Development of conceptacles in Amphiroa (Corallinales, Rhodophyta)

Here, we describe the development of sporangial and gametangial conceptacles for Amphiroa beauvoisii and A. vanbosseae; sporangial conceptacles only for A. misakiensis; and gametangial conceptacles only for A. cryptarthrodia and A. rigida. The descriptions are based on the observation of histologica...

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Bibliographic Details
Published in:Acta Botânica Brasílica 2013-12, Vol.27 (4), p.698-708
Main Authors: Rosas-Alquicira, Edgar Francisco, Riosmena-Rodríguez, Rafael, Hernández-Carmona, Gustavo, Neto, Ana Isabel
Format: Article
Language:English
Subjects:
carposporangial filament origin
senescence
sporangial pore canal anatomy
sporangium location
taxonomy
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Summary:Here, we describe the development of sporangial and gametangial conceptacles for Amphiroa beauvoisii and A. vanbosseae; sporangial conceptacles only for A. misakiensis; and gametangial conceptacles only for A. cryptarthrodia and A. rigida. The descriptions are based on the observation of histological preparations obtained from 112 specimens collected from the Gulf of California, in Mexico, and the Azores archipelago of Portugal. Information on the development of the sporangial conceptacle pore and conceptacle senescence is here described and illustrated for the first time. Four development patterns were observed: two for sporangial conceptacles; one for spermatangial conceptacles; and one for carposporangial conceptacles. The phases of development of the sporangial conceptacle were found to be useful in delimiting species within the genus. Based on the sporangium location on the cavity floor and the pore canal anatomy, the species A. beauvoisii, A. misakiensis and A. vanbosseae can be distinguished from each other.
ISSN:0102-3306
1677-941X
0102-3306
DOI:10.1590/S0102-33062013000400008