Adaptações anatômicas em folhas de marmeleiro e velame da caatinga brasileira

Barros, Ileane Oliveira; Soares, Arlete A.

doi:10.1590/s1806-66902013000100024

Cited by 30 publications

(19 citation statements)

References 19 publications

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“…Unicellular and multicellular tector trichomes located in the apical stipule and in the midrib and secondary veins in leaves of plants of the three studied sites indicate a strategy of hydric economy. Lipids present in the walls of the basal cells of the trichomes contribute to reduce the apoplastic loss of water (Barros & Soares, 2013). This way, the strategic location of trichomes in P. viridis could contribute to prevent water loss by cells of the vascular bundle and prevent desiccation of apical stipule and, consequently, protect the apical gem from dehydration, mechanical shock, and attack of predators and pathogens.…”

Section: Discussionmentioning

confidence: 99%

Influence of environment on the leaf morpho-anatomy and histochemical of the ayahuasca leaf: Populations cultivated in extra-Amazonian regions

Miranda¹,

Souza²,

Milan³

et al. 2020

Acta Sci. Biol. Sci.

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Psychotria viridis Ruiz & Pav. (Rubiaceae) occurs naturally throughout the Amazon and it is traditionally used by indigenous communities, being incorporated into religious use in urban contexts over the last few decades. It is known and cultivated in many regions of South America for possessing valuable bioactive alkaloids. In this paper, we described P. viridis leaf morphology, anatomy and histochemistry from three populations cultivated in the southeastern Brazil, in order to identify possible adaptations to local environment and management. All plants presented terminal stipules and basic morpho-anatomical patterns of leaves, consistent with most species of the genus, as heterogeneous dorsiventral mesophyll, uniseriate epidermis, presents large cells with prominent vacuoles and druses. Unicellular non-glandular trichomes and multicellular starry trichomes were present in the primary and secondary veins. Amphi-hypostomatic leaf pattern, not yet described for the species, was common in all studied plants. Variation in the presence of domatia in the same population indicates that this structure cannot be used for taxonomic determination of P. viridis, as already described for other species of the genus. Presence of secretory ducts and reduction in stomata density and leaf area represent the main morpho-anatomic adaptations of plants from drier and warmer climates. Histochemical tests were positive for alkaloids, polysaccharides, proteins and phenolic compounds, being negative for starch only in plants subjected to water stress. We concluded that the morpho-anatomical and histochemical alterations found in the plants of this study resulted from seasonal water deficit adaptations and to maintain or attract mutualistic organisms.

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Section: Discussionmentioning

confidence: 99%

Influence of environment on the leaf morpho-anatomy and histochemical of the ayahuasca leaf: Populations cultivated in extra-Amazonian regions

Miranda¹,

Souza²,

Milan³

et al. 2020

Acta Sci. Biol. Sci.

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“…This suggests that these species have the ability to colonize empty spaces or tolerate more restrictive habitats regarding temporal water availability. C. blanchetianus is considered a colonizing species of early successional stages that can tolerate high light incidence (Klich 2000;Queiroz et al 2006; Barros and Soares 2013). Despite the slow growth rate of C. leptophloeos, which is most commonly found in areas in later successional stages (Queiroz et al 2006), its wood is less dense and accumulates large quantities of water in its tissues (Lima et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Influence of leaf morphometric variations on the growth of seedlings and juveniles of woody species in a semiarid environment

et al. 2017

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Variations in leaf morphometry and in diameter and height growth of plants may occur due to changes in light and temperature conditions of the forest in order to compensate the stress in the habitat. In this study, we examine the relationship of seedling and juvenile size and leaf area of woody species in forests of different ages ([55 and 19 years) in northeastern Brazil. A total of 600 individuals of four species, seedlings and juveniles that survived a rainy season were evaluated. Seedlings and juveniles of Croton blanchetianus Baill, Poincianella pyramidalis (Tul.) L. P. Queiroz, Myracrodruon urundeuva Allemão and Commiphora leptophloeos (Mart.) J.B. Gillett were measured for height and stem diameter in the beginning of the rainy season of 2014. One leaf of each individual was collected in the beginning of the rainy season. Leaves were photographed, and leaf area was measured. Differences in height, diameter and leaf area between forests and the existence of a relationship of diameter and height to leaf area were examined. Leaf area and seedling and juvenile size of C. blanchetianus and C. leptophloeos decreased as succession progressed. However, this was not observed for seedlings of P. pyramidalis and juveniles of M. urundeuva. Leaf area explained 7-26% of the variation in size of individuals in the young forest and 11-39% of the variation in size of individuals in the mature forest. Despite variations in leaf area, significant changes in growth rate were not found with the increase in forest age for most ontogenetic stages and species.

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“…Este tipo de estelo também foi relatado para algumas espécies de bromélias, como Dyckia brevifolia Baker (LOBO, 2007) e B. antiacantha (DETTKE & MILANEZE-GUTIERRE, 2008). A medula é constituída pelo parênquima fundamental e por todo o caule há presença de idioblastos entre as células parenquimáticas, contendo cristais do tipo ráfides (Figura 3B e 3C), desempenhando importante função ecológica como defesa contra herbivoria (PRYCHID & RUDALL, 1999), além de neutralizarem o excesso de cálcio, transportado pelo fluxo hídrico (BARROS & SOARES, 2007).…”

Section: Resultsunclassified

ANATOMIA DOS ÓRGÃOS VEGETATIVOS DE Cryptanthus beuckeri E. MORREN (BROMELIACEAE)

Ribeiro¹,

Aoyama²

2015

Enciclopédia Biosfera

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RESUMO Cryptanthus beuckeri E. Morren (Bromeliaceae) é endêmica do Brasil, possui distribuição restrita ao Espírito Santo e a Bahia, sendo incluída na lista de espécies ameaçadas de extinção do Espírito Santo como vulnerável. Além disso, há poucos estudos anatômicos com este gênero e essa escassez enfatiza a importância de mais estudos, contribuindo para o conhecimento do gênero que possui uma complexidade taxonômica. Desse modo, o presente trabalho teve por objetivo descrever a anatomia dos órgãos vegetativos de C. beuckeri. As amostras foram coletadas em São Mateus, Norte do Espírito Santo-Brasil e foram analisadas de acordo com técnica usuais de anatomia vegetal. A raiz apresenta distribuição dos tecidos comum na família e ausência de velame. O caule estruturalmente não se difere das monocotiledôneas e possivelmente armazena amido. A folha apresenta em ambas as faces escamas sem diferenciação entre as células do disco central e da ala, corpúsculos silicosos na epiderme, estômatos tetracíticos no nível inferior das células epidérmicas, mesofilo dorsiventral, cristais ráfides e aerênquima no pecíolo e na bainha. Os resultados obtidos mostram caracteres comuns para a família, além de subsidiar conhecimento para a taxonomia do gênero e para futuros trabalhos. PALAVRAS-CHAVE: Bromelioideae, caule, descrição anatômica, folha, raiz. ANATOMY OF VEGETATIVE ORGANS OF Cryptanthus beuckeri E. MORREN (BROMELIACEAE) ABSTRATC Cryptanthus beuckeri E. Morren (Bromeliaceae) is endemic from Brazil and it has restricted distribution, the Espírito Santo and Bahia, and included in the endangered species list of Espírito Santo as vulnerable. In addition, there are few anatomical researches about this genus and this lack of information emphasizes the importance for more research in order to contribute to the knowledge of this genus, which has a taxonomic complexity. Therefore, this study aimed to describe the anatomy of the vegetative organs of C. beuckeri. The samples were collected in São Mateus, Northern of Espírito Santo-Brazil and they were analysed according to usual techniques of plant anatomy. The root presents distribution of common fabrics in the

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Adaptações anatômicas em folhas de marmeleiro e velame da caatinga brasileira

Cited by 30 publications

References 19 publications

Influence of environment on the leaf morpho-anatomy and histochemical of the ayahuasca leaf: Populations cultivated in extra-Amazonian regions

Influence of environment on the leaf morpho-anatomy and histochemical of the ayahuasca leaf: Populations cultivated in extra-Amazonian regions

Influence of leaf morphometric variations on the growth of seedlings and juveniles of woody species in a semiarid environment

ANATOMIA DOS ÓRGÃOS VEGETATIVOS DE Cryptanthus beuckeri E. MORREN (BROMELIACEAE)

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