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Annals of Botany 23: 297-306, 1959
© 1959 Annals of Botany Company

RESEARCH-ARTICLE

Spore Discharge in the Basidiomycetes

I. Periodicity of Spore Discharge by Trametes gibbosa Fr.

J. L. GAY, S. A. HUTCHINSON and J. TAGGART

Department of Botany, University of Glasgow

Variations in the rates of spore discharge from this fungus have been examined in controlled laboratory conditions, using apparatus designed to make a continuous record of the numbers of spores discharged by a strip of hymenium measuring approximately 4.5 cm. X o.1 cm. These records have been extended by a direct microscopic study of the numbers of spores falling through a small area below the hymenium during successive short periods.

Analysis of the continuous record has shown that at any one time the rate of spore discharge is not uniform over the whole hymenium, and that at any one site it ia not constant. The variation in the rate of discharge in any one site is rhythmical, with intervals of the order of 30 to 90 minutes between maxima. The small linear areas of hymenium which have been examined have shown nearly the same rhythm-overall, but the phase of this rhythm has differed at different sites in the area.


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