Influence of Drought Stress on Plant Growth and Sugar Accumulation in Fruit of Lycium barbarum L.
A study of the effect of different water stress on plant growth and sugar accumulation in fruit of Lycium barbarum aimed at providing theoretical basis for high-yield cultivating of this plant for the arid regions. The responses of plant growth, biomass allocation and sugar accumulation were studied in L. barbarum under normal irrigation, light drought, moderate drought and severe drought in a pot experiment. The results showed that the growth of new shoots, fruit, height and stem diameter was inhibited under drought stress. With the increasing of drought stress, the dry matter distribution in root and stem gradually increased, while that in branch, leaf and fruit considerably decreased. The fructose cumulant increased during fruit development under light drought, but the fructose and sucrose contents were reduced under moderate drought and severe drought at the maturity stage. The activities of invertase, sucrose phosphate synthase (SPS) and sucrose synthase (SS) were significantly reduced under drought at the maturity stage. The fructose content has significant correlations with the activities of SPS and invertase during fruit development. It is therefore suggested the soil moisture content more than 55% of field water capacity can promote the accumulation of sugar and improve the quality of fruit during the fruit development.
NETL
NSTL
万方数据
维普
