Effects of Exogenous Nitric Oxide on Fructan Anabolism and FBEs Expression in Wheat under Chilling Stress

doi:10.3969/j.issn.1000-7091.2013.02.002

Abstract

Abstract: The effects of exogenous NO on wheat(Triticum aestivum L.)growth,solubility sugar,fructan bio-synthesis metabolism etc. under 4℃ chilling stress were investigated in seedlings,subjected to different concentra-tions of sodium nitroprussiate(SNP,as nitric oxide donor) for 0,24,48,96 h. The results showed that,under chilling stress,exogenous NO could induce wheat weight,fructose,glucose,low DP fructan,total soluble sugar content and fructan:fructan 1-fructosyltransferase(FFT) activity. Moreover,NO could regulate thegene expression at this level in following ways:sucrose:sucrose 1-fructosyltransferase(1-SST) and sucrose:fructan 6-fructosyltransferase(6-SFT)gene expression were inhibited by high concentration of SNP while 1-FFT was induced. Our report owing that exogenous NO alleviated the negative effects of non-freezing low temperatures by regulating FEBs and accumulating fructans.

Key words: NO, Chilling stress, Wheat, Fructan, FBEs expression

CLC Number:

ZHANG Dai-jing, JIANG Li-na, SHAO Yun, LI Chun-xi, LI Ting-ting, YANG Shu-fang,gUO Tian. Effects of Exogenous Nitric Oxide on Fructan Anabolism and FBEs Expression in Wheat under Chilling Stress[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(2): 6-11. doi: 10.3969/j.issn.1000-7091.2013.02.002.

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