Life history of Chaetomorpha valida (Cladophoraceae, Chlorophyta) in culture
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Yunyan Deng
Abstract
The marine green alga Chaetomorpha valida (Cladophoraceae, Cladophorales) has been found for several years fouling aquaculture ponds along coasts of the cities Dalian and Rongcheng, P.R. China. Using unialgal culture and microscopic observation, we completed the life history of C. valida and discovered fragment regeneration for the first time. The life history comprised an isomorphic alternation between gametophytes and sporophytes typical of most other members of the Cladophorales. Male and female gametes fused into zygotes then developed into sporophytes. Quadriflagellate zoospores produced by mature sprophytes gave rise to new gametophytes that yielded biflagellate gametes. Germination of zygotes and zoospores was of the bipolar erect type, as observed in some other species of Chaetomorpha. Fragment regeneration occurred in both gametophytes and sporophytes via production of polar algal fragments, which directly developed into entire filaments to give a self-replicating generation. The results improved understanding of the seasonal abundances of C. valida in spring and summer.
©2011 by Walter de Gruyter Berlin Boston
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- Research Articles
- Iberian intertidal turf assemblages dominated by Erythroglossum lusitanicum (Ceramiales, Rhodophyta): structure, temporal dynamics, and phenology
- Checklist of marine benthic green algae (Chlorophyta) on Hainan, a subtropical island off the coast of China: comparisons between the 1930s and 1990–2009 reveal environmental changes
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- Ceramium cormacii sp. nov. (Ceramiaceae, Rhodophyta), a new Mediterranean species epizoic on loggerhead sea turtles (Caretta caretta)
- Life history of Chaetomorpha valida (Cladophoraceae, Chlorophyta) in culture
- Identification of hypo-osmotically induced genes in Kappaphycus alvarezii (Solieriaceae, Rhodophyta) through expressed sequence tag analysis
- Morphological variation in a small Thalassiosira species (Bacillariophyta) under different culture regimes
- Occurrence of the seagrass Halophila stipulacea (Hydrocharitaceae) in the southern Mediterranean Sea
- Reproductive biology of a natural mangrove hybrid Rhizophora annamalayana and its parent species (R. apiculata and R. mucronata) (Rhizophoraceae)
