Low-temperature stress: is phytohormones application a remedy?

Tanveer Alam Khan, Qazi Fariduddin, Mohammad Yusuf

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Among the various abiotic stresses, low temperature is one of the major environmental constraints that limit the plant development and crop productivity. Plants are able to adapt to low-temperature stress through the changes in membrane composition and activation of reactive oxygen scavenging systems. The genetic pathway induced due to temperature downshift is based on C-repeat-binding factors (CBF) which activate promoters through the C-repeat (CRT) cis-element. Calcium entry is a major signalling event occurring immediately after a downshift in temperature. The increase in the level of cytosolic calcium activates many enzymes, such as phospholipases and calcium dependent-protein kinases. MAP-kinase module has been shown to be involved in the cold response. Ultimately, the activation of these signalling pathways leads to changes in the transcriptome. Several phytohormones, such as abscisic acid, brassinosteroids, auxin, salicylic acid, gibberellic acid, cytokinins and jasmonic acid, have been shown to play key roles in regulating the plant development under low-temperature stress. These phytohormones modulate important events involved in tolerance to low-temperature stress in plants. Better understanding of these events and genes controlling these could open new strategies for improving tolerance mediated by phytohormones.

Original languageEnglish
Pages (from-to)21574-21590
Number of pages17
JournalEnvironmental Science and Pollution Research
Volume24
Issue number27
DOIs
Publication statusPublished - Sep 1 2017
Externally publishedYes

Keywords

  • Low-temperature stress
  • Phytohormone
  • Protein kinase
  • Signal transduction
  • Transcription factor

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

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