تم عزل 13 نوعاً فطرياً تتبع إلى عشر أجناس و ذلك من تسع عينات من بذور عباد الشمس حيث تم العزل على مستنبت بطاطا دكستروز آجار
وورق الترشيح و بمعاملتين ( تطهير سطحي للبذور - بدون تطهير )
و الأنواع هي :
Fusarium ؛Alternaria alternata ؛A. fumigatus ؛A. niger ؛flavus
Mucor ؛Macrophomina phaseolina ؛F. moniliforme ؛solani
؛Rhizopus stolonifer ؛Penicillium chrysogenum ؛racemosus
،Absidia ramosae و Rhizoctonia solani ؛Trichotheium rosum
وقد كان النوع Aspergillus flavus الأكثر تردداً في العينات بنسبة 100 %، و 55 -77% بالنسبة للنوع Alternaria alternata ,وكانت نسبة انبات البذور (0-77%) على مستنبت PDA و (20-81%) على BP
و قد كانت هذه النسبة أقل في معاملات بدون التطهير السطحي للبذور، و قد تراوح المحتوى الرطوبي لعينات البذور بين 7.4-13 % , و لم يظهر ارتباط (0.06=Rمربع) بين النسبة المئوية للبذور المصابة و المحتوى الرطوبي للبذور.
A total of /13/ fungal species belonging to /10/ genera
have been obtained from nine samples of sunflower seeds. The
isolation was on potato dextrose agar media and blotter paper with tow treatments (surface-sterilized seeds- seeds without
sterilization). The species were Aspergillus flavus ; A. niger ; A.
fumigatus ; ؛Alternaria alternate ; Fusarium solani; F. moniliforme ; Macrophomina phaseolina ; Mucor racemosus ; Penicillium chrysogenum ; Rhizopus stolonifer ; Trichotheium rosum ; Rhizoctonia solani and Absidia ramosae . The most prevalent species was Aspergillus flavus with percent frequency 100% and 55-77% for Alternaria alternata. The percentage of seeds germination was between (0-77%) on PDA media and (20-81%) on BP, and it was low in the non-sterile seeds treatment. The moisture content of the seeds was between (7.4-13%), and there is no correlation (R2=0.06) between the percentage of the infected seeds and its moisture content.
References used
ABDULLAH, S. K and AL-MOSAWI, K. A 2010 Fungi Associated With Seeds Of Sunflower (Helianthus annuus ) Cultivars Grown In Iraq, Phytopathologia, vol. 57. 11–20
ARX, V. J. A 1981- The Genera Of Fungi Sporulating In Pure Culture. Third fully revised edition. carmer. germany. 459p
ATAGA, A. E And AKUESHI, C. O1996 Fungi associated with Sunflower Seed in Nigeria. Seed Research Journal, Vol. 24, No. 1. 64-65
BHUTTA A. R, BHATTI, M. H. R, AHMED, I 1997 Effect of Seed-Borne Fungi On Oil Content And Fatty Acid Profile In Sunflower. Helia Vol. 20. 67–72
A survey to record the genera of nematode associated with wheat in the
south region of Syria was carried out during 2002/01. 600 soil samples were
collected from the rhizosphere of wheat and examined. Nematodes were
extracted, identified and frequ
A survey to record the genera of nematodes associated with chickpea of
domestic variety, which are planting at Izra’a Research center in Dara’a
Governorate, was carried out during the period from April 2003 till June 2003.
Nematodes were extracted
The research was executed in Biotechnology Lab (Faculty of
Agriculture – Damascus University), during the season 2016.
Sixteen genotypes of Sunflower Oil were planted to study the
genetic diversity among these genotypes and to determine the
degree of genetic Agreement using the technique SSR (Simple
Sequence Repeats).
A pots experiment was carried out using two soil types (clay loam and sand
soil) to study the interaction between VA-mycorrhizal (My) and some soil fungi
under the effect of rock phosphat on growth of onion plant.
The interaction between mycorrhiz
Root rot is considered one of the serious widely spread tomato diseases in
plastic houses culture of Syria. Soil solarization, using transparent polyethylene
(PE) covering, was applied during July and August (١٩٩٤-١٩٩٦) in Tartoos
governorate for