Effect of wheat seed bacterization on the peroxidase activity under high temperature

The paper shows the possibility of using Aeromonas media and Pseudomonas extremorientalis to reduce the negative effects of elevated temperatures on wheat, which was evaluated through peroxidase activation.

Role of biological preparations in increasing yield of pea (Pisum sativum L.) under conditions of steppe Сrimea

The purpose of the research was to study the efficiency of the microbial preparations of polyfunctional action as an element of the pea growing technology under conditions of the steppe Crimea. During the period of the highest activity of nodule formation (flowering phase), pea plants form organs of photosynthetic and symbiotic apparatus. Thus, we did all the necessary observations and measurements. The mass of the above-ground part of the pea plants varied from 14.9 to 27.8 g and exceeded the control variant by 3.1-12.9 g or by 20.8-86.6%. The leaf surface of one plant was from 165.19 to 286.91 cm2. By the number of nodules, the variant, in which seeds were treated with the pure strain 261b (29 pcs.), stood out from the other ones. The process of photosynthesis is functionally associated with nitrogen fixation. So, an increase in these indicators affects plant productivity. The productivity of the plant in the variants with bacterization exceeded the control one by 0.3-1.1 g or 16.7-61.1%. The highest productivity (2.9 g) was observed in the variant with complex preparations – rhizobium technological complex (RTC) 10 seed bacterization. Thus, we found that seeds bacterization can increase the productivity of pea plants by 0.3-1.1 g or 16.7-61.1%; yield – by 0.01-0.17 t/ha or 0.5-9.0%; improve the profitability of pea cultivation by 14.8-29.8%. In 2019, the experiment with the cyano-rhizobium complex bacterization was the most effective. In this case, the yield reached 2.07 t/ha; the yield increase was 0.17 t/ha (LSD05 = 0.17 t/ha).

Search of a new donors of resistance to stem rust in lines of common wheat with genetic material of Agilops speltoides

Scientific work is aimed at developing biotechnology for growing biologically safe products of Linum usitatissimum L. This research presents the study of the structure of microbocenosis in the rhizosphere of Linum usitatissimum L. under the influence of seed bacterization with new multifunctional cyanobacteria forms under conditions of southern Chernozem. In 2017, pre-sowing seed bacterization with strain Nostoc linckia 144 increased the number of aminotrophs by 1.4 times at the beginning of plant vegetation; in 2018 – by 3.3 times during their final stages of maturity. The number of micromycetes was tripled to the end of flax vegetation compared to control. In 2017, bacterization of seeds with a homogenate based on the strain Nostoc linckia 144 contributed to a 1.4-fold increase in the number of cellulose-decomposing microorganisms by the closing stages of the vegetation period.

Influence of seed bacterization on the structure of microbocenosis of the southern Chernozem rhizosphere when growing Linum usitatissimum L.

Scientific work is aimed at developing biotechnology for growing biologically safe products of Linum usitatissimum L. This research presents the study of the structure of microbocenosis in the rhizosphere of Linum usitatissimum L. under the influence of seed bacterization with new multifunctional cyanobacteria forms under conditions of southern Chernozem. In 2017, pre-sowing seed bacterization with strain Nostoc linckia 144 increased the number of aminotrophs by 1.4 times at the beginning of plant vegetation; in 2018 – by 3.3 times during their final stages of maturity. The number of micromycetes was tripled to the end of flax vegetation compared to control. In 2017, bacterization of seeds with a homogenate based on the strain Nostoc linckia 144 contributed to a 1.4-fold increase in the number of cellulose-decomposing microorganisms by the closing stages of the vegetation period.

Tomato Growth Promotion Induced by Stress Tolerant Phosphate Solubilizing Pseudomonas simiae in Arid trans-Himalaya

<p><em>Pseudomonas simiae</em> isolated from Seabuckthorn rhizosphere solubilized insoluble phosphate at 4-40ºC, pH 4-12 and in presence of 1-5% salt concentration. The optimum condition was observed at 28ºC, pH 6 and devoid of any salt stress. Ca₃(PO₄)₂ was solubilized to a great extent than FePO₄ and AlPO₄. The isolate possess plant growth promoting attributes such as IAA (32 mg l^-1), siderophore (78%) and HCN (0.1 OD at A₆₂₅) production. Seed bacterization resulted in 30% and 51% enhanced shoot and root length, respectively in tomato seedling. Pot experiments revealed enhanced plant growth in <em>P. simiae</em> treated plants in both green shade net and open field conditions. Fruit yield was 9.8% and 19.8% higher over control in open and shade net condition, respectively. <strong></strong></p>