Effects of Ethylene and Gibberellic Acid on Cellular Growth and Development in Apical and Subapical Regions of Etiolated Pea Seedling
AUTOR(ES)
Stewart, Robert N.
RESUMO
Subhook swelling of 4-day-old etiolated pea seedlings (var. Alaska), caused by 0.5 microliter per liter ethylene, was prevented by preincubation and continued growth in 0.1 mm gibberellic acid (GA). The subhook region exhibited normal elongation and cell size and volume. However, inhibition of elongation and cessation of cell division caused by 0.5 microliter per liter ethylene in the apical hook region of the etiolated pea stem were not overcome by GA. Most of the arrested cells were in G2. These data suggest a possible interaction of GA and ethylene in cell enlargement in the subhook region of the etiolated pea seedlings. They also suggest a different mode of action by ethylene in the apical hook region where the ethylene effect was not counteracted by GA.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=541491Documentos Relacionados
- Blockage by Gibberellic Acid of Phytochrome Effects on Growth, Auxin Responses, and Flavonoid Synthesis in Etiolated Pea Internodes 1
- Effects of Gibberellic Acid, Calcium, Kinetic, and Ethylene on Growth and Cell Wall Composition of Pea Epicotyls
- Ethylene-forming Systems in Etiolated Pea Seedling and Apple Tissue
- Influence of Ethylene on Indole-3-acetic Acid Concentration in Etiolated Pea Epicotyl Tissue
- Ethylene Effect on Extensin and Peroxidase Distribution in the Subapical Region of Pea Epicotyls 1