Application of Pyrazole Derivatives As New Substitutes of Auxin IAA To Regulate Morphometric and Biochemical Parameters of Wheat (Triticum Aestivum L.) Seedlings

Shtompel O.I,Victoria Anatolyivna Tsygankova,Kopich V.M,Andrusevich Ya.V,Vydzhak R.M,Panchyshyn S.Ya,Brovarets V.S

doi:10.24297/jaa.v10i0.8341

Abstract

The regulating activity of new synthetic low molecular weight heterocyclic compounds, pyrazole derivatives on morphometric, and biochemical parameters of wheat (Triticum aestivum L.) seedlings was studied. The synthetic compounds used at the concentration 10-8M revealed auxin-like stimulating effect on morphometric parameters of 6th-week-old wheat seedlings, which were increased on average: to 31 - 54 % – for total number of roots, to 39 – 104 % – for full length of sources, to 53 - 66 % – for length of the longest root as compared with similar parameters of the wheat seedlings grown in the distilled water (control) or water solution of auxin IAA (1H-Indol-3-ylacetic acid). The synthetic compounds used at the concentration 10-8M revealed cytokinin-like stimulating effect on biochemical parameters of 6th-week-old wheat seedlings. The content of photosynthetic pigments in the leaves of the wheat seedlings grown in the water solution of the pyrazole derivatives used at the concentration 10-8M increased on average: to 15-34 % – for content of chlorophyll a, to 10-61 % – for content of chlorophyll b, to 16–34 % – for content of chlorophylls a+b, to 14–28 % – for content of carotenoids, as compared with similar indices of the wheat seedlings grown in the distilled water (control) or water solution of auxin IAA. The practical application of pyrazole derivatives to regulate morphometric and biochemical parameters of wheat seedlings was proposed.

Highlights

IntroductionA new promising strategy for plant growing is developing of environmentally friendly plant hormones and plant growth regulators [1 – 17], natural bio stimulants or biofertilizers [18 – 23] that are capable of accelerating the growth and development of plants, reducing the phytotoxicity of chemical agents, and enhancing the plant immune response to abiotic and biotic stresses [1, 24 – 27]
Today, a new promising strategy for plant growing is developing of environmentally friendly plant hormones and plant growth regulators [1 – 17], natural bio stimulants or biofertilizers [18 – 23] that are capable of accelerating the growth and development of plants, reducing the phytotoxicity of chemical agents, and enhancing the plant immune response to abiotic and biotic stresses [1, 24 – 27].In this regard, the elaboration of new effective ecologically safe plant growth regulators on the base of synthetic low molecular weight heterocyclic compounds is a very strategic approach
The content of chlorophyll a, chlorophyll b and carotenoids was determined in the leaves of the 6th-week-old wheat (Triticum aestivum L.) seedlings cultivar Antonivka grown either in the distilled water, or in the water solution of synthetic low molecular weight heterocyclic compounds (LMWHC), pyrazole derivatives used at the concentration 10-8M, or in the water solution of phytohormone auxin indole-3-acetic acid (IAA) used at the same concentration 10-8M

Summary

Introduction

A new promising strategy for plant growing is developing of environmentally friendly plant hormones and plant growth regulators [1 – 17], natural bio stimulants or biofertilizers [18 – 23] that are capable of accelerating the growth and development of plants, reducing the phytotoxicity of chemical agents, and enhancing the plant immune response to abiotic and biotic stresses [1, 24 – 27]. In this regard, the elaboration of new effective ecologically safe plant growth regulators on the base of synthetic low molecular weight heterocyclic compounds is a very strategic approach. The plant growth regulators and fertilizers are used to accelerate the growth of wheat plant during the vegetative stage and increase crop yields [52 - 54]

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Conclusion