Browsing by Author "Turkolmez, Sahimerdan"

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Neoscytalidium Dimidiatum as a Postharvest Pathogen Affecting Solanaceous Vegetables
(Wiley, 2025) Derviş, Sibel; Ozer, Goksel; Turkolmez, Sahimerdan; Turkkan, Muharrem; Dervis, Sibel; 16.01. Department of Organic Agriculture / Organik Tarım Bölümü; 16. School of Vocational Higher School of Kızıltepe/ Kızıltepe Meslek Yüksekokulu; 01. Mardin Artuklu University / Mardin Artuklu Üniversitesi
Neoscytalidium dimidiatum, a member of the Botryosphaeriaceae family, is an emerging global plant pathogen. Although recently reported on various hosts in T & uuml;rkiye, its impact on commercially available vegetables remained undocumented. This study provides the first report of N. dimidiatum causing postharvest decay in the eggplant (Solanum melongena L.), pepper (Capsicum annuum), potato (Solanum tuberosum), and tomato (Solanum lycopersicum) obtained from local Turkish markets in 2023. The pathogen was identified through morphological characterisation and molecular analysis targeting the internal transcribed spacer (ITS) region, translation elongation factor 1-alpha (tef1), and beta-tubulin (tub2) gene sequences. The pathogenicity of N. dimidiatum was confirmed through Koch's postulates at 28 degrees C, and its temperature-dependent effects were assessed on solanaceous vegetables. Disease progression, measured by the area under the disease progress curve (AUDPC), was strongly influenced by temperature. No disease was observed at 12 degrees C. At 18 degrees C, limited disease development occurred in the eggplant and potato. AUDPC values increased significantly at 25 degrees C, generally peaking at 30 degrees C, with some hosts showing similar levels of disease severity at 35 degrees C. These findings highlight the critical role of postharvest temperature control, particularly rapid cooling and cold storage, in minimising losses caused by N. dimidiatum. This is the first report of N. dimidiatum as a postharvest pathogen affecting the eggplant, pepper, tomato fruits, and potato tubers, and the first record of this pathogen on the eggplant and pepper globally, expanding its known host range and reinforcing its significance as an emerging threat to global agriculture.
Citation - WoS: 23
Citation - Scopus: 24
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; 16.01. Department of Organic Agriculture / Organik Tarım Bölümü; 16. School of Vocational Higher School of Kızıltepe/ Kızıltepe Meslek Yüksekokulu; 01. Mardin Artuklu University / Mardin Artuklu Üniversitesi
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.