Miscanthus sinensis growing in our study mine site contained a high concentration of Al in the adventitious roots. It has a root endophyte, Phialocephala fortinii, in its adventitious roots at a high frequency. The purpose of this study was to elucidate the effects of P. fortinii on Al tolerance mechanisms of M. sinensis and reveal potential underlying mechanisms. In the absence of P. fortinii, M. sinensis produced chlorogenic, citric, and malic acids that could act to alleviate Al toxicity in acidic mine soil. Up on fungal inoculation, the levels of these compounds were reduced, although the growth of seedlings and Mg concentration in the roots were increased. IAA production by the fungus may contribute to enhanced plant growth whereas an increase of Mg uptake could reduce toxicity of reactive oxygen species under Al stress. These actions of P. fortinii could promote growth and survival of M. sinensis in mine sites.

中文翻译：

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Phialocephala fortinii 提高了酸性矿山土壤中生长的芒草的铝耐受性

芒属植物 吸虫在我们的研究矿区日益增长的不定根含Al的高浓度。它在其不定根中高频存在根内生菌Phialocephala fortinii。本研究的目的是阐明P. fortinii对M. sinensis铝耐受机制的影响，并揭示潜在的潜在机制。在没有P. fortinii，M.吸虫产生了绿原酸、柠檬酸和苹果酸，可以减轻酸性矿山土壤中的铝毒性。在真菌接种后，这些化合物的水平降低，尽管幼苗的生长和根中的镁浓度增加。真菌产生的 IAA 可能有助于促进植物生长，而增加 Mg 吸收可以降低 Al 胁迫下活性氧的毒性。P. fortinii 的这些作用可以促进M. sinensis在矿区的生长和存活。