WALL STRUCTURE AND LATERAL FORMATION IN THE ALGA BRYOPSIS

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Abstract
Green, Paul B. (U. Pennsylvania, Philadelphia.) Wall structure and lateral formation in the alga Bryopsis. Amer. Jour. Bot. 47(6) : 476–481. Illus. 1960.—The large multinucleate cells of Bryopsis pennata regularly produce laterals at the apical tip. Cells were freed of protoplasm and the remaining cell wall was flattened and studied in polarized light and interference microscopes. Both the cylindrical main axis and the cylindrical laterals are negatively birefringent and thus apparently have generally a transverse arrangement of microfibrils. Lateral formation is first seen in the formation of round fields of concentric microfibrils on the main axis which persist as lateral‐bases. The center of a field protrudes, making a small out‐pouching of the main axis. The thin‐walled protrusion increases first mostly in diameter and then in length to make a lateral. There is a definite correlation between wall structure (optical anisotropy) and cell shape in Bryopsis.
Funding Information
  • National Science Foundation (NSF G–5944)

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