Blue and green light-induced phototropism in Arabidopsis thaliana and Lactuca sativa L. seedlings

Exposure time-response curves for blue and green light-induced phototropic bending in hypocotyls of Arabidopsis thaliana (L.) Heynh. and Lactuca sativa L. seedlings are presented. These seedlings show significant phototropic sensitivity up to 540 to 550 nanometers. Since wavelengths longer than 560...

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Veröffentlicht in:	Plant Physiol.; (United States) 1985-01, Vol.77 (1), p.248-251
Hauptverfasser:	Steinitz, B, Ren, Z.L, Poff, K.L
Format:	Artikel
Sprache:	eng
Schlagworte:	551000 - Physiological Systems ARABIDOPSIS BASIC BIOLOGICAL SCIENCES Bending Biological and medical sciences BLUE LIGHT CHEMICAL REACTIONS CRUCIFERAE Curvature ELECTROMAGNETIC RADIATION Fluence Fundamental and applied biological sciences. Psychology Hypocotyls LACTUCA SATIVA Lettuce Light Optical filters PHOTOCHEMICAL REACTIONS PHOTOSENSITIVITY PHOTOSYNTHESIS Phototropism Physical agents Plant physiology and development PLANTS PLANTULAS PLANTULE RADIATIONS SEEDLINGS SENSITIVITY Short Communications SYNTHESIS TROPISME TROPISMO TROPISMS Vegetative apparatus, growth and morphogenesis. Senescence VISIBLE RADIATION WAVELENGTHS
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Zusammenfassung:	Exposure time-response curves for blue and green light-induced phototropic bending in hypocotyls of Arabidopsis thaliana (L.) Heynh. and Lactuca sativa L. seedlings are presented. These seedlings show significant phototropic sensitivity up to 540 to 550 nanometers. Since wavelengths longer than 560 nanometers do not induce phototropic bending, it is suggested that the response to 510 to 550 nanometers light is mediated by the specific blue light photoreceptor of phototropism. We advise care in the use of green 'safelights' for studies of phototropism.
ISSN:	0032-0889 1532-2548
DOI:	10.1104/pp.77.1.248