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Acta Agron Sin ›› 2010, Vol. 36 ›› Issue (4): 688-694.doi: 10.3724/SP.J.1006.2010.00688

• TILLAGE & CULTIVATION · PHYSIOLOGY & BIOCHEMISTRY • Previous Articles     Next Articles

Whole-Genome Sequence Characterization of Primary Auxin-Responsive Aux/IAA Gene Family in Sorghum (Sorghum bicolor L.)

WANG Yi-Jun,LÜ Yan-Ping,XIE Qin,DENG De-Xiang,BIAN Yun-Long   

  1. College of Agriculture, Yangzhou University / Key Laboratory of Crop Genetics and Physiology, Jiangsu Province / Key Laboratory of Plant Functional Genomics, Ministry of Education, Yangzhou 225009, China
  • Received:2009-12-03 Revised:2010-02-06 Online:2010-04-12 Published:2010-03-03

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Abstract:

The phytohormone auxin plays an important role in organism growth, development and differentiation. Membersof Aux/IAA gene family are responsive primarily to auxin induction. Despite the physiological importance, sequence characterization of Aux/IAA genes has not yet been reported in sorghum. Herein, we presented the isolation and characterization of Aux/IAA genes from sorghum using bioinformatic method. A total of 25 Aux/IAA gene family members were distributed on nine chromosomes in sorghum except chr. 6. Sequence alignment and phylogenetic analysis showed major sorghum Aux/IAA proteins shared four conserved domains. There were nineteen pairs of sorghum / maize and two pairs of sorghum / rice Aux/IAA proteins which were in the same clades of the dendrogram. Aux/IAA proteins partly demonstrated in maize is the closest relative of sorghum in the grass family. The results will be helpful to the auxin signal transduction cascade investigation and gene family research in other crops.

Key words: Sorghum, Auxin, Aux/IAA gene family, Comparative genomics

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