PJB-2018-135
Regulations of volatile oil production in irrigated ornamental plants with mannitol- induced short-term drought stress
Amal Fadl Abdelkader
Abstract
Drought stress is an environmental serious problem threatening cultivated ornamental plants in water-depleted regions. The aim was drought stress induction in three medicinal plants (Ocimum basilicum, B, Mentha longifolia, M and Origanum majorana, O) using 250 mM mannitol for ten days. The results viewed that proline level has increased in all drought-stressed plants compared to the control. Four protein bands (210, 70, 63 and 18 kDa) have disappeared in stressed B-plant, in addition to the newly expressed protein bands at low molecular weight ranges (16-78 kDa). The protein polymorphism varied and ranged from 16.66% to 54.54%. RAPD-DNA technique indicated high similarity of genomic DNA in stressed plants compared to control plants. GC-MS screened intensive fluctuations within the phytochemical compounds pool. The genomic DNA structure was stable under drought stress; undergo expression of new genes that mediated the expression of new proteins. The new proteins subsequently induced the induction of chemical compounds with antioxidant property to cope with the drought stress.
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