Mutated BRI1 in Uzu Barley Can Provide Disease Resistance
September 3, 2014| |
Brassinosteroid hormones regulate many aspects of plant growth and development with the membrane receptor BRI1 as the central player in the signaling cascade. A team of researchers led by Shahin S. Ali of the University College of Dublin in Ireland are studying the semi-dwarf "uzu" barley, which carries a mutation in BRI1 known for its positive contribution to yield and lodging resistance.
The "uzu" barley exhibited enhanced resistance to a wide range of pathogens due to a combination of pre-formed and inducible defense responses. Gene expression studies revealed that the uzu barley has a repressed brassinosteroid signaling. Reduction of BRI1 RNA levels compromised uzu's disease resistance.
These suggest that the pathogen resistance of "uzu" may be due to the possible role of BRI1 on a plant defense pathway or the indirect effect of repressed brassinosteroid signaling.
For more information, feel free to visit: http://www.biomedcentral.com/content/pdf/s12870-014-0227-1.pdf.
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