Journal Title
Title of Journal: Trees
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Publisher
Springer-Verlag
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Authors: Camila Devicaro de Souza Cristina Ribeiro Marinho Simone Pádua Teixeira
Publish Date: 2013/01/03
Volume: 27, Issue: 3, Pages: 801-813
Abstract
Robust glandular appendages are reported in legumes of the Caesalpinieae tribe Most studies only attempt to describe the external morphology of these structures without providing a distinction between glandular trichomes and emergences This study employed ontogeny to resolve the terminology of these structures present in flowers of two tropical woody legumes of Caesalpinieae Erythrostemon gilliesii and Poincianella pluviosa through surface anatomical and ultrastructural analyses Flowers of both species exhibit branched and nonbranched glandular trichomes since these structures originate from a single protodermal cell Nonbranched glandular trichomes occur on the inflorescence axis pedicel sepals and ovary in P pluviosa they also occur in the unguicle of wings and standard filaments anthers and style This type of trichome shows a nonsecretory multiseriate stalk and a secretory multicellular head Branched glandular trichomes with similar morphology but exhibiting nonsecretory branches occur in the inflorescence axis pedicel and sepals in P pluviosa they also occur in the unguicle of wings During the secretory phase the trichome head cells have large nuclei cytoplasm rich in vacuoles oleoplasts mitochondria rough endoplasmic reticulum and free ribosomes The content is released in the intercellular spaces of the head in a merocrinous mechanism and reaches the surface through cuticle rupture We emphasized the importance of ontogenetic studies to clarify the terminology of secretory structures This type of study should be performed in other caesalpinoids so that such robust glandular appendages can be correctly interpreted and used with phylogenetic value in the groupWe thank to Edmárcio S Campos FCFRP/USP Maria Dolores S Ferreira José Augusto Maulin FMRP/USP and Rodrigo F Silva FFCLRP/USP for technical assistance and Dewey Litwiller University of Saskatchewan Saskatoon Saskatchewan Canada for English review This study was funded by Fundação de Amparo à Pesquisa do Estado de São Paulo process numbers 2008/554347 2009/010570 2009/176420 and Conselho Nacional de Desenvolvimento Científico e Tecnológico process number 301960/20097
Keywords:
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- Reference genes selection for quantitative gene expression studies in Pinus massoniana L.
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