GrainGenes Reference Report: ASI-30-916
Reference
ASI-30-916
Title
The relationship between source-sink intensity and starch accumulation during grain filling period in two winter wheat cultivars with different spike types
Journal
Acta Agronomica Sinica
Year
2004
Volume
30
Pages
916-921
Author
Wang W
Abstract
Two rice cultivars, i.e. Yumai 66 (a large-spike type) and Yumai 49 (a small-spike type), were used to study the relationship between their source-sink intensity and starch accumulation during grain filling stage. The changes in photosynthetic rate, sucrose content and sucrose-phosphate synthase activity in flag leaf of the 2 cultivars showed a single-peak curve, but Yumai 66 reached the peak a little later than that of Yumai 49, and then declined slowly during later filling stage. It showed that the 'source' of Yumai 66 had stronger supplying ability of assimilator compared with that of Yumai 49. The changes of sucrose content and sucrose synthase activity in kernels of both cultivars exhibited a single-peak curve, but Yumai 66 reached the peak 5 days later than that of Yumai 49. ADP-glucose pyrophophorylase [glucose-1-phosphate adenylyltransferase] activity in kernels also showed a single-peak curve; the peak appeared at 20 days after flowering. The peak of starch accumulation of Yumai 66 appeared later than that of Yumai 49, but the starch accumulated and the starch accumulation rate in Yumai 66 were higher than that of Yumai 49 during middle and later filling stages, indicating that the 'sink' intensity of Yumai 66 was stronger than that of Yumai 49 in the later filling stage
Keyword
cultivar
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GrainGenes Reference Report: ASI-30-916
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||