Data/hora: 23/06/2024 02:21:41

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 21/05/1998
Data da última atualização: | 21/05/1998
Autoria: | HIRSCH, A. M.; TORREY, J. G.
Afiliação: | Harvard University, 16 Divinity Avenue, Cambridge, MA, U.S.A.02138.
Título: | Ultrastructural changes in sunflower root cells relation to boron deficiency and added auxin.
Ano de publicação: | 1980
Fonte/Imprenta: | Candian Journal Botany, v.58, p.856-866, 1980.
Idioma: | Inglês
Conteúdo: | The responses of sunflower root cells to conditions of boron deficiency and to the addition of exogenous auxin were studied on the utrastructural level. Although gross morphological effects such as inhibition of root elongation and a change in the direction of cell expansion from longitudinal to radial are similar in both auzin-treated and boron-deficient seedling roots. ultrastructural changes are different in the two treatments. An increase in cell wall thickness and a loss of membrane integrity are seen as early as 6h in seedlings grown without boron. Auxin-treated root cells do not show this response. A role for boron may involve maintenance of membrane integrity rather than determining endogenous auxin levels.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (17067-1) - ADC - SP - -- - S11294 -  - S11294 - DIS