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Science 1 September 2006:
Vol. 313. no. 5791, p. 1197
DOI: 10.1126/science.313.5791.1197i
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Figure 1 Phytophthora species are oömycetes and belong to the kingdom Stramenopila, which is evolutionarily distant from plants, animals, and fungi. Importantly, nonphotosynthetic stramenopiles, including the oömycetes, are believed to have lost their plastids at some point in evolution. The two Phytophthora genome sequences presented by Tyler et al. (p. 1261) provide compelling evidence that their ancestor indeed harbored a photosynthetic endosymbiont. The genomes also show a striking diversification of infection-associated genes, which consists of about 350 genes in each genome and reflects intense coevolutionary processes occurring between these parasitic species and their hosts.

CREDIT: ALEX MOLNAR/AGRICULTURE AND AGRI-FOOD CANADA




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Science. ISSN 0036-8075 (print), 1095-9203 (online)