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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Structure and evolution of polysporangiate anthers in Melastomataceae

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Author(s):
Caetano, Ana Paula Souza [1] ; Reginato, Marcelo [2] ; Goldenberg, Renato [3] ; Cortez, Priscila Andressa [4] ; Basso-Alves, Joao Paulo [5] ; Michelangeli, Fabian A. [6] ; Carmello-Guerreiro, Sandra Maria [7] ; Teixeira, Simone Padua [8]
Total Authors: 8
Affiliation:
[1] Univ Fed Mato Grosso, Inst Biociencias, Dept Bot & Ecol, Lab Estudos Integrados Plantas, Cuiaba - Brazil
[2] Univ Fed Rio Grande do Sul, Inst Biociencias, Dept Bot, Porto Alegre, RS - Brazil
[3] Univ Fed Parana, Dept Bot, Ctr Politecn, Setor Ciencias Biol, Curitiba, Parana - Brazil
[4] Univ Sao Paulo, Inst Biociencias, Dept Bot, Sao Paulo - Brazil
[5] Inst Pesquisas Jardim Bot Rio de Janeiro DiPeq JB, Rio De Janeiro, RJ - Brazil
[6] New York Bot Garden, Inst Systemat Bot, Bronx, NY 10458 - USA
[7] Univ Estadual Campinas, Inst Biol, Dept Biol Vegetal, Campinas - Brazil
[8] Univ Sao Paulo, Dept Ciencias Farmaceut, Fac Ciencias Farmaceut Ribeirao Preto, Sao Paulo - Brazil
Total Affiliations: 8
Document type: Journal article
Source: PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS; v. 46, OCT 2020.
Web of Science Citations: 0
Abstract

Polysporangiate anthers, i.e., anthers bearing more than four sporangia, are an unusual condition that has been reported in several angiosperm families, including Melastomataceae. The structure of anthers in Melastomataceae and taxa from its sister lineage was investigated in 302 species, which were categorized as polysporangiate or non-polysporangiate based on original and literature data. Additionally, the evolutionary history of the anther type in the family was assessed by stochastic character mapping. The polysporangiate anthers of Melastomataceae exhibit two corrugated thecae with transverse septa of parenchymatous tissue partitioning the four pollen sacs into several small locules, this being the most common type of sporangia multiplication among angiosperms. Despite the fact that non-polysporangiate anthers are the most common character-state observed and have been reconstructed in most ancestral nodes of the phylogeny, a relatively large number of transitions to polysporangiate anthers were estimated in our analyses. One event was detected in Meriania, four events were detected in Miconia, and two (with a reversal) or three independent transitions in Microlicia. Most species with polysporangiate anthers occur in Microlicia, representing about 41 % of the species in the genus. Even though tetrasporangiate anthers are the most common condition among angiosperms, dithecal polysporangiate anthers occur in at least 74 taxa of Melastomataceae, in a unique association with poricidal dehiscence. (AU)

FAPESP's process: 11/02701-0 - Floral development in Melastomataceae Juss. species
Grantee:João Paulo Basso Alves
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 10/15077-0 - Apomixis, sexuality, polyploidy and pollen viability in the Neotropical tribe Miconieae (Melastomataceae)
Grantee:Ana Paula de Souza Caetano
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 13/08945-4 - Calcium oxalate crystals in endothecium layer of Melastomataceae - a morphological marker with systematic implications in family
Grantee:Ana Paula de Souza Caetano
Support Opportunities: Scholarships abroad - Research Internship - Doctorate