Sun Si-Miao, Chang Wei, Song Fu-Qiang
Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, Harbin 150080, China.
Engineering Research Center of Agricultural Microbiology Techno-logy, Harbin 150500, China.
Ying Yong Sheng Tai Xue Bao. 2020 Oct;31(10):3589-3596. doi: 10.13287/j.1001-9332.202010.040.
Soil salinization induced by the dual effects of natural environment and human activities is a serious ecological problem globally. Salinization caused osmotic imbalance, ion stress, oxidative damage, and other hazards to plants, leading to retard, reduce biomass and even total crop failure. Arbuscular mycorrhizal fungi (AMF) is a group of beneficial microorganism with wide distribution. AMF can form symbiotic relationship with most plant roots, with ecological significance in various stressed ecosystems. Because of the highly effective antioxidative system in symbionts, AMF could improve plant anti-oxidative response under salt stress and enhance their tolerance to salt stress. Here, we reviewed the research progress of arbuscular mycorrhizal symbiosis in improing plant antioxidative mechanism, including oxidative damage, osmotic regulation, antio-xidant mechanism and bioactive molecules. Finally, research prospects were proposed to provide theoritical support for improving plant salt tolerance by mycorrhizal biotechnology.
由自然环境和人类活动的双重影响导致的土壤盐渍化是全球范围内一个严重的生态问题。盐渍化对植物造成渗透失衡、离子胁迫、氧化损伤等危害，导致植物生长迟缓、生物量减少甚至作物绝收。丛枝菌根真菌（AMF）是一类分布广泛的有益微生物。AMF能与大多数植物根系形成共生关系，在各种胁迫生态系统中具有生态意义。由于共生体中存在高效的抗氧化系统，AMF能改善盐胁迫下植物的抗氧化反应，增强其对盐胁迫的耐受性。在此，我们综述了丛枝菌根共生在改善植物抗氧化机制方面的研究进展，包括氧化损伤、渗透调节、抗氧化机制和生物活性分子。最后，提出了研究展望，为通过菌根生物技术提高植物耐盐性提供理论支持。
