Production of Catharanthus roseus in vertical farming systems: dynamic analyses of plant morphological responses of nine cultivars to N-UV supplementation

M.S.C. Lourenço, J.E.C. Prada, E. Heuvelink, S.M.P. Carvalho*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Catharanthus roseus is an ornamental and medicinal plant that has been used as a source of natural alkaloids with anti-cancer properties, making it an added-value plant species with potential interest for vertical farming (VF) production. However, the adaptability and variability of this species to VF conditions has not been properly explored nor the impact of N-UV supplementation on C. roseus growth and development. The present study aimed to screen the growth capacity of different commercial cultivars under VF conditions and test the impact of N-UV light irradiation on their growth and development. To this end, nine C. roseus cultivars (‘Cora Burgundy’ (C-Burg), ‘Cora Deep Lavender’ (C-DL), ‘Cora Red’ (C-Red), ‘Cora XDR Polka dot’ (C-XDR-Polka), ‘Cora XDR Punch’ (C-XDR-Punch), ‘Cora XDR White’ (C-XDR-WHT), ‘Titan Polka Dot’ (T-Polka), ‘Sunstorm Apricot’ (S-APR) and ‘Sunstorm Deep Lilac’ (S-DL)) were grown for 35 days in climate chambers using two different light spectra: i) Control (red (660 nm) + blue (450 nm) in a ratio 4:1, with a total photosynthetic photon flux density of 150 µmol m-2 s-1 for 12 h); and ii) supplementary N-UV light (same as control treatment with additional 2 h N-UV (365 nm, 10 mW m-2)). Final plant height (cm) varied between 4.95 (S-APR) and 7.78 (C-XDR-Wht), whereas the shortest plants were ‘Sunstorm’ cultivars. N-UV treatment increased in 22% the final number of internodes in T-Polka, however it has decreased in overall 0.12 cm the Average Internode Length comparing with Control. T-Polka produced a higher number of buds/flowers under NUV comparing with both ‘Sunstorm’ cultivars and C-Red disregarding the light condition. C-DL needed half of the time to bloom comparing with ‘Sunstorm’ cultivars. In conclusion cultivar generated a greater variability on plant morpho-physiological responses while N-UV mainly had no significant effects.

Original languageEnglish
Pages (from-to)217-224
JournalActa Horticulturae
Volume1337
DOIs
Publication statusPublished - Apr 2022

Keywords

  • cultivar screening
  • LEDs
  • medicinal plants
  • N-UV radiation
  • periwinkle
  • plant factories
  • plant height

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