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Unraveling the role of arbuscular mycorrhizal fungi in mitigating the oxidative burst of plants under drought stress.
Plant Biology ( IF 4.2 ) Pub Date : 2020-08-03 , DOI: 10.1111/plb.13161
Y-N Zou 1 , Q-S Wu 1, 2 , K Kuča 2
Affiliation  

With continued climate changes, soil drought stress has become the main limiting factor for crop growth in arid and semi‐arid regions. A typical characteristic of drought stress is the burst of reactive oxygen species (ROS), causing oxidative damage. Plant‐associated microbes, such as arbuscular mycorrhizal fungi (AMF), can regulate physiological and molecular responses to tolerate drought stress, and they have a strong ability to cope with drought‐induced oxidative damage via enhanced antioxidant defence systems. AMF produce a limited oxidative burst in the arbuscule‐containing root cortical cells. Similar to plants, AMF modulate a fungal network in enzymatic (e.g. GmarCuZnSOD and GintSOD1) and non‐enzymatic (e.g. GintMT1, GinPDX1 and GintGRX1) antioxidant defence systems to scavenge ROS. Plants also respond to mycorrhization to enhance stress tolerance via metabolites and the induction of genes. The present review provides an overview of the network of plant − arbuscular mycorrhizal fungus dialogue in mitigating oxidative stress. Future studies should involve identifying genes and transcription factors from both AMF and host plants in response to drought stress, and utilize transcriptomics, proteomics and metabolomics to clarify a clear dialogue mechanism between plants and AMF in mitigating oxidative burst.

中文翻译:

阐明丛枝菌根真菌在缓解干旱胁迫下植物的氧化爆发中的作用。

随着气候变化的持续,土壤干旱胁迫已成为干旱和半干旱地区作物生长的主要限制因素。干旱胁迫的典型特征是活性氧(ROS)爆炸,引起氧化损伤。与植物相关的微生物,例如丛枝菌根真菌(AMF),可以调节生理和分子反应以耐受干旱胁迫,并且它们具有通过增强的抗氧化剂防御系统来应对干旱引起的氧化损伤的强大能力。AMF在含有丛枝的根皮层细胞中产生有限的氧化爆发。类似于植物,AMF调制真菌网络中的酶(例如GmarCuZnSODGintSOD1)和非酶(例如GintMT1GinPDX1GintGRX1)抗氧化剂防御系统可清除ROS。植物还通过代谢产物和基因诱导对菌根反应作出反应,以增强胁迫耐受性。本综述概述了植物-丛枝菌根真菌对话网络在减轻氧化应激中的作用。未来的研究应包括从AMF和宿主植物中识别基因和转录因子以应对干旱胁迫,并利用转录组学,蛋白质组学和代谢组学来阐明植物与AMF之间在减轻氧化爆发中的清晰对话机制。
更新日期:2020-10-12
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