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Temporal morphological variation of natural and clonal testate amoeba (Arcella vulgaris and Arcella gibbosa) lineages

Grant number: 13/25729-3
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): March 01, 2014
Effective date (End): December 31, 2015
Field of knowledge:Biological Sciences - Zoology - Morphology of Recent Groups
Principal Investigator:Daniel José Galafasse Lahr
Grantee:Alfredo Leonardo Porfirio de Sousa
Host Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:13/04585-3 - Deciphering the major trends of molecular and morphological evolution in the Amoebozoa, AP.JP


The proposed project compares the morphometric variability of a microbial eukaryote in a natural environment and clonal cultures. We will examine 12 distinct lineages from a single morphospecies collected from a lake at Universidade de São Paulo, in two different moments of the year. The morphometric variability in microorganisms is used as a taxonomic character, however, there is reason to believe that the intra-clonal morphometric variation can be much greater than previously thought. Consequently, understanding the phenotypic plasticity among and between lineages will make enable improved taxonomic resolution and ecological interpretations. Additionally, the cultures will be maintained for at least one year, to verify if the variability range will modify by selection effects. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PORFIRIO-SOUSA, ALFREDO L.; RIBEIRO, GIULIA M.; LAHR, DANIEL J. G.. Morphometric and genetic analysis of Arcella intermedia and Arcella intermedia laevis (Amoebozoa, Arcellinida) illuminate phenotypic plasticity in microbial eukaryotes. EUROPEAN JOURNAL OF PROTISTOLOGY, v. 58, p. 187-194, . (13/25729-3)
LAHR, DANIEL J. G.; KOSAKYAN, ANUSH; LAR, ENRIQUE; MITCHELL, EDWARD A. D.; MORAIS, LUANA; PORFIRIO-SOUSA, ALFREDO L.; RIBEIRO, GIULIA M.; TICE, ALEXANDER K.; PANEK, TOMAS; KANG, SEUNGHO; et al. Phylogenomics and Morphological Reconstruction of Arcellinida Testate Amoebae Highlight Diversity of Microbial Eukaryotes in the Neoproterozoic. Current Biology, v. 29, n. 6, p. 991+, . (13/25729-3, 15/02689-1, 13/04585-3, 13/12852-1)

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