Surface Activity as Related to Physiological Activity of Plant Growth-Regulators

摘要: Among theories proposed to explain the action of plant growth-regulators is one which focuses attention on altered permeability cell membranes caused by adsorption growth-controlling compound this phase boundary. This theory, Veldstra (11), based in part a polarographic investigation effects compounds oxygen maximum were used as measure adsorbability and therefore their physiological activity. Subsequently (12), concept was modified allow for chemical reaction between growth regulator cellular constituents ; results achieved at surface mercury drop according hypothesis must then be considered indicative reactivity well adsorption. The possibility that an examination substances with respect effect might indicate relative or activity first propounded Heyrovsky detailed Rasch (5). According result drop, any reduction (at same potential) due preferential some other substance replaces surface. Another explanation involves electrokinetic stirring electrolyte solution (7) brings reducible ions more rapidly than diffusion alone would. At potential density indifferent cations electrical double layer restricts movement diffusion, whereupon current drops current. Surface active depress maximum, lowering tension subsequent cessation effect. Kolthoff Lingane (2) neither adequately accounts all characteristics but complete probably will include aspects both. number reported few, tests compared rooting cuttings curvature split stems peas. It thought comprehensive effecting elongation together several known