Over-Expression of a 14-3-3 Protein From Foxtail Millet Improves Plant Tolerance to Salinity Stress in Arabidopsis thaliana
文献类型： 外文期刊
作者： Liu, Jiaming 1 ; Jiang, Chengyao 3 ; Kang, Lu 1 ; Zhang, Hongchang 1 ; Song, Yu 4 ; Zou, Zhirong 3 ; Zheng, Weijun 5 ;
作者机构： 1.Northwest A&F Univ, State Key Lab Crop Stress Biol Arid Areas, Yangling, Shaanxi, Peoples R China
2.Northwest A&F Univ, Coll Life Sci, Yangling, Shaanxi, Peoples R China
3.Northwest A&F Univ, Coll Hort, Yangling, Shaanxi, Peoples R China
4.Xinjiang Acad Agr Sci, Inst Germplasm Resources, Urumqi, Peoples R China
5.Northwest A&F Univ, Coll Agron, Yangling, Shaanxi, Peoples R China
关键词： foxtail millet; SiGRF; overexpression; protein interaction; flowering; salt stress
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）
ISSN： 1664-462X
年卷期： 2020 年 11 卷
页码：
收录情况： SCI
摘要： In plants, 14-3-3 proteins are recognized as mediators of signal transduction and function in both development and stress response. However, there are only a few preliminary functional researches in the C4 crop foxtail millet. Here, phylogenetic analysis categorized foxtail millet 14-3-3s (SiGRFs) into 10 discrete groups (Clusters I to X). Transcriptome and qPCR analyses showed that all the SiGRFs responded to at least one abiotic stress. All but one SiGRF-overexpressing (OE) Arabidopsis thaliana line (SiGRF1) exhibited insensitivity to abiotic stresses during seed germination and seedling growth. Compared with the Col-0 wild-type, SiGRF1-OEs had slightly lower germination rates and smaller leaves. However, flowering time of SiGRF1-OEs occurred earlier than that of Col-0 under high-salt stress. Interaction of SiGRF1 with a foxtail millet E3 ubiquitin-protein ligase (SiRNF1/2) indicates that the proteinase system might hydrolyze SiGRF1. Further investigation showed that SiGRF1 localized in the cytoplasm, and its gene was ubiquitously expressed in various tissues throughout various developmental stages. Additionally, flowering-related genes, WRKY71, FLOWERING LOCUS T, LEAFY, and FRUITFULL, in SiGRF1-OEs exhibited considerably higher expression levels than those in Col-0 under salinity-stressed conditions. Results suggest that SiGRF1 hastens flowering, thereby providing a means for foxtail millet to complete its life cycle and avoid further salt stress.
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