PJB-2019-805
Increased sugar content and CCS in sugarcane by water stress
Sutsawat Duangsrisai
Abstract
Background. In this study, the effects of water-deficit stress on sucrose accumulation and physiological changes on sugarcane were studied. Methods. Four month-, seven month- and ten month-sugarcane var. Kampaengsaen 01-12 were treated with water stress. The levels of water stress were divided into 4 groups; control, withholding 10 days, 20 days and 30 days. After the water stress exposure period, sugarcanes were re-watered. At harvesting time, the chlorophyll fluorescence and SPAD value were investigated. The growth parameters such as the height, the number of nodes and the weight and the values related with the sweetness of sugarcane such as Brix, Pol and CCS of each treatment were also measured Results. Water stress did affect photosystem II and chlorophyll content significantly at Day 30. It was found that the weight of sugarcane from each treatment was not significantly different. Water stress treatment on 7 month-sugarcane seemed to promote elongation regardless the level of withholding water. However, 7 month-sugarcane sugarcanes treated with 30 days no watering had the lowest number of nodes (14.33 nodes/plant), significantly different (p< 0.05) from the control which had 19.33 nodes/plant. The value of Brix, Pol and CCS were affected by water stress. For Brix, Pol and CCS, most treatments showed low value of Brix except the sugarcane that was treated with water stress at 10 month-old for 30 days. This treatment showed higher values for Brix, Pol and CCS (16.03 for Brix , 14.5 for Pol and 11.55 for CCS) than that of the control (14.39 for Brix, 14.5 for Pol and 10.95 for CCS). Brix value in this treatment differed significantly, whereas Pol and CCS did not.
To Cite this article:
Download
