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A role of fungi of the genera Trichoderma in adapting tomato plants to zinc impact

Abstract

There was studied the effect of fungi of the genera Trichoderma on the growth processes in tomatoes (Solanum lycopersicum) grown under conditions of various zinc concentrations in the environment. Zinc was found to have a significant effect on physiological and morphological parameters of tomatoes: it reduced the length of the above-ground part of plants and, in particular, of the root system; decreased accumulation of both fresh and dry biomass by plant; resulted in decreased assimilation areas of the leaves and degradation of the total content of green pigments, and changed the ratio of green and yellow pigment pools. A negative impact of this metal on the tomato plants could be observed at the earliest stages of plant development: increase in the zinc concentration in the environment resulted in reduction in germination energy and germination rate of tomato seeds. It has been shown that a degree of zinc impact on the growth processes depended on its concentration in the environment. The Trichoderma exerted positive influence on the productivity of plants: accumulation of fresh and dry biomass by plants took place; the assimilation areas of the leaves in the plants studied increased. The treatment of tomato seeds with micromycetes stimulated the synthesis of pigments. The fungi of the genera Trichoderma had a significant impact on the growth processes of plants grown under conditions of elevated zinc concentrations. Application of Trichoderma not only reduced the inhibiting action of zinc but also, in certain cases, increased the physiological and morphological parameters of the tomato plants studied. However, the micromycete effect on the growth processes was found to be ambiguous, and it depended on a zinc concentration in the environment, time of its impact, and an age of a plant itself.

About the Authors

T. I. Golovanova
Siberian Federal University
Russian Federation


A. F. Valiulina
Siberian Federal University
Russian Federation


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Review

For citations:


Golovanova T.I., Valiulina A.F. A role of fungi of the genera Trichoderma in adapting tomato plants to zinc impact. Siberian Herald of Agricultural Science. 2015;(6):57-64. (In Russ.)

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ISSN 0370-8799 (Print)
ISSN 2658-462X (Online)