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Assesment the Response of Few Tomato (Lycopersicum Esculentum M.) Types to NaCl – Induced Salinity Stress

تقييم استجابة بعض مدخلات البندورة (Lycopersicum esculentum M.) للإجهاد الملحي(NaCl)

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 Publication date 2003
  fields Field Crops
and research's language is العربية
 Created by Shamra Editor




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This investigation is a mimesis to what usually happens in nature, where the plants are normally exposed to sublethal environmental stresses before their exposure to the lethal level of stresses. The gradual increase of environmental stress, gives plants a suffficient time to prepare their defensive means to withstand the lethal level of stress. In order to develope a suitable screening technique, it was essential to determine the induction as well as the lethal levels of stress, as important components of such proposed tool. This technique was applied to screen some tomato genotypes, and assess the genetic variability among them, in order to evaluate their salinity stress response , and selecting the highly salt tolerant types.


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Research summary
تتناول هذه الدراسة تقييم استجابة بعض أنواع الطماطم (Lycopersicum Esculentum M.) للإجهاد الملحي الناتج عن NaCl. تهدف الدراسة إلى محاكاة الظروف الطبيعية التي تتعرض فيها النباتات لضغوط بيئية دون المستوى القاتل قبل تعرضها لمستويات قاتلة من الإجهاد. تعطي الزيادة التدريجية في الإجهاد البيئي النباتات وقتًا كافيًا لتحضير وسائلها الدفاعية لمواجهة مستويات الإجهاد القاتلة. تم تطبيق هذه التقنية لفحص بعض الأنواع الجينية للطماطم وتقييم التباين الجيني بينها من أجل تقييم استجابتها للإجهاد الملحي واختيار الأنواع الأكثر تحملًا للملوحة. أظهرت النتائج أن المستوى الأمثل للإجهاد الملحي المستحث كان mM NaCl، بينما كان المستوى القاتل mM NaCl. يعتبر سمة النمو التعافي واحدة من أهم المعايير الفينولوجية التي يمكن استخدامها لتحديد الأنواع الجينية للطماطم الأكثر تحملًا للملوحة، حيث تحقق هذه الأنواع نموًا أكبر في نهاية فترة النمو التعافي. أظهرت الدراسة أن الاستحثاث له أهمية كبيرة في تحسين قدرة الشتلات المستحثة بالملح على تحمل مستويات أعلى من الملوحة.
Critical review
دراسة نقدية: تعتبر هذه الدراسة ذات أهمية كبيرة في مجال الزراعة، حيث تقدم تقنية جديدة لتقييم تحمل النباتات للإجهاد الملحي. ومع ذلك، يمكن توجيه بعض الانتقادات البناءة للدراسة. أولاً، لم يتم تحديد القيم الدقيقة للمستويات المستحثة والقاتلة من NaCl، مما يجعل من الصعب تكرار التجربة بدقة. ثانيًا، لم يتم تناول تأثيرات الإجهاد الملحي على الجوانب الأخرى للنباتات مثل الإنتاجية وجودة الثمار. أخيرًا، يمكن أن تكون الدراسة أكثر شمولية إذا تم تضمين أنواع نباتية أخرى للمقارنة وتوسيع نطاق النتائج.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي هو تقييم استجابة بعض أنواع الطماطم للإجهاد الملحي الناتج عن NaCl وتحديد الأنواع الأكثر تحملًا للملوحة.

  2. ما هي المستويات المستحثة والقاتلة من NaCl التي تم تحديدها في الدراسة؟

    المستوى الأمثل للإجهاد الملحي المستحث كان mM NaCl، بينما كان المستوى القاتل mM NaCl.

  3. ما هي السمة الفينولوجية التي تعتبر مهمة لتحديد الأنواع الجينية للطماطم الأكثر تحملًا للملوحة؟

    سمة النمو التعافي تعتبر واحدة من أهم المعايير الفينولوجية لتحديد الأنواع الجينية للطماطم الأكثر تحملًا للملوحة.

  4. ما هي أهمية الاستحثاث في تحسين قدرة الشتلات على تحمل الملوحة؟

    الاستحثاث له أهمية كبيرة في تحسين قدرة الشتلات المستحثة بالملح على تحمل مستويات أعلى من الملوحة.


References used
Al-ouda,A.S. ١٩٩٩.Genetic variability in temperature and moisture stress tolerance in Sunflower(Helianthus annuusL.)hybrids:An assessment based on physiologigal and biochemical parameters.
Carter, D. L. ١٩٧٥. Problems of salinity in agriculture, plants in saline environments (A. Poljakoff – mauber and J, Gale, eds.), springer, Berlin
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