title: Infrared light-emitting diode radiation causes gravitropic and morphological effects in dark-grown oat seedlings.
abstract: Oat (Avena sativa cv Seger) seedlings were irradiated with IR light-emitting diode (LED) radiation passed through a visible-light-blocking filter. Infrared LED irradiated seedlings exhibited differences in growth and gravitropic response when compared to seedlings grown in darkness at the same temperature. Thus, the oat seedlings in this study were able to detect IR LED radiation. These findings call into question the use of IR LED as a safe-light for some photosensitive plant response experiments. These findings also expand the defined range of wavelengths involved in radiation-gravity (light-gravity) interactions to include wavelengths in the IR region of the spectrum.
authors.affiliation: Dynamac Corporation, Kennedy Space Center, FL, USA.
authors.forename: C F
authors.initials: CF
authors.lastname: Johnson
authors.forename: C S
authors.initials: CS
authors.lastname: Brown
authors.forename: R M
authors.initials: RM
authors.lastname: Wheeler
authors.forename: J C
authors.initials: JC
authors.lastname: Sager
authors.forename: D K
authors.initials: DK
authors.lastname: Chapman
authors.forename: G F
authors.initials: GF
authors.lastname: Deitzer
mesh_terms: D018554:Avena / Q000254:growth & development* / Q000502:physiology / Q000528:radiation effects*; D003624:Darkness; D006112:Gravitation; D018522:Gravitropism / Q000502:physiology / Q000528:radiation effects*; D007259:Infrared Rays; D008027:Light; D008029:Lighting; D010834:Phytochrome / Q000502:physiology / Q000528:radiation effects
chemical_list: D010834:Phytochrome