INFLUENCE OF TRICHODERMA ON BIOPHYSICAL PARAMETERS OF TOMATO PLANTS
https://doi.org/10.26898/0370-8799-2017-6-10
Abstract
There was studied an effect of pre-sowing treatment of tomato (Solanum lycopersicum) seeds with the microscopic fungi to neutralize the negative influence of heavy metals on the growth and development of tomato plants. The plants of early-ripening, high-yielding tomato cultivar Lakomka of 55–60 cm high were the object of the study. The effect of Trichoderma asperellum strain MG-97 on biophysical parameters of tomato plants grown on media with different zinc concentrations was investigated. The experiment was conducted for 60 days at the air temperature of 25±2oC and in the natural lighting. The luminous intensity at the level of seedlings was 300 µmol photons /m2/s; the relative humidity was 75±3oC. The plants were grown on tap water, and on solutions with Zn concentrations of 1×10-5 mol/l and 5×10-5 mol/l. The activity of the photosynthetic apparatus of assimilating tissues was assessed using fluorescence induction rates with PAM (Pulse-Amplitude-Modulation)-fluorometer. The research has shown that zinc inhibited the quantum yield of photosynthesis and electron transport rate; with that, the critical zinc concentration was found to be 5×10-5 mol/l. Introducing T. asperellum removed the inhibiting effect and increased physio-morphological and biophysical parameters of the plants. A positive effect of T. asperellum has been observed at the early stages of the plant life cycle: on the 25th day, the micromycetes increased the electron transport rate by 40 percent in the tap water treatment, by 50 in the 1×10-5 mol/l zinc concentration treatment, and by 70 percent in the 5×10-5 mol/l zinc concentration treatment. Pre-sowing tomato seed treatment with the microscopic fungi has reduced the inhibiting action of zinc on the growth and development of the plants; this positive effect, however, has depended on the age of a plant, and on the period of impact of heavy metals.
About the Authors
A. F. Valiulina
Siberian Federal University
Russian Federation
Russian Federation
Lecturer.
79, Svobodny Ave, Krasnoyarsk, 660041T. I. Golovanova
Siberian Federal University
Russian Federation
Russian Federation
Doctor of Science in Biology, Professor.
79, Svobodny Ave, Krasnoyarsk, 660041A. V. Ivanova
Siberian Federal University
Russian Federation
Russian Federation
Senior Lecturer.
79, Svobodny Ave, Krasnoyarsk, 660041References
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For citations:
Valiulina A.F., Golovanova T.I., Ivanova A.V. INFLUENCE OF TRICHODERMA ON BIOPHYSICAL PARAMETERS OF TOMATO PLANTS. Siberian Herald of Agricultural Science. 2017;47(6):73-79. (In Russ.) https://doi.org/10.26898/0370-8799-2017-6-10
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