Contrasting Drought Tolerance in Two Apple Cultivars Associated with Difference in Leaf Morphology and Anatomy
American Journal of Plant Sciences (AJPS)
for Honeycrisp, only a slight drop in photosynthesis.
Similarly, stomatal conductance (Gs), intercellular CO2 concentration (Ci), transpiration rate (Tr) were markedly reduced in Yanfu
3 under drought stress. However,
Honeycrisp showed only minor changes. Under drought stress, the contents of Chl
a, Chl b and Chl t in
Yanfu 3 were all decreased significantly compared with the control. However,
little difference in Honeycrisp was noted between stressed plants and controls.
Values for WUE in stressed Yanfu 3 remained higher than in the controls from
day 3 until the end of the experiment, while no significant difference was
observed in Honeycrisp. Furthermore, Honeycrisp also exhibited superior
physiological traits, as indicated by its anatomical and morphological
characteristics. Therefore, we conclude that the superior drought tolerance of
Honeycrisp was due to its anatomical and morphological characteristics, which
possibly contributed to the maintenance of higher photosynthetic capacity than