Karyotypes and microfluorometric studies in Porphyra columbina Montagne (Bangiales, Rhodophyta), with reference to morphology and sexuality
Ten morphotypes attributed to different species of Porphyra have been found in the central coast from Chile. In this paper we report the chromosome number and microfluorometric studies in P. columbina from Montemar, Chile (32°57'S - 71°33'W). Reproductive gametophytes from two morphotypes...
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| Autores principales: | , , |
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| Lenguaje: | English |
| Publicado: |
Universidad de Valparaíso. Facultad de Ciencias del Mar
2008
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| Materias: | |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572008000100003 |
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| Sumario: | Ten morphotypes attributed to different species of Porphyra have been found in the central coast from Chile. In this paper we report the chromosome number and microfluorometric studies in P. columbina from Montemar, Chile (32°57'S - 71°33'W). Reproductive gametophytes from two morphotypes were separated by morphology, sexuality and characteristic pattern distribution of reproductive cells: P. columbina (monoecious interspersed male and female patches distribution) and P. columbina f. 1 (dioecious and monoecious sectorised male and female patches distribution). The results of P. columbina (n=20 gametophytes) showed a basic haploid chromosome number of n=3, except one frond with 2 and 3 chromosomes in their cells. The results of P. columbina f.1 (n= 26 gametophytes) showed a haploid chromosome number of n=4, but the haploid condition was found inconsistently in some fronds, having a chromosome range from 3 to 5. Mean of nuclear DNA fluorescence of spermatangia and zygotosporangia of both morphotypes had coherent haploid and diploid values. Inter morphotypes comparison of nuclear DNA fluorescence values in spermatangia had significant differences (P<0.05) |
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