CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Molecules. 2018 Sep 30;23(10):2506. doi: 10.3390/molecules23102506.
Allelochemicals are the media of allelopathy and form the chemical bases of plant-environment interactions. To determine true allelochemicals and their autotoxic effects, seven compounds were isolated and identified from sampled rhizosphere soil of cultivated . Of these; costunolide (), dehydrocostus lactone () and scopoletin () showed significant inhibition on seedling growth in a concentration-dependent manner. Detection and observation demonstrated that the antioxidase system was found to be affected by these chemicals, resulting in the accumulation of ROS and membrane damage. To investigate their release ways, the compounds were traced back and volumes quantified in rhizosphere soil and plant tissues. This work made clear the chemical bases and their physiological effects on the plants. These chemicals were found to be the secondary metabolites of the plants and included in the rhizosphere soil. The findings identified a potential pathway of plant-plant interactions, which provided theoretical basis to overcoming replanting problems. This research was also useful for exploring ecological effects of allelochemicals in green agriculture.
化感物质是化感作用的媒介，也是植物-环境相互作用的化学基础。为了确定真正的化感物质及其自毒作用，从栽培的 根际土壤中分离和鉴定了 7 种化合物。其中，木香烃内酯（）、去氢木香内酯（）和伞形花内酯（）在浓度依赖性方式下对幼苗生长表现出显著的抑制作用。检测和观察表明，这些化学物质会影响抗氧化酶系统，导致 ROS 积累和膜损伤。为了研究它们的释放途径，这些化合物在根际土壤和植物组织中被追踪并定量。这项工作阐明了这些化合物对植物的化学基础及其生理效应。这些化合物被发现是植物的次生代谢物，并包含在根际土壤中。研究结果确定了植物-植物相互作用的潜在途径，为克服连作障碍提供了理论依据。该研究对于探索绿色农业中化感物质的生态效应也具有重要意义。
