الفهرس 
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Abstract
V. SUMMARY AND CONCLUSION
This study was carried out at The Experimental Station of The Botany Department, Faculty of Agriculture, Moshtohor, Benha University during the two growing successive seasons of 2007 and 2008 on sesame (Sesasum indicum L. var. Sandawel 3) plants.
The aim of this study was to investigate the effect of some bioregulators such as benzyladenine (BA) at 20, 40 and 60 ppm, putrescine (Put) at 25, 50 and 100 ppm and salicylic acid (SA) at 25, 50 and 100 ppm at 30, 55 and 80 days after sowing on some morphological and physiological characteristics as well as, seeds yield and seeds quality of sesame plants compared with control treatment.
The obtained results could be summarized as follows:
I. Vegetative growth:
a) The use of foliar application of bioregulators (BA, Put and SA) significantly increased the all vegetative characteristics i.e., root and stem length, number of leaves/ plant, leaf area/plant and fresh weight of root, stem, leaves and capsules/plant.
b) Moreover, foliar application of Put at 100 ppm and BA at 40 ppm gave the highest values in all vegetative characteristics of sesame plant at both 45 and 75 days after sowing during 2007 and 2008 seasons.
c) Different bioregulators treatment increased net assimilation rate but decreased root/shoot ratio of sesame plant at 75 days after sowing during 2007 and 2008 seasons.
II. Chemical composition:
a) Foliar application of bioregulators increased photosynthetic pigments i.e., chlorophyll a & b and carotenoids as well at 45 and 75 days after sowing during 2008 season. Also, foliar application with BA at 40 ppm gave the highest value in photosynthetic pigments content of sesame leaves followed by Put at 100 ppm and SA at 50 ppm treatment compared with control plants.
b) Different foliar application of bioregulators increased minerals content (N,P,K,Ca and Mg mg/g D.W.) in sesame root and leaves at 45 and 75 days after sowing in 2008 season. Also, various used bioregulators increased iron and zinc contents in sesame root and leaves at 75 days after sowing 2008 season.
c) Moreover, total soluble sugars (mg/g F.W.), total free amino acids (mg/g F.W.), crude protein and total carbohydrates (mg/g D.W.) were increased with different foliar application of all used bioregulators in leaves of sesame plants at 45 and 75 days after sowing in 2008 season.
d) High content of total carbohydrates in sesame leaves were obtained using Put at 100 ppm followed by BA at 40 ppm . Meanwhile, high content of crude protein and total free amino acids were obtained by the application of BA at 40 ppm followed by Put at 100 ppm compared with control plants and other treatments during 2008 season.
III. Yield and its component:
a) The obtained results clearly showed that different foliar application with bioregulators significantly increased yield i.e., number of capsules, weight of intact capsules, weight of seeds (g)/plant and seeds yield (g)/pot of sesame plant during 2007 and 2008 seasons.
b) Moreover, foliar application of Put at 100 ppm and BA at 40 ppm gave the highest values in number of capsules, weight of seeds and seed yield (g)/plant during 2007 and 2008 seasons.
c) Also, foliar application of Put at 100 ppm and BA at 40 ppm gave the highest values in minerals content, crude protein, total carbohydrates and oil yield/plant in sesame seeds during 2008 season.
d) Foliar application with all used bioregulators decreased saturated fatty acids as well as a marked increase in unsaturated fatty acids: saturated fatty acids ratio.
Finally, it could be concluded that foliar application with Put at 100 ppm or BA at 40 ppm at 30, 55 and 80 days after sowing can be used to increase yield of seeds oil and to improve seed oil quality of sesame plant.