24-epibrassinolide and/or putrescine trigger physiological and biochemical responses for the salt stress mitigation in Cucumis sativus L

Q. Fariduddin, B. A. Mir, M. Yusuf, A. Ahmad

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

Brassinosteroids (BRs) and polyamines, well-established growth regulators, play a key role in abiotic stress response in plants. In the present study, we examined the role of 24-epibrassinolide (EBL, an active BR) and/or putrescine (Put) in the salt-induced stress in cucumber. The 15-d-old plants were exposed to 100 mM NaCl and they were subsequently treated by exogenous EBL and/or Put. The salt stress reduced significantly plant growth and gas-exchange parameters, and increased proline content and electrolyte leakage in the leaves. Toxic effects induced by salt stress were completely overcome by the combination of EBL and Put. EBL and/or Put treatments improved the growth parameters of the NaCl-treated plants, such as shoot length, root length, fresh and dry mass. Our data also indicated that applications of EBL and Put upregulated the activities of the antioxidant enzymes, such as catalase, peroxidase, and superoxide dismutase under salt stress.

Original languageEnglish
Pages (from-to)464-474
Number of pages11
JournalPhotosynthetica
Volume52
Issue number3
DOIs
Publication statusPublished - Sept 2014
Externally publishedYes

Keywords

  • Cucumis sativus
  • brassinosteroids
  • polyamines
  • salt stress

ASJC Scopus subject areas

  • Physiology
  • Plant Science

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