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Annals of Botany 23: 345-349, 1959
© 1959 Annals of Botany Company

RESEARCH-ARTICLE

Photoperiod and Fertility in Rottboellia exaltata L.f.

J. HESLOP-HARRISON

Department of Botany, Queen's University Belfast

In the short-day grass Rottboellia exaltata L.f., one of the flowers of the sessile spikelet at each node of the inflorescence is morphologically male and the other hermaphrodite. When plants are exposed to 12 weeks of long days before induction to flower in short days, the male flower is sterile, and self-pollination occurs in the hermaphrodite flower before exsertion of the anthers. With 17 weeks of long days before exposure to short days, the male flower becomes fertile in the first-formed inflorescences, and some of the hermaphrodite flowers are probably open to cross-pollination.


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