highly significantp < 0.001
Differences in the physiological indices Differences in the chlorophyll, soluble sugar, and sucrose contents The contents of chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids in the MS group exhibited a highly significant decrease ( p < 0.001), with reductions of 42.4%, 41.5%, 42.1%, and 37.0%, respectively, when compared with those in the NS group ( Fig. 1 ).