Browsing by Author "Serçe, Çiğdem Ulubaş"

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Antifungal Activity of Some Lactic Acid Bacteria Against Several Soilborne Fungal Pathogens Isolated from Strawberry Plants
(Türk Tarım - Gıda Bilim ve Teknoloji dergisi, 2018) Canpolat, Elif; Doğaner, Müzeyyen Müge; Derviş, Sibel; Ulubaş Serçe, Çiğdem; Serçe, Çiğdem Ulubaş
Developing as an alternative plant disease control method by using beneficial microorganisms and their metabolites has gained so much importance in recent years. In this study, the possibilities of using microorganisms which have potential antimicrobial effects on controlling soil-borne fungi at strawberry production were investigated. Effects of different lactic acid bacteria (LAB) strains on the development of several soil-borne fungi were studied in vitro and in vivo. LAB were screened for antifungal activity by using cell free supernatant against Fusarium sp., Rhizoctonia sp., Macrophomina sp., Botrytis sp., Phtopythium sp., Cylindrocarpon sp. and Pestalotiopsis sp. Cell free supernatant of LAB isolates showed promising antifungal activity. In vitro effective strains of LAB were tested in pot experiments to search their effects on disease development and plant growth. While the antifungal effects of all LAB strains tested in vitro experiments exhibited promising results, in vivo experiments revealed similar effects on different fungi genera.
Citation - WoS: 19
Citation - Scopus: 19
Phytopythium litorale: A novel killer pathogen of plane (Platanus orientalis) causing canker stain and root and collar rot
(Plant Disease, 2020) Derviş, Sibel; Türkölmez, Şahimerdan; Çiftçi, Osman; Özer, Göksel; Serçe, Çiğdem Ulubaş; Dikilitaş, Murat
Decline symptoms associated with lethal stem and branch canker stain along with root and collar rots were observed on 5- to 7-year-old roadside oriental plane trees (Platanus orientalis) in Diyarbakır, Turkey. Above-ground symptoms included leaf necrosis, leaf curling, extensive bluish or blackish staining of shoots, branches, stem bark, and wood surfaces, as well as stem cankers and exfoliation of branch bark scales. A general decline of the trees was distinctly visible from a distance. A Phytophthora/ Pythium-like oomycete species with globose to ovoid, often papillate and internally proliferating sporangia was consistently isolated from the fine and coarse roots and stained branch parts and shoots. The pathogen was identified as Phytopythium litorale based on several morphological features. Partial DNA sequences of three loci, including nuclear rDNA internal transcribed spacer (ITS) and the large ribosomal subunit (LSU), and mitochondrial cytochrome c oxidase subunit II (coxII) confirmed the morphological identification. All P. litorale isolates were homothallic, developing gametangia, ornamented oogonia with elongate to lobate antheridia. Pathogenicity of P. litorale was tested by inoculation on excised shoots and by root inoculation on seedlings. P. litorale produced large lesions and blights on shoots in just 5 days and killed 100% of the seedlings in a month. This paper presents the first confirmed report of P. litorale as an important pathogen on a plant species causing branch and stem cankers, and root and collar rot, in and on P. orientalis, resulting in a rapid decline of trees and suggesting a threat to plane.