
%0 Journal Article
%A Pinto, Manuel E. 
%A Edwards, Gerald E. 
%A Riquelme, Alejandro A. 
%A Ku, Maurice S. B. 
%T Enhancement of nodulation in bean (<emph type="2">Phaseolus</emph> <emph type="2">vulgaris</emph>) by UV-B irradiation
%J Functional Plant Biology
%D 2002/10/18
%V 29
%N 10
%P 1189-1196
%K bean, nodulation, Phaseolus vulgaris L., UV-B radiation.
%R https://doi.org/10.1071/FP02012
%U https://www.publish.csiro.au/paper/FP02012 
%X Exposure of bean plants grown in the greenhouse, where UV-B is low, to ambient levels of UV-B light stimulated nodulation more than 2.5-fold. Reduction of UV-B radiation to 3% of ambient levels for outdoor-grown plants through use of Mylar filters consistently reduced nodulation by 45%. The increase in nodulation caused by UV-B was mainly due to an increase in number and size of nodules. The amounts of UV-B-absorbing compounds in roots of UV-B-exposed plants increased almost 5-fold. However, the composition of UV-B-absorbing compounds remained very similar. Exposing leaves to UV-B also significantly increased release of these compounds from roots to the medium. These results suggest that UV-B radiation enhances nodulation, and that a signal may be transported from shoot to roots to play a role in nodulation. 
