Journal
PHYCOLOGICAL RESEARCH
Volume 56, Issue 1, Pages 39-45Publisher
WILEY
DOI: 10.1111/j.1440-1835.2008.00483.x
Keywords
Brazil; exotic species; germination; Kappaphycus alvarezii; recruitment; reproduction; tetraspore
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The carrageenophyte Kappaphycus alvarezii was introduced in 1995 and vegetatively propagated in Ubatuba, Sao Paulo State, Brazil, for the purpose of commercial cultivation. This species produces tetraspores mainly in the austral summer and fall. Tetraspore germination and survival were studied under different conditions of temperature, photon flux density, and photoperiod in the laboratory. Field experiments were also carried out. Although tetraspores of K. alvarezii germinated, they had low survival rates, most dying after 20 days. Recruitment of K. alvarezii tetraspores did not occur in experiments conducted in the field. The results indicated that the establishment of K. alvarezii via spore production in the natural environment of the south-east coast of Brazil is rather remote.
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