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Sesame (Sesamum indicum L., family Pedaliaceae) is considered as one of the most important oil crops in Egypt due to its high seed oil content. This study was conducted to study the influence of exogenously applied phytohormones (Salicylic Acid (SA) and kinetin (Kin) on growth and physiological behavior in drought stressed sesame plants. The experiment was designed into 4 groups, control, drought stress, drought treated with SA (0.1, 0.5 and 1 mM) and drought treated with Kin (0.05, 0.1 and 0.5 mM). It was found that drought stress adversely affected all growth parameters of sesame including plant height, fresh weight, dry weight, number of leaves and leaf area. Drought stress caused significant decrease in endogenous phytohormones (SA and Kin), while on treatment of drought stressed sesame plants with SA and Kin increased level of endogenous SA and Kin. On the other hand, drought stress caused significant increase in total soluble protein, poly peptide bands, proline, moreover on treatments with SA and Kin improved all previous substances in drought stressed sesame plants. The SDS-PAGE detection of protein indicated some changes in amount and number of protein bands and also new protein bands appeared in both stressed and phytohormonal treated plants. Therefore, exogenous application of drought stressed sesame plants with salicylic acid or kinetin may induce resistance to drought stress by enhancement of growth and various physiological processes which are negatively affected by drought stress.

Background: Jojoba plants [Simmondsia chinensis (Link) Schneider] are appropriate to the semiarid regions; it has the ability to survive in a harsh desert environment and it is very drought-resistant and can be grown on marginal lands without replacing any existing crops. After that, Jojoba is a new oil-producing industrial crop, oil-producing cash crop, and has much of the interest in worldwide in recent years. So, processes are made to increase the seed yield of jojoba as requirements of essential fertilizer and evaluation of new clones. Two field experiments were conducted on five clones (S-BS-, S-700, 610, S-L, and S-G) aged 3 and 13 years from planting at North Sinai, Egypt on sandy soil to study the effect of foliar spray with nitrogen, phosphorus, and boron with three rates of NPB (00, NPB1 (N 1%, P 0.75%, and B 0.4%) and NPB2 (N 1.5%, P1.25% and B 0.8%)) on oil and other contents of jojoba plants. Results: Results showed that all treatments improved the vegetative growth, yield, and seed quality. Concerning oil, weight of 100 seeds and oil percent in seeds with treatment NPB2 under clone S-700 gave the highest value for all study parameters. Conclusions: Therefore, for improving yield and seed quality, it could be recommended with foliar spray NPB2 (N1.5%, P 1.25%, and B0.8%) under the condition of this study on jojoba plants.

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Aims: This study aims to evaluate the five clones of jojoba plant under the influence of irrigation intervals and the impact on growth and yield of chemical content. Study Design: Two field experiments were carried out for five clones (S-L, S-610, S-700, S-B and S-G), to study the effect of irrigation intervals; one week (control), two weeks and three weeks) on jojoba plants at aged three and thirteen years from planting to investigation growth, yield characters and content seed from oil and some chemical contents.