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    Molecular and pathogenic characterization of Fusarium oxysporum and Fusarium proliferatum causing basal root rot in garlic in Turkey
    (Springer, 2022) Dedecan, Olcay; Talapov, Talap; Demral, Meral; Sarpkaya, Kamil; Ceyhan, Derya Isler; Can, Canan
    Diseases caused by Fusarium species in garlic, which is among the products of economic importance, cause serious yield losses. While the isolation and characterization of Fusarium species has mostly been done from cloves and storage, the disease agent has been documented in very few seedling stages. In our study, eight isolates were obtained from specimens at the seedling stage, and species were defined according to morphological and molecular characterizations. Two isolates were identified as F. oxysporum, and the other six as F. proliferatum. As a result of cross pathogenicity of F. oxysporum isolates with onions, these isolates were defined as F. oxysporum f. sp. garlic. According to the data obtained from our study, these species that cause basal rot in garlic from Turkey were characterized for the first time using molecular techniques. In addition, this publication Fusarium oxysporum f.sp. garlic is the first report from Turkey.
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    Removal Efficacy of Toxic Metals in Leachate through Micro-Organisms Isolated from the Natural Environment
    (North Carolina State Univ Dept Wood & Paper Sci, 2023) Kocaman, Ayhan; Savas, Burak Feyyaz; Ceyhan, Derya Isler
    Landfill leachate is a serious contaminant for groundwater and surface water because of its potentially toxic metal content. In many countries, leachate is discharged into the natural environment without treatment because of the high disposal cost. However, this environmental problem can be solved by microorganisms, as they can adsorb the contaminants or convert them into end products, and this is cost-effective. This study focused on determining bacteria capable of efficiently removing toxic metals from leachates. Therefore, bacteria were isolated from nature that have a high adsorption and resistance capacity to a number of toxic metals. This potential was achieved by Enterobacter hormaechei, Priestia aryabhattai, and Mycobacterium sacrum, among others. Their efficiency in removing toxic metals compared to raw leachate was Cd (78%, 67%, 78%), Ni (64%, 57%, 56%), Pb (99%, 75%, 76%), Cr (41%, 46%,19%), Co (45%, 60%, 40%), and Cu (80%, 80%, 60%), respectively. According to the results, these bacterial strains proved to be very effective in the treatment of toxic metals from leachate. Therefore, they are good candidates for the treatment of wastewater by bioremedial methods.