ArticleScientific reports2025
Deciphering drought tolerance in cotton genotypes through integrated morpho-physiological and biochemical markers at flowering stage.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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4 authors.
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Abstract
Drought stress is one of the major abiotic factors that severely limits global cotton yield by disrupting essential morpho-physiological and biochemical functions. In this study, forty genetically diverse cotton genotypes were evaluated under three irrigation levels: control (100% field capacity), moderate (60% FC), and severe drought (40% FC), during the flowering stage in a controlled glasshouse environment. Increasing drought intensity led to a gradual decline in growth and physiological attributes. Severe stress reduced shoot and root lengths by 61% and 52%, respectively, compared with the control. Similarly, the photosynthetic rate and relative water content decreased by 60% and 32%. Conversely, stress-induced biochemical responses intensified, with proline content rising by 57% and superoxide dismutase activity increasing 2.3-fold under severe drought, reflecting enhanced osmotic adjustment and antioxidant defense. Principal Component Analysis (PCA) helps to identify the variability patterns among all the analyzed traits, while Pearson correlation analysis and heatmap analysis are useful for evaluating the positive and negative relationships between the studied attributes and for visualizing the clustering patterns of the cotton accessions. In addition, the multi-trait genotype-ideotype distance index (MGIDI) identified genotypes G
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