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

Effect of Peroxyacetyl Nitrate on Growth & Cell Wall Metabolism of Avena Coleoptile Sections.

It was reported earlier (12) that growth of Avena coleoptile sections was inhibited by pretreatment of tissue with photochemically derived oxidants, including peroxyacetyl nitrate (PAN), a naturally occurring air pollutant. Other workers (3,6, 15) showed that cell expansion is dependent on plasticization of the cell wall. Various studies (1, 8,9,10, 11) indicate that metabolism of cell wall con...

Effect of pH and Auxin on Chloride Uptake into Avena Coleoptile Cells.

The effect of pH on (36)Cl(-) movement into coleoptile cells (Avena sativa L. cv. Garry) was investigated and compared with effects of indoleacetic acid. (36)Cl(-) uptake, but not efflux, is stimulated when coleoptile sections are placed in media adjusted to pH levels from 5 to 3 after a preincubation period at pH 6.5. The enhancement is seen within 2 minutes, is not correlated with growth, and...

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...

Steady state growth of avena coleoptile sections in high auxin concentrations.

Bound Indoleacetic Acid in Avena Coleoptiles1

Suninwary. When C14 carboxyl in(loleacetic aci(d (IAA) is transporLe l through Avena coleoptile sections a fraction of the activity becomes bound. The nature of this bound IAA has been investigated. Upon extraction with solvents and chromatography a substance having the RF of IAA in 4 solvents was detected. No evidence could be found for the formation of indoleacetyl conjugates. In pea stem sec...