Waterlogging is a common problem compromising plant growth. The endophytic microbiota can improve the rice response to waterlogging stress. However, the mechanism by endophytic microbiota enhances the rice adaption to waterlogging stress is unknown. In this study, the root system architecture, especially well-developed root aerenchyma, was improved in Phomopsis liquidambaris B3 inoculation treatment under waterlogging stress. It was also found the improvement of chlorophyll and soluble sugar contents, ATP, and activities of critical aerobic and anaerobic respiration enzymes in rice. Compared to non-inoculated treatment, ATP was improved by respiration in rice roots under anoxic conditions in the Phomopsis liquidambaris B3 inoculation treatment, contributing to the synergy absorption of multiple mineral elements. Therefore, our results suggest that Phomopsis liquidambaris B3 promotes rice waterlogging tolerance through increasing root aerenchyma development and thereby improving energy metabolism and the accumulation of mineral elements.

涝渍是影响植物生长的常见问题。内生微生物群可以改善水稻对涝渍胁迫的反应。然而，内生微生物群增强水稻对涝渍胁迫的适应机制尚不清楚。在这项研究中，根系结构，特别是发育良好的根系通气组织，在涝渍胁迫下接种液体拟南芥B3得到了改善。还发现叶绿素和可溶性糖含量、ATP 以及关键有氧和无氧呼吸酶活性的改善。与未接种处理相比，Phomopsis liquidambaris在缺氧条件下通过水稻根部的呼吸作用提高了 ATPB3接种处理，有助于多种矿物质元素的协同​​吸收。因此，我们的研究结果表明，Phomopsis liquidambaris B3 通过增加根系通气组织的发育，从而改善能量代谢和矿物质元素的积累来促进水稻耐涝。