Arid Zone Research ›› 2021, Vol. 38 ›› Issue (6): 1713-1721.doi: 10.13866/j.azr.2021.06.23

• Plant and Plant Physiology • Previous Articles     Next Articles

Effect of water stress on sugar accumulation and sucrose metabolism enzyme activities of greenhouse grape fruit

GAO Yanting(),ZHANG Rui(),LI Hongxia,WEI Pengcheng   

  1. College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, Gansu, China
  • Received:2021-01-04 Revised:2021-06-15 Online:2021-11-15 Published:2021-11-29
  • Contact: Rui ZHANG E-mail:gyt830717@gsau.edu.cn;zhr_1029@163.com

Abstract:

To analyze the effects of water stress on fruit sugar components and related metabolic enzyme activity, the greenhouse table grape Red Globe was used as test material in four water treatment field trials. The results showed that sugar accumulation of Red Globe grape fruit is dominated by hexose (fructose and glucose); when the fruit matures, the content of various sugars is highest under mild stress and lowest under severe stress. Sufficient water is supplied in the early period of fruit expansion and at the end of the expansion period. Mild stress during ripening and coloring periods helps accumulate effective sugars in the fruit. Mild stress promotes activity and quality of sucrose metabolizing enzymes in grape fruit to increase yield by 12.15%, while severe stress shows strong inhibition. Output levels reduced by 18.6%. Fruit sugar metabolism results from combined effects of related enzyme activities, which is indirectly regulated by water stress by affecting enzyme activities.

Key words: water stress, greenhouse grape, sugar accumulation, enzyme activity, fruit quality