حيوية حبوب اللقاح في المجتمعات الطبيعية لنبات الزعتر البري Thymus capitatus في منطقة جنوب الجبل الأخضر، برقة، ليبيا.
DOI:
https://doi.org/10.54172/90ygmj19الكلمات المفتاحية:
Pollen viability; acetocarmine staining method; Thymus capitatus; El-Jabal El-Akhdar; Libya.الملخص
حبوب اللقاح الخصبة والحية ضرورية لتكوين البذور، وتعمل بمثابة وسيلة أساسية لتدفق الجينات في الأنواع النباتية مفتوحة التلقيح مثل نبات الزعتر(Thymus capitatus L.). هناك نقص في المعلومات عن خصوبة حبوب اللقاح (حيوية حبوب اللقاح) في العشائر الطبيعية للزعتر البري، والذي ينتشر بصورة طبيعية في منطقة جنوب الجبل الأخضر. في هذا البحث قدرت حيوية حبوب اللقاح باستخدام صبغة الأسيتوكارمين. وقد بينت الدراسة فاعلية هذه الطريقة، فقد كان من الممكن التمييز بين حبوب اللقاح الخصبة (الحية) وحبوب اللقاح غير الخصبة (المجهضة). اشارت النتائج إلى أن الاختلافات في نسب حيوية حبوب اللقاح في العشائر الطبيعية للزعتر الليبي (Thymus capitatus L.) كانت ذات فروق معنوية. فقد سجلت عشيرة النباتات ذات الازهار البيضاء أعلى نسبة لحبوب اللقاح الخصبة (67.61%)، تليها مباشرة عشيرة النباتات ذات الازهار البيضاء المنقطة (57.24%)، بالمقابل سجلت عشيرة النباتات ذات الازهار المبرقشة أقل نسبة لحبوب اللقاح الخصبة (29.86%). العشيرتين: عشيرة النباتات بنفسجية الازهار وعشيرة النباتات ارجوانية الازهار سجلت النسب 55.73% و 42.36% على التوالي. أيضاً بينت النتائج أن هناك تباين في حيوية حبوب اللقاح بين مختلف فترات التجميع. هذه النتائج تشير بأن حيوية حبوب اللقاح في عشائر الزعتر تخضع لفعل العوامل البيئية والعوامل الوراثية.
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