Morphological and molecular studies on the Brazilian native red seaweed Laurencia oliveirana (Rhodomelaceae, Ceramiales)

Author(s)

Cassano, Valeria ^[1] ; Oliveira, Mariana C. ; Candelaria Gil-Rodriguez, Ma ^[2] ; Senties, Abel ^[3] ; Diaz-Larrea, Jhoana ^[3] ; Fujii, Mutue T. ^[4]

Affiliation

^[1] Univ Sao Paulo, Inst Biociencias, Dept Bot, BR-05508900 Sao Paulo - Brazil

^[2] Univ La Laguna, Dept Biol Vegetal Bot, E-38207 San Cristobal la Laguna - Spain

^[3] Univ Autonoma Metropolitana Iztapalapa, Dept Hidrobiol, Iztapalapa - Mexico

^[4] Inst Bot, Nucleo Pesquisa Ficol, Sao Paulo - Brazil

• Document type: Journal article
• Source: REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY; v. 22, n. 4, p. 838-849, JUL-AUG 2012.
• Web of Science Citations: 2

Abstract

Morphological and molecular studies were carried out on Laurencia oliveirana from the type locality (Arraial do Cabo, Rio de Janeiro, Brazil). This species is easily recognized by its small size, sub-erect habit forming intricate cushion-like tufts and unilateral pectinate branching. The species displays all the typical characters of the genus Laurencia, such as the production of the first pericentral cell underneath the basal cell of the trichoblast, tetrasporangia produced from particular pericentral cells, with the third and fourth pericentral cells becoming fertile, without production of additional pericentral cells, spermatangial branches produced from one of two laterals on the suprabasal cell of trichoblasts, and procarp-bearing segment with five pericentral cells. Details of tetrasporangial plants and development of procarp and male plants are described for the first time for the species. The phylogenetic position of L. oliveirana was inferred by analysis of the chloroplast-encoded rbcL gene sequences from 57 taxa. In all phylogenetic analyses, L. oliveirana grouped with L. caraibica, L. caduciramulosa, L. venusta and L. natalensis, forming a monophyletic clade within the Laurencia sensu stricto. The genetic divergence between L. oliveirana and the molecularly closest species, L. caraiba collected in Brazil, was 2.3%. (AU)

• FAPESP's process: 10/52244-2 - Diversity and phylogenetic relationships of marine benthic algae: the Laurencia complex (Rhodophyta) in the Atlantic coasts of tropical and subtropical regions
• Grantee: Valéria Cassano
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/50193-1 - Marine algae as source of metabolites of economical impact
• Grantee: Pio Colepicolo Neto
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants