Assessment of morphophysiological parameters and productivity of Hordeum vulgare under the action
of Pseudomonas sp. GEOT18 strain suspension 

Irina I. Rassokhina, Researcher of the laboratory of bioeconomics and sustainable development, Vologda Research Center of the Russian Academy of Sciences (56a Gorkogo street, Vologda, Russia), rasskhinairina@mail.ru
Oleg A. Marakaev, Candidate of biological sciences, associate professor, dean of the faculty of biology and ecology, P.G. Demidov Yaroslavl State University (14 Sovetskiy avenue, Yaroslavl, Russia), olemar@yandex.ru

Background. The realization of the genetic potential of crops in the Non Chernozem zone of Russia is limited due to changeable weather conditions. However, the use of microorganisms can accelerate the growth and development of plants and optimize their mineral nutrition. The purpose of the work is to evaluate the morphophysiological parameters and productivity of Hordeum vulgare L. under the action of Pseudomonas sp. GEOT18 strain suspension. Materials and methods. The study was carried out in the framework of a microplot experiment in the temperate climate of the Northern Hemisphere (Vologda Oblast). The objects of the study were two varieties of H. vulgare – Pamyati Chepeleva and Sonet. The suspension of the strain was used to treat the seeds (soaking before sowing) and the plants in the tillering phase (spraying of the phyllosphere). Results. It was revealed that the treatment with Pseudomonas sp. GEOT18 strain causes an increase in H. vulgare dry weight (up to 53 %) and assimilation surface area (up to 21 %). Also, the Sonet variety showed an increased content of photosynthetic pigments in the leaves of the plants of the experimental variety throughout the growing season. Increasing the values of growth parameters of H. vulgare, apparently, had an impact on the productivity of the experimentalvarieties, which is most evident in the Sonet variety (by 20 %). Conclusions. The effect of a suspension of a strain of Pseudomonas sp. GEOT18 led to an increase in the grain yield of H. vulgare variety Pamyati Chepeleva by 5 %, and variety Sonet by 20 %.

Hordeum vulgare, Pseudomonas, strain, growth, productivity, photosynthetic pigments

Rassokhina I.I., Marakaev O.A. Assessment of morphophysiological parameters and productivity of Hordeum vulgare under the action of Pseudomonas sp. GEOT18 strain suspension. Izvestiya vysshikh uchebnykh zavedeniy. Povolzhskiy region. Estestvennye nauki = University proceedings. Volga region. Natural sciences. 2023;(3):92–104. (In Russ.). doi: 10.21685/2307-9150-2023-3-8