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

Journal of Experimental Botany
Brendan FahyAlison M Smith

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 levels, or starch content during grain filling, or with starch content at maturity. We conclude that neither sugar availability nor enzymatic capacity for starch synthesis during grain filling significantly influenced final grain weight in our field conditions. We suggest that final grain weight may be largely determined by developmental processes prior to grain filling. Starch accumulation then fills the grain to a physical limit set by developme...Continue Reading

References

Aug 22, 1997·Science·S D Tanksley, S R McCouch
May 22, 2001·The Plant Journal : for Cell and Molecular Biology·J H CritchleyS M Smith
Feb 7, 2002·Proceedings of the National Academy of Sciences of the United States of America·Eric D SmidanskyMichael J Giroux
Jul 28, 2005·Proceedings of the National Academy of Sciences of the United States of America·Anna KolbePeter Geigenberger
Aug 24, 2007·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·H KuchelS P Jefferies
Apr 14, 2009·Journal of Experimental Botany·Matthew ReynoldsWilliam J Angus
Jan 1, 2009·International Journal of Plant Genomics·Boryana S StamovaDiane M Beckles
Mar 23, 2013·Genome Génome / Conseil National De Recherches Canada·Guo-Zhang KangTian-Cai Guo
Aug 31, 2013·Plant Science : an International Journal of Experimental Plant Biology·Aytug Tuncel, Thomas W Okita
Jul 6, 2014·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Luzie U WingenSimon Griffiths
Aug 8, 2015·Journal of Experimental Botany·Quan XieDebbie L Sparkes
Feb 13, 2016·Plant Physiology·Philippa BorrillCristobal Uauy
Feb 18, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·James SimmondsCristobal Uauy
Dec 16, 2016·Nature·Cara A GriffithsBenjamin G Davis
Mar 8, 2017·Molecular Plant·Nicolas M DollThomas Widiez

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