J Integr Plant Biol ›› 2013, Vol. 55 ›› Issue (7): 643-653.DOI: 10.1111/jipb.12068

• Research Articles • Previous Articles     Next Articles

Genome-Wide Analysis of the Sus Gene Family in Cotton

Changsong Zou1,2, Cairui Lu1,2, Haihong Shang1,2, Xinrui Jing1, Hailiang Cheng1, Youping Zhang1 and Guoli Song1,2*   

  1. 1State Key Laboratory of Cotton Biology, Anyang, Henan, China
    2Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, Henan, China
  • Received:2013-04-01 Accepted:2013-05-15 Published:2013-07-01
  • About author:*Corresponding Author: Tel: +86 372 2562 377; Fax: +86 372 2562 375; E-mail: sgLzms@163.com

Abstract:

Sucrose synthase (Sus) is a key enzyme in plant sucrose metabolism. In cotton, Sus (EC 2.4.1.13) is the main enzyme that degrades sucrose imported into cotton fibers from the phloem of the seed coat. This study demonstrated that the genomes of Gossypium arboreum L., G. raimondii Ulbr., and G. hirsutum L., contained 8, 8, and 15 Sus genes, respectively. Their structural organizations, phylogenetic relationships, and expression profiles were characterized. Comparisons of genomic and coding sequences identified multiple introns, the number and positions of which were highly conserved between diploid and allotetraploid cotton species. Most of the phylogenetic clades contained sequences from all three species, suggesting that the Sus genes of tetraploid G. hirsutum derived from those of its diploid ancestors. One Sus group (Sus I) underwent expansion during cotton evolution. Expression analyses indicated that most Sus genes were differentially expressed in various tissues and had development-dependent expression profiles in cotton fiber cells. Members of the same orthologous group had very similar expression patterns in all three species. These results provide new insights into the evolution of the cotton Sus gene family, and insight into its members' physiological functions during fiber growth and development.

Zou C, Lu C, Shang H, Jing X, Cheng H, Zhang Y, Song G (2013) Genome‐wide analysis of the Sus gene family in cotton. J. Integr. Plant Biol. 55(7), 643–653.

Key words: Expression, fiber, Gossypium, phylogenetic, sucrose synthase

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