04467nab a2200265 i 4500003000900000005001700009008004100026040001800067072000800085100003300093100003100126100003400157100002100191245012100212500009900333520340400432650002303836650002103859650001803880650002203898773017603920856007804096942000804174999001904182BR-BrBNA20260202101111.0260202b2024    bl.ar|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aF50  aGevú, Kathlyn Vasconcelos   aLima, Helena Regina Pinto   aAlexandrino, Camilla Ribeiro   aCunha, Maura da   aAnatomical and histochemical characterization of vegetative organs of Brazilian species of Renealmia (Zingiberaceae)  aPublicação on-line; Bibliography p. 14-16 (50 ref.); 1 table; 8 illus.; Summaries (En, Pt)  a

Abstract

Renealmia comprises approximately 85 herbaceous and rhizomatous plants in Africa and America known
for their metabolite diversity. This study characterized the anatomy and histochemistry of the vegetative
organs of three native Brazilian Renealmia species, R. breviscapa and R. nicolaioides, collected from the
Amazon Forest in Acre and R. chrysotricha from the Atlantic Forest in Rio de Janeiro. Samples were fixed
and processed using conventional plant anatomy and micromorphology techniques, including histochemical
tests to identify classes of compounds in vegetative organs. Characteristics including oil idioblasts, dorsiventral
leaf structure, tetracytic stomata, unicellular trichomes, and prismatic crystals were common among the
studied species of Renealmia, and thus significant for the family. Distinctive characteristics were identified
in the vegetative organs of the three species, including the cellular distribution of root phloem, covering of
rhizome tissue, different types and distributions of idioblasts and phenolic trichomes in rhizomes and leaves,
presence or absence of petiole, and subepidermal layer in the intercostal region of leaves. Mineral content
importance as a diagnostic characteristic of the genus is also emphasized. The results of this study advance
the understanding of the distinctive anatomical characteristics of the three species of Renealmia in different
environments, two in the Atlantic Forest and one in the Amazon Forest.

Key words: micromorphology, special metabolites, tribe Alpinieae, ultrastructure, Zingiberaceae.


Resumo

Renealmia abrange aproximadamente 75 espécies de plantas herbáceas e rizomatosas, oriundas de regiões
africanas e neotropicais, conhecidas por sua diversidade de metabólitos. Este estudo visou caracterizar a
anatomia e histoquímica dos órgãos vegetativos de três espécies nativas do Brasil: Renealmia breviscapa e 
Renealmia nicolaioides, coletadas na Floresta Amazônica, no Acre, e Renealmia chrysotricha, encontrada em
uma floresta Atlântica, no Rio de Janeiro. Amostras foram fixadas e processadas por técnicas convencionais
de anatomia vegetal, incluindo testes histoquímicos para identificação das classes de substâncias presentes
nos órgãos vegetativos. Características como idioblastos oleíferos, estrutura foliar dorsiventral, estômatos
tetracíticos, tricomas unicelulares e presença de cristais prismáticos foram comuns entre as espécies de
Renealmia estudadas, revelando-se significativas para a família. Foram identificados caracteres distintivos
nos órgãos vegetativos das três espécies, como distribuição celular do floema radicular, cobertura do tecido
dos rizomas, diferentes tipos e distribuição de idioblastos e tricomas fenólicos tanto nos rizomas quanto nas
folhas, presença ou ausência de pecíolo, além da camada subepidérmica na região intercostal das folhas.
Destaca-se também a importância do conteúdo mineral como característica diagnóstica do gênero Renealmia.
Este estudo proporciona um avanço no conhecimento das características anatômicas distintivas das três
espécies de Renealmia em diferentes ambientes, tanto na Floresta Atlântica quanto na Floresta Amazônica.

Palavras-chave: micromorfologia, metabolitos especiais, tribo Alpinieae, ultraestrutura, Zingiberaceae.  aMORFOLOGIA VEGETAL  aANATOMIA VEGETAL  aZINGIBERACEAE  aESTRUTURA VEGETAL0 07099359346dRio de Janeiro-RJ Jardim Botanico do Rio de Janeiro 1935o2025-7320tRodriguésia (Brazil)x0370-6583; 2175-7860 on-linegv. 75 p. 1-16; (2024)wBR2025007468  uhttps://www.scielo.br/j/rod/a/SzrBMv3qf7zwVTdqxnMnXGb/?format=pdf&lang=en  cANA  c339981d339981