Physiological indicators of water metabolism in plants of parental forms and F₁ hybrids of G. Barbadense L. cotton type under different water supply conditions

¹ Institute for Genetics and Plants Experimental Biology at the Science Academy of the Republic of Uzbkistan, Tashkent, 100140, Uzbekistan
² Tashkent State Agrarian University, Tashkent, 100140, Uzbekistan

^* Corresponding author: m.saydigani@mail.ru

Abstract

This article presents the findings of an extensive research endeavor aimed at comprehending the physiological intricacies of water metabolism in novel strains of fine-fiber cotton belonging to the species Gossypium barbadense L. These strains include L-2006, L-167, L-5440, L5445, L-1, L-10, L-663, and L-450, alongside the standard variety Surkhan14 and its F1 hybrids. The study was conducted under various water regime conditions to unravel the responses of these cotton genotypes to different levels of water availability. Upon analysis, it was discerned that the physiological parameters of water metabolism exhibited dynamic changes across the studied genotypes of fine-staple cotton. Specifically, when confronted with simulated soil drought conditions, the water content and transpiration intensity of leaves demonstrated varying degrees of reduction. This response was contingent upon the individual characteristics of each genotype. Furthermore, a noteworthy trend emerged: the water-retaining capacity of leaves displayed an increase under water stress conditions. This observed rise in water-retaining capacity in the leaves can be considered a vital physiological mechanism. It’s a mechanism that contributes to the adaptation of fine-staple cotton to water stress. These findings offer valuable insights into the strategies employed by fine-fiber cotton genotypes to cope with water scarcity. By shedding light on the interplay between physiological responses and water availability, this research provides a foundation for informed decision-making in cotton breeding, agricultural management practices, and the cultivation of drought-resistant cotton varieties.