Antioxidant enzymes activity in grain sorghum plants under the action of herbicide, a plant growth regulator and a biopreparation
DOI:
https://doi.org/10.33730/2310-4678.4.2020.226655Keywords:
antioxidant enzymes, grain sorghum, plant growth regulator, herbicide, biopreparateAbstract
Herbicides, being substances with a high physiological activity, can affect not only weeds but also cultural plants. At the same time, there are many evidences that usage of plant growth regulators and pre-sowing seeds treatment by biological preparations can reduce the potential harmful impact of herbicides. Antioxidant systems are one of the first plant systems which react to the permeation of exogenous physiologically active substances. Therefore, one of the effective ways to estimate the influence of different preparations on plants condition is estimation of the antioxidant enzymes activity, particularly — catalase, peroxidase and polyphenoloxidase. To estimate enzymes activity in leaves of grain sorghum, a field experiment has been laid. It was conducted in crop rotation of the biology department of Uman national university of horticulture during 2019–2020. In the experiments were used: grain sorghum (Sorghum bicolor (L.) Moench) of the Milo W hybrid, herbicide Cytadel 25 OD in rates of 0,6; 0,8 and 1,0 l/ha, plant growth regulator Endofit L1 (30 ml/ha) and biopreparation Bioarsenal (800 g/100 kg). Enzymes activity was estimated in phases of tillering and throwing panicles. It was established that the enzymes activity of grain sorghum depended on the herbicide rate and raised simultaneously with its increasement. However, application of the herbicide in conjunction with the plant growth regulator Endofit L1 caused more significant increasement of the investigated enzymes compared to the variants where only herbicide was applied. The similar effect established in variants where the herbicide was applied on the background of pre-sowing seeds treatment by the biopreparation Bioarsenal. The highest activity of the antioxidant enzymes established in the variants where the herbicide Citadel 25 OD in rates of 0,6; 0,8 and 1,0 l/ha was applied in conjunction with the plant growth regulator Endofit L1 on the background of pre-sowing seeds treatment by the biopreparation Bioarsenal. It indicates increasement of the plant’s antioxidant status in case of using this combination of preparates.
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