Rapid leaf growth in wheat and its links with flowering.
1991
Rawson H.M.
It has been suggested that rapid leaf growth in pasture grasses is linked with the change from vegetative to floral development. A number of experiments designed to test the hypothesis in wheat found: (a) induction of floral initiation by 3 long days at any plant age resulted in accelerated leaf expansion and relative growth rate; (b) at equivalent plant age, when a winter isoline was apparently vegetative and a spring one clearly floral, whole-plant relative leaf expansion rates were not significantly different between the isolines though tillering was much less in the spring one; (b) photoperiod treatments that were not sufficient to induce flowering resulted in ephemeral increases in leaf expansion rate, followed by compensatory reductions. It is suggested that rapid leaf expansion and floral development are not linked, although both can be initiated by extended photoperiods rich in far-red radiation. The relevance of this to selection of genotypes with rapid early growth is discussed.
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