Bacteria to stimulate the growth and increase the yield of bread spring wheat in the conditions of the Trans-Ural steppe
DOI:
https://doi.org/10.28983/asj.y2022i2pp60-66Keywords:
Pseudomonas protegens DА1.2, chistalan, nanomet, wheat, phytohormones, droughtAbstract
The paper presents data from three years of field research in the conditions of the Trans-Ural steppe zone. The positive effect of treatment with a strain of bacteria Pseudomonas protegens DA1.2 together with herbicides of different chemical nature (chistalan and nanomet) in drought conditions is shown. Inoculation with bacteria led to an increase in wheat yield under combined stress due to the growth-stimulating effect of bacteria on plants and leveling the toxic effect of herbicides. Treatment with bacteria and herbicides contributed to the accumulation of raw plant mass and stimulating the growth of shoots, maintained high relative water content, and increased the concentration of chlorophyll in the leaves. The introduction of herbicides of different chemical nature had a different effect on the hormonal status of plants. In combination of bacterial treatment with the herbicide nanomet, an increase in the content of abscisic acid (ABA) and a decrease in the level of auxins (IAA) in wheat plant shoots were noted. And when treated with strain Pseudomonas protegens DA1.2 with chistalan, the concentration of ABА in the shoots decreased. The addition of bacteria to herbicides during processing led to an increase in the number of grains in the ear, the weight of grain per ear. The maximum increase in yield relative to the control was observed in variants of joint treatment with bacteria of strain Pseudomonas protegens DA 1.2 with chistalan or nanomet.
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