魔芋葡甘露寡糖诱导水稻对纹枯病抗性的研究  

Resistance Induced by Konjac Glucomannan Oligosaccharides in Rice against Sheath Blight

作　　者：温金璇 高晋 李悝悝 李曙光[1] 王文霞[1] 尹恒[1] WEN Jinxuan;GAO Jin;LI Xingxing;LI Shuguang;WANG Wenxia;YIN Heng(Liaoning Key Laboratory of Carbohydrates at Dalian Institute of Chemical Physics of CAS,Dalian,Liaoning 116023,China;University of Chinese Academy of Science,Beijing 100049,China)

机构地区：[1]中国科学院大连化学物理研究所辽宁省碳水化合物重点实验室,辽宁大连116023 [2]中国科学院大学,北京100049

出　　处：《陕西农业科学》2025年第1期71-78,共8页Shaanxi Journal of Agricultural Sciences

基　　金：国家重点研发计划项目(2023YFD1700600);国家自然科学基金项目(32270210);中国科学院战略重点研究计划项目(XDA28090307);四川省区域合作创新项目(24QYCX0072)。

摘　　要：本研究旨在探讨KGMOS在水稻抵御纹枯病中的作用及其机制。结果表明,KGMOS处理能显著抑制R.solani菌丝生长及其引起的水稻纹枯病病情发展和真菌定殖,表现出良好的生物防治效果。进一步分析发现,相较于对照组,KGMOS处理显著上调了水杨酸含量,同时水杨酸合成相关基因OsPAL和水杨酸受体基因OsNPR1表达量均显著上调,表明其可通过激活水杨酸信号途径增强水稻对纹枯病的抗性,本研究揭示了KGMOS在激发水稻免疫反应中的潜力及其可能的信号转导机制,为开发基于KGMOS的环保型水稻纹枯病防治剂提供了研究基础。This study investigated the role and underlying mechanism of KGMOS in enhancing rice resistance against sheath blight caused by Rhizoctonia solani Kühn(R.solani).The results indicated that KGMOS treatment significantly inhibited the progression of sheath blight disease and fungal colonization in rice,demonstrating an effective biocontrol effect.Further analysis revealed that,compared to the control group,KGMOS treatment significantly increased salicylic acid(SA)levels and upregulated the expression of the SA biosynthesis-related gene OsPAL and the SA receptor gene OsNPR1.These findings suggest that KGMOS enhances rice resistance to sheath blight through the activation of the SA signaling pathway.This study unveils the potential of KGMOS in triggering rice immune responses and its possible signal transduction mechanism,providing a foundation for developing environmentally friendly,KGMOS-based agents.

关 键 词：水稻纹枯病 魔芋葡甘露寡糖 生物防治 

分 类 号：S435[农业科学—农业昆虫与害虫防治]