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亚临界水提取植物多酚类物质的研究进展
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作者 刘莎 《化工中间体》 2015年第8期124-124,共1页
由于亚临界水是一种成本低廉、无毒、无污染的溶剂,所以被应用到天然产物的提取中。植物多酚类物质中的大部分有很强的抗氧化活性,是一种特殊的天然产物。本文将针对植物多酚类物质的提取对亚临界水提取的原理和相关影响因素,对亚临... 由于亚临界水是一种成本低廉、无毒、无污染的溶剂,所以被应用到天然产物的提取中。植物多酚类物质中的大部分有很强的抗氧化活性,是一种特殊的天然产物。本文将针对植物多酚类物质的提取对亚临界水提取的原理和相关影响因素,对亚临界水提取植物多酚类物质的研究进展进行论述与分析。 展开更多
关键词 亚临界水 植物多酚类物质 提取
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昆明市常见绿化树种叶片多酚和叶绿素特征差异研究
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作者 何真敏 彭凌霄 +4 位作者 孙泽 李金仙 张春华 孙永玉 戚建华 《安徽农业科学》 CAS 2024年第7期120-124,共5页
以昆明市10种常见阔叶树种为研究对象,采用DUALEX植物多酚-叶绿素测量计测定不同树种叶绿素含量、植物多酚类物质含量,比较不同树种新叶和老叶叶绿素含量、植物多酚类物质,分析叶龄、叶位对不同树种叶绿素含量和植物多酚类物质的影响。... 以昆明市10种常见阔叶树种为研究对象,采用DUALEX植物多酚-叶绿素测量计测定不同树种叶绿素含量、植物多酚类物质含量,比较不同树种新叶和老叶叶绿素含量、植物多酚类物质,分析叶龄、叶位对不同树种叶绿素含量和植物多酚类物质的影响。结果表明:树种叶绿素含量及植物多酚类物质含量与叶位不显著相关(P>0.05),与叶龄呈显著相关(P<0.05)。证明造成树种间叶绿素、多酚类物质含量的差异并非来自叶位的不同,而是与树种叶龄有明显相关,同时树种间叶绿素、多酚类物质含量不同也与树种间的差异相关,这可为昆明地区阔叶林选种的判断提供科学依据。 展开更多
关键词 阔叶树 叶绿素 植物多酚类物质 昆明地区
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Recent Achievements in the Bio-control of Orobanche Infesting Important Crops in the Mediterranean Basin 被引量:5
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作者 A. Evidente M. A. Abouzeid +1 位作者 A. Andolfi A. Cimmino 《Journal of Agricultural Science and Technology(A)》 2011年第4X期461-483,共23页
Orobanche spp. (broomrapes) are holoparasitic plants distributed predominantly in the Northern Hemisphere parasitizing the roots of a range of plant species mainly in wild ecosystems. Orobanche species cause severe ... Orobanche spp. (broomrapes) are holoparasitic plants distributed predominantly in the Northern Hemisphere parasitizing the roots of a range of plant species mainly in wild ecosystems. Orobanche species cause severe yield reduction of many important crops. There are only very few herbicides which are able to selectively control broomrapes and different approaches have been put forward to develop natural product based pesticides to control Orobanche. Several phytopathogenic fungi were evaluated for their use as potential mycoherbicide and for ability to produce toxic metabolites which could be applied as herbicides. Using the alternative approach "suicidal germination", interesting results were obtained by testing two microbial metabolites (fusicoccins and ophiobolin A) especially with Orobanche species whose germination is not induced by the synthetic strigolactone GR24. From pea root exudates, peagol and peagoldione, close related to strigolactones, and three polyphenols, named peapolyphenols A-C, together with already well known polyphenol and a chalcone, were isolated. They showed a selective stimulation of Orobanche seed germination with the last two and peapolyphenol A showing a specific stimulatory activity on O. foetida. This review describes the most recent results achieved on Orobanche bio-control, mainly focusing on those regarding O. ramosa, O. crenata and O. foetida. 展开更多
关键词 BROOMRAPE O. crenata O. ramosa biological control phytopathogenic fungi phytotoxic metabolites suicidal seedgermination.
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