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| Rabelo,Guilherme Rodrigues; Marques,Jonas de Brito Campolina; Zottich,Umberto; Dias,Germana Bueno; Miguel,Emílio Castro; Gomes,Valdirene Moreira; Da Cunha,Maura. |
| Pachystroma longifolium is an evergreen species of Euphorbiaceae that occurs in tabuleiro forest, a type of lowland Atlantic Forest. The site chosen for this study was a fragment of tabuleiro forest that has a history of being selectively logged for timber. P. longifolium is very successful at colonizing disturbed areas in this forest fragment in comparison with preserved fragments. In the present work, which was based on using different microscopy (electron and light microscopy, X-ray analysis) and biochemistry techniques, we describe the leaf and latex traits of P. longifolium and their role as defense mechanisms against desiccation and herbivory. Our results suggest the richness of P. longifolium populations, in the disturbed forest area studied, is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatomical strategies; Crystals; Cuticles; Laticifers; Leaf anatomy. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000100018 |
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| Moraes,Tarsila Maria da Silva; Rabelo,Guilherme Rodrigues; Alexandrino,Camilla Ribeiro; Silva Neto,Sebastião José da; Da Cunha,Maura. |
| The genus Psychotria comprises approximately 2,000 species that are mostly shrubs distributed in forests of the tropics and subtropics. Within the Rubiaceae, Psychotria is well known for its species that produce bioactive alkaloids and for its taxonomic complexity. The anatomical and micromorphological characters of the leaves of P. hoffmannseggiana, P. carthagenensis, P. deflexa, P. glaziovii, P. leiocarpa, P. racemosa, and P. vellosiana were investigated and described to understand the interspecific variation of these species, which will contribute to the systematics of the genus. Principal component analysis (PCA) and unweighted pair group method analysis (UPGMA) indicated four groups based on the presence or absence of some of the characters studied.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaf anatomy; Cluster analysis; Principal component analysis; Systematic anatomy; Domatia; Leaf surface morphology. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000100021 |
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| Moraes,Tarsila Maria da Silva; Barros,Claudia Franca; Neto,Sebastião José da Silva; Gomes,Valdirene Moreira; Da Cunha,Maura. |
| Simira is a predominantly woody Neotropical genus comprising 41 taxa, 16 of which occur in Brazil and eight of them in the southeastern region of Brazil. Leaf blades of Simira eliezeriana Peixoto, S. glaziovii (K. Schum.) Steyerm., S. grazielae Peixoto, S. pikia (K. Schum.) Steyerm., S. rubra (Mart.) Steyerm., S. sampaioana (Standl.) Steyerm.were collected in the southeastern region of Brazil and fixed according to usual methods for light and electron microscopy. The leaf blades show typical characteristics of the Rubiaceae family as dorsiventral mesophyll and paracytic stomata. The presence of two bundle sheaths that extend to the upper epidermal layer, prismatic crystal and crystal-sand, alkaloids in the mesophyll and the organization micromorphological... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaf anatomy; Structure; Morph-anatomy. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452009000300004 |
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