Osmotic Shock Inhibits Auxin-stimulated Acidification and Growth 1
AUTOR(ES)
Rubinstein, Bernard
RESUMO
Cells of oat coleoptiles (Avena sativa L. cv. “Garry”) have been osmotically shocked in order to observe the effect of alterations of the plasma membrane on some auxin responses. When coleoptile sections were treated sequentially with 0.5 m mannitol and 1 mm Na-phosphate (pH 6.4) at 4 C, polar auxin transport and acidification by 1 mM CaCl2 were unaffected, but auxin-stimulated acidification and growth were eliminated. Shock treatment also had no effect on acid-stimulated growth or on freezing point depression by the cytoplasm. It is suggested that osmotic shock modifies a portion of the plasma membrane which interacts with auxin and eventually leads to growth.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=542404Documentos Relacionados
- Auxin-Stimulated NADH Oxidase Purified from Plasma Membrane of Soybean 1
- Selective Inhibition of Auxin-Stimulated NADH Oxidase Activity and Elongation Growth of Soybean Hypocotyls by Thiol Reagents.
- Polyribosomes from Peas: VI. Auxin-stimulated Recruitment of Free Monosomes into Membrane-bound Polysomes
- Effect of Salt on Auxin-Induced Acidification and Growth by Pea Internode Sections 1
- Evidence That Auxin-Induced Growth of Tobacco Leaf Tissues Does Not Involve Cell Wall Acidification1