Lancaster EPrints

Disease and decomposition : contrasting aspects of UV-B effects on microbes.

Paul, Nigel D. and Moody, S. (1999) Disease and decomposition : contrasting aspects of UV-B effects on microbes. Photochemistry and Photobiology, 69 (S1). 62S-62S. ISSN 0031-8655

Full text not available from this repository.

Abstract

Increased UVB radiation, arising from stratospheric ozone depletion may influence crops and native vegetation by altering a range of plant-microbe interactions, including disease and decomposition. Such effects of UVB may result from direct effects on micro-organisms or indirect effects, mediated via changes in the host plant. The responses of plant diseases to increased UVB reflect both direct and indirect effects. However, our studies of Septoria tritici infecting wheat highlight the role of direct UVB effects on the fungus in this system. In controlled environment experiments infection was significantly decreased by elevated UVB after inoculation, but UVB prior to inoculation had no effect. Field experiments using a modulated UVB supplement also showed significant reductions in natural S. tritici of a wheat crop, but such reductions were transient. appeared to be dependent on weather conditions. and resulted in no change in crop yield. The responses of microbial decomposition to increased UVB also reflect both direct and indirect effects. For example, we have shown highly marked interspecific variation in the response of decomposer fungi to direct UVB exposure. and changes in the fungal decomposer community following decomposition under increased UVB conditions. lndirect UVB effects on decomposition also occur, and are evident in altered patterns of microbial respiration. Such responses may reflect changes in host nitrogen concentration, and may have their greatest ecological effects via changes in nutrient cycling.

Item Type: Article
Journal or Publication Title: Photochemistry and Photobiology
Subjects: Q Science > QH Natural history > QH301 Biology
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 8830
Deposited By: Dr Nigel Paul
Deposited On: 13 May 2008 15:17
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:27
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/8830

Actions (login required)

View Item