Abstract
This article submits results of laboratory and field experiments on the effect of an auxin-producing bacterial strain Pseudomonas sp. DA1.2 in comparison with Pseudomonas koreensis IB-4 on wheat plants in conjunction with the “Chistalan” herbicide treatment. Our work shows the positive effect of bacterial treatments on plant growth, the relative water content in leaves and the role of bacteria in the redistribution of ABA and IAA in wheat shoots under conditions of herbicidal stress. Application of Pseudomonas sp. DA1.2 together with the herbicide in the field of the steppe zone led to an increase in yield by 20% relative to the control variant. This bacterial strain helps to overcome herbicidal stress and is a promising agent for improving the technology of using synthetic auxins herbicides.
Highlights
Herbicides in controlling the weeds is an integral part of the modern agricultural system
Monocotyledonous plants are insensitive to the action of 2,4-D synthetic auxin herbicides, their use before the tillering stage can inhibit the wheat growth [2]
It is generally thought that action of herbicides of the class of synthetic auxins on the sensitive plants is due to excessive accumulation of auxins in plants and a violation of their distribution between organs, thereby inhibiting plant growth [9]
Summary
Herbicides in controlling the weeds is an integral part of the modern agricultural system. Herbicides use leads to environmental pollution, and causes stressful effects on cultivated plants, leading to their yield decrease [1]. I.e. their ability to inhibit growth of certain plant species and not affect other species, provides the possibility of their use in crop production. It is generally thought that 2,4-dichlorophenoxyacetic acid (2,4-D), one of the most famous herbicides that was first discovered and widely used, inhibits the growth of dicotyledonous weeds and does not affect the growth of monocotyledonous plants. This principle underlies in the use of 2,4-D in cereal crops (primarily wheat). A generalization of the results of long-term tests of 2,4-D herbicide revealed a considerable number of cases of the negative effect of this herbicide on wheat growth [2]
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