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Estudos sobre a libertação de tetrasporos em Padina tetrastromatica Hauck
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ISBN10: 6209922716
ISBN13: 9786209922718
Publisher: Edicoes Nosso Conhecimento
Published: May 6 2026
Pages: 52
Weight: 0.18
Height: 0.12 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786209922718
Publisher: Edicoes Nosso Conhecimento
Published: May 6 2026
Pages: 52
Weight: 0.18
Height: 0.12 Width: 6.00 Depth: 9.00
Language: Portuguese
Os estudos sobre a libertação de tetrasporos revelaram variações sazonais nesta alga parda, com um pico de libertação de esporos no mês de fevereiro. Observou-se uma periodicidade diurna, com um pico de produção de esporos entre as 06:00 e as 10:00 horas em todos os oito meses do ano em que ocorreu na costa, sem qualquer alteração no pico de libertação. Foram estudados os efeitos dos fatores ambientais na libertação de esporos e na periodicidade diurna. A libertação de esporos diminuiu com o aumento da duração da exposição das frondes ao ar, tendo-se obtido a quantidade máxima de esporos em condições submersas. A libertação de esporos também variou em diferentes salinidades, tendo-se observado o pico de libertação de esporos a uma salinidade de 35%. A quantidade de esporos libertados a diferentes intensidades de luz também variou, tendo-se observado a libertação máxima a intensidades de luz de 1000 Lux. A libertação máxima de esporos foi observada no ciclo 24L:0D e as experiências realizadas com luzes coloridas de diferentes comprimentos de onda mostram que a produção de esporos foi máxima sob luz branca. Parâmetros ambientais como dessecação, salinidade e comprimentos de onda não afetaram a periodicidade diurna, mas a libertação de esporos foi alterada pelas intensidades de luz e pelo fotoperÃodo.
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