Bio-guided isolation of plant growth regulators from allelopathic plant-Codonopsis pilosula: phyto-selective activities and mechanisms

• DOI: 10.1039/c7ra12072a
• Publication Date: 2018-04-12T07:34:00Z
• Authors: Min Xie; Jingkun Liu; Zhiqiang Yan; Xiuzhuang Li; Xiaoyan Yang; Hui Jin; Anxiang Su; Bo Qin
• Keywords: Allelopathy; Setaria viridis

Natural pesticides are the subject of growing interest, as overuse synthetic severely threatens safety humans and eco-environment. Allelopathic plants can release plentiful secondary metabolites natural plant growth regulators to affect neighboring plants. Bio-guided isolation aerial waste part typical allelopathic plant-Codonopsis pilosula led six active compounds being produced, including ginsenoside Rg1 (1), Re (2), luteolin (3), luteolin-5-O-glucoside (4), Rb1 (5) lobetyolin (6). Ginsenosides were firstly found in Codonopsis. Phyto-activity tests showed that all inhibiting effects toward C. pilosula, 2, 4, 5 6 also inhibitors Amaranthus retroflexus. By contrast, promoted seedling wheat, rice Setaria viridis. At certain concentrations, 1, 4 could observably promote wheat seedlings, respectively, exceeding The different two weeds might be related ROS levels induced by compounds. amounts root tips S. viridis low those control test, content increased with aggravation inhibition effect. In summary, successful phyto-selective chemicals from may provide a promising method for herbicide screening. isolated potentially applied dicotyledon promoters monocotyledon crops weed management agriculture.