Morfoanatomia e ontogênese da sâmara de Pterocarpus violaceus Vogel (Fabaceae: Faboideae)

Nakamura, Adriana Tiemi; Oliveira, Denise María Trombert

doi:10.1590/s0100-84042005000200016

Cited by 10 publications

(11 citation statements)

References 13 publications

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“…Meristematic activity in Fabaceae is usually associated with the adaxial meristem, as seen in Arachis hypogaea (Russell 1931), Dalbergia nigra (Paoli 1992), Inga fagifolia (Oliveira and Beltrati 1993), Tipuana tipu (Martins and Oliveira 2001), Hymenaea stigonocarpa (Paiva and Oliveira 2004), Schizolobium parahyba (Pietrobom and Oliveira 2004), and Pterocarpus violaceus (Nakamura and Oliveira 2005). An active subadaxial meristem is less frequently observed, but it was noted in the ontogeny of the pericarp of Dalbergia miscolobium, together with slight adaxial meristematic activity (D.D.…”

Section: Discussionmentioning

confidence: 99%

Anatomy and ontogeny of the pericarp of Pterodon emarginatus Vogel (Fabaceae, Faboideae), with emphasis on secretory ducts

Paiva¹,

Oliveira²,

Machado

2008

An. Acad. Bras. Ciênc.

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Discrepant and incomplete interpretations of fruits of Pterodon have been published, especially on the structural interpretation of the pericarp portion that remain attached to the seed upon dispersal. The present work clarified these doubts and analyzed ultrastructural aspects of the Pterodon emarginatus diaspores using light and transmission electron microscopes. Cell divisions are prevalent among the initial phases of development, and the subadaxial and adaxial meristems form the fibrous inner mesocarp and the endocarp composed of multi-seriate epidermis, respectively. At the median mesocarp, numerous secretory ducts differentiate between the lateral bundles, by lytic process. After lysis of the central cells and the formation of the lumen, the ducts show unistratified secretory epithelium with dense cells; oil droplets are observed on the secretory epithelium and the subadjacent tissues. At maturity, the uniseriate exocarp and the outer mesocarp slough off in an irregular fashion, leaving the diaspore composed of a papery and brittle wing linked to a seed chamber that includes the median mesocarp composed of lignified cells, bordering vascular bundles and many secretory ducts whose epithelial cells develop large vacuoles that accumulate oleoresins. The Pterodon emarginatus fruit is a cryptosamara.

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Section: Discussionmentioning

confidence: 99%

Anatomy and ontogeny of the pericarp of Pterodon emarginatus Vogel (Fabaceae, Faboideae), with emphasis on secretory ducts

Paiva¹,

Oliveira²,

Machado

2008

An. Acad. Bras. Ciênc.

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“…According to Roth (1977), fruits that become lignified before the seeds are fully grown often form a soft tissue that can be compressed to accommodate the developing seed. Seed cushions are common in the Leguminosae (Martins & Oliveira 2001;Pietrobom & Oliveira 2004;Nakamura & Oliveira 2005), and are always associated with dry pericarps. No previous reference of the existence of this structure in the Malpighiaceae was found, which can be explained by the dearth of anatomical and ontogenetic studies of dry fruits, especially samaras in this family.…”

Section: Discussionmentioning

confidence: 99%

“…Kuntze (Martins & Oliveira 2001), Pterocarpus violaceus Versão eletrônica do artigo em www.scielo.br/abb e http://www.botanica.org.br/acta/ojs Vogel (Nakamura & Oliveira 2005) and Centrolobium tomentosum Guill. ex Benth.…”

Section: Discussionunclassified

Pericarp structure in Banisteriopsis C.B.Rob. and Diplopterys A.Juss. (Malpighiaceae): new data supporting generic segregation

Souto

Oliveira

2012

Acta Bot. Bras.

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Palavras-chave: Banisteriopsis campestris, Banisteriopsis oxyclada, Banisteriopsis stellaris, Diplopterys pubipetala, Ontogênese ABSTRACT(Pericarp structure in Banisteriopsis C.B.Rob. and Diplopterys A.Juss. (Malpighiaceae): new data supporting generic segregation). Molecular studies have indicated that some species of Banisteriopsis would be more appropriately placed in Diplopterys. Both of these genera are neotropical members of the Malpighiaceae, a family that is widely diverse in South America, especially in the Brazilian savanna (cerrado). Studies concerning the anatomy of the reproductive organs of Malpighiaceae from the cerrado are very rare. Thus, the present work describes the morphology, anatomy, and ontogeny of the pericarp of B. campestris, B. oxyclada, B. stellaris, and D. pubipetala, comparing them and identifying characteristics that could support the segregation of genera. The fruits of Banisteriopsis studied here demonstrate structures very similar among themselves, while D. pubipetala shows numerous differences. The fruits of all species are schizocarpic and formed by three samara with dorsal wings, while the fruits of D. pubipetala also have lateral winglets on the seed chamber. The mesocarp of the Banisteriopsis species has groups of thick and elongated cells, while these cells form a continuous band in D. pubipetala; the endocarp of D. pubipetala proliferates markedly, forming an aerenchyma layer not seen in Banisteriopsis. Besides the homogeneous structure of the pericarp of the Banisteriopsis species, all referred distinctive characteristics support the maintenance of D. pubipetala in a different genus.

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“…Estudos ontogenéticos em espécies de Fabaceae mostraram que as camadas fibrosas do endocarpo são formadas a partir da epiderme ovariana uniestratificada, que sofre divisões periclinais após a fecundação (Pietrobom & Oliveira 2004;Nakamura & Oliveira 2005). Este tipo de divisão não ocorre em Aspidosperma polyneuron (Apocynaceae), em que há um tecido interno pluriestratificado diferenciado já no ovário da flor em pré-antese, o qual origina o endocarpo (Souza & Moscheta 1992).…”

Section: Discussionunclassified

Morfo-anatomia de frutos secos em espécies de Apocynaceae: significado ecológico e evolutivo

Gomes

2008

Acta Bot. Bras.

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RESUMO -(Morfo-anatomia de frutos secos em espécies de Apocynaceae: significado ecológico e evolutivo). Frutos secos predominam entre as espécies de Apocynaceae, especialmente aqueles do tipo folículo, apontado na literatura para Aspidosperma parvifolium A.DC., Mesechites mansoana (A.DC.) Woodson e Prestonia coalita (Vell.) Woodson. Frutos fechados e abertos destas espécies foram examinados anatomicamente com o objetivo de confrontar suas características com aquelas de outras espécies da família. Constatou-se que os frutos de P. coalita são cápsulas bicarpelares septicidas, significando a presença de dois tipos de frutos neste gênero, em lugar de apenas um, como se pensava anteriormente. Cápsulas podem estar presentes em outras espécies de Prestonia e em outros gêneros da família relatados como tendo folículos. Para Apocynaceae, alguns caracteres taxonômicos devem ser considerados, como espessura e número de camadas das regiões e sub-regiões do pericarpo; presença de aerênquima, esclereídes, fibras longitudinais não-lignificadas ou idioblastos secretores no mesocarpo; posicionamento dos feixes vasculares no mesocarpo; espessura do endocarpo e orientação de suas fibras; presença de costas internas no pericarpo. Adicionalmente, discutiu-se sobre o papel das costas internas do pericarpo e das fibras não-lignificadas do mesocarpo para o mecanismo xerocástico. Desenvolveu-se um teste de desidratação total para determinar a curvatura máxima do pericarpo, relacionando as implicações com a deiscência. Palavras-chave: deiscência, folículo, cápsula, evolução, CerradoABSTRACT -(Morphoanatomy of dry fruits in Apocynaceae species: ecological and evolutionary significance). Dry fruits predominate in Apocynaceae species, especially the follicle type reported for Aspidosperma parvifolium A.DC., Mesechites mansoana (A.DC.) Woodson and Prestonia coalita (Vell.) Woodson. Anatomical analysis of intact and open fruits was carried out to compare characteristics with those of other species of this family. We found that the fruit of P. coalita is a bicarpellary septicidal capsule, showing that this genus has two types of fruits instead of one as previously thought. Capsules may be found in other Prestonia species and in other Apocynaceae genera reported as having follicles. For Apocynaceae, some taxonomic characters should be considered such as thickness and number of pericarp layers and sublayers; presence of aerenchyma, sclereids, non-lignified fibres, secretory idioblasts in the mesocarp; vascularbundle position in the mesocarp; endocarp thickness and fibre orientation; presence of internal ribs in the pericarp. Furthermore, the role of the internal ribs of the pericarp, as well as the non-lignified mesocarp fibres for the xerocastic mechanism are discussed. A total dehydration test was developed to determine maximum pericarp curvature and its implications for the dehiscence process.

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Morfoanatomia e ontogênese da sâmara de Pterocarpus violaceus Vogel (Fabaceae: Faboideae)

Cited by 10 publications

References 13 publications

Anatomy and ontogeny of the pericarp of Pterodon emarginatus Vogel (Fabaceae, Faboideae), with emphasis on secretory ducts

Anatomy and ontogeny of the pericarp of Pterodon emarginatus Vogel (Fabaceae, Faboideae), with emphasis on secretory ducts

Pericarp structure in Banisteriopsis C.B.Rob. and Diplopterys A.Juss. (Malpighiaceae): new data supporting generic segregation

Morfo-anatomia de frutos secos em espécies de Apocynaceae: significado ecológico e evolutivo

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