This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Web of Science (89) Citing Articles via Google Scholar Google Scholar Articles by De Fabo, E. C. Articles by Shropshire, W. Search for Related Content PubMed PubMed Citation Articles by De Fabo, E. C. Articles by Shropshire, W., Jr. Agricola Articles by De Fabo, E. C. Articles by Shropshire, W.

Articles

Action Spectrum between 260 and 800 Nanometers for the Photoinduction of Carotenoid Biosynthesis in Neurospora crassa^1,2

^a Radiation Biology Laboratory, Smithsonian Institution, Rockville, Maryland 20852

An action spectrum for light-induced carotenoid biosynthesis in Neurospora crassa was determined in 4 to 20 nm steps from 260 to 800 nm. Four-day, dark-grown mycelial pads of N. crassa were exposed to varying amounts of monochromatic radiant energy and time. After a 48-hour incubation period at 6 C, carotenoid content was assayed spectrophotometrically in vivo. The action spectrum has maxima at 450 and 481 nm in the visible range and at 280 and 370 nm in the ultraviolet. A pigment synthesized by Neurospora whose absorption spectrum resembles the action spectrum is -carotene.

A model for the regulation of carotenoid biosynthesis in N. crassa is proposed which describes a mechanism by which -carotene could act as a photoregulator. This carotenoid is suggested to be both photoreceptor for and regulator of carotenoid biosynthesis.

² This research was presented by E.C.D. in partial fulfillment of Ph.D. requirements at George Washington University, Washington, D.C.

This article has been cited by other articles:

				B. Grimaldi, P. Coiro, P. Filetici, E. Berge, J. R. Dobosy, M. Freitag, E. U. Selker, and P. Ballario The Neurospora crassa White Collar-1 dependent Blue Light Response Requires Acetylation of Histone H3 Lysine 14 by NGF-1 Mol. Biol. Cell, October 1, 2006; 17(10): 4576 - 4583. [Abstract] [Full Text] [PDF]

				S. Casas-Flores, M. Rios-Momberg, M. Bibbins, P. Ponce-Noyola, and A. Herrera-Estrella BLR-1 and BLR-2, key regulatory elements of photoconidiation and mycelial growth in Trichoderma atroviride Microbiology, November 1, 2004; 150(11): 3561 - 3569. [Abstract] [Full Text] [PDF]

				T. Roenneberg and M. Merrow Seasonality and Photoperiodism in Fungi J Biol Rhythms, August 1, 2001; 16(4): 403 - 414. [Abstract] [PDF]