Activity of East Siberian Trichoderma Isolates against Plant-pathogenic Microorganisms

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Abstract

The genus Trichoderma comprised important antagonists of pathogenic fungi and can be used in agriculture to combat various plant diseases. In the course of the present work, two micromycete strains were isolated from wood cuts in Eastern Siberia, which were identified by morphological and molecular genetic characteristics as Trichoderma atroviride and Trichoderma harzianum. These Trichoderma strains efficiently inhibited the development of the pathogenic fungi studied (by up to 80%). The data presented in the paper indicate that Trichoderma atroviride and Trichoderma harzianum may be promising for further study of the means of biocontrol of plant diseases.

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About the authors

V. Е. Kuznetsova

Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences

Author for correspondence.
Email: uchiha-viksya@mail.ru
Russian Federation, Irkutsk, 664033

E. A. Matveeva

Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences

Email: uchiha-viksya@mail.ru
Russian Federation, Irkutsk, 664033

L. A. Belovezhets

Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences

Email: uchiha-viksya@mail.ru
Russian Federation, Irkutsk, 664033

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2. Fig. 1. The growth rate of microorganisms on a dense nutrient medium (M ± ς): 1 ‒ Fusarium (orthoceras) oxysporum; 2 — Alternaria botrytis; 3 — Stemphylium botryosum; 4 — Phytophthora drechsleri; 5 — Trichoderma atroviride; 6 — Trichoderma harzianum.

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3. Fig. 2. Inhibition of the radial growth of the phytopathogen after 7 days of cultivation, %; (M ± ς). 1 — Fusarium (orthoceras) oxysporum; 2 — Alternaria botrytis; 3 — Stemphylium botryosum; 4 — Phytophthora drechsleri.

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4. 3. In vitro antagonism: row (a) on the right (Th) Trichoderma harzianum; row (b) on the right (Ta) Trichoderma atroviride, phytopathogens on the left (Fo) Fusarium (orthoceras) oxysporum, (Ab) Alternaria botrytis, (Sb) Stemphylium botryosum, (Pd) Phytophthora drechsleri (age cultures 7 days); row (b) (Pd) Phytophthora drechsleri and (Ta) Trichoderma atroviride. The age of crops is 14 days.

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