Leaf hydraulic decline coordinates stomatal and photosynthetic limitations through anatomical adjustments under drought stress in cotton.

Effect of drought stress on hydraulic traits of cotton plants As the degree and duration of drought stress increased, K leaf showed a decreasing trend compared with CK ( Figure 3A ), and by day 14 of drought treatment, a significant difference was observed, with K leaf reduced by 7.17% and 18.77% in the MD and SD treatments, respectively, compared with CK.

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This experiment demonstrated that g s was significantly and positively correlated with stomatal width, stomatal area, and stomatal aperture, but it showed a highly significant negative correlation with stomatal density ( Supplementary Figure S4A–D ).

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