Document Details
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Document Type |
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Thesis |
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Document Title |
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Effect of Drought and salinity on the Germination and growth of sweet basel تأثير الجفاف والملوحة علي انبات ونمو نبات الريحان أو سيمم لاسيليكم ل |
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Subject |
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Biological |
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Document Language |
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Arabic |
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Abstract |
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The present study was to invistigate the effect of drought and salinity on germination, growth and some physiological processes of Ocimum bas.ilicum L. The adopted levels of soil moisture were 100%, 75%, 65%, 50% and 35% field cabacity (f.c.) while the salinity treatments were (0, 10, 25,50,75, 100, 150,200 mM NaCI). The following parameters were studied: germination, photosynthetic pigments, plant height, root length, leaf area, frish and dry weight, water content, growth rate, minerals (Calcium, Potassium, Magnesium, Sodium and Phosphorus) and other metabolic products such as nitrogen, proline and proteins. The results are as follows: Soil water deficit caused a reduction in the daily and final germination rate, decreased the content of Photosynth- etic pigment.s, th.e plant hight, leaf area, frish and dry weight but, howevere, there was an increase in the length of root system. A significant increase in the relative water content of shoot and root was noticed in plants grown under 35% f.c., but there was a reduction in the growth rate under the same treatment, that were noted between the first and second harvests. The increase of water stress caused an increase of Mg +2, N a +; Ca +2 and N a + in the shoot, specially in the second and last harvests where by the K+ content was increased. In the root, there were an increase in Ca +2, K + but the decrease in Mg+2 and N a + has no clear trend. Nitrogen, Proteins and Phosphours were reduced with the increased in the water stress, specially in plants grown under (65%, 50%, and 35% f.c). a remarkable increase in the proline content was noticed with the increase in the water stress. The increase in Salinity has induced a reduction in both the daily and final germination rate, but however, the g~rmination rate was higher in the light than in the dark, in all treatments. The photosynthetic pigments, plant height, root length, leaf area, frish and dry weight were all significantly decreased with increasing salinity, specially in plants grown under 100, -150 and 200 mM NaCI. The plants have died at these treatments before the last harvest. The relative water content of the shoot and root and the growth rate were significantly reduced with increasing .salinity. There was a high accumulation of Na in the shoot of O. basilicum L. the shoot content of other cations (K+, Ca+2, Mg+2), N. and Protains also increased while the proline content showd a remarkable increase. |
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Supervisor |
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Prof. Abdulrahaman Saeed Al-Hajar |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1417 AH
1996 AD |
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Co-Supervisor |
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Prof. Hassan Saeed Al-Zahrani |
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Added Date |
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Thursday, June 12, 2008 |
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Researchers
| خميس غائب الزهراني | Al-Zahrani, Khamis Gaib | Researcher | Master | |
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