OBSERVATION ON THE ECOLOGY AND REPRODUCTION OF FREE-LIVING CONCHOCELIS OF PORPHYRA TENERA

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Abstract
A new part of the life-cycle of P. tenera is described. Free-living Conchocelis colonies under long-day conditions produce new Conchocelis colonies by means of several types of reproductive bodies: (a) inflated spherical cells which discharge single spores; (b) strawberry-like structures which produce new Conchocelis either from internal cells of this structure or from unicellular ameboid spores released during disintegration (with the new Conchocelis colonies producing in turn monosporangia and liberating monospores that germinate into normal leafy thalli under short-day conditions; (c) special sporangia, whose spores develop into various "plantlets." The spherical cells and the strawberry-like structures are produced at temperatures above 18[degree]C and under long-day conditions.

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