Document Type
Article
Publication Date
8-1993
Publication Title
American Journal of Plant Physiology
Department
Geisel School of Medicine
Abstract
Ambient light is the major agent mediating entrainment of circadian rhythms and is also a major factor influencing development and morphogenesis. We show that in Neurospora crassa the expression of clock-controlled gene 2 (ccg-2), a gene under the control of the circadian clock and allelic to the developmental gene easy wettable (eas), is regulated by light in wild-type strains. Light elicits a direct and important physiological effect on ccg-2(eas) expression as demonstrated using several mutant Neurospora strains. In white collar mutants (wc-1 and wc-2) that are “blind” to blue light, ccg-2(eas) mRNA shows no variation following illumination with saturating light. By contrast, ccg-2(eas) mRNA is photoinduced in clock-null strains such as frequency9 (bd;frq9). The results in the clock mutants show that an intact circadian oscillator is not required for light induction of ccg-2(eas). Thus, ccg-2(eas) is subject to a dual regulation that involves separable regulation by light and circadian rhythm.
DOI
10.1104/pp.102.4.1299
Original Citation
Arpaia G, Loros JJ, Dunlap JC, Morelli G, Macino G. The interplay of light and the circadian clock. Independent dual regulation of clock-controlled gene ccg-2(eas). Plant Physiol. 1993;102(4):1299-1305. doi:10.1104/pp.102.4.1299
Dartmouth Digital Commons Citation
Arpaia, Guiseppina; Loros, Jennifer J.; Dunlap, Jay C.; Morelli, Giorgio; and Macino, Guiseppe, "The Interplay of Light and the Circadian Clock. Independent Dual Regulation of Clock-Controlled Gene Ccg-2(eas)" (1993). Dartmouth Scholarship. 3684.
https://digitalcommons.dartmouth.edu/facoa/3684
Included in
Biochemistry, Biophysics, and Structural Biology Commons, Physical Sciences and Mathematics Commons
