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- Title
Phytochrome (S): The Main Agent of Action of Low-Intensity He–Ne Laser Radiation on Seeds of Cultivated Plants: A Review.
- Authors
Dudareva, Lyubov
- Abstract
The review provides a detailed analysis of published data on the use of low-intensity laser radiation (LILR) in the red spectral region for pre-sowing treatment of seeds of cultivated plants. The advantages and disadvantages of irradiation methods are critically examined: types of sources, doses, characteristics of the seed material, including the dependence of seed germination on lighting in different plant species (photoblastism), the frequency of irradiation, and the possible effect of local heating of the seed. The results of the analysis (available in the relevant literature and our own) of He–Ne laser-induced changes in the composition and content of the key compounds for seed germination are summarised. Possible mechanisms of the stimulating effect of LILR on the quality of seeds and plants and seedlings derived from them are discussed. Evidence is provided for the involvement of the phytochrome system and the balance of phytohormones in the primary response of treated seeds to the action of laser light. This involvement manifests itself in irradiation-induced (wavelength 632.8 nm) reversion of phytochrome A and/or phytochrome B into the active form, which causes rapid changes in the balance of growth regulators (phytohormones) in favor of compounds that promote germination and successful development of the seedling.
- Subjects
CULTIVATED plants; LASER beams; PHYTOCHROMES; GROWTH regulators; GERMINATION
- Publication
Journal of Plant Growth Regulation, 2024, Vol 43, Issue 2, p382
- ISSN
0721-7595
- Publication type
Article
- DOI
10.1007/s00344-023-11118-5