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| Costa,Fernanda Flores; Lima,Helena Regina Pinto; Cunha,Maura Da; Santos,Inês da Silva. |
| The Monimiaceae is represented in the Neotropical region by six genera. Macropeplus Perkins is a Brazilian genus comprising four species restricted to high-montane Atlantic Forest areas, which have not been properly examined from the anatomical point of view. This study characterizes the anatomical structure and histochemical aspects of the leaves of Macropeplus dentatus and M. ligustrinus, and adds to our taxonomic knowledge ofthe genus. The individuals studied were collected in the Serra dos Órgãos National Park and in the Caraça Natural Park in southeastern Brazil. Among the characteristics common to the two species, hypostomatic leaves, dorsiventral structure, paracytic stomata, a subepidermal layer, collateral vascular system in the form of an arc in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Rain Forest; Histochemistry; Leaf anatomy; Macropeplus; Monimiaceae. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000300027 |
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| Miguel,Emilio de Castro; Pireda,Saulo; Barros,Claudia Franca; Zottich,Umberto; Gomes,Valdirene Moreira; Miguens,Flavio Costa; Cunha,Maura Da. |
| ABSTRACT Secretory structures are formed by many types of plants and are present on numerous different organs. Among the many types of known secretory structures, colleters are predominant on plants of the Rubiaceae. One remarkable characteristic of secretory tissues is the export of exudates; however, the precise mechanism involved in this process is still unclear. To better understand the mechanisms of exudate externalization it is necessary to understand the ultrastructure and dynamics of the outer cell wall of the secretory structures during the secretory process, and so we investigated these aspects of the colleters of Bathysa nicholsonii. The outer cell wall (OCW) exhibits multiple layers: a basal polysaccharide rich layer; a cuticular membrane,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colleters; Outer cell wall; Rubiaceae; Secretion accumulation site; Secretion mechanism; Secretory structures; Secretory tissues. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300411 |
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| Martins,Kellen C; Souza,Sérgio Alessandro M; Pereira,Telma Nair S; Rodrigues,Rosana; Pereira,Messias G; Cunha,Maura Da. |
| This study characterised pollen grains morphologically and studied the genetic divergence between accessions based on morphopollinic characters. Seven accessions, including domesticated, semi-domesticated and wild species of Capsicum (C. annuum var. annuum, C. chinense, C. baccatum var. pendulum, C. frutescens, Capsicum annuum var. glabriusculum, C. baccatum var. baccatum and C. parvifolium), were cultivated in a greenhouse and their pollen grains collected and fixed during flowering. The pollen grains were acetolysed and described based on 13 pollinic characteristics (polar and equatorial axes, in an equatorial front view; ratio between polar axis and equatorial axis; equatorial axis in a polar view; thicknesses of the exine, sexine and nexine; apocolpus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanaceae; Capsicum spp. multivariate analysis pollen grains. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000400010 |
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| Oliveira,Jurandi Gonçalves de; Bressan-Smith,Ricardo Enrique; Campostrini,Eliemar; Cunha,Maura Da; Costa,Ernani Santos; Torres Netto,Alena; Coutinho,Kelly da Silva; SILVA,Marcelo Gomes da; Vitória,Angela Pierre. |
| Gelled aspect in papaya fruit is typically confused with premature ripening. This research reports the characterization of this physiological disorder in the pulp of papaya fruit by measuring electrolyte leakage, Pi content, lipid peroxidation, pulp firmness, mineral contents (Ca, Mg and K - in pulp and seed tissues), and histological analysis of pulp tissue. The results showed that the gelled aspect of the papaya fruit pulp is not associated with tissue premature ripening. Data indicate a reduction of the vacuole water intake as the principal cause of the loss of cellular turgor; while the waterlogged aspect of the tissue may be due to water accumulation in the apoplast. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ultrastructural alterations; Cell turgor; Fruit quality; Physiological disturbances; Biochemical alterations. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452010000400003 |
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