Publicação: Phylogeny and morphology of the freshwater red alga Nemalionopsis shawii (Rhodophyta, Thoreales) from Nepal
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Wiley-Blackwell
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
Phylogenetic relationships and morphological characters are presented for a population of Nemalionopsis shawii Skuja collected from Nepal. Molecular data (sequences of rbcL and cox1) were generated and morphological characters were described in detail. The rbcL sequence analyses showed that specimens from Nepal are most similar to N.shawii from Indonesia and Japan and that these entities form a clade with high support (>95% bootstrap and 0.95 posterior probability). The cox1 barcode sequence, however, only had 90.9-91.9% identity with specimens of N.shawii from Hawaii. The rbcL sequence of the specimen from Nepal was positioned in a clade having sequence identity of 99.3-99.7% with three samples: N.shawii from Indonesia and two from Japan identified as N.tortuosa. The comparison of morphological characters of Nemalionopsis from Nepal allowed unequivocal identification with N.shawii. Identifications from previous studies using molecular data were mistaken since most reports of N.shawii are actually of N.tortuosa or vice-versa. This confusion of names presumably occurred because most specimens previously sequenced were from culture collections or from Chantransia' stages. Small tufts of Chantransia' stage were observed growing epiphytically on gametophytes and on the basal system. Carpogonia and spermatangia were fully described in specimens from Nepal. Monosporangia were not observed, whereas carposporangia were unequivocally described for the first time in the genus. An unusual flat strap-like basal system was observed, interpreted as an additional mode of maintenance in nature under unfavorable environmental conditions.
Descrição
Palavras-chave
Chantransia' stage, basal system, carposporangia, cox1, molecular phylogeny, rbcL, sexual reproduction
Idioma
Inglês
Como citar
Phycological Research. Hoboken: Wiley-blackwell, v. 64, n. 1, p. 11-18, 2016.
