The Growth and Respiration of the Avena Coleoptile

On the Relation between Growth and Respiration in the Avena Coleoptile

1. The growth of Avena coleoptile sections in sucrose and auxin solutions is inhibited by various substances which are known to act as dehydrogenase inhibitors. 2. Iodoacetate, which is particularly active in this connection, inhibits all growth at a concentration of 5 x 10(-5) M, but produces only a slight inhibition of oxygen uptake. 3. The growth inhibition by iodoacetate is completely remov...

Simulated Low-gravity Environments and Respiratory Metabolism in Avena Seedlings.

Using horizontal and vertical axis clinostats and sand-grown oat seedlings (Avena sativa), it was found that horizontal clinostat rotation at 2 rpm increased respiration and inorganic and organic phosphorus content of seedlings. Increased coleoptile geotropism and root growth are attributed to rotational nullification of the directional component of the gravitational stimulus. These growth modi...

The Relation Op Protoplasmic Streaming- in the Avena Coleoptile to Respiration and Auxin Transport

Rapid Inhibition of Auxin-induced Elongation of Avena Coleoptile Segments by Cordycepin.

The effects of cordycepin (3'-deoxyadenosine), an RNA synthesis inhibitor, on auxin-induced elongation in Avena coleoptile segments were studied with a position-sensing transducer. Cordycepin rapidly inhibited auxin-stimulated growth in the coleoptile segments whether added before, at the same time as, or after, the 2 mum auxin treatment. Midcourse additions of 100, 50, and 25 mug/ml cordycepin...

Effect of Galactose on Growth and Metabolism of Avena Coleoptile Sections.

1. BONNER, J. and FOSTER, R. J. The growth-time relationships of the auxin-induced growth in Avena coleoptile sections. Jour. Exptl. Bot. 6: 293-302. 1955. 2. COOIL, B. and BONNER, J. Effects of calcium and potassium ions on the auxin-induced growth of Avena coleoptile sections. Planta (In press). 3. HEYN, A. N. J. Der Mechanisms der Zellstreckung. Rec. trav. bot. neerl. 28: 113-244. 1931. 4. H...