Osmoregulation by Oat Coleoptile Protoplasts (Effect of Auxin)

The Effect of Auxin on Synthesis of Oat Coleoptile Cell Wall Constituents ' " 2

In the previous paper (2) we reported that a substantial increase in gross cell wall synthesis occurs when oat coleoptile cylinders whose elongation is inhibited by Ca+ + are treated with IAA; this effect of auxin is direct in the sense that it is due to hormone action rather than to the occurrence of elongation. This paper presents information on the components of the cell wall whose synthesis...

The Effect of Auxin on Synthesis of Oat Coleoptile Cell Wall Constituents.

In the previous paper (2) we reported that a substantial increase in gross cell wall synthesis occurs when oat coleoptile cylinders whose elongation is inhibited by Ca+ + are treated with IAA; this effect of auxin is direct in the sense that it is due to hormone action rather than to the occurrence of elongation. This paper presents information on the components of the cell wall whose synthesis...

Red light and auxin effects on rubidium uptake by oat coleoptile and pea epicotyl segments.

Apical segments of etiolated oat (Avena sativa L. cv. Victory) coleoptiles showed enhanced uptake of [(86)Rb(+)] when tested 30 minutes after a 5-minute red irradiation. The response was partly reversible by far red light. Uptake was sensitive to carbonyl cyanide m-chlorophenyl hydrazone, but not to isotonic mannitol. Indoleacetic acid (10(-7) molar) caused a very pronounced and rapid stimulati...

Osmoregulation in the Avena coleoptile in relation to auxin and growth.

A study has been made of the effects of auxin and growth on the ability of Avena coleoptile sections to osmoregulate, i.e. to take up solutes so as to maintain their osmotic concentration, turgor pressure, and growth rate. The high auxin-induced growth rate of Avena coleoptiles is maintained when cells are provided sucrose, glucose, NaCl, or KCl as a source of absorbable solutes, but not when 2...

Sugar composition of oat-coleoptile cell walls.