Ethylene Effect on Extensin and Peroxidase Distribution in the Subapical Region of Pea Epicotyls 1
AUTOR(ES)
Cassab, Gladys I.
RESUMO
In dark grown pea (Pisum sativum) seedlings ethylene causes the triple response in which elongation growth is inhibited, radial growth is promoted, and orientation of shoots to gravity is altered. The distribution of extensin and peroxidase activity in pea epicotyls upon ethylene treatment was studied by tissue printing on nitrocellulose paper. It was found that the localization of extensin and peroxidase activity changes after 72 and 96 hours of ethylene treatment. In untreated plants, peroxidase activity is detected only in the vascular bundles. Nonetheless, after 72 and 96 hours of ethylene treatment peroxidase activity is hardly detected in the vascular system but present in the epidermal and cortical cells. Extensin increases in the epidermal and cortical cells upon ethylene treatment but it also appears in the vascular system when peroxidase activity is no longer detected.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1055615Documentos Relacionados
- Effect of Red Light on Geotropism in Pea Epicotyls 1
- Effects of Ethylene, Kinetin, and Calcium on Growth and Wall Composition of Pea Epicotyls
- Effects of Ethylene and Gibberellic Acid on Cellular Growth and Development in Apical and Subapical Regions of Etiolated Pea Seedling
- Effect of Ethylene Treatment on Polar IAA Transport, Net IAA Uptake and Specific Binding of N-1-Naphthylphthalamic Acid in Tissues and Microsomes Isolated from Etiolated Pea Epicotyls 1
- Effects of Gibberellic Acid, Calcium, Kinetic, and Ethylene on Growth and Cell Wall Composition of Pea Epicotyls
