Influence of LED spectral quality and natural growing conditions on flowering, yield, and fruit biochemical quality of okra (Abelmoschus esculentus (L.) Moench)
- 1Laboratoire d’Ingénierie Électronique, d’Électricité et des Systèmes Embarqués (LIEESE), Institut National Polytechnique Félix Houphouët Boigny (INP-HB)
- 2University of Toulouse, Toulouse INP, CNRS, Laboratoire Plasma et Conversion d’Énergie (LAPLACE)
- 3French National Center of Scientific Research (CNRS), Laboratoire Plasma et Conversion d’Énergie (LAPLACE), Unité Mixte de Recherche (UMR) 5213
Abstract
Introduction: Climate change poses significant challenges to open-field production of okra ( Abelmoschus esculentus (L.) Moench), a tropical vegetable crop of high nutritional and economic value. This study evaluated the effects of light-emitting diode (LED) spectral quality on reproductive development, fruit characteristics, yield, mineral composition, antioxidant activity, and total phenolic content of okra.
Methods: Plants were grown under blue (452 nm), red (659 nm), and combined red/blue (9:1; 657/447 nm) LED lighting at a photosynthetic photon flux density (PPFD) of 400 µmol m ⁻² s ⁻¹ under a 10-h photoperiod and compared with greenhouse and outdoor conditions.
Results: The red/blue 9:1 (RB 9:1) treatment promoted earlier flowering, with anthesis occurring approximately 37 days after sowing, and showed the highest numerical fruit length and fresh fruit mass, as well as the highest yield per plant and estimated yield per hectare, the latter being approximately twice that of the other growing conditions. RB 9:1 showed the highest numerical concentrations of calcium, potassium, sulfur, copper, and zinc, while outdoor plants showed the highest numerical concentrations of iron and strontium and red light the highest numerical rubidium concentration. RB 9:1 showed the highest numerical antioxidant activity, although it was not significantly different from red or blue light. Blue light showed the highest numerical total phenolic content, with no significant differences among treatments.
Discussion: Overall, RB 9:1 showed promising potential for earlier reproductive development and fruit production under the tested conditions.
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BibTeX
@article{yao2026influence,
title = {{Influence of LED spectral quality and natural growing conditions on flowering, yield, and fruit biochemical quality of okra (Abelmoschus esculentus (L.) Moench)}},
author = {Yao Hervé Yao and Banah Florent Degni and Laurent Canale and Arouna Khalil Fanny and Cissé Théodore Haba and Georges Zissis},
journal = {Frontiers in Plant Science},
year = {2026},
month = oct,
doi = {10.3389/fpls.2026.1947730},
url = {https://www.frontiersin.org/articles/10.3389/fpls.2026.1947730/full},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Influence of LED spectral quality and natural growing conditions on flowering, yield, and fruit biochemical quality of okra (Abelmoschus esculentus (L.) Moench)
AU - Yao Hervé Yao
AU - Banah Florent Degni
AU - Laurent Canale
AU - Arouna Khalil Fanny
AU - Cissé Théodore Haba
AU - Georges Zissis
PY - 2026
DA - 2026/10/29
JO - Frontiers in Plant Science
DO - 10.3389/fpls.2026.1947730
UR - https://www.frontiersin.org/articles/10.3389/fpls.2026.1947730/full
AB - Introduction: Climate change poses significant challenges to open-field production of okra ( Abelmoschus esculentus (L.) Moench), a tropical vegetable crop of high nutritional and economic value. This study evaluated the effects of light-emitting diode (LED) spectral quality on reproductive development, fruit characteristics, yield, mineral composition, antioxidant activity, and total phenolic content of okra. Methods: Plants were grown under blue (452 nm), red (659 nm), and combined red/blue (9:1; 657/447 nm) LED lighting at a photosynthetic photon flux density (PPFD) of 400 µmol m ⁻² s ⁻¹ under a 10-h photoperiod and compared with greenhouse and outdoor conditions. Results: The red/blue 9:1 (RB 9:1) treatment promoted earlier flowering, with anthesis occurring approximately 37 days after sowing, and showed the highest numerical fruit length and fresh fruit mass, as well as the highest yield per plant and estimated yield per hectare, the latter being approximately twice that of the other growing conditions. RB 9:1 showed the highest numerical concentrations of calcium, potassium, sulfur, copper, and zinc, while outdoor plants showed the highest numerical concentrations of iron and strontium and red light the highest numerical rubidium concentration. RB 9:1 showed the highest numerical antioxidant activity, although it was not significantly different from red or blue light. Blue light showed the highest numerical total phenolic content, with no significant differences among treatments. Discussion: Overall, RB 9:1 showed promising potential for earlier reproductive development and fruit production under the tested conditions.
SN - 1664-462X
ER -