)Boerl by MCF-7 cell line and brine shrimp lethality bioassay
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作者 Abul Kalam Azad Wan Mohd Azizi Wan Sulaiman Nushrat Khan Sunzida 《Journal of Coastal Life Medicine》 2016年第1期45-49,共5页
Objective:To evaluate the cytotoxicity of Phaleria macrocarpa fruits extracts.Methods:The cytotoxicity test was carried out by in vitro MCF-7 cell line and in vivo brine shrimp lethality bioassay.Results:The prelimina... Objective:To evaluate the cytotoxicity of Phaleria macrocarpa fruits extracts.Methods:The cytotoxicity test was carried out by in vitro MCF-7 cell line and in vivo brine shrimp lethality bioassay.Results:The preliminary phytochemical test showed the presence of alkaloids,carbohydrate,glycosides,saponin,terpene,steroids,phenols and flavonoids.The MTT-assay results showed that the highest percentage of cell viability was 106.23%at concentration of 1.25μL and the lowest percentage was 13.04%at concentration of 10μL.Conclusions:The MTT-assay and brine shrimp lethality bioassay results showed that the extract was non-toxic and it would be consumable as a herbal remedy. 展开更多
关键词 MCF-7 Phaleria macrocarpa Brine shrimp lethality bioassay TOXICITY
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西双版纳国家级自然保护区勐养子保护区藤枣分布及保育研究
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作者 李金荣 杨东军 +1 位作者 梁姣 刘浪 《林业建设》 2025年第3期70-74,共5页
通过文献查阅、走访调查及实地调查的方式,对西双版纳勐养子保护区内47条样线进行藤枣分布调查,并对藤枣生长的土壤理化性质以及藤枣的保育方式开展研究。结果表明:47条样线中共有7个地点发现7个种群122株藤枣,7个样点土壤有机质含量均... 通过文献查阅、走访调查及实地调查的方式,对西双版纳勐养子保护区内47条样线进行藤枣分布调查,并对藤枣生长的土壤理化性质以及藤枣的保育方式开展研究。结果表明:47条样线中共有7个地点发现7个种群122株藤枣,7个样点土壤有机质含量均较高,pH值均为弱酸性,pH范围在4.89~6.44之间,其中5个样点土壤有机质含量均在20 g/kg以上,藤枣喜在土壤有机质含量较高且呈弱酸性土壤环境中生长。大荒坝南木河土壤中氮磷钾总量最高,为26.17 g/kg,昆罕小寨最低,为7.0420 g/kg,土壤中氮磷钾总量对藤枣分布数量并无直接关系。新鲜水苔做为基质的扦插繁育中获得5株成活株,成活率为12%。 展开更多
关键词 藤枣 西双版纳国家级自然保护区勐养子保护区 极小种群物种 植物分布 植物保育
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不同处理方式对大果栎种子发芽及幼苗生长的影响 被引量:3
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作者 杨志莹 张小羽 +3 位作者 张海良 赵庆柱 庄德祥 郝炎辉 《园艺与种苗》 CAS 2024年第10期64-65,共2页
[目的]研究大果栎种子的发芽情况,筛选出最佳的催芽方式。[方法]采用不同处理方式对大果栎种子进行催芽处理,比较其发芽率、发芽势及播种后幼苗的生长情况。[结果]通过对大果栎种子进行不同处理后发现,秋季采收的种子不进行储存,直接在2... [目的]研究大果栎种子的发芽情况,筛选出最佳的催芽方式。[方法]采用不同处理方式对大果栎种子进行催芽处理,比较其发芽率、发芽势及播种后幼苗的生长情况。[结果]通过对大果栎种子进行不同处理后发现,秋季采收的种子不进行储存,直接在25℃环境下进行播种时,种子发芽率达到83.33%,说明大果栎种子可以不经过春化处理直接播种;经过低温春化后可以提高种子发芽率;在栎树种子储存时需做好保水措施,以确保种子质量。[结论]栎树种子低温沙藏后发芽效果最好,但实际生产中也可根据需要选择采后不经储存直接播种或是密封袋低温储藏的方式进行催芽处理。 展开更多
关键词 大果栎 种子 发芽
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自然发酵青金桔中酵母菌的分离鉴定及其特性研究 被引量:2
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作者 马泽威 张红建 +3 位作者 刘帅光 李荣丽 黄欢 郑联合 《中国酿造》 CAS 北大核心 2024年第6期115-120,共6页
为寻找适宜青金桔(Citrus microcarpa)全果浆高酸环境条件下发酵的酵母菌,采用传统分离、纯化方法从青金桔全果浆自然发酵液中筛选酵母菌,通过形态学观察结合ITS测序对分离菌种进行鉴定,并评价其生长性能及对温度、pH和葡萄糖浓度的耐... 为寻找适宜青金桔(Citrus microcarpa)全果浆高酸环境条件下发酵的酵母菌,采用传统分离、纯化方法从青金桔全果浆自然发酵液中筛选酵母菌,通过形态学观察结合ITS测序对分离菌种进行鉴定,并评价其生长性能及对温度、pH和葡萄糖浓度的耐受性。对比分离菌株纯种发酵前后青金桔全果浆总酚、总黄酮、α-葡萄糖苷酶抑制率及抗氧化活性的变化,考察分离菌株的发酵特性。结果表明,从自然发酵青金桔全果浆中共分离得到3株酵母菌Y1、Y14和Y15。菌株Y1被鉴定为特立科拉毕赤酵母(Pichia terricola),菌株Y14、Y15均被鉴定为仙人掌有孢汉逊酵母(Hanseniaspora opuntiae)。酵母菌Y1、Y14和Y15均能耐受35℃、400 g/L葡萄糖和p H 2.0的环境条件。利用菌株Y1、Y14和Y15纯种发酵青金桔全果浆总酚、总黄酮、DPPH自由基清除率、ABTS自由基清除率、铜离子还原能力、α-葡萄糖苷酶抑制率分别提高20.65%、87.15%、20.45%、43.94%、34.08%、20.34%;19.22%、51.90%、18.31%、39.39%、25.94%、24.82%;19.97%、70.01%、22.92%、34.85%、30.85%、13.53%。 展开更多
关键词 青金桔 自然发酵 酵母菌 分离鉴定 耐受性 发酵特性
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蒙古黄榆果实制备中药芜荑的发酵真菌菌种的分离与鉴定
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作者 何复华 包海鹰 《菌物研究》 CAS CSCD 2024年第2期183-190,共8页
为探明制备传统中药芜荑的发酵菌种,对芜荑的发酵基质蒙古黄榆Ulmus macrocarpa Hance var.mongolica的果实内生菌和自然发酵后的菌株进行分离纯化,并采用显微形态特征和序列分析方法进行鉴定;采用Illumina Miseq?/Hiseq高通量测序技术... 为探明制备传统中药芜荑的发酵菌种,对芜荑的发酵基质蒙古黄榆Ulmus macrocarpa Hance var.mongolica的果实内生菌和自然发酵后的菌株进行分离纯化,并采用显微形态特征和序列分析方法进行鉴定;采用Illumina Miseq?/Hiseq高通量测序技术,对通过有氧发酵和无氧发酵2种方式获得的果实自然发酵产物的真菌群落结构和多样性,进行形态学与内转录间隔区(ITS)、β-微管蛋白基因(BenA)和钙调蛋白基因(CaM)的序列联合分析。结果显示,从蒙古黄榆果实中分离鉴定出米曲霉Aspergillus oryzae、黄曲霉A.flavus和烟曲霉A.fumigatus 3种内生真菌;自然发酵的蒙古黄榆果实中鉴定出有氧发酵真菌属水平构成为:青霉属Penicillium(42.9%)、曲霉属Aspergillus(30.8%)、小穴壳菌属Dothiorella(24.9%)及其他真菌(1.4%);无氧发酵真菌属水平构成为:根霉属Rhizopus(55.7%)、Penicillium(24.4%)、Dothiorella(12%)及其他真菌(7.9%)。自然发酵果实中分离鉴定出优势真菌6种:米曲霉A.oryzae,黄曲霉A.flavus,灰带蓝曲霉A.glacus,亚曲霉A.subramaninii,米根霉R.oryzae,产黄青霉菌P.chrysogenum。蒙古黄榆果实内生真菌在2种发酵方式中均起到重要作用,从菌种方面为中药芜荑的规范化发酵制备提供了研究基础。 展开更多
关键词 蒙古黄榆 发酵 菌种 BenA基因 CaM基因
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滇西北海拔上限大果红杉径向生长对气候变化的响应 被引量:21
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作者 张贇 尹定财 +4 位作者 田昆 肖德荣 孙梅 王行 张卫国 《应用生态学报》 CAS CSCD 北大核心 2017年第9期2805-2812,共8页
基于树轮年代学方法,利用玉龙雪山、哈巴雪山和普达措国家公园海拔上限大果红杉树轮宽度资料,分别建立3个样点大果红杉的差值年表(RES),研究其径向生长对气候响应的异同,探讨影响滇西北大果红杉生长的关键气候因子.结果表明:生长季初期(... 基于树轮年代学方法,利用玉龙雪山、哈巴雪山和普达措国家公园海拔上限大果红杉树轮宽度资料,分别建立3个样点大果红杉的差值年表(RES),研究其径向生长对气候响应的异同,探讨影响滇西北大果红杉生长的关键气候因子.结果表明:生长季初期(5月和6月)温度是影响滇西北大果红杉生长的主要因子,与3个样点的径向生长表现出显著正相关关系,同时普达措国家公园大果红杉还受生长季以前温度的影响,分别与上年7月和11月温度呈显著负相关和显著正相关;3个样点大果红杉生长对降水的响应存在差异,随着纬度升高主要由负相关转为正相关,大果红杉径向生长与降水的关系在玉龙雪山(纬度梯度最南)主要表现为与生长季初期降水量呈显著负相关,在哈巴雪山(纬度梯度中部)表现为与9月降水量呈显著负相关,在普达措国家公园(纬度梯度最北)表现为与3月降水量呈显著正相关.另外,7月降水的增多有利于玉龙雪山大果红杉的生长.基于气候模型预测,综合大果红杉对温度和降水响应模式与响应程度分析,未来气候变化有利于滇西北高原大果红杉的径向生长. 展开更多
关键词 大果红杉 树木年轮 气候响应 海拔分布上限 滇西北高原
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大果冬青种子的休眠与萌发初探 被引量:28
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作者 徐本美 史晓华 +1 位作者 孙运涛 黎念林 《种子》 CSCD 北大核心 2002年第3期1-2,5,共3页
大果冬青的种壳占种子风干重的 75 % ,种子透水性良好。浓硫酸处理 1.5小时后 ,可使种壳减轻 32 .6 %。酸蚀处理增强了种子的透气性并减轻了种壳的机械束缚力。添加 2 5 0 mg· L- 1 +0 .2 % KNO3溶液 ,经过一个冬天层积后 ,发芽率... 大果冬青的种壳占种子风干重的 75 % ,种子透水性良好。浓硫酸处理 1.5小时后 ,可使种壳减轻 32 .6 %。酸蚀处理增强了种子的透气性并减轻了种壳的机械束缚力。添加 2 5 0 mg· L- 1 +0 .2 % KNO3溶液 ,经过一个冬天层积后 ,发芽率可达17.1% 。 展开更多
关键词 大果冬青 种子 休眠 萌发 硫酸处理 冷层积 GA3
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瓜栗病原真菌的鉴定 被引量:13
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作者 习平根 戚佩坤 姜子德 《华南农业大学学报》 CAS CSCD 北大核心 2000年第4期30-32,共3页
鉴定了广州地区瓜栗 [Pachiramacrocarpa (Cham .et.Schlecht.)Walp .]上 8种病原真菌 ,即大果拟茎点霉 (Pho mopsismacrocarpaeP .G .Xi,Z .D .JiangetP .K .Chisp .nov .)、榴莲拟茎点霉 (PhomopsisdurionisH .Syd .)、可可球二孢 (Bo... 鉴定了广州地区瓜栗 [Pachiramacrocarpa (Cham .et.Schlecht.)Walp .]上 8种病原真菌 ,即大果拟茎点霉 (Pho mopsismacrocarpaeP .G .Xi,Z .D .JiangetP .K .Chisp .nov .)、榴莲拟茎点霉 (PhomopsisdurionisH .Syd .)、可可球二孢 (BotryodiplodiatheobromaePat.)、胶孢刺盘孢 [Colletotrichumgloeosporioides (Penz.)Sacc .]、木止木拟盘多毛孢[Pestalotiopsisgracilis (Kleb .)Stey .]、粉红聚端孢 (TrichotheciumroseumLk .exFr.)、新月弯孢霉 [Curvularialunata(Walk .)Boed .]和细极链格孢 [Alternariatenuissima (Fr.)Wiltsh .],其中榴莲拟茎点霉引起的叶斑病和可可球二孢引起的茎枯病在生产上为害较重 展开更多
关键词 瓜栗 病原真菌 种类鉴定 大果拟茎点霉
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HPLC法测定藜豆中左旋多巴的含量 被引量:10
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作者 黄海滨 苏健 谭叶憧 《广西植物》 CAS CSCD 北大核心 2004年第5期460-462,共3页
采用HPLC法建立测定藜豆中左旋多巴含量的方法。色谱柱为岛津C-18甲基硅烷柱(250 min×4.6mm,5μm),流动相为甲醇:0.1 mol/L醋酸溶液(25:75,v/v),以硫唑嘌呤为内标物,检测波长280 nm,流速1.0 mL/min,柱温为室温,供试品的前处理... 采用HPLC法建立测定藜豆中左旋多巴含量的方法。色谱柱为岛津C-18甲基硅烷柱(250 min×4.6mm,5μm),流动相为甲醇:0.1 mol/L醋酸溶液(25:75,v/v),以硫唑嘌呤为内标物,检测波长280 nm,流速1.0 mL/min,柱温为室温,供试品的前处理方法为微波辅助提取法。结果表明,该方法准确度高,线性关系好,重现性好,平均加样回收率为97.34%,RSD 1.01%(n=5),结果满意。 展开更多
关键词 左旋多巴 HPLC法 含量 供试品 硫唑嘌呤 RSD 检测波长 前处理方法 微波辅助提取法 重现性
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濒危植物藤枣的生境与种群结构特征 被引量:10
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作者 刘万德 苏建荣 +4 位作者 徐崇华 王发忠 郎学东 李智宏 李帅锋 《林业科学研究》 CSCD 北大核心 2017年第1期137-144,共8页
[目的]探索藤枣生境及其种群数量、分布、结构及更新等特征。[方法]在藤枣主要分布地设置5块20 m×20m的调查样地,记录样地中所有胸径(DBH)≥1 cm的植物的物种名称、高度、胸径、及样地的郁闭度、海拔、坡度、裸岩覆盖率、距河流距... [目的]探索藤枣生境及其种群数量、分布、结构及更新等特征。[方法]在藤枣主要分布地设置5块20 m×20m的调查样地,记录样地中所有胸径(DBH)≥1 cm的植物的物种名称、高度、胸径、及样地的郁闭度、海拔、坡度、裸岩覆盖率、距河流距离、土壤等环境因子,同时在样地中调查藤枣种群特征,分析藤枣藤枣生境地的林分因子、群落特征、生境特征及种群数量与更新。[结果]表明:藤枣生境地林分平均高、平均胸径、平均胸高断面积、林分密度分别为11.98 m、15.13 cm、41.42 m2·hm-2和1 205株·hm-2。群落平均物种丰富度为35.2,群落类型为热带雨林和季风常绿阔叶林;在大小级结构上,不同高度级和径级内物种丰富度和个体多度均呈单峰曲线,最高值均出现在第Ⅱ高度级和径级内,但第Ⅴ(H≥30 m)高度级和第Ⅵ(DBH≥100 cm)径级均有物种和个体分布。藤枣生境地平均海拔高度为1 107 m,坡度为陡坡,坡向则多数为阴坡,处坡下位置;林分郁闭度仅为76%,但距河流较近(31 m),并伴有一定的裸露岩石;土壤接近中性(p H=6.2),养分条件较好。在5块调查样地(面积20 m×20 m)中,共有藤枣28株,分布于19个样方,多数为单方单株分布。28株藤枣平均长度2.39 m,平均基径仅为0.74 cm,平均胸径为0.41 cm。其中,更新幼苗(H<33 cm)为3株,占藤枣总株数的10.71%。[结论]藤枣分布地植物群落类型主要为热带雨林和季风常绿阔叶林,树木较高,树体较大,单峰曲线是其物种丰富度和个体多度在不同高度级和径级内的分布形式。生境地环境以高温高湿为主,土壤养分条件较好。28株藤枣分布于19个样方,多数为单方单株分布。藤枣幼苗数量较少,自然更新受限。 展开更多
关键词 林分因子 群落特征 生境特征 更新 藤枣
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马拉巴栗种子发育中可溶性糖变化与种子脱水耐性的关系 被引量:8
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作者 李永红 马颖敏 +1 位作者 许柏球 赵梁军 《中国农业科学》 CAS CSCD 北大核心 2009年第8期2882-2891,共10页
【目的】探索马拉巴栗种子在发育过程中脱水耐性的形成与可溶性糖之间的关系。【方法】以不同发育阶段的马拉巴栗种子和离体胚为试材,观测种子发育过程中可溶性糖组分和含量以及种子和离体胚的脱水耐性变化。【结果】开花后30~70d是种... 【目的】探索马拉巴栗种子在发育过程中脱水耐性的形成与可溶性糖之间的关系。【方法】以不同发育阶段的马拉巴栗种子和离体胚为试材,观测种子发育过程中可溶性糖组分和含量以及种子和离体胚的脱水耐性变化。【结果】开花后30~70d是种子最快膨胀期,花后50d开始形成脱水耐性,50~70d种子脱水耐性逐渐增强,70d种子脱水耐性最强,80d脱水耐性转而下降,完全成熟时(90d)再轻微上升,其脱水耐性的强弱顺序为:70d>90d>80d>60d>50d,离体胚的脱水耐性与种子的情况相似,其脱水耐性顺序为:70d>80d>90d>60d>50d>40d。在种子发育过程中,初期果糖、半乳糖、葡萄糖含量较高,随后呈下降趋势,蔗糖和麦芽糖含量从开花40d后急剧增加,寡糖(棉籽糖和水苏糖)在花后50d形成,并一直保持较高含量,其中,蔗糖和水苏糖含量最高值出现在开花后70d。在种子发育中,还原性糖与非还原性糖的比例一直下降,90d时两者比值达到最低,此时寡糖含量也略有下降,寡糖/蔗糖比值达到最高,推测80d后种子可能由发育状态转入萌发状态。【结论】马拉巴栗种子脱水耐性与种子发育时期有关,棉籽糖和水苏糖是影响种子脱水耐性形成的重要因子,种子脱水耐性强弱与棉籽糖和水苏糖等非还原性糖的含量及还原性糖/非还原性糖比值密切关联。 展开更多
关键词 马拉巴栗 种子发育进程 可溶性糖 脱水耐性
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马拉巴栗疫病病原的分离与鉴定 被引量:6
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作者 李琳 陈鸿宇 +2 位作者 柳凤 何红 余莎 《园艺学报》 CAS CSCD 北大核心 2011年第12期2395-2400,共6页
2008—2009年,从广东省湛江等地采集疑似疫病的马拉巴栗病株,经病原菌分离及柯赫氏法则验证,证明其病原菌是疫霉菌。通过致病性、寄主范围测定,菌体形态,培养特性及rDNA-ITS序列分析等,将该病原菌初步鉴定为棕榈疫霉(Phytophthora palmi... 2008—2009年,从广东省湛江等地采集疑似疫病的马拉巴栗病株,经病原菌分离及柯赫氏法则验证,证明其病原菌是疫霉菌。通过致病性、寄主范围测定,菌体形态,培养特性及rDNA-ITS序列分析等,将该病原菌初步鉴定为棕榈疫霉(Phytophthora palmivora)。 展开更多
关键词 马拉巴栗 棕榈疫霉 疫病 分离 鉴定
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从藜豆中提取天然黑色素的工艺研究 被引量:8
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作者 陈松 韦万兴 +3 位作者 刘志平 周敏 卓家雄 肖世基 《应用化工》 CAS CSCD 2011年第11期1915-1917,共3页
以我国南方资源丰富的藜豆为原料,对藜豆中的天然黑色素提取工艺进行了研究,得出了藜豆黑色素的最佳提取条件:用4%NaOH溶液于60℃超声浸提40 min,调节pH=2,析出黑色素,得率为3.62%。由紫外和红外波谱分析藜豆黑色素具有邻苯二酚型结构。
关键词 藜豆 黑色素 提取
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