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深色有隔内生菌——菌根真菌重要伙伴及基因组适应性特征
李忠风, 朱志勇, 袁志林
PDF(1467 KB)
PDF(1467 KB)
深色有隔内生菌——菌根真菌重要伙伴及基因组适应性特征
Dark Septate Endophytes: Important Partners of Mycorrhizal Fungi and Their Genomic Signatures for Adaptation
深色有隔内生菌(dark septate endophytes,DSEs)是植物根系真菌组(mycobiome)的重要成员,通常在皮层细胞形成微菌核结构,在促进植物生长、养分吸收及提高胁迫适应性方面发挥着与菌根真菌同等重要的作用,甚至在某些极端环境下其丰度比菌根真菌更高。该文概述了DSEs的物种多样性、基础生物学特性和生理生态功能。在此基础上,重点评述了近年来在共生机理、DSEs基因组结构和种群适应性演化特征等方面的研究进展,旨在为后期深入揭示DSEs新的适应机制、协同植物抗逆机制及开发新型高效DSEs菌剂应用于土壤生态修复和抗逆农林业良种高效培育等提供参考。
Dark septate endophytes(DSEs) constitute an important component of root-associated mycobiome and typically develop microsclerotia-like structures in cortical cells. Generally, DSEs perform functions similar to those of mycorrhizal fungi in promoting plant growth, nutrient uptake and stress tolerance. Under certain extreme environments, the abundance of DSEs often exceeds that of mycorrhizal fungi. In this review article, we first summarized the species diversity, basic biological traits and eco-physiological functions played by DSEs, an important component of root-associated mycobiome. We then mainly focused on the advances concerning mechanisms underlying plant-DSEs mutualism as well as genomic signatures and evolutionary adaptation of DSEs. Together, our understanding of more adaptive potentials of DSEs and their extended effects on improving plant abiotic tolerance emerged. Promisingly, the development of robust DSE inoculants used for ecological restoration of soils and improvement of plant productivity in agro-forestry systems under stressful environment was briefly discussed.
dark septate endophytes / mycorrhizal fungi / mutualistic relationships / population divergence
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