INVESTIGADORES
SANCHEZ PUERTA Maria virginia
artículos
Título:
A hypothesis for plastid evolution in chromalveolates
Autor/es:
SÁNCHEZ PUERTA, M. V. & C.F. DELWICHE.
Revista:
JOURNAL OF PHYCOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2008 vol. 44 p. 1097 - 1107
ISSN:
0022-3646
Resumen:
Four eukaryotic lineages, namely haptophytes, alveolates, cryptophytes, and heterokonts, contain in most cases photosynthetic and nonphotosynthetic members; the photosynthetic ones with secondary plastids with chlorophyll c as the main photosynthetic pigment. These four photosynthetic lineages were grouped together on the basis of their pigmentation and called Chromalveolates, which is usually understood to imply loss of plastids in the nonphotosynthetic members. Despite the ecological and economic importance of this group of organisms, the phylogenetic relationships among these algae are partially understood and the so-called chromalveolate hypothesis is very controversial. This review evaluates the evidence for and against this grouping and summarizes the present understanding of chromalveolate evolution. We also describe a testable hypothesis that is intended to accommodate current knowledge based on plastid and nuclear genomic data, discuss the implications of this model and comment on areas that require further examination.
