Abstract
Monospore germination in the marine red alga Smithora naiadum involves several cellular changes including formation of a cell wall and a number of vacuoles. A large amount of peripheral, rough endoplasmic reticulum and certain dictyosome populations appear to play an important role in wall construction, while other populations of dictyosomes appear to be involved in vacuole formation. Of special interest, since it has not been reported in the Rhodophyceae, is the occurrence of a crystalline matrix in some pyrenoids. In addition, the presence of microtubular spindle fibres is demonstrated. The alternative methods of holdfast formation in this alga are also discussed.
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