Alleviation of drought stress by mycorrhizas is related to increased root H2O2 efflux in trifoliate orange
文献类型： 外文期刊
作者： Huang, Yong-Ming 1 ; Zou, Ying-Ning 1 ; Wu, Qiang-Sheng 1 ;
作者机构： 1.Yangtze Univ, Coll Hort & Gardening, Jingzhou 434025, Hubei, Peoples R China
2.Yangtze Univ, Inst Root Biol, Jingzhou 434025, Hubei, Peoples R China
3.Hubei Acad Agr Sci, Inst Fruit & Tea, Wuhan 430064, Hubei, Peoples R China
4.Univ Hradec Kralove, Fac Sci, Dept Chem, Hradec Kralove 50003, Czech Republic
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2017 年 7 卷
页码：
收录情况： SCI
摘要： The Non-invasive Micro-test Technique (NMT) is used to measure dynamic changes of specific ions/molecules non-invasively, but information about hydrogen peroxide (H2O2) fluxes in different classes of roots by mycorrhiza is scarce in terms of NMT. Effects of Funneliformis mosseae on plant growth, H2O2, superoxide radical (O-2(center dot-)), malondialdehyde (MDA) concentrations, and H2O2 fluxes in the taproot (TR) and lateral roots (LRs) of trifoliate orange seedlings under well-watered (WW) and drought stress (DS) conditions were studied. DS strongly inhibited mycorrhizal colonization in the TR and LRs, whereas mycorrhizal inoculation significantly promoted plant growth and biomass production. H2O2, O-2(center dot-), and MDA concentrations in leaves and roots were dramatically lower in mycorrhizal seedlings than in non-mycorrhizal seedlings under DS. Compared with non-mycorrhizal seedlings, mycorrhizal seedlings had relatively higher net root H2O2 effluxes in the TR and LRs especially under WW, as well as significantly higher total root H2O2 effluxes in the TR and LRs under WW and DS. Total root H2O2 effluxes were significantly positively correlated with root colonization but negatively with root H2O2 and MDA concentrations. It suggested that mycorrhizas induces more H2O2 effluxes of the TR and LRs, thus, alleviating oxidative damage of DS in the host plant.
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