Please wait a minute...
J Integr Plant Biol, 2004, 46 (1): 51-57, Research Article
Diurnal Changes in Activities of Related Enzymes to Starch Synthesis in Grains of Winter Wheat
JIANG Dong, CAO Wei-Xing, DAI Ting-Bo, JING Qi

The conversion from sucrose to starch in grains is a key process during yield formation of wheat. In a field study, diurnal changes in ATP content and activities of enzymes catalyzing starch synthesis in grains of two winter wheat (Triticum aestivum L.) cv. Lumai 22 and Lumai 14 were investigated. The enzymes included sucrose synthase (SS; EC, ADP-glucose pyrophosphorylase (ADPGPPase; EC, soluble starch synthase (SSS), and starch granule-bound synthase (GBSS; EC Activities of these enzymes and ATP content showed obvious diurnal patterns. The enzyme activities were generally higher during the nighttime than the daytime, but ATP content showed an opposite pattern. It was found that the super-optimum air temperature could be partly responsible for the low enzyme activities during the daytime. The possible factors influenced the diurnal changes in activities of the enzymes for starch synthesis in wheat grain were discussed.

   Online on:
This Article
   Full Text  
   Full Text (PDF) 
   Supporting information
   E-mail Link to this Article
   Export Citation for this Article
Citing Articles
   Cited By
Google Scholar
   Articles by JIANG Dong
   Articles by CAO Wei-Xing
   Articles by DAI Ting-Bo
   Articles by JING Qi
   Articles by JIANG Dong
   Articles by CAO Wei-Xing
   Articles by DAI Ting-Bo
   Articles by JING Qi
Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail:
Copyright © 2020 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q