College of Geography and Environmental Science, Henan University, Kaifeng, China.
College of Resources and Environmental Sciences, China Agricultural University, Beijing, China.
Pest Manag Sci. 2023 Aug;79(8):2664-2674. doi: 10.1002/ps.7445. Epub 2023 Mar 17.
The incidence of herbicide-resistant barnyardgrass is escalating in paddy fields, yet the interactions between resistant weeds and rice are largely unknown. The microbiota of herbicide-resistant barnyardgrass rhizosphere soil is critical for both barnyardgrass and rice fitness.
Rice has different biomass allocation and root traits in the presence of penoxsulam-resistant versus penoxsulam-susceptible barnyardgrass or in their conditioned soil. Compared to susceptible barnyardgrass, resistant barnyardgrass led to an allelopathic increase in rice root, shoot, and whole-plant biomasses. Resistant barnyardgrass recruited distinct core and unique microbes in rhizosphere soil compared to susceptible barnyardgrass. In particular, resistant barnyardgrass assembled more Proteobacteria and Ascomycota to enhance plant stress tolerance. Furthermore, the root exudates from resistant and susceptible barnyardgrass were responsible for the assembly and establishment of the root microbial structure. Importantly, (-)-loliolide and jasmonic acid in root exudates were correlated with the core microbes in the rhizosphere soil.
The interference of barnyardgrass with rice can be mediated by rhizosphere microbial communities. Biotype-specific variation in the ability to generate soil microbial communities appears to ameliorate the negative consequences for rice growth, providing an intriguing possibility for modulation of the rhizosphere microbiota to increase crop productivity and sustainability. © 2023 Society of Chemical Industry.
水田中除草剂抗性稗草的发生率正在不断上升，但抗性杂草与水稻之间的相互作用在很大程度上尚不清楚。稗草根际土壤中微生物群落对稗草和水稻的适应性都至关重要。
与对吡嘧磺隆敏感的稗草相比，在存在对吡嘧磺隆具有抗性的稗草或其条件土壤的情况下，水稻的生物量分配和根系特征会有所不同。与敏感稗草相比，抗性稗草会导致水稻根系、地上部分和整株生物量产生化感增加。与敏感稗草相比，抗性稗草在根际土壤中招募了不同的核心和独特的微生物。特别是，抗性稗草组装了更多的变形菌门和子囊菌门以增强植物的胁迫耐受性。此外，来自抗性和敏感稗草的根分泌物负责组装和建立根微生物结构。重要的是，根分泌物中的(-)-丁香烯和茉莉酸与根际土壤中的核心微生物相关。
稗草对水稻的干扰可以通过根际微生物群落来介导。生物型特异性的产生土壤微生物群落的能力的变化似乎可以减轻对水稻生长的负面影响，为调节根际微生物群以提高作物生产力和可持续性提供了一个有趣的可能性。© 2023 化学工业协会。
