Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 6
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
A COMPARATIVE ANATOMICAL STUDY OF THE STEMS OF CLIMBING PLANTS FROM THE FOREST REMNANTS OF MARINGA, BRAZIL Gayana Botánica
Lopes,Willian A. L.; Souza,Luiz A; Moscheta,Ismar M; Albiero,Adriana L. M; Mourão,Káthia S. M.
Climbing plants differ from self-supporting plants, such as shrubs and trees, in a range of characteristics, most notable are the mechanical properties of the stem. Liana stems as Pereskia aculeata Mill. (Cactaceae), Pisonia aculeata L. (Nyctaginaceae), Arrabidaea mutabilis Bureau et K.Schum. (Bignoniaceae), Dalechampia stipulacea Müll.Arg. (Euphorbiaceae) and Dicella nucifera Chodat (Malpighiaceae) were collected in Brazilian forest remnants. The objective of this paper is: a) to analyze the comparative stem structure of these species; b) to answer the inquiry whether these species present cambial variants or not and to verify the modes of cambial activities, and c) to contribute with the anatomical identification of the liana species, characterizing...
Tipo: Journal article Palavras-chave: Anomalous growth; Climbing plants; Primary growth; Secondary growth; Cambial variant.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432008000100005
Imagem não selecionada

Imprime registro no formato completo
A new vision of the origin and the oocyte development in the Ostariophysi applied to Gymnotus sylvius (Teleostei: Gymnotiformes) Neotropical Ichthyology
França,Gisleine Fernanda; Grier,Harry J.; Quagio-Grassiotto,Irani.
Based on new knowledge coming from marine perciform species, the origin of oocytes and their development in the Ostariophysi, Gymnotus sylvius is described. In both Gymnotus sylvius and marine perciform fish, oogonia are found in the germinal epithelium that forms the surface of the ovarian lamellae. At the commencement of folliculogenesis, proliferation of oogonia and their entrance into meiosis gives rise to germ cell nests that extend into the stroma from the germinal epithelium. Both cell nests and the germinal epithelium are supported by the same basement membrane that separates them from the stroma. At the time of meiotic arrest, oocytes in a cell nest become separated one from the other as processes of prefollicle cells, these being derived from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Folliculogenesis; Primary growth; Secondary growth; Maturation; Ovulation.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400008
Imagem não selecionada

Imprime registro no formato completo
Biomass equations for forest regrowth in the eastern Amazon using randomized branch sampling Acta Amazonica
Ducey,Mark Jonathan; Zarin,Daniel Jacob; Vasconcelos,Steel Silva; Araújo,Maristela Machado.
Forest regrowth occupies an extensive and increasing area in the Amazon basin, but accurate assessment of the impact of regrowth on carbon and nutrient cycles has been hampered by a paucity of available allometric equations. We develop pooled and species-specific equations for total aboveground biomass for a study site in the eastern Amazon that had been abandoned for 15 years. Field work was conducted using randomized branch sampling, a rapid technique that has seen little use in tropical forests. High consistency of sample paths in randomized branch sampling, as measured by the standard error of individual paths (14%), suggests the method may provide substantial efficiencies when compared to traditional procedures. The best fitting equations in this...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allometry; Allometric equations; Secondary growth; Tropical forest.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672009000200013
Imagem não selecionada

Imprime registro no formato completo
Efeitos do paclobutrazol em diferentes concentracoes e periodos de imersao na cultura do alho. Repositório Alice
RESENDE, G.M. de; COSTA, N.D.; MELO, N.F. de; SOUZA, R.J.de.
O presente trabalho foi conduzido no periodo de abril a setembro de 1989 no Campo Experimental do Setor de Olericultura da UFLA, Lavras, MG, com o objetivo de avaliar a influencia de concentracoes e periodos de imersao em paclobutrazol sobre o controle do pseudoperfilhamento e caracteristicas comerciais do alho (Allium sativum L.). Utilizou-se o delineamento experimental de blocos ao acaso em esquema fatorial 4 x 5, compreendendo quatro doses de paclobutrazol (0, 500, 1.000 e 1.500 mg L-1 de i.a.) e cinco periodos de imersao (30, 60, 90, 120 e 150 minutos) e quatro repeticoes. Observou-se, com o incremento das concentracoes de paclobutrazol, uma reducao na altura e no numero de folhas por planta aos 60 e 90 dias apos o plantio. A concentracao de 976 mg L-1...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Allium sativum; Regulador de crescimento; Pseudoperfilhamento; Classificacao de bulbos; Growth regulator; Secondary growth; Bulb classification.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/89574
Imagem não selecionada

Imprime registro no formato completo
Flowering-time genes modulate meristem determinacy and growth form in Arabidopsis thaliana Naturalis
Melzer, S.; Lens, F.; Gennen, J.; Vanneste, S.; Rohde , A.; Beeckman, T..
Plants have evolved annual and perennial life forms as alternative strategies to adapt reproduction and survival to environmental constraints. In isolated situations, such as islands, woody perennials have evolved repeatedly from annual ancestors1. Although the molecular basis of the rapid evolution of insular woodiness is unknown, the molecular difference between perennials and annuals might be rather small, and a change between these life strategies might not require major genetic innovations2,3. Developmental regulators can strongly affect evolutionary variation4 and genes involved in meristem transitions are good candidates for a switch in growth habit. We found that the MADS box proteins SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1) and FRUITFULL...
Tipo: Article / Letter to the editor Palavras-chave: Flowering-time; Meristem determinacy; Growth form; Arabidopsis thaliana; Insular woodiness; Secondary growth; Annual life forms; 42.56.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/429531
Imagem não selecionada

Imprime registro no formato completo
Is the secondary thickening in palms always diffuse? Anais da ABC (AABC)
BOTÂNICO,MARLI P.; ANGYALOSSY,VERONICA.
Unlike other arboreal monocotyledons, the secondary growth of palms has for the past 100 years been described as diffuse. Solely cell enlargement and random parenchyma divisions, without the activity of a meristem, characterize such growth. Some previous works of the early 20th century have, however, mentioned the presence of a secondary meristem in the stems of palms, but this information was forgotten since then. Addressing to this question, we analysed palm stems of four species, with the aim to understand the possible presence of such secondary growth. We found that a meristematic band occurs between the cortex and the central cylinder and gives rise to new vascular bundles and parenchyma internally, producing parenchyma and fibres externally. It...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aerial stem; Meristematic band; Palms; Secondary growth; Stem anatomy; Subterranean stem.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401461
Registros recuperados: 6
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional