Characteristics of sucrose and hexose metabolism in relation to sugar accumulation in developing strawberry fruit
CHEN Jun-wei
QIN Qiao-ping
XIE Ming
JIANG Gui-hua
XU Hong-xia
CHENG Jian-hui
WU Jiang
Sun Chong-bo
Abstract：Studies were conducted with Tochiotome strawberry cultivar (Fragaria(x)ananassa cv. Tohiotome) grown in a plastic greenhouse for studying the roles of sucrose and hexose metabolizing enzymes in sugar accumulation in fruit. The strawberry fruit were sampled from 1 to 8 weeks after full blossom (WAFB). The contents of sucrose, glucose and fructose and the activities of sucrose phosphate synthase (SPS), sucrose synthase (SS), acid invertase (AI), neutral invertase (NI), hexokinase (HXK) and fructokinase (FRK) were measured in developing strawberry fruits. The results showed that the total sugar content increased with fruit development. The rapid increase in sucrose content contributed to the majority of sugar accumulation at the late stage of fruit development. The AI activity decreased with fruit development at early stages, but increased when fruit ripening, resulted in hexoses being the dominant sugars. Rapid accumulation of sucrose occurred when the activities of SPS and SS became relatively low, indicating that SPS- or SS-catalyzed sucrose synthesis had little contribution on sucrose accumulation in Tochiotome strawberry fruit. Lower activities of HXK and FRK were favorable for rapid sugar accumulation.
Keywords：Strawberry (Fragaria(x)ananassa)Sucrose metabolismHexose metabolismSugar accumulation
Publication Date：2007-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 49-54 )