Abstract
White light suppressed the stem growth and promoted leaf expansion. With increased irradiance the light effect was enhanced. The morphogenetic effects induced by light and by dwarf-mutation are similar. However, the nature of phenotyplc and genotyplc dwarfism is different. In the dwarf mutants the auxin level is not changed in contrast to the GA, ABA and QGC contents. Under high irradiance which depressed the stem growth, auxin and GA-levels were lowered while the content of QGC and of growth-inhibitor non-identical with ABA increased, but the level of ABA was not affected. The sensitivity of various pea forms to the light and to exogenous phytohormones (GA and IAA) is different. The plants with the shortest stems were more sensitive to light and GA. Data on the stem growth and rhizogenesis induced by light and by GA are presented. The metabolism of 2-14C-PCA (precursor of QGC) in tall and dwarf forms is different. The possible role of phytohormones and some phenolic compounds in the regulation of growth and morphogenesis of phenotyplc and genotyplc dwarf forms is discussed.
Published Version
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