Mycorrhizas induce diverse responses of root TIP aquaporin gene expression to drought stress in trifoliate orange
文献类型： 外文期刊
作者： He, Jia-Dong 1 ; Dong, Tao 2 ; Wu, Hui-Hui 1 ; Zou, Ying-Ning 1 ; Wu, Qiang-Sheng 1 ; Kuca, Kamil 3 ;
作者机构： 1.Yangtze Univ, Coll Hort & Gardening, Jingzhou 434025, Hubei, Peoples R China
2.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangzhou 510640, Guangdong, Peoples R China
3.Univ Hradec Kralove, Fac Sci, Dept Chem, Hradec Kralove 50003, Czech Republic
关键词： Aquaporin; Arbuscular mycorrhiza; Phytohormone; Symbiosis; Water deficit
期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）
ISSN： 0304-4238
年卷期： 2019 年 243 卷
页码：
收录情况： SCI
摘要： Arbuscular mycorrhizal fungi (AMF) can enhance plant tolerance to drought stress (DS), while it is unclear whether aquaporins take part in the AMF-modulated mechanisms. In this study, a potted experiment was conducted to investigate the effects of an arbuscular mycorrhizal fungus, Funneliformis mosseae, on plant growth, leaf water status, root abscisic acid (ABA), and relative expression levels of root tonoplast intrinsic protein (TIPS, one of the most abundant aquaporins on plant vacuoles and plasma membranes) genes of trifoliate orange (Poncirus trifoliata L. Raf.) seedlings under well-watered (WW) and DS. The 8-week DS significantly decreased mycorrhizal colonization by 19.5%. In both WW and DS, AMF significantly enhanced leaf relative water content, leaf water potential, and plant growth performance (plant height, stem diameter, leaf number, and biomass), as well as root ABA levels. With regards to root TIPs, seven TIP genes were identified. Meanwhile, AMF treatment up-regulated PtTIP1;2, PtTIP2;1, PtTIP4;1, and PtTIP5;1 and down-regulated PtTTP1;1 and PtTIP2;2 under WW. Under DS, AMF seedlings showed higher expression levels of root PtTIPI;2, PtTIP1;3, and PtTIP4;1 and lower expression levels of root PtTIP2;1 and Pt77P5;1. It concludes that root TIPS exhibited diverse responses to mycorrhization, indicating the multiple roles of AMF in water absorption under drought.
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