Analysis of the Inclusion in Xylem Sap and the Effects on Grape Growth

Growth of grapevine and fruit quality was compared with the treatment of bleeding sap, to explore the influence of xylem sap on the grape growth and development. By the analysis on growth dynamics, it was found that xylem sap postponed the phenophase, decreased the rate of germination and the growth of new shoot, and the shedding of flowers and fruitlets was higher than control group. For fruit quality, bleeding of xylem sap decreased the cluster weight, and heavy bleeding also decreased the weight of single fruit and content of soluble solids. Therefore, attention must be paid to the bleeding of xylem sap in order to reduce the undesirable influence to grapevine. The inclusion in the xylem sap of grape was analyzed by different methods with different instruments. On the basis of previous research, the different of the inclusion in xylem sap between different varieties or times was compared, which can provide the base for the insight of the roles of xylem sap during grape growth and development.

Author(s): Zhenqiang Xie, Ting Zheng, Xudong Zhu, Xiaopeng Li, Haifeng Jia, Jinggui Fang

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