Caractérisation de certaines souches de Rhizobia associés à la culture d’arachide (Arachis hypogaea L.) à haut potentiel de solubiliser le phosphore dans la région de Ghardaïa

الموضوعات

علوم بحتة وطبيعية

الملخص

To study the microsymbiotes associated with the cultivation of groundnut (Arachishypogaea L) in the region of Ghardaïa. 15 samples of Rhizobia were isolated from groundnutplants growing in Sebseb, Jedid and Mansoura regions.The morphological tests show that 60% of the samples belong to the genus Rhizobium, whichis characterized by their rapid growth and the acidifying effect on the YMA + BTB culturemedium, while the remaining 40% are Bradyrhizobium by their slow-growing and alkalingeffect. This is confirmed by phenotypic tests: nutritional, physiological and biochemical.The nutritional test revealed that the tested groundnut strains showed a similar assimilation ofcarbon sources as fast-growing and slow-growing strains. And for the nitrogen source, it hasbeen observed that some amino acids can inhibit their growth.A broad resistence to NaCl, pH was noticed for all isolated samples.The fifteen samples of Rhizobia were tested for their ability to solubilize the inorganicphosphate TCP by using a PVK solid medium and it was found that all of them have veryhigh solubilization potentials with solubilizing halos in the range of 10-35 mm in diameter.As a result, it can be said that the isolated strains have a high capacity of solubilizing Pi,which is a main advantage of using Rhizobium as a phosphate solubilizing microorganism thislatter is useful for both the mobilization of phosphate and the Nitrogen fixation.

روابط وملفات

التعريف والنوع

رقم الوثيقة

fb31fad7-b6b3-45a3-aac0-46c410f91f26

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

ماستر (LMD)

نوع الملف

pdf text

أسماء الملفات

955833_1.pdf

بيانات النشر

ألقاب المؤلفين

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اللغة

French

المصدر والدورية

اسم المصدر

Caractérisation de certaines souches de Rhizobia associés à la culture d’arachide (Arachis hypogaea L.) à haut potentiel de solubiliser le phosphore dans la région de Ghardaïa

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

groundnut, Arachis hypogaea L, Rhizobia, Bradyrhizobium, strains, phosphate Arachide, Arachis hypogaea L, Rhizobium, Bradyrhizobium, isolat, phosphate.

إشراف وإعداد

الإشراف

محمد كريمات

الإعداد

ايمان بن بطور, مريم بالحاج راس

الاقتباسات الببليوغرافية