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GmWRKY46, a WRKY transcription factor, negatively regulates phosphorus tolerance primarily through modifying root morphology in soybean

文献类型： 外文期刊

作者： Liu, Xiaoqian 1 ; Yang, Yuming 1 ; Wang, Ruiyang 1 ; Cui, Ruifan 1 ; Xu, Huanqing 1 ; Sun, Chongyuan 1 ; Wang, Jinshe 4 ; Zhang, Hengyou 3 ; Chen, Huatao 2 ; Zhang, Dan 1 ;

作者机构： 1.Henan Agr Univ, Coll Agron, Collaborat Innovat Ctr Henan Grain Crops, Zhengzhou 450002, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Peoples R China

3.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Soybean Mol Design Breeding, Harbin 150081, Peoples R China

4.Henan Acad Agr Sci, Zhengzhou Natl Subctr Soybean Improvement, Zhengzhou 450002, Peoples R China

关键词： Soybean; Phosphorus deficiency; WRKY46; Transgenic hairy roots

期刊名称：PLANT SCIENCE （ 影响因子：5.363； 五年影响因子：5.454 ）

ISSN： 0168-9452

年卷期： 2022 年 315 卷

页码：

收录情况： SCI

摘要： Phosphorus (P) deficiency affects soybean growth and development, resulting in significant reduction of yields. However, the regulatory mechanism of P deficiency tolerance in soybean is still largely unclear. WRKY transcription factors are a family of regulators involved in a variety of abiotic stresses in plants while rarely reported in P deficiency. Here, we demonstrated that a soybean GmWRKY46 gene, belonging to group III of WRKY TF family, was involved in the regulation of P deficiency tolerance in soybean. The expression of GmWRKY46 in low P sensitive soybean varieties was significantly higher than that in tolerant soybean varieties. It was primarily expressed in roots and strongly induced by P deprivation. GmWRKY46 was localized in the nucleus. Compared with the control expressing the empty vector, overexpression of GmWRKY46 in soybean hairy roots exhibited more sensitive phenotypes to low P stress, while the RNA interfered GmWRKY46 significantly enhanced P deficiency tolerance by increasing the proliferation, elongation and P absorption efficiency of hairy roots. Expression patterns of a number of P-responsive genes (GmPht1;1, GmPht1;4, GmPTF1, GmACP1, GmPAP21 and GmExpansin-A7) were altered in both overexpression and gene silenced plants. The results provided a novel insight into how soybean responds to low P stress and new gene that may be used to improve soybean low P tolerance through gene editing approach.

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