Proteomic responses of rice young panicles to salinity

Aliasghar Dadashi Dooki, Franz J. Mayer-Posner, Hossein Askari, Abed Ali Zaiee, Ghasem Hosseini Salekdeh*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

133 Citations (Scopus)

Abstract

Rice (Oryza sativa) is most sensitive to salinity during the reproductive stage. We employed a proteomic approach to further understand the mechanism of plant responses to salinity at an early reproductive stage. Plants were grown in culture solution and salt stress imposed at panicle initiation. After 12 days of stress, young panicles were collected from control and salt stressed plants. The Na+ and K+ content of panicle and several yield components changed significantly in response to short-term salt stress. The collected panicles were sorted into three different sizes (7 ± 1, 11 ± 1, and 15 ± 1 mm) and their proteome patterns were analyzed using 2-DE in triplicates. The expression pattern of 13 proteins significantly changed in all panicle sizes in response to stress. MS analysis of salt responsive proteins and 16 other highly abundant proteins of panicle led to the identification of proteins involved in several salt responsive mechanisms which may increase plant adaptation to salt stress including higher constitutive expression level and up-regulation of antioxidants, up-regulation of proteins involved in translation, transcription, signal transduction, and ATP generation. To the best of our knowledge, this is the first proteome analysis of plant young panicle which may enhance our understanding of plant molecular responses to salinity. Proteome reference map of rice young panicle is available at http://www.proteome.ir.

Original languageEnglish
Pages (from-to)6498-6507
Number of pages10
JournalProteomics
Volume6
Issue number24
DOIs
Publication statusPublished - 1 Dec 2006
Externally publishedYes

Keywords

  • Oryza sativa
  • Oxidative stress
  • Panicle
  • Reproductive stage
  • Rice

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