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Data/hora: 17/06/2024 06:43:29

Chromosome numbers and the systematics of tribe Vochysieae (Vochysiaceae)
Provedor de dados: 39
Autores: Yamagishi-Costa,Júlia; Barbosa,Andréa Rodrigues; Shimizu,Gustavo Hiroaki; Yamamoto,Kikyo; Forni-Martins,Eliana Regina.
ABSTRACT With five neotropical genera and ca. 220 species, Vochysieae is the largest tribe of Vochysiaceae, comprising more than 90 % of its species. Preliminary phylogenetic analyses with matK sequence data indicated that Vochysieae may be paraphyletic, separated into the clades QRC (Qualea, Ruizterania and Callisthene) and VS (Vochysia, Salvertia). Whether the genera and the infrageneric taxa are artificial is still controversial. In this study, we analyzed the distribution of chromosome numbers in mitotic or meiotic cells among 20 species belonging to the genera Callisthene, Qualea, Salvertia, and Vochysia, that are native and common in Central and Southeast Brazilian forests or savannas. Species of Callisthene and Qualea possessed 2n = 22, while...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Callisthene; Cytotaxonomy; Myrtales; Neotropics; Qualea; Salvertia; Vochysia; Vochysiaceae.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200314

Appendicular origin and structure of the spur of Vochysiaceae flowers
Provedor de dados: 39
Autores: Carmo-Oliveira,Renata; Oliveira,Paulo E.; Morretes,Berta Lange de.
ABSTRACT Floral nectaries are linked with animal pollinators and floral specialization, characterizing some plant groups, such as the mostly Neotropical Vochysiaceae. The phylogeny of these plants has been revised based on molecular data, but their conspicuous spurs were mostly neglected. The appendicular or receptacular origin of these spurs has been discussed but without ontogenetic or anatomical study, and the association between spur structure and pollination systems was never assessed. We studied the spurs of species of four genera of Cerrado Vochysiaceae (tribe Vochysieae), documenting their vascularization and comparing their structure to previously described pollination systems. The spur structure was roughly similar among species, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Callisthene; Nectar; Nectarostomata; Plant anatomy; Qualea; Salvertia; Vochysia.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300433

Stigmatic surface in the Vochysiaceae: reproductive and taxonomic implications
Provedor de dados: 39
Autores: Carmo-Oliveira,Renata; Morretes,Berta Lange de.
The Vochysiaceae are Neotropical trees and shrubs, common in the savanna areas in Central Brazil (Cerrados). The family has been traditionally divided into two tribes: Erismeae, with three genera, and Vochysieae, with five genera. We investigated the stigmatic surface of six Vochysiaceae species, belonging to four genera of Vochysieae: Vochysia, Salvertia, Callisthene and Qualea. Flowers and buds at different developmental stages were collected. Morphological features were observed on fresh material and stigmatic receptivity was inferred based on esterasic activity. Pistils were fixed and embedded in paraplast and sectioned on a rotary microtome; the sections were stained before histological analysis. Stigmas of open flowers were also observed by scanning...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Callisthene; Qualea; Salvertia; Stigma receptivity; Vochysia.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000300018