Phylogenetic connection among close genera of Aphanizomenonaceae (Cyanobacteria): Amphiheterocytum gen. nov., Cylindrospermopsis and Sphaerospermopsis

Autor(es)

Sant'Anna, Celia L. ^[1] ; Gama, Watson A. ^[1] ; Rigonato, Janaina ^[2] ; Correa, Gilsineia ^[3] ; Mesquita, Marcella C. B. ^[3] ; Marinho, Marcelo Manzi ^[3]

Afiliação do(s) autor(es)

^[1] Inst Bot, Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Ctr Nucl Energy Agr, Piracicaba, SP - Brazil

^[3] Univ Estado Rio De Janeiro, Lab Ecol & Physiol Phytoplankton, Rio De Janeiro - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS; v. 37, p. 205-214, JAN 2019.
• Citações Web of Science: 1

Resumo

Aphanizomenonaceae is a recently proposed family of Cyanobacteria encompassing 12 planktic genera. The formation and distribution of heterocytes and akinetes along the trichome are the main morphological characteristics of this family. In this context, Sphaerospermopsis and Cylindrospermopsis are close related genera both molecularly and morphologically differing by 1) rounded akinetes adjacent to the heterocytes disposed along the trichome in Sphaerospermopsis; 2) apical heterocytes and akinetes separated by a few cells (2-3) in Cylindrospermopsis. Recently, during a survey on cyanobacteria from tropical Brazilian eutrophic lakes, strains with similarities to Sphaerospermopsis and Cylindrospermopsis were isolated. Aiming to elucidate the phylogenetic placement of these strains, we performed morphological, physiological and molecular studies. The Brazilian strains were confirmed to be closely related to Sphaerospermopsis and Cylindrospermopsis, but the phylogeny, based on 16S rRNA gene and 16S-23S rRNA intergenic region, clustered them in a well-defined clade separate from these genera. According to these results, we detailed the morphology, physiology, and phylogeny of the proposed new genus Amphiheterocytum, which showed potential to create blooms in tropical shallow lakes. (AU)

• Processo FAPESP: 12/16430-1 - Caracterização molecular e fenotípica de gêneros das famílias Synechococcaceae e Chroococcaceae (Cyanobacteria) de ambientes terrestres da Mata Atlântica, SP, Brasil
• Beneficiário: Watson Arantes Gama Júnior
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/06850-3 - Análise metagenômica e polifásica da comunidade cianobacteriana do litoral paulista
• Beneficiário: Janaina Rigonato
• Linha de fomento: Auxílio à Pesquisa - Regular