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|The Rhodophyta: some aspects of their biology. III|
Murray, S.N.; Dixon, P.S. (1992). The Rhodophyta: some aspects of their biology. III. Oceanogr. Mar. Biol. Ann. Rev. 30: 1-148
In: Oceanography and Marine Biology: An Annual Review. Aberdeen University Press/Allen & Unwin: Aberdeen. ISSN 0078-3218, more
Rhodophyta [WoRMS]; Marine
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Red algal biology is reviewed with emphasis on cellular biology, morphology, genetics, reproduction, life histories, and systematics. Red algal cell walls, calcification, pit plugs, chloroplasts, cell and tissue adhesions and fusions, protoplasts, specialised cells and structures, and chromosomes, nuclei, and cell division features are discussed. The limited information on red algal genetics and molecular biology, including hybridisation studies, is reviewed. Principles of thallus construction and development are evaluated together with the data available on cell division, cell enlargement and cell differentiation. and the adhesion and integration of filaments in pseudoparenchymatous florideophycids. The mechanisms of wound-healing and regeneration are described. The wide variety of asexual and sexual reproductive structures are detailed and evaluated. Information on asexual reproduction by spores and vegetative propagation is summarised. Sexual reproduction is reviewed and the various types of red algal life history are enumerated and discussed. Information on the life history is provided for 345 florideophycid taxa. Proposals for the evolution bf red algal life histories are presented and research on the environmental control of life-history events, with emphasis on photoperiodic responses, is analysed. A total of 46 photoperiodic responses (43 short-day, 2 long-day, and 1 dual day-length), most (38) of which involve the development or release of reproductive bodies, are identified for 42 red algal species. Views on red algal systematics have changed dramatically during the past decade. Remarks on the criteria used for taxonomic discrimination and evaluations of the status of the 17 (4 bangiophycid and 13 florideophycid) orders recognised in this review are presented.