Effect of LED spectra (red : blue ratios) on morphological and physio-biochemical performance of pak choi (Brassica rapa var. chinensis (L.) Hanelt) grown under controlled environment multi-tier hydroponic production system
Copyright © 2025 Elsevier Masson SAS. All rights reserved.
| Publié dans: | Plant physiology and biochemistry : PPB. - 1991. - 226(2025) vom: 20. Mai, Seite 110054 |
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| Auteur principal: | |
| Autres auteurs: | , , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
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| Accès à la collection: | Plant physiology and biochemistry : PPB |
| Sujets: | Journal Article Antioxidant capacity Controlled environment Glucosinolate content Hydroponics Light treatments |
| Résumé: | Copyright © 2025 Elsevier Masson SAS. All rights reserved. The light quality has intricate effects on plant growth and developmental processes by aligning with chlorophyll's absorption peaks. In the present study, three LED-induced spectra, i.e. varying ratios of blue and red lights along with white light (control) were employed to note the morphological, physio-biochemical parameters and nitrogen metabolism enzyme activities in pak choi cv. Choko. The hydroponic system consisted of four-shelf hydroponic cultivation system, with each layer accommodating 72 plants per shelf and raised in PPFD of 200 ± 10 μmol m-2 s-1. The light treatment R2B1 (67: 33 %; red and blue ratio) led to the maximum plant height, biomass accumulation and leaf nitrite content. The high red light increased overall plant biomass partitioning to shoot (R2B1), while the higher ratio of blue light in leaf and root (R1B1 and R1B2 (33: 67 %) irrespective of observation intervals. Similarly, the leaf gas exchange parameters like Pn (1.91-fold), E (1.92-fold) and gs (1.46-fold) were found to increase under the R2B1 treatment. Similarly, nitrate metabolism enzyme activities, i.e. glutamate synthase (EC 1.4.7.1), glutamine synthetase (EC 6.3.1.2) and nitrate reductase (EC 1.7.1.1) activities were positively correlated with leaf nitrate content. The leaf glucosinolate fractions, i.e. NAP, 4 ME, RAA and GBC were observed higher. The aliphatic glucosinolates (4.22 μmol g-1 aliphatic) and antioxidant enzyme activities were highest in R2B1 and R1B2 treatments compared to white light. The higher ratio of red light, i.e. R2B1 significantly increased (50.91 %) yield compared to control, besides better leaf quality and higher stress adaptation under controlled environment growing conditions |
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| Description: | Date Revised 24.05.2025 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1873-2690 |
| DOI: | 10.1016/j.plaphy.2025.110054 |