Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 109, Issue 30, Pages 12135-12140Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1121292109
Keywords
-
Categories
Funding
- Howard Hughes Medical Institute
- Agencia Nacional de Promocion Cientifica y Tecnica [PICT2008-1729]
- Universidad de Buenos Aires [UBACyT, X-240]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas de Argentina [PIP-545]
- [NSF-0843662]
- Div Of Molecular and Cellular Bioscience
- Direct For Biological Sciences [0843662] Funding Source: National Science Foundation
Ask authors/readers for more resources
Rhizobium leguminosarum is a soil bacterium that infects root hairs and induces the formation of nitrogen-fixing nodules on leguminous plants. Light, oxygen, and voltage (LOV)-domain proteins are blue-light receptors found in higher plants and many algae, fungi, and bacteria. The genome of R. leguminosarum bv. viciae 3841, a peanodulating endosymbiont, encodes a sensor histidine kinase containing a LOV domain at the N-terminal end (R-LOV-HK). R-LOV-HK has a typical LOV domain absorption spectrum with broad bands in the blue and UV-A regions and shows a truncated photocycle. Here we show that the R-LOV-HK protein regulates attachment to an abiotic surface and production of flagellar proteins and exopolysaccharide in response to light. Also, illumination of bacterial cultures before inoculation of pea roots increases the number of nodules per plant and the number of intranodular bacteroids. The effects of light on nodulation are dependent on a functional lov gene. The results presented in this work suggest that light, sensed by R-LOV-HK, is an important environmental factor that controls adaptive responses and the symbiotic efficiency of R. leguminosarum.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available