Drought coping strategies in cotton: increased crop per drop

Area of Science:

• Agricultural Science
• Plant Physiology
• Molecular Biology

Background:

• Water deficit significantly impacts crop growth and yield, especially in cotton.
• Cotton exhibits diverse morpho-physiological, biochemical, and molecular adaptations to drought stress.

Purpose of the Study:

• To review the natural and engineered strategies for enhancing drought tolerance in cotton.
• To elucidate the key physiological and molecular responses of cotton to water deficit.

Main Methods:

• Literature review of identified physiological responses.
• Analysis of molecular mechanisms including gene expression and signaling pathways.
• Discussion of genetic and exogenous approaches for drought tolerance.

Main Results:

• Key physiological responses include stomatal closure, root development, and altered photosynthesis.
• Molecular responses involve stress-related transcription factors, genes (e.g., ROS scavenging, ABA, MAPK signaling), and pathways.
• Quantitative trait loci (QTL) analysis and transgenic approaches are vital for trait improvement.

Conclusions:

• Understanding cotton's drought response mechanisms is crucial for developing resilient crop varieties.
• Both natural adaptations and engineered strategies, including genetic modification and exogenous applications, are essential for improving drought tolerance in cotton.