Abstract
One of the challenges facing fruit crop production globally is the
regional climate regimes are becoming more unpredictable year after year
leading to various type of stress. The exact impact of these stress on
fruit crops is difficult to predict. Plant hormones can improve
tolerance against abiotic stresses by inhibiting or reducing the active
oxygen (AOS) accumulation, electrolyte leakage, induce the expression of
stress-specific genes, etc. Among the major hormones produced by the
plants, ABA, SA, JA and ET are known to play major roles in mediating
plant defence response against various abiotic stresses. Crosstalk
networks among phytohormones mediated by diverse key regulators have
been extensively investigated and documented in various research
investigations. Many canvassers’ recommended the use of phytohormones to
counteract abiotic stress as increasing stress tolerance through
conventional breeding methods requires longer time and also leads to
inadequate adoptability of such cultivars under diverse cultivation
environment for validation of performance and heritability. In this
review, we summarize the roles of the major phytohormones present in
fruit crops in regulating abiotic stresses responses with special focus
on the significance of crosstalk between various hormones at biochemical
and molecular level in generating a sophisticated and efficient stress
response.