Genome-wide analysis of primary auxin-responsive Aux/IAA gene family in maize (Zea mays. L.).
The phytohormone auxin is important in various aspects of organism growth and development. Aux/IAA genes encoding short-lived nuclear proteins are responsive primarily to auxin induction. Despite their physiological importance, systematic analysis of Aux/IAA genes in maize have not yet been reported. In this paper, we presented the isolation and characterization of maize Aux/IAA genes in whole-genome scale. A total of 31 maize Aux/IAA genes (ZmIAA1 to ZmIAA31) were identified. ZmIAA genes are distributed in all the maize chromosomes except chromosome 2. Aux/IAA genes expand in the maize genome partly due to tandem and segmental duplication events. Multiple alignment and motif display results revealed major maize Aux/IAA proteins share all the four conserved domains. Phylogenetic analysis indicated Aux/IAA family can be divided into seven subfamilies. Putative cis-acting regulatory DNA elements involved in auxin response, light signaling transduction and abiotic stress adaption were observed in the promoters of ZmIAA genes. Expression data mining suggested maize Aux/IAA genes have temporal and spatial expression pattern. Collectively, these results will provide molecular insights into the auxin metabolism, transport and signaling research.
Wang
Yijun
Y
Key Laboratory of Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, 225009, China. yjwang61@163.com
Deng
Dexiang
D
Bian
Yunlong
Y
Lv
Yanping
Y
Xie
Qin
Q
D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D032461:Chromosomes, Plant / Q000235:genetics; D019295:Computational Biology; D020440:Gene Duplication / Q000187:drug effects; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D017343:Genes, Plant / Q000235:genetics; D018745:Genome, Plant / Q000187:drug effects / Q000235:genetics*; D007210:Indoleacetic Acids / Q000494:pharmacology*; D008969:Molecular Sequence Data; D005810:Multigene Family / Q000235:genetics*; D010802:Phylogeny; D010940:Plant Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D011401:Promoter Regions, Genetic / Q000235:genetics; D003313:Zea mays / Q000187:drug effects* / Q000235:genetics*
D007210:Indoleacetic Acids; D010940:Plant Proteins