SOME STUDIES ON THE EFFECT OF PUTRESCINE, ASCORBIC ACID AND THIAMINE ON GROWTH, FLOWERING AND SOME CHEMICAL CONSTITUENTS OF GLADIOLUS PLANTS AT NUBARIA

Abstract

Two field experiments were carried out at Research and Production Station, Nubaria of National Research Centre, Dokki, Cairo, Egypt, during 2006 and 2007 seasons, to study the effect of application of putrescine, ascorbic acid and thiamine each of them (50, 100, and 200 ppm) on vegetative growth, flowering and some chemical constituents of Gladiolus grandflorum L. plants. Promising results were obtained by application of putrescine at 200 ppm followed by ascorbic acid and Thiamine at 100 ppm on vegetative growth. While on flowering parameters, the best results were obtained by application of putrescine and ascorbic acid at 200 ppm followed by thiamine at 100 ppm. The highest recorded data were obtained in plants treated with putrescine 200 ppm on chemical constituents, (chl a, b, carotenoids, soluble sugars, total phenols, total indols, N, P and K). ascorbic acid at 200 ppm showed a stimulatory effect on all chemical constituents except photosynthetic pigments which increased when plants treated with 100 ppm. Increasing concentration of thiamine from 50 to 200 ppm caused increased soluble sugars, total phenols and total indols.