Effect of Sucrose Concentration on Growth and Relevant Physiological Characteristics of Ginger Plantlet in Vitro under High Light Intensity

ZHOU Ming1,LI Wei1,WEI Yu-xia1,GUAN Qiu-zhu1 and WANG Shao-hui2(1.College of Agronomy and Biotechnology,China Agriculture University,Beijing 100094,China;2.Plant Science and Technology Department,Beijing University of Agriculture,Beijing 102206,China)

Ginger plantlet in vitro;Sucrose concentration;Growth;Physiological characteristics

In order to study the effect of high sugar concentration on the growth of ginger plantlet in vitro under high light intensity(120 μmol·m-2·s-1),the effect of three different sucrose concentration(0%,1%,3%) on the relevant physiological characteristics of ginger plantlet in vitro was carried out.The results were as followed:as the sucrose concentration decreased,the fresh weight of stems and leaves,the fresh weight of root,the total fresh weight of the whole plant and the propagation coefficient decreased;the content of soluble sugar and starch of the two cultivars of plantlets decreased both in the roots and the leaves,while the soluble sugar and starch in the root declined faster than that of leaves;the growth of the root was restrained and the root/shoot ratio decreased.As the sucrose concentration decreased,the chlorophyll and carotenoid content in leaves reduced,the stomatal width and length increased,and the stomatal density decreased.