Fig. 2

Comparison of the leaf stomatal density and stomatal aperture of cotton variety tolerant (XL22) or sensitive (XL17) to drought under the WW andWD conditions. A Leaf stomatal density of the two cotton varieties B Leaf stomatal aperture of the two cotton varieties. C Leaf impressions showing leaf stomatal apertere at two stages under WW and WD conditions on abaxial and adaxial surfaces. a and b. XL22 leaf at the seedling stage under WW and WD condition, respectively. c and d. XL22 leaf at the bud stage under WW and WD condition, respectively. e and f. XL17 leaf at the seedling stage under WW and WD condition, respectively. g and h. XL17 leaf at the bud stage under WW and WD condition, respectively. i, j, k and l, the adaxial surface of XL22 leaf corresponds to a, b, c and d. m, n, o and p, the adaxial surface of XL17 leaf corresponds to e, f, g and h. SS-22, XL22 leaves at seedling stage; SS-17, XL17 leaves at seedling stage; BS-22, XL22 leaves at bud stage; BS-17, XL17 leaves at bud stage. Error bars are standard errors. Values represent the means ± SE, n = 3. The data in Fig. 2A and B were analyzed by analysis of variance (ANOVA) and mean comparison between treatments was performed based on Duncan's multiple range method at 5% level. For Fig. 2A and B, different letters above the bars indicate statistically different (p < 0.05)