| Popis: |
This paper is a contribution to the morphological and molecular characterization of the cyanobacterium Brasilonema roberti-lamii from populations found in Central Mexico. The general growth form and the morphological, morphometric and ecological characteristics of the populations studied clearly correspond to those described for Brasilonema roberti-lamii (basionym: Tolypothrix roberti-lamii ) from the French Antilles. Based on molecular data from DNA sequencing of the16S rRNA gene and the IGS of the cpc B- cpc A phycocyanin operon ( cpc BA-IGS), we propose that the populations that we studied are closely related to those of other Brasilonema species, including B. octagenarum UFV-OR1, UFV-E1 and HA4187-MV1-p1F, Brasilonema sennae CENA 114, B . tolantongensis , B . terrestre CENA 116, B . angustatum HA4187-MV1-B2+p1F and HA4187-MV1-B2+p1H and B . bromeliae SPC951. Our findings support the transference of Tolypothrix roberti-lamii , which was made based exclusively on morphological criteria, to Brasilonema . The use of molecular analyses in addition to traditional morphological and ecological criteria, known as polyphasic approach, is a good alternative to describe taxa of cyanobacteria, mainly at the genus and species levels. |
