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Register a new userEvaluation Responses of Seeds Germination in Some Varieties of Cucumber (cucumis sativa) to Drought Stress
تقييم استجابة إنبات بذور أصناف مختلفة من الخيار (sativa cucumis) لإجهاد الجفاف
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أُجريت هذه الدراسة على بذور ستة أصناف من الخيار: نابليون، أمبريس، سنديان، برنس هجـين، سمارة هجين و الخيار البلدي. و قد هدف هذا البحث إلى دراسة استجابة هذه الأصناف للإجهـاد الجفـافي و دراسة معدل إنبات هذه الأصناف و نموها و المقارنة فيما بينها، و ذلك تحت تأثير تراكيـز مختلفـة مـن البولي أتيلين غليكول (10 ،20 و 40 mM /ليتر PEG) التي تم إنبات البذور فيها، أو زراعة البذور في التورب في صواني و ريها بالمحاليل التي تحدث الجفاف الصنعي على هذه النباتات، فضلاً عـن الـشاهد المروي بالماء أو دون ري (تعطيش). أظهرت نتائج هذا البحث تفوق بعض الأصناف في مقاومتها لإجهاد الجفاف. و قد أظهرت الأصناف أمبريس، و برنس هجين و سمارة هجين تحملاً أكبر للإجهاد الجفافي، تبين ذلك بارتفاع نسبة الإنبات و زيادة متوسط طول البادرة مقارنة بباقي الأصناف، و ذلك في التراكيز المرتفعة من محلول البولي إتيلين غليكول الذي تم إنبات البذور فيه أو ري البادرات فيمـا بعـد، بهـدف إحـداث الجفاف الصنعي عليها.
The study was conducted on six varieties of cucumber: Napleon, Ampres, Sendian, Prence, Samara and Baladi. To study the responses of these varieties to drought stress, on the seed germination and seedling growth under different Polyethylen glycol concentrations (0 control, 10 mM, 20 mM and 40 mM PEG). The results of this research showed a some varieties to its tolerance to drought stress. The varieties Ampres, Prence and samara showed more resistance to drought stress. It s indicated with increasing seed germination and growth of seedlings with the higher concentration of PEG in compared to another varieties.
References used
Agnes G., Csiszar, J., Irma T. and, L. Erdei. 2002. Changes in water and chlorophyll fluorescence parameters under osmotic stress in wheat cultivars.Proceedings of the 7th Hungarian Congress on Plant Physiology, 2002, S2-P05
(Dami I. and H.G. Hughes, 1996, Effects of PEG-induced water stress on in vitro hardening of 'Valiant' grape. Plant Cell, Tissue and Organ Culture, Volume 47, pp. 97-101(5
Dapeng, D. Hongqiang, Y., Wensuo, J. and H. Conglin. 2001. Protein phosphorylation is involved in the water stress-induced ABA accumulation in the roots of Malus hupehensis Rehd. Chinese Science Bulletin, Volume 46, Number 10, p. 855-858
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