Abstract
We carried out an analysis of the influence of low-intensity He–Ne laser radiation on the dynamics of changes observed in the content of the phytohormones abscisic, jasmonic, salicylic, and indoleacetic acids in wheat calluses of Triticum aestivum L. using chromatography–mass spectrometry. He–Ne laser irradiation (λ = 632.8 nm) in its stimulant dose (3.5 J cm−2) was proved to cause a decrease in jasmonic and indoleacetic acid content and, simultaneously, a significant (2.5–3 times) increase in ‘stress’ abscisic and salicylic acids. The response of jasmonic acid to He–Cd laser irradiation (λ = 441 nm) was specific, which is probably due to the blue-light-induced biosynthesis of the acid. This article discusses a possible connection between substantial changes in growth regulator content within the plant tissue under the influence of low-intensity laser irradiation and the stress character of this type of radiation.
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