Morphology and Anatomy of the Flowers of Trichilia catigua A. Juss., T. elegans A. Juss. and T. pallida Sw. (Meliaceae)

Abstract

Morphological and structural features of flowers of Trichilia catigua A. Juss., T. elegans A. Juss. and T. pallida Sw. (Meliaceae) are presented here with the purpose to stimulate future reproductive and preservation studies of these brazilian native species. Anthesis occurred from April to August in T. catigua, January to May in T. pallida and September to January in T. elegans. Sepals and petals presented a papillose and pilose epidermis and a parenchymatous mesophyll. Male flowers presented pistillodes with abortive ovules and a staminal tube with tetrasporangiate anthers. Anther wall had a papilose epidermis, a fibrous endothecium, two middle layers and a secretory tapetum. Female flowers presented antherodes and bi - or tricarpellate syncarpous pistils. Ovary had a simple structure with anatropous, bitegmic ovules. Style was hollow or solid and the stigma was constituted by uni - or bicelullar trichomes. Strictly dioecious specimens were not found in the study area.<br>As características morfológicas e anatômicas das flores de Trichilia catigua A. Juss., T. elegans A. Juss. e T. pallida Sw. (Meliaceae) são descritas no presente trabalho, visando subsidiar futuros estudos sobre reprodução e preservação destas espécies nativas. A antese ocorreu de abril a agosto em T. catigua, de janeiro a maio em T. pallida e setembro a janeiro em T. elegans. As sépalas e pétalas apresentavam epiderme papilosa e pilosa e mesofilo parenquimático. As flores masculinas possuiam pistilódio com óvulos abortivos e tubo estaminal com número variável de anteras tetrasporangiadas, cuja parede apresentava epiderme papilosa, endotécio, duas camadas médias e tapete secretor. As flores femininas apresentavam anteródios e pistilo bi ou tricarpelar, com ovário de estrutura simples, estilete oco ou sólido com tecido transmissor central e estigma com pêlos uni ou bicelulares. Os óvulos eram anátropos e bitegumentados. Não foram encontrados no ambiente de estudo exemplares das espécies estritamente dióicos, sendo todos em maior ou menor grau monóicos

Morphology and anatomy of the Cordia trichotoma (Vell.) Arrab. ex I. M. Johnst diaspore (Boraginaceae)

“…The abaxial face epidermis with thick-walled cells and the mesophyll schlerenchyma of the sepals had a protecting function and the mesophyll aerenchyma located under the epidermic adaxial face was auxiliary in the wind dispersion of the diaspore The petals with larger superficial area and aerenchymatous mesophyll acted only in the anemocoric dispersion of the diaspore. The C. trichotoma sepals seemed to differ in the general structure of the calyx presented by Esau (1959), Fahn (1990) and Souza et al (2001), although Mauseth (1988) suggested that the sepals were extremely flexible evolutionarily. The petals of this species seemed better adapted to the structural description of Esau (1959), Mauseth (1988), Fahn (1990) and Souza et al (2001Souza et al ( , 2004.…”

“…The C. trichotoma sepals seemed to differ in the general structure of the calyx presented by Esau (1959), Fahn (1990) and Souza et al (2001), although Mauseth (1988) suggested that the sepals were extremely flexible evolutionarily. The petals of this species seemed better adapted to the structural description of Esau (1959), Mauseth (1988), Fahn (1990) and Souza et al (2001Souza et al ( , 2004.…”

Phylogenetic analysis of endophytic bacterial isolates from leaves of the medicinal plant Trichilia elegans A. Juss. (Meliaceae)

“…(catiguá), T. elegans A. Juss. (pau-de-ervilha) and T. pallida Sw. (baga-de-morcego) (Souza et al, 2001).…”

Anatomy of the developing fruit of Metrodorea nigra A. St.-Hil. (Rutaceae)

“…Therefore, Davis (1966) introduced the term pseudocrassinucellate for the ovules, where no the parietal cells were formed, but the apical cells of the nucellar epidermis underwent the periclinal divisions giving rise to a nucellar cap. Thus, in agreement with Souza et al (2001), only an ontogenetic study of the nucellus of the species would be necessary to be able to affirm if the ovules were crassinucellate or pseudocrassinucellate. The ovules of M. nigra had long uni-or bicellular trichomes of the placental and funicular origin.…”