Journal of Plant Biology

, Volume 53, Issue 2, pp 134–141 | Cite as

Cloning and Characterization of Functional Trehalose-6-Phosphate Synthase Gene in Maize

  • Wei Jiang
  • Feng-Ling Fu
  • Su-Zhi Zhang
  • Ling Wu
  • Wan-Chen Li
Original Research

Abstract

Trehalose is a non-reducing disaccharide of glucose that functions as a compatible solute in the stabilization of biological structures under heat and desiccation stress in bacteria, fungi, and some “resurrection plants”. In the plant kingdom, trehalose is biosynthesized by trehalose-6-phosphate synthase (TPS) and trehalose-6-phosphate phosphatase (TPP). Over-expression of exogenous and endogenous genes encoding TPS and TPP is reported to be effective for improving abiotic stress tolerance in tobacco, potato, tomato, rice, and Arabidopsis. On the basis of bioinformatics prediction, we cloned a fragment containing an open reading frame of 2,820 bp from maize, which encodes a protein of 939 amino acids. Phylogenetic analysis showed that this gene belongs to the class I subfamily of the TPS gene family. Analysis of conserved domains revealed the presence of a TPS domain and a TPP domain. Yeast complementation with TPS and TPP mutants demonstrated that this protein has the activity of trehalose-6-phosphate synthase. Semi-quantitative RT-PCR and real-time quantitative PCR indicated that the expression of this gene is upregulated in response to both salt and cold stress.

Keywords

Maize Trehalose-6-phosphate synthase Salt stress Cold stress 

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Copyright information

© The Botanical Society of Korea 2010

Authors and Affiliations

  • Wei Jiang
    • 1
  • Feng-Ling Fu
    • 1
  • Su-Zhi Zhang
    • 1
  • Ling Wu
    • 1
  • Wan-Chen Li
    • 1
  1. 1.Maize Research InstituteSichuan Agricultural UniversityYa’anChina

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