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Identification and Functional Analysis of the NADK Gene Family in Wheat

文献类型： 外文期刊

作者： Wang, Xiang 1 ; Li, Wen-Yan 2 ; Zhang, Mao-Mao 1 ; Gao, Yin-Tao 1 ; Liu, Wen-Ting 1 ; Li, Wen-Qiang 1 ; Muhammad, Izha 1 ;

作者机构： 1.Northwest A& F Univ, Coll Life Sci, State Key Lab Crop Stress Biol Arid Area S, Yangling 712100, Shaanxi, Peoples R China

2.Guangdong Acad Agr Sci, Agrobiol Gene Res Ctr, Guangzhou 510640, Guangdong, Peoples R China

关键词： Wheat;Cereal plant;NAD(H) kinase;Subcellular localization;Stress response

期刊名称：PLANT MOLECULAR BIOLOGY REPORTER （ 影响因子：1.595； 五年影响因子：2.042 ）

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收录情况： SCI

摘要： NAD(H) kinase (NADK) is a key enzyme for maintaining the cellular NAD(H)/NADP(H) balance and for NADP(H)-based metabolic pathways. We identified four NADK homologs, NADK1-4, from three major cereal crops, wheat, rice and maize, based on their phylogenetic relationships and gene structures. Four of the 11 NADK genes isolated from the wheat genome (TaNADK1-4) were cloned. Subcellular localization analysis showed that TaNADK1 and 2 are located in the cytosol, TaNADK3 in chloroplasts and TaNADK4 in peroxisomes. The genes of wheat NADKs were expressed in all tissues examined and throughout development, with the same tissue specificity and developmental stage dominance. Although we found some species specificities between the orthologous and/or paralogous genes of the cereal NADKs, transcripts of these genes in wheat, rice and maize were all notably affected in the presence of one of several abiotic stresses or hormonal treatments, demonstrating their crucial roles in the abiotic stress response and hormone signaling regulation. The cereal NADKs might function in cellular NAD(H)/NADP(H) balance and NADP(H) production for redox-based enzymatic processes in plants and therefore contribute to plant stress tolerance and developmental regulation. The compartmentalization of different NADKs might play a fundamental role in the regulation of multiple biological processes.

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