Monilinema gen. nov., a homocytous genus (Cyanobacteria, Leptolyngbyaceae) from saline-alkaline lakes of Pantanal wetlands, Brazil(1)

Author(s)

da Silva Malone, Camila Francieli ^[1] ; Genuario, Diego Bonaldo ^{[2, 3]} ; Marcal Vieira Vaz, Marcelo Gomes ^[4] ; Fiore, Marli Fatima ^[5] ; Sant'Anna, Celia Leite ^[1]

Affiliation

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

^[2] Embrapa Environm, Lab Environm Microbiol, BR-13820000 Jaguariuna, SP - Brazil

^[3] Biodiversita Microbial Technol, BR-13087010 Campinas, SP - Brazil

^[4] Univ Vicosa, Dept Plant Biol, Lab Phycol & Mol Biol, BR-36570900 Vicosa, MG - Brazil

^[5] Univ Sao Paulo, Ctr Nucl Energy Agr, Ave Centenario 303, BR-13400970 Piracicaba, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF PHYCOLOGY; v. 57, n. 2 DEC 2020.
• Web of Science Citations: 0

Abstract

Cyanobacteria morphotypes with simple morphology, mainly thin filamentous homocytous strains, comprise a taxonomically complex group and represent a challenge in systematic studies. However, the polyphasic approach applied nowadays to investigate the cyanobacterial diversity has emerged as a powerful tool to undercover cryptic taxa and to set up a more natural classification system. Yet, studies exploring the cultured diversity of cyanobacteria from extreme tropical environments have paved the way to the discovery of new cyanobacteria taxa, enabling the description of Pantanalinema, Alkalinema, and Cephalothrix as novel genera from saline-alkaline lakes in Pantanal wetlands (Brazil). The present study investigated a set of cyanobacterial strains resembling Leptolyngbya morphotypes by means of its morphology, 16S ribosomal RNA (16S rRNA) phylogeny, and ITS secondary structures. Based on the shape and structure of their trichomes, the low levels of 16S rRNA identity coupled with the distinct phylogenetic position with regard to well establish genera, and their divergent ecological feature, these strains must be accommodated into a novel genus, named as Monilinema gen. nov., described under the provisions of the International Code of Nomenclature for algae, fungi, and plants. Accordingly, based on the singularity of the D1-D1 ` and V3 helixes, these strains should be considered as a single species, Monilinema alkalinum. (AU)

• FAPESP's process: 10/18732-0 - Bioactive natural products from marine cyanobacteria
• Grantee: Marcelo Gomes Marçal Vieira Vaz
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/00321-3 - Diversity and functional activity of cyanobacteria isolated from South Shetlands Archipelago, Antarctic Continent
• Grantee: Diego Bonaldo Genuário
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/18528-9 - Phylogenetic studies of the Phormidium complex (Cyanobacteria) from the Atlantic Rainforest and the Pantanal, Brazil
• Grantee: Camila Francieli da Silva Malone
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 14/26131-7 - Microbiome of Amazon River and its tributaries: biogeography and contribution to N2 cycle
• Grantee: Diego Bonaldo Genuário
• Support Opportunities: Scholarships in Brazil - Post-Doctoral