Photons from NIR LEDs can delay flowering in short-day soybean and Cannabis: Implications for phytochrome activity.
Journal
PloS one
ISSN: 1932-6203
Titre abrégé: PLoS One
Pays: United States
ID NLM: 101285081
Informations de publication
Date de publication:
2021
2021
Historique:
received:
05
04
2021
accepted:
12
07
2021
entrez:
27
7
2021
pubmed:
28
7
2021
medline:
10
11
2021
Statut:
epublish
Résumé
Photons during the dark period delay flowering in short-day plants (SDP). Red photons applied at night convert phytochromes to the active far-red absorbing form (Pfr), leading to inhibition of flowering. Far-red photons (greater than 700 nm) re-induce flowering when applied after a pulse of red photons during the dark period. However, far-red photons at sufficiently high intensity and duration delay flowering in sensitive species. Mechanistically, this response occurs because phytochrome-red (Pr) absorbance is not zero beyond 700 nm. We applied nighttime photons from near infrared (NIR) LEDs (peak 850 nm) over a 12 h dark period. Flowering was delayed in Glycine max and Cannabis sativa (two photosensitive species) by 3 and 12 days, respectively, as the flux of photons from NIR LEDs was increased up to 83 and 116 μmol m-2 s-1. This suggests that long wavelength photons from NIR LEDs can activate phytochromes (convert Pr to Pfr) and thus alter plant development.
Identifiants
pubmed: 34314454
doi: 10.1371/journal.pone.0255232
pii: PONE-D-21-11197
pmc: PMC8315492
doi:
Substances chimiques
Phytochrome
11121-56-5
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e0255232Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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