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OsSIZ2 regulates nitrogen homeostasis and some of the reproductive traits in rice

文献类型： 外文期刊

作者： Pei, Wenxia 1 ; Jain, Ajay 2 ; Ai, Hao 1 ; Liu, Xiuli 1 ; Feng, Bing 1 ; Wang, Xiaowen 1 ; Sun, Yafei 1 ; Xu, Guohua 1 ; Sun 1 ;

作者机构： 1.Nanjing Agr Univ, Minist Agr, Key Lab Plant Nutr & Fertilizat Low Middle Reache, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China

2.Amity Univ, Amity Inst Biotechnol, Kant Kalwar NH-11C, Jaipur, Rajasthan, India

3.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing, Jiangsu, Peoples R China

关键词： Homeostasis; Nitrogen; Anther dehiscence; Seed size; OsSIZ2; Rice

期刊名称：JOURNAL OF PLANT PHYSIOLOGY （ 影响因子：3.549； 五年影响因子：4.164 ）

ISSN： 0176-1617

年卷期： 2019 年 232 卷

页码：

收录情况： SCI

摘要： Small ubiquitin-related modifier (SUMO) is a post-translational modification of proteins that has important roles in plant growth and development as well as nutrition study. OsSIZ1, a SUMO E3 ligase in rice (Oryza sativa), exerts regulatory influence on nitrogen (N) homeostasis. Here, we investigated the biological function of OsSIZ2, a paralog of OsSIZ1, in the responses to nitrogen, anther dehiscence, and seed length using a reverse genetics approach. The expression of OsSIZ2 was increased during N deficiency. Under -N condition, total N concentration in the root of OsSIZ2-Ri plants and ossiz2 was significantly increased compared with wild type. Further, N-15-labelled uptake assay revealed the role of OsSIZ2 in acquisition and mobilization of N. Moreover, qRT-PCR analyses revealed that several genes involved in the maintenance of N homeostasis were altered in OsSIZ2 mutants. In addition, ossiz2 indicated obvious defects in anther dehiscence, pollen fertility, and seed set percentage. Interestingly, however, the seed length was longer in the mutant compared with wild type. Overall, these results suggest pivotal roles of OsSIZ2 in regulating homeostasis of N and different agronomic traits including anther and seed development.

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