الفهرس 
Vegetative growthOnly 14 pages are availabe for public view
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Abstract
series of pot experinients were conducted at the Experimelkd Station of the Faculty of Agriculture at Kafr El-Sheikh during two successive seasons (199411995 and 199511996) to study the el’iect CCC, morphactin, atrinal and pix at different concentrations on growth, flowering and chemical composition of some ornamental plants. The procedure treatments and the recorded data dlffered according to the plant whether it was slmbs (Sclzinzis tei~ebentlzlfoliz~Rsa ddi and Thevetin ~zel.ifolia Juss) or a sumner flowering aimual (Celosia ylurtzosn 1401-t.) plant as follows: 1- Schin~tste rebentrifolius Radcli: Transplants of 6-month old were thrice sprayed with I- CCC at the rates of 1000, 3000 and 5000 pym. 2- Morphactin at 1, 5 and 10 ppm. 3- Pix at 1, 2 and 5 ppm. As the first spray was on July 7tll in both seasons with thee weeks interval. 2- Tlt evetin iterifolin Juss: Transplailts of 6-month old were thrice sprayed with 1- CCC at the rates of 1000, 3000 and 5000 ppm. 2- Mol-pl~actina t 1, 5 and 10 ppm. 3- Atrinal at 1000, 2000 and 4000 ypm. As the first spray was 011 April 5th in both seasons with thee weeks interval. 3- Celusilz yl~imosa Hurt. : Transplants of 1.5 month old were thrice sprayed wit11 1- CCC at 1000,3000 and 5000 ppm. 2- Morphactin at 1, 5 and 10 ppm. 3- Pix at 1, 2 and 5 ppm. As the first spray was on July 14th in both seasons with three weeks interval. The following results were obtained: 1- Schin~rs terebenthrfolizrs: - All retardants at the lzighest rate of each significantly reduced plant height when compared to control. The most effective treatment in tlis concern was CCC at 5000 ppin followed by rnorphactin at 10 pp then pix at 5 ppm in both seasons. However, the low and medium levels showed stimulatory effects in this respect as gave taller plants than control. - All retardants increased shoot No./plant over control as the effect was proportional to the used level of any retardant and the high rate gave the significantly lzighest values. In tlis concern, the highest shoot No resulted from the treatments of 5 ppm pix followed by 5000 ppm CCC then 10 ppm morp11actin. - Applying retardants led to increase leaf No./plant over control with significant differences in most cases especially at the ligh rate of each retardant. CCC was overall the most effective retardant in tlis concern as gave the hghest values in an ascending order from the low to the high level. - All retardants at the lighest rate significantly decreased leaf area when compared to control in both seasons. In tlis concern the least le a S area resulted fio111 5000 ppm CCC followed by 10 ppm morpllactin in the first season while in the second season the opposite was the right. - Stem diameter was imreased over control due to applying only the high concentration OF each retardant with non-significant differences in most cases for both season. The thicltest stems resulted from applying 10 ppm morpl~actin followed by 5000 ppin CCC then 5 ppm pix. - All retardants illcreased root length over control especially wit11 increasing the used concentration to reach the level of significance at the medium and liigh levels. In this concern tlie longest roots resulted from 10 ppln morpllactin io the first season and 5 ppm pix in the second one. - All retardants increased root No./plant over COII~I-01 as the increase was proportional to the used concentration. 111 this respect the rate of 5 ppm pix gave the highest values in the two seasons. - l’he fi-esh and dry weight of the vegetative parts was increased over control with significant differences in the majority of treatments due to applying the different retardants and especially at the high rate of each. The rate of 5000 ppn proved to be the most effective in this respect for both seasons. - All retardants increased fresh and dry weight of roots over control with signif’icant differences in most cases for both seasou with the superiority of the treatment with 5 ppi~pi x. - All retardants and especially at tlie highest rate increased the leaves contents of chlorophyll a, b and total chloropl~yllo ver control with non-significant differences in most cases for both seasons. In this concern the 5000 ppln rate of CCC pl-oved to be the most effective treatment. - All retarda~ltse specially at the high level increased total carbohydrates % over control with significant ciifferences in both seasons with the superiority of both pix at 5 ppm and CCC at 5000 ppm. - All retardants at any rate sig~~ilicantlinyc reased N% in the leaves over control in the two seasons and the high CCC level (5000 ppm) was the no st effective treatment in this respect. - CIN ratio was higher in the leaves of treated plants with retardants than control in both seasons with the superiority of both pix at 5 ppm and CCC at 5000 p~m. 11.