Final grain weight is not limited by the activity of key starch-synthesising enzymes during grain filling in wheat.

ABSTRACT: Since starch is by far the major component of the mature wheat grain, it has been assumed that variation in the capacity for starch synthesis during grain filling can influence final grain weight. We investigated this assumption by studying a total of 54 wheat genotypes including elite varieties and landraces that were grown in two successive years in fields in the east of England. The weight, water content, sugars, starch, and maximum catalytic activities of two enzymes of starch biosynthesis, ADP-glucose pyrophosphorylase and soluble starch synthase, were measured during grain filling. The relationships between these variables and the weights and starch contents of mature grains were analysed. Final grain weight showed few or no significant correlations with enzyme activities, sugar leve

SUBMITTER: Fahy B 

PROVIDER: S-EPMC6255701 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature