Effects of LEDs on chlorophyll fluorescence and secondary metabolites in Phalaenopsis
Research output: Contribution to journal › Conference article › Research › peer-review
Light emitting diodes (LEDs) are solid-state semiconductor devices that have been integrated in current greenhouse systems the last decades as they provide the opportunity to control light spectrum. Commercial production of potted orchids under LEDs has increased throughout the world the past decades with Phalaenopsis being one of the most valuable potted crops. The experiment took place from January to April 2013 using plantlets of Phalaenopsis 'Vivien' and 'Purple star'. Plants were grown under a purpose-built LED array from Philips yielding approximately 200 μmol/m2s at plant height for 16 h per day. The temperature in the greenhouse compartments was set to 24/18°C day/night, respectively. The three light treatments were (1) 40% Blue 60% Red, (2) 100% Red, and (3) 100% White (Control). The plants were harvested before flowering and plant growth was recorded at the end of the experiment. Chlorophyll fluorescence was also recorded with PAM-2001. Leaf area and total fresh weight were highest in the 40%B/60%R for Phalaenopsis 'Vivien', while 100%R demonstrated the highest leaf area and fresh weight for Phalaenopsis 'Purple star'. Chlorophyll fluorescence for the same treatments was a little higher when compared to the control. Quantitation of secondary metabolites was performed by HPLC. The analysis showed that the treatments with additional blue light had the highest amount of flavonoids and carotenoids.
Original language | English |
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Journal | Acta Horticulturae |
Volume | 1078 |
Pages (from-to) | 87-92 |
Number of pages | 6 |
ISSN | 0567-7572 |
DOIs | |
Publication status | Published - 2015 |
Event | II International Orchid Symposium - Bangkok, Thailand Duration: 19 Feb 2014 → 21 Feb 2014 Conference number: 2 |
Conference
Conference | II International Orchid Symposium |
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Number | 2 |
Country | Thailand |
City | Bangkok |
Period | 19/02/2014 → 21/02/2014 |
- Carotenoids, Flavonoids, Light emitting diodes, Orchids
Research areas
ID: 157280744