Effect of Light Intensity on the Morphogenesis of Stevia rebaudiana under In Vitro Conditions

A study of the effect of various light intensity (75, 135, 230, and 382 µmol/(m 2 s)) on the morphogenesis of Stevia rebaudiana (Bertoni) Bertoni in vitro was carried out using a unique LED light source Sun Box (wavelength range of 440–660 nm) developed at the Institute of Automation and Control Pro...

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Bibliographic Details
Published in:Russian journal of plant physiology 2019-07, Vol.66 (4), p.656-663
Main Authors: Nakonechnaya, O. V., Gafitskaya, I. V., Burkovskaya, E. V., Khrolenko, Yu. A., Grishchenko, O. V., Zhuravlev, Yu. N., Subbotin, E. P., Kulchin, Yu. N.
Format: Article
Language:English
Subjects:
Adaptation
Automation
Biomedical and Life Sciences
Cultivation
Diodes
Energy costs
Fluorescent lamps
Life Sciences
Light
Light emitting diodes
Light intensity
Light sources
Luminous intensity
Morphogenesis
Optimization
Plant Physiology
Plant Sciences
Plantlets
Propagation
Research Papers
Stevia rebaudiana
Sun
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Summary:A study of the effect of various light intensity (75, 135, 230, and 382 µmol/(m 2 s)) on the morphogenesis of Stevia rebaudiana (Bertoni) Bertoni in vitro was carried out using a unique LED light source Sun Box (wavelength range of 440–660 nm) developed at the Institute of Automation and Control Processes (Far East Branch, Russian Academy of Sciences). The light spectrum of the Sun Box was close to the solar spectrum. Luminescent light with an intensity of 49 µmol/(m 2 s) was used as a control. It was shown that the cultivation of plantlets using an LED source with an intensity of 75 and 230 µmol/(m 2 s) promoted the development of plantlets with a combination of morphological and mesostructural parameters important for microclonal reproduction and/or adaptation to the ground. Such plantlets accumulated the maximal weight of the aerial parts and roots, which was especially important for their subsequent transfer into open ground conditions. Plantlets cultivated at a given light intensity with a developed root system would pass the adaptation process faster and it, in turn, would reduce the percentage of plant mortality. The use of a composite LED light source with a certain intensity during in vitro cultivation of S. rebaudiana would allow optimization of the growing and propagation of plantlets and would reduce energy costs compared with the use of fluorescent lamps.
ISSN:1021-4437
1608-3407
DOI:10.1134/S1021443719040095