Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Registro completo
Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Growth, photosynthesis and leaf water potential in young plants of Copaifera langsdorffii Desf. (Caesalpiniaceae) under contrasting irradiances.
Autores:  RONQUIM, C. C.
PRADO, C. H. B. A.
SOUZA, J. P. de
Data:  2011-01-25
Ano:  2010
Palavras-chave:  Cerrado
Feixes de irradiância
Fluorescência da clorofila
Partição da biomassa
Sobrevivência
Trocas gasosas foliares
Resumo:  Growth and leaf nutrient content were compared in young potted plants of Copaifera langsdorffii in sunny and shaded areas without water stress. Besides, carbon assimilation and leaf water relations were evaluated by net photosynthesis, potential photochemical efficiency and leaf water potential during daily courses in dry and rainy periods under natural conditions in both contrasting irradiances. Higher values of total biomass, height and leaf area occurred in sunny than in shaded area. On the other hand, all young plants survived in shade under natural water stress probably by reason of fast and intense biomass accumulation in favor of roots in early development. There was no significant difference about nutrient concentration in leaves between plants growing in sunny and shaded areas. Net photosynthesis in shade increased occasionally when bunches of direct light reached the leaves. Theses sunflecks took place more frequently and at high intensity in dry period but they were more effective for net photosynthesis in rainy period. The ability of young plants to persist under natural conditions in contrasting irradiance up to 1,230 days after sowing could explain the wide distribution of C. langsdorffii in Cerrado physiognomies and in different types of forest.

2010
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  1677-0420

2988

http://www.alice.cnptia.embrapa.br/handle/doc/874412

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/25938/1/v21n3a04.pdf
Editor:  Brazilian Journal of Plant Physiology, v. 21, n. 3, p. 197-208, 2009.
Relação:  Embrapa Monitoramento por Satélite - Artigo em periódico indexado (ALICE)
Fechar
 

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