Abstract:
:To characterize the molecular mechanisms underlying life-stage transitions in Phytophthora infestans, we initiated a chemical genetics approach by screening for a stage-specific inhibitor of morphological development from microbial culture extracts prepared mostly from actinomycetes from soil in Japan. Of the more than 700 extracts, one consistently inhibited Ph. infestans cyst germination. Purification and identification of the active compound by ESI-MS, 1H-NMR, and 13C-NMR identified β-rubromycin as the inhibitor of cyst germination (IC50 = 19.8 μg/L); β-rubromycin did not inhibit growth on rye media, sporangium formation, zoospore release, cyst formation, or appressorium formation in Ph. infestans. Further analyses revealed that β-rubromycin inhibited the germination of cysts and oospores in Pythium aphanidermatum. A chemical genetic approach revealed that β-rubromycin stimulated the expression of RIO kinase-like gene (PITG_04584) by 60-fold in Ph. infestans. Genetic analyses revealed that PITG_04584, which lacks close non-oomycete relatives, was involved in zoosporogenesis, cyst germination, and appressorium formation in Ph. infestans. These data imply that further functional analyses of PITG_04584 may contribute to new methods to suppress diseases caused by oomycetes.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Tani S,Nishio N,Kai K,Hagiwara D,Ogata Y,Tojo M,Sumitani JI,Judelson HS,Kawaguchi Tdoi
10.1038/s41598-020-79326-7subject
Has Abstractpub_date
2020-12-18 00:00:00pages
22326issue
1issn
2045-2322pii
10.1038/s41598-020-79326-7journal_volume
10pub_type
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