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Innate immunity: has poplar made its BED?
Hugo Germain and Armand Séguin
The New Phytologist
Vol. 189, No. 3 (February 2011), pp. 678-687
Stable URL: http://www.jstor.org/stable/40983899
Page Count: 10
You can always find the topics here!Topics: Pathogens, Plants, Genes, Hybridity, Rice, Genetic loci, Species, Signals, Genetics, Public administration
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The perennial plant model species Populus trichocarpa has received considerable attention in the last 5 yr because of its potential use as a bioenergy crop. The completion of its genome sequence revealed extensive homologies with the herbaceous annual species Arabidopsis thaliana. This review highlights the similarities and differences at the qualitative defence response components level, notably in putative NBS-LRR protein content and downstream defence regulators. With almost a twofold NBS-LRR gene complement compared with A thaliana, P. trichocarpa also encodes some putative R-proteins with unusual architectures and possible DNA-binding capacity. P. trichocarpa also possesses all the known main components characteristic of TIR-NB-LRR and CC-NB-LRR signalling. However, very little has been done with regard to the components involved in the poplar qualitative response to pathogens. In addition, the relationship between plant-biotroph perception/signalling and the role of salicylic acid, an important defence compound, remains uncertain. This review aims to identify the genomic components present in poplar that could potentially participate in the qualitative response and highlights where efforts should be devoted to obtain a better understanding of the poplar qualitative defence response.
The New Phytologist © 2011 New Phytologist Trust