<abstract xmlns="http://www.w3.org/1999/xhtml">The southern African geophyte <italic>Lachenalia</italic> with an enormous number of species and cultivars is nowadays a commercially important plant material. There is a need for research on the optimization of growing conditions to obtain a satisfactory visual quality of potted plants, which may boost its production on the international ornamental market. Our research can be considered as an innovative study on supplemental irradiation with various light spectra in relation to flower quality of <italic>Lachenalia</italic> spp. The main objective was to examine the usefulness of LED lighting in extending the length of the natural day to a 16/8 h photoperiod in order to control the development of <italic>Lachenalia</italic> ‘Rupert’ inflorescence during greenhouse cultivation in Central-European winter time. Three light treatments were applied with red (660 nm) and blue (440 nm) light in different ratios: 100% red (100/0), 90% red mixed with 10% blue (90/10) and 80% red with 20% blue (80/20). The PPFD at the plant leaf level was approx. 150 µmol m−2 s−1. The most favourable spectrum, 90/10, induced the longest inflorescences characterized by the highest stem diameter with simultaneously the highest number of florets. Additionally, blue light increased the anthocyanin content in the corolla by about 35%, compared with plants exposed to 100% red light and non-irradiated ones (control plants). This first study on the wavelength ratios is aimed to increase the production quality of <italic>Lachenalia</italic> and indicates the need for continuation.</abstract>

The southern African geophyte Lachenalia with an enormous number of species and cultivars is nowadays a commercially important plant material. There is a need for research on the optimization of growing conditions to obtain a satisfactory visual quality of potted plants, which may boost its production on the international ornamental market. Our research can be considered as an innovative study on supplemental irradiation with various light spectra in relation to flower quality of Lachenalia spp. The main objective was to examine the usefulness of LED lighting in extending the length of the natural day to a 16/8 h photoperiod in order to control the development of Lachenalia ‘Rupert’ inflorescence during greenhouse cultivation in Central-European winter time. Three light treatments were applied with red (660 nm) and blue (440 nm) light in different ratios: 100% red (100/0), 90% red mixed with 10% blue (90/10) and 80% red with 20% blue (80/20). The PPFD at the plant leaf level was approx. 150 µmol m−2 s−1. The most favourable spectrum, 90/10, induced the longest inflorescences characterized by the highest stem diameter with simultaneously the highest number of florets. Additionally, blue light increased the anthocyanin content in the corolla by about 35%, compared with plants exposed to 100% red light and non-irradiated ones (control plants). This first study on the wavelength ratios is aimed to increase the production quality of Lachenalia and indicates the need for continuation.

High ratio of red-to-blue LED light improves the quality of <italic>Lachenalia</italic> ‘Rupert’ inflorescence

Institute of Plant Biology and Biotechnology

Folia Horticulturae

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

High ratio of red-to-blue LED light improves the quality of  ‘Rupert’ inflorescence

The southern African geophyte Lachenalia with an enormous number of species and cultivars is nowadays a commercially important plant material. There is a need...

High ratio of red-to-blue LED light improves the quality of Lachenalia ‘Rupert’ inflorescence

Publié en ligne: 30 juin 2019

Pages: 93 - 100

Reçu: 12 déc. 2018

Accepté: 24 janv. 2019

DOI: https://doi.org/10.2478/fhort-2019-0006

Mots clés
anthocyanins, dry matter, florets, growth of inflorescence

© 2019 Renata Wojciechowska et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

High ratio of red-to-blue LED light improves the quality of Lachenalia ‘Rupert’ inflorescence

Publié en ligne: 30 juin 2019

Pages: 93 - 100

Reçu: 12 déc. 2018

Accepté: 24 janv. 2019

DOI: https://doi.org/10.2478/fhort-2019-0006

Mots clésanthocyanins, dry matter, florets, growth of inflorescence

© 2019 Renata Wojciechowska et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
anthocyanins, dry matter, florets, growth of inflorescence