Identification and Expression Analysis of Multiple Ferric Chelate Reductases in Citrus junos
文献类型: 外文期刊
第一作者: Yao, Li-Xiao
作者: Yao, Li-Xiao;He, Yong-Rui;Fan, Hai-Fang;Xu, Lan-Zhen;Lei, Tian-Gang;Zou, Xiu-Ping;Peng, Ai-Hong;Li, Qiang;Chen, Shan-Chun
作者机构:
关键词: FRO;tissue expression;iron deficiency
期刊名称:JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE ( 影响因子:1.144; 五年影响因子:1.617 )
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收录情况: SCI
摘要: Ferric chelate reductase (FRO) is a critical enzyme for iron absorption in strategy I plants, reducing Fe3+ to Fe2+. To identify FRO family genes in the local Citrus junos cultivar Ziyang Xiangcheng and to reveal their expression model, the citrus (Citrus sp.) genome was searched for homologies of the published sequence CjFRO1. Five FROs were found, including CjFRO1; these were named CjFRO2, CjFRO3, CjFRO4, and CjFRO5, respectively, and cloned via reverse transcription polymerase chain reaction (RT-PCR) and rapid amplification of cDNA ends (RACE) PCR. The deduced amino acid sequences of five CjFROs contained flavin adenine dinucleotide (FAD)-binding motifs, nicotinamide adenine dinucleotide (NAD)-binding motifs, and 6-10 transmembrane domains, with isoelectric points between 6.73 and 9.46, and molecular weights between 67.2 and 79.9 kD. CjFRO1 and CjFRO2 were predominantly found in the aboveground parts of C. junos, with CjFRO1 highly expressed in leaves, and CjFRO2 largely expressed in stems and leaves. CjFRO3 was less expressed in roots, stems, and leaves. CjFRO4 and CjFRO5 were predominately found in roots. Under iron-deficient conditions, CjFRO4 was significantly and specifically increased in the roots of C. junos, whereas CjFRO1 was upregulated in the roots and leaves.
分类号: S6
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