<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The impact of light quality generated by light-emitting diodes (LEDs) on the adventitious root formation and cuttings’ quality of rose hip ‘Konstancin’ under controlled conditions in multilevel growth chamber without access to natural light and in the greenhouse was evaluated. In the growth chamber, the lighting was provided by a combination of red and blue LED arrays and white LED tubes, while in the greenhouse, red and blue LED lights were used as a supplement to natural light. The number of rooted cuttings under both growth conditions was not affected by the light conditions generated by LEDs. However, light quality showed significant effects on the biomass production and development of adventitious roots, with the most stimulating red light generated by LEDs. In the growth chamber, the root biomass of the cuttings illuminated with white LEDs supplemented with red LEDs was on average 2.2 times higher than of the cuttings illuminated with white LEDs only. A similar reaction was noted under greenhouse conditions. Supplementation of natural light with red LEDs resulted in 1.7 times increase of the fresh biomass of roots. Both in the growth chamber and in the greenhouse, illumination with red LEDs promoted axillary bud outgrowth. LED lamps can be used in the production of high-quality rose cuttings, both in greenhouses as a complement to natural light and in multilevel rooms as a sole-source lighting for plants.</p></abstract>

The impact of light quality generated by light-emitting diodes (LEDs) on the adventitious root formation and cuttings’ quality of rose hip ‘Konstancin’ under controlled conditions in multilevel growth chamber without access to natural light and in the greenhouse was evaluated. In the growth chamber, the lighting was provided by a combination of red and blue LED arrays and white LED tubes, while in the greenhouse, red and blue LED lights were used as a supplement to natural light. The number of rooted cuttings under both growth conditions was not affected by the light conditions generated by LEDs. However, light quality showed significant effects on the biomass production and development of adventitious roots, with the most stimulating red light generated by LEDs. In the growth chamber, the root biomass of the cuttings illuminated with white LEDs supplemented with red LEDs was on average 2.2 times higher than of the cuttings illuminated with white LEDs only. A similar reaction was noted under greenhouse conditions. Supplementation of natural light with red LEDs resulted in 1.7 times increase of the fresh biomass of roots. Both in the growth chamber and in the greenhouse, illumination with red LEDs promoted axillary bud outgrowth. LED lamps can be used in the production of high-quality rose cuttings, both in greenhouses as a complement to natural light and in multilevel rooms as a sole-source lighting for plants.

Vertical Production of ‘Konstancin’ Rose Cuttings in the Growth Chamber Under Led Light

Journal of Horticultural Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The impact of light quality generated by light-emitting diodes (LEDs) on the adventitious root formation and cuttings’ quality of rose hip ‘Konstancin’ under...

LED light treatment PPFD (μmol·m⁻²·s⁻¹)	Rooting (%)	Number of roots per cutting	Root length (mm)	Fresh weight of roots (mg)	Cuttings with new shoots (%)	Shoot length (mm)	Fresh weight of shoot (mg)
White 50 – control	83.3±3.6 a	3.3±0.41 a	50±0.7 a	79.3±17.1 a	26.7±3.6 a	15.7±3.7 a	274±22 a
White 100	93.3±2.4 a	3.9±0.57 a	51±3.4 a	89.6±15.7 a	43.3± 7.2 a	25.3±3.0 b	368±44 ab
White 50 + Red 50	89.7±0.8 a	3.2±0.48 a	48±4.7 a	183.0±27.9 b	66.7±3.6 b	23.2±2.6 b	486±21 b
White 50 + Blue 50	86.7±1.9 a	2.7±0.34 a	44±4.2 a	124.5±27.4 ab	39.2±6.6 a	22.2±2.8 b	354±25 ab

LED light treatment PPFD (μmol·m⁻²·s⁻¹)	Rooting (%)	Number of roots per cutting	Root length (mm)	Fresh weight of roots (mg)	Cuttings with new shoots (%)	Shoot length (mm)	Fresh weight of shoot (mg)
Natural – control	61.7±3.2 a	3.6±0.35 a	55±3.8 a	51.9±5.8 a	21.7±2.1 a	5.8±0.8 a	86±12 a
White 120	67.5±2.8 a	5.0±0.45 a	67±5.0 a	63.3±9.6 ab	38.3±6.2 a	7.4±1.1 a	120±13 a
Red 120	61.7±6.1 a	4.9±0.45 a	72±5.0 a	88.7±12.2 b	63.4±4.5 b	8.4±1.4 a	100±12 a
Blue 120	65.0±4.0 a	4.3±0.45 a	65±6.1 a	72.3±8.3 ab	30.0±5.3 a	5.6±0.7 a	118±22 a

Vertical Production of ‘Konstancin’ Rose Cuttings in the Growth Chamber Under Led Light

Article Category: Short communication

Published Online: Dec 31, 2020

Page range: 29 - 34

Received: May 01, 2020

Accepted: Sep 01, 2020

DOI: https://doi.org/10.2478/johr-2020-0020

Keywords
hip rose, light spectrum, root quality, vegetative propagation

© 2020 Bożena Matysiak, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Rooting and initial growth of shoots on two-node cuttings of Rosa ‘Konstancin’ in response to the quality of LED light and the intensity of irradiation in the growth chamber

Rooting and initial growth of shoots on two-node cuttings of Rosa ‘Konstancin’ in response to the quality of LED additional lighting in the greenhouse

Vertical Production of ‘Konstancin’ Rose Cuttings in the Growth Chamber Under Led Light

Article Category: Short communication

Published Online: Dec 31, 2020

Page range: 29 - 34

Received: May 01, 2020

Accepted: Sep 01, 2020

DOI: https://doi.org/10.2478/johr-2020-0020

Keywordship rose, light spectrum, root quality, vegetative propagation

© 2020 Bożena Matysiak, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Rooting and initial growth of shoots on two-node cuttings of Rosa ‘Konstancin’ in response to the quality of LED light and the intensity of irradiation in the growth chamber

Rooting and initial growth of shoots on two-node cuttings of Rosa ‘Konstancin’ in response to the quality of LED additional lighting in the greenhouse

Keywords
hip rose, light spectrum, root quality, vegetative propagation