The Research On Increasing Of Root Weight And Sugar Based Material And Energy Metabolism In Sugarbeet(Beta Vulgaris L.)

The different genotypes of sugar beet as the research material, we reported photosynthetic characteristics、accumulation and distribution、the respiratory-metabolizing enzymes activities and their gene expression, and the role of the physiological metabolism in increasing root and sugar content. Focused on substantial metabolism and energy metabolism, we aimed to illuminate the physiological basis of increasing root and sugar content. The theoretic basis and physiological indexes of physiological selection can be provided for high yield and sugar content, and illuminated mechanism of increasing root and sugar content. The results are as follows:1. There are differences in photosynthetic characteristics of different genotypes of sugar beet at different growth stage in foliage. Root weight was positively correlated with foliage intercellular CO2concentration and SPAD. Sugar content was positively correlated with foliage transpiration rate.2.There are differences in the respiratory-metabolizing enzymes activities(ATPase、PDH、G-6-PD和ICD) of different growth stages and different parts of different genotypes of sugar beet. The respiratory-metabolizing enzymes activities is higher in the root and foliage of high yield varieties than it in high sugar varieties, but it is higher in the period of high sugar varieties than it in high yield varieties.3.The expression of ATPase、PDH和ICD of different genotypes of sugar beet in root and foliage was positively correlated with enzyme activity and also involved in the regulation of sugar beetroot weight growth.