Abstract Ascochyta blight (caused by Didymella rabiei ) is one of the most important diseases affecting chickpea production and productivity. The distribution, incidence severity disease, association agronomic practices environmental factors on intensity disease mainly remained undermined. Chickpea field surveys were conducted in two main growing regions central Ethiopia during 2020 2021 croppi...

The Didymellaceae was established in 2009 to accommodate Ascochyta, Didymella and Phoma, as well as several related phoma-like genera. The family contains numerous plant pathogenic, saprobic and endophytic species associated with a wide range of hosts. Ascochyta and Phoma are morphologically difficult to distinguish, and species from both genera have in the past been linked to Didymella sexual ...

Crude protein extracts from the chickpea (Cicer arietinum L .) pathogenic fungus Ascochyta rabiei catalyze the N A D PH dependent conversion of the pterocarpan phytoalexins medicarpin and maackiain to 1) 2'-hydroxyisoflavans, 2) 1 a-hydroxypterocarp-l,4-diene-3-one, and 3) 10,2'dihydroxyisoflav-8-ene-7-one derivatives. A pterocarpan: N A D PH oxidoreductase which cleaves the benzylphenyl ether ...

H. Ozkilinc, O. Frenkel, S. Abbo, R. Eshed, A. Sherman, D. Shtienberg*, R. Ophir and C. Can Department of Biology, University of Gaziantep, 27310, Turkey; The Levi Eshkol School of Agriculture, The Hebrew University of Jerusalem, Rehovot 76100; Genomics Department, The Volcani Center, Agricultural Research Organization, Bet-Dagan, 50250; and Department of Plant Pathology and Weed Research, the ...

The most important foliar diseases in legumes worldwide are ascochyta blights. Up to now, in the Ascochyta-legume pathosystem most studies focused on the identification of resistance genes in the host, while very little is known about the pathogenicity factors of the fungal pathogen. Moreover, available data were often obtained from fungi growing under artificial conditions. Therefore, in this ...

Ascochyta blight caused by Ascochyta rabiei (Pass.) Labrousse is a major biotic constraint in production of chickpea. In the present investigation, all chickpea genotypes [E100Y (m), Gaurav, Pb-7 and L550] induced 100% callus on standard medium with greenish colour and fragile structure. These calli were used for in vitro screening against pathogen, A. rabiei culture filtrate at 0, 5, 10, 15 an...

pathogenic diversity in didymella rabiei in ilam and kermanshah provinces was assessed with the objective of finding out about the existence of pathotypes. one hundred isolates from different farms of chickpea growing regions in these provinces were collected in 2007. isolates were arranged into ten different groups based upon their sampling regions. one isolate was chosen from anyone of the te...

Constant evolutionary pressure acting on pathogens refines their molecular strategies to attain successful pathogenesis. Recent studies have shown that pathogenicity mechanisms of necrotrophic fungi are far more intricate than earlier evaluated. However, only a few studies have explored necrotrophic fungal pathogens. Ascochyta rabiei is a necrotrophic fungus that causes devastating blight disea...

The antimycotic potential of Datura metel (syn. Datura alba Nees.) was investigated in vitro against Ascochyta rabiei, the cause of chickpea blight disease. The pathogen was exposed to various n-hexane concentrations (1, 2, 3 and 4% w/v) of shoot and root extracts of D. metel using poisoning food technique. All the employed concentrations of both root and shoot extracts significantly suppressed...

Cicer arietinum, Ascochyta rabiei, Elicitor. Isoflavones, Phytoalexins Upon slicing cotyledons of chickpea, Cicer arietinum L ., accumulate the pterocarpan phyto­ alexins medicarpin and maackiain. Treatment of this tissue with an elicitor from the phytopathogenic deuteromycete Ascochyta rabiei (Pass.) Lab. greatly enhances accumulation of the pterocarpans and of other isoflavones and flavonoids...