Molecular analyses of tomato GS, GOGAT and GDH gene families and their response to abiotic stresses
文献类型: 外文期刊
作者: Liu, Lifeng;Wang, Jing;Han, Zhihui;Li, Hanxia;Zhang, Junhong;Lu, Yongen;Liu, Lifeng;Sun, Xuecheng
作者机构:
关键词: Tomato;Glutamine synthetase;Glutamate synthase;Glutamate dehydrogenase;Gene expression
期刊名称: ACTA PHYSIOLOGIAE PLANTARUM
ISSN:
年卷期:
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收录情况: SCI
摘要: Glutamine synthetase (GS), glutamate synthase (GOGAT) and glutamate dehydrogenase (GDH) are closely related enzymes in plant nitrogen metabolism and potential targets for improving nitrogen use efficiency. However, little research has focused on the enzyme-encoding genes in tomato. Here, a comprehensive study of these genes was conducted. Six GS genes, two GOGAT genes and five GDH genes were identified in tomato. Bioinformatics and gene expression analyses suggested that these genes evolved species-specific regulatory properties and biological functions in tomato. SlNADH-GOGAT, SlGS1.1 and SlNAD-GDHB1 were abundantly expressed in roots, SlGS1.1 can be induced by nitrogen deprivation, and SlGS1.2, SlGS1.3, SlNADH-GOGAT and SlNAD-GDHB1 can be induced by the re-supply of nitrogen after 5 days of deprivation, they may play key roles in primary nitrogen assimilation. SlFd-GOGAT, SlGS1.1 and SlNAD-GDHA1-A2 were also highly expressed in fruits, indicating their important roles in fruit development and ripening. Tomato GS, GOGAT and GDH may be involved in stress responsiveness, since most of these genes modified their expression levels under drought, cold or heat stress treatment. We believe these findings will assist in the exploration of the genes' biological functions and regulatory mechanisms, as well as the studies to improve nitrogen use efficiency, stress resistance and fruit quality in tomato.
分类号: Q94
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