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Expression ofsHSPgenes as affected by heat shock and cold acclimation in relation to chilling tolerance in plum fruit

Authors
Journal
Postharvest Biology and Technology
0925-5214
Publisher
Elsevier
Publication Date
Volume
55
Issue
2
Identifiers
DOI: 10.1016/j.postharvbio.2009.09.001
Keywords
  • Plum Fruit
  • Chilling Injury
  • Small Heat Shock Protein
  • Gene Expression
Disciplines
  • Biology

Abstract

Abstract Three full-length cytosol small heat shock protein (sHSP) genes, including two class I sHSP (CI sHSP) and one class II sHSP (CII sHSP) cDNAs, termed Ps-CI sHSP1, Ps-CI sHSP2 and Ps-CII sHSP1 respectively, were isolated and characterized from plum fruit at harvest. Their expression in relation to heat shock and cold acclimation-induced chilling tolerance were investigated. Heat shock treatment by dipping the fruit in water at 55 °C hot for 2 min and cold acclimation by conditioning the fruit at 8 °C for 5 d prior to storage at 2 °C could effectively reduce malondialdehyde (MDA) content and alleviate chilling injury. Furthermore, accumulation of Ps-CII sHSP1 mRNA transcripts in the fruit during the subsequent storage at 2 °C was remarkably enhanced by heat shock and cold acclimation treatments. These data suggest that heat shock and cold acclimation treatments induced the expression of Ps-CII sHSP1, which may be involved in chilling tolerance of the fruit caused by these treatments.

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