الفصل والتقييم الحيوي لتوكسينات عزلات مختلفة لفطر Alternaria solani المسببة لمرض اللفحة المبكرة على الطماطم بمنطقة الجبل الأخضر

Nwara A.  Mohamed; Mohammed A.  Saeed; M.G.  El-Samman; Issa A.  Abugharsa

doi:10.54172/mjsc.v9i1.486

Authors

Nwara A. Mohamed Department of Plant Protection, Faculty of Agriculture, Omar Al-Mukhtar University, P.O. 919 Al-Bayda - Libya.
Mohammed A. Saeed Department of Plant Protection, Faculty of Agriculture, Omar Al-Mukhtar University, P.O. 919 Al-Bayda - Libya.
M.G. El-Samman Department of Agricultural Botany, Ain Shams University, Arab Republic of Egypt.
Issa A. Abugharsa Department of Plant Protection, Faculty of Agriculture, Omar Al-Mukhtar University, P.O. 919 Al-Bayda - Libya.

DOI:

https://doi.org/10.54172/mjsc.v9i1.486

Keywords:

toxin , Alternaria solani , early blight disease , Tomato Plant, Al-Gabal Al-Akther, Libya

Abstract

This study was conducted in the faculty of Agriculture in the University of Omar Al-Mukhtar (GSPLAJ). The study aimed to isolate the toxins from different isolates of Alternaria solani and bio-estimation of these toxins. Seven isolates from the mention fungus was collected from different Locations of Al-gabal Al-Akhdar district included (Derna, Elbedia and El-Marg). Crystal of Alternaric acid was obtained in pure case from these isolates. The results indicated that there were significant differences between isolates in their capability to produce the toxin that isolated on TLC and there was a different in the quantity of the produced toxin, according to the used cultural
media, inoculation of tested tomatoes leaves with fungal spore gives the ideal symptoms while the tested toxins gives only discoloration of the tested leaves. The raw toxin and fungal filtrates cause decreases in the germination of tomato seeds and the length of the rootlettes indicated that the toxin is not from primary determinant group.

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