Comparative proteomic analysis of canola leaves under salinity stress

Ali Bandehagh, Ghasem Hosseini Salekdeh, Mahmoud Toorchi, Abolghasem Mohammadi, Setsuko Komatsu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

Abstract

Although canola is a moderately salt-tolerant species, its growth, seed yield, and oil production are markedly reduced under salt stress, particularly during the early vegetative growth stage. To identify the mechanisms of salt responsiveness in canola, the proteins expressed in the second and third newly developed leaves of salt-tolerant, Hyola 308, and salt-sensitive, Sarigol, cultivars were analyzed. Plants were exposed to 0, 175, and 350mM NaCl during the vegetative stage. An increase in the Na content and a reduction in growth were observed in the third leaves compared to the second leaves. The accumulation of Na was more pronounced in the salt-sensitive compared with the salt-tolerant genotype. Out of 900 protein spots detected on 2-DE gels, 44 and 31 proteins were differentially expressed in the tolerant and susceptible genotypes, respectively. Cluster analysis based on the expression level of total and responsive proteins indicated that the second leaves had a discriminator role between the two genotypes at both salinity levels. Using MS analysis, 46 proteins could be identified including proteins involved in responses to oxidative stress, energy production, electron transport, translation, and photosynthesis. Our results suggest that these proteins might play roles in canola adaptation to salt stress.

Original languageEnglish
Pages (from-to)1965-1975
Number of pages11
JournalProteomics
Volume11
Issue number10
DOIs
Publication statusPublished - 1 May 2011
Externally publishedYes

Keywords

  • Canola
  • Oxidative stress
  • Plant proteomics
  • Salinity

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