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The Influence of Leaf Removal upon the Development of the Grain of Winter Wheat

P. R. WALPOLE and D. G. MORGAN
Annals of Botany
New Series, Vol. 38, No. 156 (June 1974), pp. 779-782
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/42758524
Page Count: 4
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The Influence of Leaf Removal upon the Development of the Grain of Winter Wheat
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Abstract

The paper describes the effects on grain development of the removal of half the flag leaf, the entire flag leaf and all the leaves from selected main shoots of a field crop of wheat, cultivar Maris Ranger, 7 days after anthesis. None of the treatments reduced grain weights in the 14 days following defoliation. Even in the next 14 days only the more severe defoliations reduced grain weight, with the most severe treatment causing the greatest reduction. Ultimately the rate of grain growth in plants on which only a half of the flag leaf had been removed also fell behind that of the controls. Final grain yields were in the order, control plants, > plants with half the flag leaf removed, > the entire flag leaf removed, > all the leaves removed. The significance of these results in interpreting the factors limiting grain growth in wheat is discussed.

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