Data/hora: 07/06/2024 13:27:54

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 31/03/1999
Data da última atualização: | 31/03/1999
Autoria: | KNAPP, A. K.; GILLIAM, F. S.
Afiliação: | Division of Biology, Kansas State University, Manhattan, Kansas.
Título: | Response of Andropogon gerardii (Poaceaea) to fire-induced high vs. low irradiance environments in tallgrass prairie: Leaf structure and photosynthetic pigments.
Ano de publicação: | 1985
Fonte/Imprenta: | American Journal of Botany, v.72, n.11, p.1668-1671. 1985.
Idioma: | Inglês
Conteúdo: | Photosynthetic pigments and several structural characteristics werer measured in leaves of Andropogon gerardii from tallgrass prairie populations in an unburned, low-irradiance site and a buirned, high-irradiance site to determine if these species displayed sun/shade differences similar to those documented in forest species. Early in the growing seasons, leaves of A. gerardii in the low-irradiance, unburned site had significantly lower stomatal density, pore lenght, and conductance, as well as specific leaf mass and thickness than leaves from the high-irradiance, burned site. Moreover, the chlorophyll a:b ratio, carotenoid content, and bundle sheath-vascular complex area were significantly lower, but chlorophyll content (mass/mass) was greater in leaves in unburned vs. burned sites. These differences are consistent with sun/shade adaptations reported for forest understory plants and may contribute to the low productivity of A. gerardii in unburned tallgrass prairie.
Palavras-Chave: | Alto fogo induzido; Estrutura da folha; Fire-induced high; Leaf structure; Photosynthetic pigments; Tallgrass prairie.
Thesagro: | Capim; Fotossíntese; Pigmento.
Thesaurus Nal: | Andropogon gerardii; Poaceae.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (37963-1) - ADD - SP - -- - SP4504 -  - 4504 - DIS