Publication Date:
2009-09-11
Description:
Phytophthora infestans is the most destructive pathogen of potato and a model organism for the oomycetes, a distinct lineage of fungus-like eukaryotes that are related to organisms such as brown algae and diatoms. As the agent of the Irish potato famine in the mid-nineteenth century, P. infestans has had a tremendous effect on human history, resulting in famine and population displacement. To this day, it affects world agriculture by causing the most destructive disease of potato, the fourth largest food crop and a critical alternative to the major cereal crops for feeding the world's population. Current annual worldwide potato crop losses due to late blight are conservatively estimated at $6.7 billion. Management of this devastating pathogen is challenged by its remarkable speed of adaptation to control strategies such as genetically resistant cultivars. Here we report the sequence of the P. infestans genome, which at approximately 240 megabases (Mb) is by far the largest and most complex genome sequenced so far in the chromalveolates. Its expansion results from a proliferation of repetitive DNA accounting for approximately 74% of the genome. Comparison with two other Phytophthora genomes showed rapid turnover and extensive expansion of specific families of secreted disease effector proteins, including many genes that are induced during infection or are predicted to have activities that alter host physiology. These fast-evolving effector genes are localized to highly dynamic and expanded regions of the P. infestans genome. This probably plays a crucial part in the rapid adaptability of the pathogen to host plants and underpins its evolutionary potential.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haas, Brian J -- Kamoun, Sophien -- Zody, Michael C -- Jiang, Rays H Y -- Handsaker, Robert E -- Cano, Liliana M -- Grabherr, Manfred -- Kodira, Chinnappa D -- Raffaele, Sylvain -- Torto-Alalibo, Trudy -- Bozkurt, Tolga O -- Ah-Fong, Audrey M V -- Alvarado, Lucia -- Anderson, Vicky L -- Armstrong, Miles R -- Avrova, Anna -- Baxter, Laura -- Beynon, Jim -- Boevink, Petra C -- Bollmann, Stephanie R -- Bos, Jorunn I B -- Bulone, Vincent -- Cai, Guohong -- Cakir, Cahid -- Carrington, James C -- Chawner, Megan -- Conti, Lucio -- Costanzo, Stefano -- Ewan, Richard -- Fahlgren, Noah -- Fischbach, Michael A -- Fugelstad, Johanna -- Gilroy, Eleanor M -- Gnerre, Sante -- Green, Pamela J -- Grenville-Briggs, Laura J -- Griffith, John -- Grunwald, Niklaus J -- Horn, Karolyn -- Horner, Neil R -- Hu, Chia-Hui -- Huitema, Edgar -- Jeong, Dong-Hoon -- Jones, Alexandra M E -- Jones, Jonathan D G -- Jones, Richard W -- Karlsson, Elinor K -- Kunjeti, Sridhara G -- Lamour, Kurt -- Liu, Zhenyu -- Ma, Lijun -- Maclean, Daniel -- Chibucos, Marcus C -- McDonald, Hayes -- McWalters, Jessica -- Meijer, Harold J G -- Morgan, William -- Morris, Paul F -- Munro, Carol A -- O'Neill, Keith -- Ospina-Giraldo, Manuel -- Pinzon, Andres -- Pritchard, Leighton -- Ramsahoye, Bernard -- Ren, Qinghu -- Restrepo, Silvia -- Roy, Sourav -- Sadanandom, Ari -- Savidor, Alon -- Schornack, Sebastian -- Schwartz, David C -- Schumann, Ulrike D -- Schwessinger, Ben -- Seyer, Lauren -- Sharpe, Ted -- Silvar, Cristina -- Song, Jing -- Studholme, David J -- Sykes, Sean -- Thines, Marco -- van de Vondervoort, Peter J I -- Phuntumart, Vipaporn -- Wawra, Stephan -- Weide, Rob -- Win, Joe -- Young, Carolyn -- Zhou, Shiguo -- Fry, William -- Meyers, Blake C -- van West, Pieter -- Ristaino, Jean -- Govers, Francine -- Birch, Paul R J -- Whisson, Stephen C -- Judelson, Howard S -- Nusbaum, Chad -- BB/E007120/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/G015244/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- G0400284/Medical Research Council/United Kingdom -- England -- Nature. 2009 Sep 17;461(7262):393-8. doi: 10.1038/nature08358. Epub 2009 Sep 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02141, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19741609" target="_blank"〉PubMed〈/a〉
Keywords:
Algal Proteins/genetics
;
DNA Transposable Elements/genetics
;
DNA, Intergenic/genetics
;
Evolution, Molecular
;
Genome/*genetics
;
Host-Pathogen Interactions/genetics
;
Humans
;
Ireland
;
Molecular Sequence Data
;
Necrosis
;
Phenotype
;
Phytophthora infestans/*genetics/pathogenicity
;
Plant Diseases/immunology/*microbiology
;
Solanum tuberosum/immunology/*microbiology
;
Starvation
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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