SEASONAL CYCLES OF GROWTH AND TETRASPORE FORMATION IN GLOSSOPHORA-KUNTHII (PHAEOPHYTA, DICTYOTALES) FROM PACIFIC SOUTH-AMERICA - FIELD AND LABORATORY STUDIES
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1990
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Abstract
The seasonal patterns of growth and tetraspore formation in Glossophora kunthii (C. Agardh) J. Agardh were determined in plants collected in central Chile (32.degree.57'' to 33.degree.15''S) and compared with results obtained from cultures under laboratory conditions. The prostate phase of G. kunthii is apparently perennial. Erect fronds grow during winter. In some locations fronds are persistent, in others they disappear in summer, probably due to local environmental factors. Plants collected in the field showed two peaks of maximal tetraspore formation, in August-October and in January. Ligulae cultured under controlled experimental conditions showed seasonal variations in fertility similar to plants in the field, through the peaks appeared earlier.