Arbuscular mycorrhizal fungi increase growth and phenolics synthesis in Poncirus trifoliata under iron deficiency

文献类型： 外文期刊

第一作者： Li, Jian-Fu

作者： Li, Jian-Fu;Li, Hang;Zheng, Wen-Jun;Liu, Jian-Fu;Wang, Ming-Yuan;He, Xin-Hua;He, Xin-Hua

作者机构：

关键词： Arbuscular mycorrhizal fungi (AMF);Phenolics;Poncirus trifoliate;Iron deficiency;Expression;pal1 gene

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

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收录情况： SCI

摘要： In order to reveal the changes phenolics involved in symbiotic process between arbuscular mycorrhizal fungi (AMF) and host plant, the impacts of arbuscular mycorrhizal (AM) fungus on growth and phenolic synthesis in Poncirus trifoliata under iron deficiency were investigated. The P. trifoliata seedlings were inoculated with or without AM fungus Glomus versiforme irrigated with Fe-deficient (0 mu M o,o-FeEDDHA) or Fe-sufficient (50 mu M o,o-FeEDDHA) nutrient solution twice a week. Three months later, we monitored biomass, the contents of phenolics, the activities of phenylalanine ammonia-lyase (PAL) and the expression of pal1 gene. Mycorrhizal colonization significantly promoted P. trifoliata growth and phenolic synthesis compared with the non-AMF control, in parallel with the increase in PAL enzyme activity and pal1 gene expression. Mycorrhization significantly increased ferulic acid, gallic acid, phlorizin and salicylic acid. Caffeic acid, chlorogenic acid, coumaric acid, protocatechuic, rutin, syringic acid, vanillin and vanilloid were not detected in both AMF and non-AMF inoculated treatments. However, phloretin was only present in Fe-deficient groups whether it was inoculated with AMF or not. In conclusion, phenolics changes and integrated transcriptional regulation might play a crucial role in AMP-mediated alleviation of iron stress in P. trifoliata. (C) 2014 Elsevier B.V. All rights reserved.

分类号： S6

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