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首页> 外文期刊>RSC Advances >Bio-guided isolation of plant growth regulators from allelopathic plant-Codonopsis pilosula: phyto-selective activities and mechanisms
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Bio-guided isolation of plant growth regulators from allelopathic plant-Codonopsis pilosula: phyto-selective activities and mechanisms

机译：从化感植物党参党参的生物引导分离植物生长调节剂：植物选择性活动和机制。

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摘要

Natural pesticides are the subject of growing interest, as the overuse of synthetic pesticides severely threatens the safety of humans and the eco-environment. Allelopathic plants can release plentiful secondary metabolites as natural plant growth regulators to affect the growth of neighboring plants. Bio-guided isolation of the aerial waste part of typical allelopathic plant- Codonopsis pilosula led to six active compounds being produced, including ginsenoside Rg _(1) ( 1 ), ginsenoside Re ( 2 ), luteolin ( 3 ), luteolin-5- O -glucoside ( 4 ), ginsenoside Rb _(1) ( 5 ) and lobetyolin ( 6 ). Ginsenosides and luteolin-5- O -glucoside were firstly found in Codonopsis . Phyto-activity tests showed that all compounds showed inhibiting effects toward C. pilosula , and compounds 2 , 4 , 5 and 6 were also inhibitors of Amaranthus retroflexus . By contrast, the compounds promoted the seedling growth of wheat, rice and Setaria viridis . At certain concentrations, compounds 1 , 4 , 5 and 1 , 2 , 4 could observably promote the growth of wheat and rice seedlings, respectively, exceeding Setaria viridis . The different effects toward the two weeds might be related to the different ROS levels induced by the compounds. The ROS amounts in the root tips of S. viridis were as low as those in the control test, and the ROS content in the root tips increased with aggravation of the inhibition effect. In summary, successful isolation of phyto-selective chemicals from allelopathic plants may provide a promising method for natural herbicide screening. The compounds isolated could potentially be applied as inhibitors of dicotyledon weeds and promoters of monocotyledon crops for weed management in agriculture.
机译：天然杀虫剂受到越来越多的关注，因为合成杀虫剂的过度使用严重威胁着人类的安全和生态环境。化感植物可以释放大量次生代谢产物，作为天然植物的生长调节剂，从而影响邻近植物的生长。典型化感植物植物党参的空中废物的生物引导分离导致产生了六种活性化合物，包括人参皂苷Rg _（1）（1），人参皂苷Re（2），木犀草素（3），木犀草素-5- O-葡萄糖苷（4），人参皂甙Rb_（1）（5）和洛贝唑啉（6）。人参皂苷和木犀草素-5-O-葡糖苷首先在党参中发现。植物活性测试表明，所有化合物均对毛孢梭菌具有抑制作用，化合物2、4、5和6也是were菜的抑制剂。相反，这些化合物促进了小麦，水稻和狗尾草的幼苗生长。在一定浓度下，化合物1、4、5和1、2、4可以分别显着促进小麦和水稻幼苗的生长，超过狗尾草。对两种杂草的不同影响可能与该化合物诱导的不同ROS水平有关。 S. viridis根尖中的ROS含量与对照试验一样低，并且随着抑制作用的加剧，根尖中的ROS含量也随之增加。总之，从化感植物中成功分离植物选择性化学物质可能为天然除草剂筛选提供一种有前途的方法。分离出的化合物可潜在地用作双子叶植物杂草的抑制剂和单子叶植物作物的促进剂，用于农业杂草处理。

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