Effect of gamma, Laser irradiation and progestrone on growth and photosynthetic pigments of gerbera
2010
Metwally, S.A. | Awad, A.E. | Abou Leila, B.M.H. | El-Shamy, H.A.
This study was carried out during the two successive seasons of 2006-2007 in natural conditions at lath greenhouse of National Research Centre, to study the effects of different progesterone (prog.) concentrations (10, 20, and 30 ppm), gamma (y) rays doses (100,150 and 250 rad), helium neon laser (He-Ne)exposure time (1, 5.5 and 11.5 min) and argon laser rays (Ar) exposure time (1, 7.5 and 15.5 min) or some interaction treatments between those treatments on vegetative growth parameters and photosynthetic pigments (Total chlorophyll and carotinoids contents in leaves) in small offshoots from healthy mother plants of Gerbera jamesonii cv Superba. The obtained data showed that all the single treatments of progesterone, gamma rays, laser irradiation and their interaction ,significantly increased vegetative growth, in most cases compared with untreated plants. The highest values in vegetative growth parameters (plant height, leaf area, fresh and dry weight of leaves, number of leaves ... ect.), and (carotenoids and total chlorophyll) were tamed from treated plants with, the single treatments of ester one at 30 and 20 ppm, as well as gamma irradiation at 150 argon rays at 7.5 min and the interaction treatments (gamma at 150 rad and grog. at 20 ppm), (Ar at exposure time 15.5 min Dollars need with both of prog. at 10 and/or 20 ppm) and the combined nt (He-Ne at 5.5 min and prog. at 30 ppm).
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