Browsing by Author "Alptekin, Y."

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The Effectiveness of Arbuscular Mycorrhizal Fungi and Salicylic Acid Against Verticillium Dahliae Infecting Pepper (Capsicumannuum L.)
(Aloki Applied Ecological Research and Forensic inst Ltd, 2021) Coskun, F.; Demir, S.; Alptekin, Y.
This study was carried out to determine the effects of arbuscular mycorrhizal fungi (AMF), and salicylic acid (SA) on plant growth parameters and severity of wilt disease caused by Verticillium dahliae Kleb. in pepper. Effects of two different AMFs (Commercial AMF and Glomus intraradices) and two different SA doses (0.5 and 1 mM) were compared with untreated control plants after ten weeks. Both AMF species caused 62.08% and 69.07% root colonization, and the mycorrhizal dependency ratio changed from 9.08% to 59.37% in pepper plants. Commercial AMF caused a significant increase in morphological growth parameters, root colonization, mycorrhizal dependency rates and suppression of the disease severity. SA (1 mM) resulted in improved morphological growth parameters and suppression of the severity of the disease. Besides, SA and AMF applications were found to suppress the severity of Verticillium wilt disease by 21.8% and 56% in pepper plants, respectively. Thus, the applications of SA and AMF had positive contributions to the pepper plant's morphological development.
Reaction of Different Pepper (Capsicum Annuum L.) Cultivars To Isolates of Verticillium Dahliae Kleb. From Various Hosts
(Centenary University, 2021) Coşkun, F.; Alptekin, Y.; Demir, S.
Although Verticillium dahliae is one of the limiting factors in pepper (Capsicum annuum L.) has no effective control measures, the most effective method is planting resistant cultivars. This study was carried out under controlled climatic conditions to determine the response of some economically important pepper cultivars grown in Turkey against some isolates of V. dahliae. Bafra F1, Ergenekon F1 hybrid cultivars and Sena, Sera Demre 8, Doru 16 registered domestic pepper cultivars were used in this study. V. dahliae isolates (Bisak 16, Kahramanmaraş, Karpuz-2, Karpuz-4, Kayseri) obtained from different regions and hosts and diagnosed were used as a source of inoculums. The disease severity on inoculated plants in pots were calculated according to severity of the wilting (0-5 scale) and browning of stem cut (0-3 scale). Significant differences were observed between pepper cultivars in terms of susceptibility to V. dahliae isolates. According to the study results, when the leaf symptoms were evaluated, varieties resistant to wilt disease were Ergenekon F1 and Bafra F1, while Sera Demre-8 was determined as a susceptible variety. According to the browning symptoms of stem cut, while the resistant variety was Ergenekon F1, Sena was determined as the sensitive variety. © 2021, Centenary University. All rights reserved.