FACTORS AFFECTING ROOT FORMATION OF PHASEOLUS VULGARIS.

摘要: The successful rooting of leafy cuttings involves three physiologically distinct processes: initiation root primordia; development true roots from these initials; and maintenance the cutting as an excised organ during rooting. first these, where it does not take place spontaneously, can be brought about in many plants by treatment with auxin. second (outgrowth roots) formation cell-wall protoplasm; therefore requires supply carbohydrates nitrogenous materials, together such special substances may needed for growth. Normally all materials would supplied leaves or storage stem. Too little attention has been paid up to now third process, cutting, which, view conditions that obtain when are severed plant, is great importance. Thus, pointed out Chibnall (4), detached leaf plants, including Phaseolus, undergoes a rapid extensive proteolysis. present experiments were, therefore, designed shed some light on processes. It was our intention study influence nutrition, especially nitrogen other external chemical factors herbaceous material. Since internal must also considered study, r?le auxin separate r?les