POLAR TRANSPORT OF AUXIN AND ELECTRICAL POLARITY IN COLEOPTILE OF AVENA

Polar Transport of Auxin and Electrical Polarity in Coleoptile of Avena.

In the introduction to a recent paper by the writer (5), -the phenomenon of the polar transport of auxin in plants was briefly discussed. It was indicated there that the electrical theory of the polar transport of auxin was one of the most widely accepted ones. This theory states that the inherent electrical polarity of plants is the cause of the longitudinal polar transport of the negative ion...

Improved Avena Coleoptile Elongation Test for Auxin'

Sum rv01,1f. A mo(lifie(l )rocedlure is presente(d for the bioassay of aulxin lusilng -Iv'eno coleoptile segments. The modifications introduicedl restult in a substantial improvement of the commonly uised( coleoptile elongatioil tests. The proposed test retains the simplicity of physical reqillremeints and of manipulatioIn characteristic of all elongatioln tests. The maiin featuire of the propo...

Polar Auxin Transport: Cell Polarity to Patterning

Auxin is a signaling molecule with profound influence on plant morphogenesis. Because of its activity gradient-related effects on plant development and response programs, it is considered as a plant morphogen. Auxin displays a spectacular ability to mobilize in a cell-to-cell and polar fashion. Auxin efflux carrier PIN proteins direct this intercellular flow of auxin and thus bear a ratelimitin...

Note on the Effect of Unilateral Illumination on the Transverse Electrical Polarity in the Avena Coleoptile.

Introduction The effect of incandescent light on the electrical potentials of etiolated seedlings has been studied by only a few investigators. WALTm E(7) maintained that etiolated seedlings gave little, if any, electrical response when illuminated. CLARK (1), however, has demonstrated changes in the longitudinal electrical polarity in intact etiolated Avena seedlings when they are uniformly il...

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