| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Instituto de Investigación en Biología Experimental, Facultad de Química, Universidad de Guanajuato, Apartado postal 187, Guanajuato 36050, Mexico
2 Departamento de Ingeniería Genética de Plantas, CINVESTAV Unidad Irapuato, Apartado postal 629, Irapuato 36500, Mexico
Correspondence
Alfredo Herrera-Estrella
aherrera{at}ira.cinvestav.mx
In fungi, phototropism, the induction of carotenogenesis and reproductive structures, and resetting of the circadian rhythm are controlled by blue light. Trichoderma atroviride, a fungus used in biological control, sporulates in a synchronized manner following a brief pulse of blue light. Due to its apparent simplicity, this response was chosen for pursuing photoreceptor isolation. Two genes were cloned, blue-light regulators 1 and 2 (blr-1 and blr-2), similar to the Neurospora crassa white-collar 1 and 2, respectively. The BLR-1 protein has all the characteristics of a blue-light photoreceptor, whereas the structure of the deduced BLR-2 protein suggests that it interacts with BLR-1 through PAS domains to form a complex. Disruption of the corresponding genes demonstrated that they are essential for blue-light-induced conidiation. blr-1 and blr-2 were also shown to be essential for the light-induced expression of the photolyase-encoding gene (phr-1). Mechanical injury of mycelia was found to trigger conidiation of T. atroviride, a response not described previously. This response was not altered in the mutants. A novel effect of both red and blue light on mycelial growth was found involving another light receptor, which is compensated by the BLR proteins.
These authors contributed equally to this work. The GenBank/EMBL/DDBJ accession numbers for the sequences reported in this paper are AY628431 for blr-1 and AY628432 for blr-2.
This article has been cited by other articles:
|
|
 |
|
  M. C. Ruiz-Roldan, V. Garre, J. Guarro, M. Marine, and M. I. G. Roncero Role of the White Collar 1 Photoreceptor in Carotenogenesis, UV Resistance, Hydrophobicity, and Virulence of Fusarium oxysporum Eukaryot. Cell, July 1, 2008; 7(7): 1227 - 1230. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. A. Friedl, M. Schmoll, C. P. Kubicek, and I. S. Druzhinina Photostimulation of Hypocrea atroviridis growth occurs due to a cross-talk of carbon metabolism, blue light receptors and response to oxidative stress Microbiology, April 1, 2008; 154(4): 1229 - 1241. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. A. Friedl, C. P. Kubicek, and I. S. Druzhinina Carbon Source Dependence and Photostimulation of Conidiation in Hypocrea atroviridis Appl. Envir. Microbiol., January 1, 2008; 74(1): 245 - 250. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Komon-Zelazowska, T. Neuhof, R. Dieckmann, H. von Dohren, A. Herrera-Estrella, C. P. Kubicek, and I. S. Druzhinina Formation of Atroviridin by Hypocrea atroviridis Is Conidiation Associated and Positively Regulated by Blue Light and the G Protein GNA3 Eukaryot. Cell, December 1, 2007; 6(12): 2332 - 2342. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. U. Esquivel-Naranjo and A. Herrera-Estrella Enhanced responsiveness and sensitivity to blue light by blr-2 overexpression in Trichoderma atroviride Microbiology, November 1, 2007; 153(11): 3909 - 3922. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. M. Berrocal-Tito, E. U. Esquivel-Naranjo, B. A. Horwitz, and A. Herrera-Estrella Trichoderma atroviride PHR1, a Fungal Photolyase Responsible for DNA Repair, Autoregulates Its Own Photoinduction Eukaryot. Cell, September 1, 2007; 6(9): 1682 - 1692. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Rosales-Saavedra, E. U. Esquivel-Naranjo, S. Casas-Flores, P. Martinez-Hernandez, E. Ibarra-Laclette, C. Cortes-Penagos, and A. Herrera-Estrella Novel light-regulated genes in Trichoderma atroviride: a dissection by cDNA microarrays. Microbiology, November 1, 2006; 152(Pt 11): 3305 - 3317. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Casas-Flores, M. Rios-Momberg, T. Rosales-Saavedra, P. Martinez-Hernandez, V. Olmedo-Monfil, and A. Herrera-Estrella Cross Talk between a Fungal Blue-Light Perception System and the Cyclic AMP Signaling Pathway Eukaryot. Cell, March 1, 2006; 5(3): 499 - 506. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Schmoll, L. Franchi, and C. P. Kubicek Envoy, a PAS/LOV Domain Protein of Hypocrea jecorina (Anamorph Trichoderma reesei), Modulates Cellulase Gene Transcription in Response to Light Eukaryot. Cell, December 1, 2005; 4(12): 1998 - 2007. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. Terashima, K. Yuki, H. Muraguchi, M. Akiyama, and T. Kamada The dst1 Gene Involved in Mushroom Photomorphogenesis of Coprinus cinereus Encodes a Putative Photoreceptor for Blue Light Genetics, September 1, 2005; 171(1): 101 - 108. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| INT J SYST EVOL MICROBIOL | MICROBIOLOGY | J GEN VIROL |
| J MED MICROBIOL | ALL SGM JOURNALS | |
