Mycorrhizal and Non-mycorrhizal Responses to Salt Stress in Trifoliate Orange: Plant Growth, Root Architecture and Soluble Sugar Accumulation

文献类型： 外文期刊

第一作者： Zou, Ying-Ning

作者： Zou, Ying-Ning;Wu, Qiang-Sheng;Liang, Yong-Chao;Wu, Qiang-Sheng

作者机构：

关键词： Mycorrhizas;Citrus;Root architecture;Salt stress;Trifoliate orange

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2013 年 15 卷 3 期

页码：

收录情况： SCI

摘要： Although using arbuscular mycorrhizal fungi (AMF) to alleviate salt stress has received ever-increasing attention, responses of root architecture and soluble sugars to AMF are unclear in citrus. In a pot experiment, we compared the differences in growth, root architecture and soluble sugars in five-month-old trifoliate orange (Poncirus trifoliata) seedlings colonized with or without Glomus versiforme and exposed to 0, 100, 200 and 300 mM NaCl. Mycorrhizal colonization decreased from 46.86 to 4.83% (P<0.05) with increased NaCl concentrations. Increasing NaCl concentrations inhibited growth performance of mycorrhizal and non-mycorrhizal seedlings, but AMF could partly alleviate the negative salt effects, when the plants were treated with 0, 100 and 200 mM NaCl. Increasing salt concentrations decreased parameters of root architecture, while root length, root surface area, root projected area and root volume were generally higher in mycorrhizal than in non-mycorrhizal seedlings grown with 0, 100 and 200 mM NaCl. Root and leaf soluble sugar contents were significantly higher in mycorrhizal than in non-mycorrhizal seedlings under salt stress. We concluded that inoculation with AMF could, to some extent, alleviate salt damage in trifoliate orange seedling, whilst the alleviative effect was highly NaCl dose-dependent with no efficacy at 300 mM NaCl. (C) 2013 Friends Science Publishers

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