School of Agriculture and Environment, Massey University, Palmerston North, New Zealand.
Pest Manag Sci. 2020 Aug;76(8):2543-2547. doi: 10.1002/ps.5850. Epub 2020 Apr 21.
The evolution of resistance to herbicides in weeds has become a great challenge for global agricultural production. Weeds have evolved resistance to herbicides through many different physiological mechanisms. Some weed species are known to secrete herbicide molecules from roots into the rhizosphere upon being treated. However, root exudation of herbicides as a mechanism of resistance has only recently been identified in two weed species. Root exudation pathways have been investigated in Arabidopsis, and this work suggested that ATP-binding cassette (ABC) and multidrug and toxic compound extrusion (MATE) transporters play a role in the secretion of primary and secondary plant products from roots. We hypothesize that the mechanisms involved in root exudation of herbicides that result in resistance are mediated by overactive or overexpressed transporters, probably similar to those found for the exudation of primary and secondary compounds from roots. Elucidating the molecular and physiological basis of root exudation in herbicide-resistant weeds would improve our understanding of the pathways involved in herbicide root secretion mediated by transporters in plants. © 2020 Society of Chemical Industry.
杂草对除草剂的抗性演变已成为全球农业生产的一大挑战。杂草通过许多不同的生理机制进化出了对除草剂的抗性。一些杂草物种在被处理时，已知会从根部将除草剂分子分泌到根际中。然而，最近仅在两种杂草物种中才确定了除草剂的根分泌作为一种抗性机制。已经在拟南芥中研究了根分泌途径，这项工作表明，三磷酸腺苷结合盒（ABC）和多药和毒性化合物外排（MATE）转运蛋白在从根部分泌初生和次生植物产物中发挥作用。我们假设导致抗性的除草剂根分泌所涉及的机制是由过度活跃或过度表达的转运蛋白介导的，可能与从根部分泌初生和次生化合物的转运蛋白相似。阐明耐除草剂杂草中根分泌的分子和生理基础将提高我们对植物转运蛋白介导的除草剂根分泌途径的理解。© 2020 英国化学学会。
