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Annals of Botany 41: 1323-1331, 1977
© 1977 Annals of Botany Company

RESEARCH-ARTICLE

Mitochondrial Efficiency and Grain Yield in Wheat

R. B. FLAVELL and D. H. P. BARRATT1

Department of Cytogenetics Plant Breeding Institute Trumpington, Cambridge CB2 2LQ

1 Present address: Department of Plant Sciences, Baines Wing, University of Leeds, Leeds LS2 9JT, England.

Received: 7 February 1977   

Mitochondrial ADP/O and RC ratios have been determined in two-day-old shoots of nine wheat (Triticum aestivum) varieties of known average grain yield. Both ratios were highly correlated with average grain yield. ADP/O and RC ratios of germinating shoots were also correlated with yield within a variety when yield was varied by irrigation and different nitrogen fertilizer treatments. It is proposed that the observed correlations are the result of mitochondrial ADP/O and RC ratios being partly controlled during germination directly or indirectly by seed-based metabolism which reflects the metabolic activity and total carbohydrate deposited in seed during seed formation.


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