UDC 635.521:632.93
https://doi.org/10.25630/PAV.2025.63.75.001
Glushenkova O.E., Pakina E.N., Kurdyumova Y.V., Ignatov A.N.
The quality of lettuce seedlings is one of the key factors determines the success of subsequent crop cultivation. In 2024 and 2025, we evaluated the impact of different microbial inoculants, including Pseudomonas fluorescens, Bacillus subtilis, and Streptomyces malachitospinus, as well as a complex of growth regulators based on indolic acids and amino acids, on the early development of iceberg lettuce plants under controlled conditions. We studied the separate and combined effects of these inoculants and the complex of organic acids when applied during sowing and during the phase of the first true leaf. After 15 days, we measured biometric parameters such as root length, leaf length, number of leaves, as well as susceptibility to heat stress. In addition, morphological features of the seedlings, general plant condition, and visible signs of adaptation to stress factors were also evaluated, providing a more comprehensive understanding of the physiological response of plants to the treatments. This made it possible to draw conclusions about changes in plant reaction and tolerance to adverse environmental conditions depending on the treatment variant. Our results showed that the combined use of the microbial inoculant with the complex of organic acids significantly increased the root and leaves length compared to the control group. The Bacillus subtilis strain showed the maximum reduction in seedling susceptibility to heat stress, with plant survival reaching 96%. The data obtained indicates the high efficiency of the combined use of the studied bacteria and a complex of chemical growth regulators in the development of lettuce seedlings. This resulted in a higher survival rate during transplantation and an overall improved quality.
Key words: lettuce, seedlings, microbial inoculants, indole acids, amino acids, Bacillus subtilis, Pseudomonas fluorescens, Streptomyces malachitospinus
Glushenkova O.E., postgraduate student. E-mail: glushenkova_oe@pfur.ru
Pakina E.N., D.Sci. (Agr.), Head of the Department, e-mail: pakina_en@pfur.ru
Kurdyumova Ya.V., Master’s Student. E-mail: 1132247851@pfur.ru
Ignatov A.N., D.Sci. (Biol.), professor, Department of Agrobiotechnology, Agrarian and Technological Institute, RUDN University named after Patrice Lumumba. E-mail: ignatov_an@pfur.ru
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PDF(Rus)
For citing: Effect of microbial inoculants and an indole–amino acid complex on the development of lettuce plants. O.E. Glushenkova, E.N. Pakina, Y.V. Kurdyumova, A.N. Ignatov. Potato and vegetables. 2025. No8. Pp. 31-35. https://doi.org/10.25630/PAV.2025.63.75.001 (In Russ.).
