Role of Cytokinins and Gibberellins in Crops response to Heat and Drought stress


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Authors

  • Anukriti Srivastava
  • Girish Chandra Pandey

Keywords:

Cytokinins, Gibberellins, Crops, Heat and Drought stress

Abstract

Drought and Heat work together as a coupled form of stresses from abiotic components that decline crop production and create global food insecurity under changing climatic regime. Plants have evolved dynamic morphological, anatomical and syntheticresponses thatenable them to resist heat and drought stress. Even minor heat and drought stress can have a detrimentalimpact on crop productivity.Currently, the rise in the temperature and drought have been provenbyresearch to affect agricultural yields by as much as 40%. Abiotic stresses cause plants to activate a genetic programme that favours survival through the development of robust adaptation mechanisms. Cytokinins and Gibberellins are plant hormones that control a variety of biological processes, including growth and development. Cytokinins and gibberellins have beendiscoveredfor their keyfunction in plant responses to heat stress. Under heat stress, leaf cooling is performed by increased transpiration. Cytokinins play a vital part in this reaction by promoting stomatal opening, which aids in transpiration.There are various proteins that response to heat for example- sHSPs and GLY-rich proteins,are activated by cytokinins under thermal stress.The use of cytokinins enhancesthermo-tolerance by lowering the rates of abortion in flowers.The hindrance of heat stress is induced in seed germination and its growth is alleviated byexogenous application of gibberellins.According to a recent study, cytokinins have apart inosmotic stress adaptations with increased plant growth and production, while gibberellinplays a key function as growth hormone and confers heat and drought stress tolerance in crops.The external application and propagation of diverse plant hormones at optimal can help to reduce thermal stress and protect agriculture in adverse change in climate. Because the development of stress tolerance necessitates the activation of hormone-responsive genes in a specific tissue, and hence targeted modification of the plant hormone pool has a better efficacy for modulating plant responses to heat stress.

Phytohormones play a crucial role in imparting heat and drought resistance, establishing a part for a hormone in preserving crop production from heat and drought stress may playimportant role in breeding programs as well as field application of phytohormones

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Submitted

2023-05-06

Published

2024-01-08

Issue

Section

Review Article

How to Cite

Role of Cytokinins and Gibberellins in Crops response to Heat and Drought stress. (2024). Journal of Cereal Research, 15(2). https://epubs.icar.org.in/index.php/JWR/article/view/136065

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