Bitkisel ve Hayvansal Üretim Bölümü

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Characterization and pathogenicity of Pythium-like species associated with root and collar rot of kiwifruit in Turkey
(In Plant Disease, 2021) Derviş, Sibel; Özer, Göksel; Karaca, Gürsel; Erper, İsmail; Derviş, Sibel
During the period of June to October in 2018, a widespread decline was observed on kiwifruit vines in the vineyards located in Altınordu, Fatsa, and Perşembe districts of Ordu province. The symptoms were associated with reddish-brown rots expanding from the root to the collar with sparse off-color foliage. Based on the percentage of the total infected samples across 18 vineyards, the most common oomycete species were Globisporangium intermedium (37.1%), Phytopythium vexans (34.3%), G. sylvaticum (14.3%), G. heterothallicum (11.4%), and Pythium dissotocum (2.9%). The morphological identification of isolates was confirmed based on partial DNA sequences containing the nuclear rDNA internal transcribed spacer region (rDNA ITS) and the mitochondrial cytochrome c oxidase subunit II (coxII) gene. The optimum growth temperature and the optimum pH of 5 species ranged from 22.98 to 28.25°C and 5.67 to 8.51, respectively. Pathogenicity tests on the seedlings of kiwifruit cv. Hayward revealed significant differences in virulence among isolates. Phytopythium vexans and G. sylvaticum isolates caused severe root and collar rot resulting in seedling death, while G. heterothallicum and G. intermedium isolates had relatively lower virulence. All Globisporangium spp. and P. vexans isolates significantly decreased plant growth parameters (plant height, shoot and root dry weights and root length); however, P. dissotocum caused very mild symptoms and did not affect these parameters of growth. To our knowledge, this is the first study reporting G. sylvaticum, G. heterothallicum, and G. intermedium causing root and collar rot on kiwifruit not only in Turkey but also in the world.
First Report of Binucleate Rhizoctonia Ag-F Causing Stalk and Root Rot of Corn (Zea Mays) in Turkey
(American Phytopathological Society, 2019) Türkölmez, Ş.; Derviş, Sibel; Çiftçi, O.; Derviş, S.; Ulubaş Serçe, Ç.
First Report of Neoscytalidium Dimidiatum Causing Black Canker and Root Rot of Walnut in Turkey
(American Phytopathological Society, 2019) Dervis, S.; Derviş, Sibel; Türkölmez, S.; Çiftçi, O.; Ulubas Serçe, Ç.; Dikilitas, M.
First Report of Neoscytalidium Dimidiatum Causing Dieback, Shoot Blight, and Branch Canker of Willow Trees in Turkey
(American Phytopathological Society, 2019) Türkölmez, Ş.; Derviş, Sibel; Derviş, S.; Çiftçi, O.; Serçe, Ç.U.; Türkölmez, C.G.; Dikilitas, M.
First Report of Neoscytalidium Dimidiatum Causing Shoot and Needle Blight of Pines (Pinus Spp.) in Turkey
(American Phytopathological Society, 2019) Türkölmez, S.; Derviş, Sibel; Dervis, S.; Çiftçi, O.; Dikilitas, M.
New disease caused by Neoscytalidium dimidiatum devastates tomatoes (Solarium lycopersicum) in Turkey
(ELSEVIER SCI LTD, 2019) Derviş, Sibel; Dervis, Sibel; Ciftci, Osman; Serce, Cigdem Ulubas; Dikilitas, Murat
A novel disease of tomato (Solarium lycopersicum L.) was observed in the Southeast Anatolia Region of Turkey. Symptoms were blight of all aerial parts of the plant, including stems, branches, leaves, petioles, flowers and fruits, defoliation, root rot, inner stem necrosis, and plant death. The disease was found in 13.9% of surveyed fields, with an incidence varying from 3% to nearly 75% (average 21.2%) of the plants in symptomatic fields. The average severity of blight on stem in fields with the symptomatic plant surveyed was 1.4%. A Botryosphaeriaceae species, identified as Neoscytalidium dimidiatum (Penz.) Crous & Slippers using morphological and cultural features, was consistently isolated from symptomatic roots, inner stems, and blighted leaves, shoots, stems, fruits and flowers. The partial nucleotide sequence data for three gene loci, including nuclear rDNA internal transcribed spacer (ITS), large subunit (LSU) genes and the translation elongation factor 1-alpha (TEF-1 alpha), confirmed the morphological identification. Furthermore, sequence data of actin genes from N. dimidiatwn was, for the first time, deposited to the GenBank. Koch's postulates were fulfilled by testing the susceptibility of different tomato tissues (leaves, stems, inner stems and roots of tomato seedlings, and detached tomato fruits and flowers) to N. dimidiatum inoculation. To our knowledge, this is the first report of N. dimidiatum on tomato.

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