M. I. Yakovleva, G. G. Terekhov
Botanical Garden of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russian Federation
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Volume 25 No. 6
Date of paper submission: 17.06.2024, date of review: 19.02.2025, date of acceptance: 02.04.2025.
Published: 06/30/2025
Abstract. One of the most common are diseases of needles, caused by fungi of the genus Lophodermium. Lophodermium needle cast causes significant damage to pine seedlings in nurseries. However, the biochemical aspects of Scots pine resistance to fungal infections remain insufficiently studied. Among protective chemicals, phenolic compounds play an important role in plant resistance, including to fungal pathogens. In this regard, the purpose of the research was to study the possible influence of a weak degree of diseases by Lophodermium needle cast on the composition and content of phenolic compounds in pine needles. Methods. The composition and content of phenolic compounds were studied by high-performance liquid chromatography. Scientific novelty. Such studies have not previously been carried out in the Ural region. Results. More than 100 phenolic compounds were identified in samples of needles from two-year-old pine seedlings, both with and without signs of disease. No differences in the composition of phenolic compounds were found between the affected and control seedlings, only their content changed. Thus, in the needles of affected seedlings, the content of phenolic compounds increased in 40.2 %, decreased in 34.2 %, and remained virtually unchanged in 25.6 % compared to the control. An increase in the content of individual phenolic compounds in the affected needles, especially isorhamnetin, kaempferol and benzoic acid, was found compared to the control. This indicates the manifestation of a protective reaction in pine seedlings to a weak attack by the common Schutte at the biochemical level.
Keywords: Pinus sylvestris L., Lophodermium needle cast, plant resistance, phenolic compounds, high-performance liquid chromatography
Acknowledgements. We express our gratitude to Aleksey Anatolyevich Lyubimov, director of the Sarafanovskiy plant nursery (Artemovskiy district, Sverdlovsk region) for his assistance in the research. This work was carried out within the framework of the state assignment of the Botanical Garden of the Ural Branch of the Russian Academy of Sciences (№ 123112700125-1).
For citation: Yakovleva M. I., Terekhov G. G. Composition and content of phenolic compounds in the needles of Scots pine (Pinus sylvestris L.) with mild fungal disease. Agrarian Bulletin of the Urals. 2025; 25 (06): 937‒946. https://doi.org/10.32417/1997-4868-2025-25-06-937-946 (In Russ.)
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