Phytophthora sojae is an oomycete and a soil-borne plant pathogen that causes stem and root rot of soybean. This is a prevalent disease in most soybean growing regions, and a major cause of crop loss.[1] In wet conditions the pathogen produces zoospores that move in water and are attracted to soybean roots. Zoospores can attach to roots, germinate, and infect the plant tissues. Diseased roots develop lesions that may spread up the stem and eventually kill the entire plant. Phytophthora sojae also produces oospores that can remain dormant in the soil over the winter, or longer, and germinate when conditions are favourable. Oospores may also be spread by animals or machinery.[2]
Phytophthora sojae is a diploid organism with a genome size of 95 Mbp (Millions of base pairs).[3]
The natural chemical farinomalein (a metabolite from entomopathogenic fungus Paecilomyces farinosus[3]) has shown potent and selective inhibition (0.15-5 μg/disk) against eight isolates of plant pathogenic Phytophthora sojae.[2] These results suggest that farinomalein might be useful as a candidate pesticide for the treatment of Phytophthora stem rot in soybean.[2]
Phytophthora sojae is so similar to Phytophthora megasperma that they're often mistaken for each other. In the early years of research, Phytophthora sojae and Phytophthora medicaginis were respectively known as Phytophthora megasperma f. sp. glycines and Phytophthora megasperma f. sp. medicaginis.[1] Recent discoveries about their molecular structure, however, proved that they were indeed unambiguous species.
^ abCite error: The named reference smith6 was invoked but never defined (see the help page).
^ abcSastia Prama Putri, Hiroshi Kinoshita, Masayasu Kato and Takuya Nihira. Antimicrobial and antioomycete activities of the novel antibiotic farinomalein. Poster Presentation 2P-2124, Annual Conference, The Society for Bioscience and Bioengineering, Japan, 28 October 2010.
^ abSastia P. Putri, Hiroshi Kinoshita, Fumio Ihara, Yasuhiro Igarashi and Takuya Nihira. Farinomalein, a Maleimide-Bearing Compound from the Entomopathogenic Fungus Paecilomyces farinosus. J. Nat. Prod., 2009, 72 (8), pp 1544-1546 doi:10.1021/np9002806
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considerably larger (240 Mbp) than that of most other Phytophthora species whose genomes have been sequenced; P. sojae has a 95 Mbp genome and P. ramorum had a 65...
which is used to cultivate the spore of Phytophthorasojae. Phytophthorasojae causes soybean blight (Phytophthora root rot of soybeans). Soybean blight...
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antifungal activity against Phytophthorasojae and Macrophomina phaseolina, and Kim et al. 2010 against Aspergillus sojae. Kaplan et al. 1980 finds nematicidal...
characterization of proteins Lima bean agar – Agar medium used to cultivate Phytophthorasojae Ouchterlony double immunodiffusion – Biomedical technique R2A agar –...
Verticillium dahliae, and Cronartium quercuum, and the oomycete Phytophthorasojae. Changes to sRNA expression in response to fungal pathogens indicate...
medium is used to cultivate the spore of Phytophthorasojae. Phytophthorasojae causes soybean blight (Phytophthora root rot of soybeans). Soybean blight...
University of Nebraska-Lincoln, n.d. Web. 17 Dec. 2014 [1] Plant Disease: Phytophthora Root and Stem Rot, University of Nebraska–Lincoln, Institute of Agriculture...
previously treated as part of the complex include Phytophthora rosacearum, P. sansomeana, P. sojae, P. medicaginis, and P. trifolii. A form of P. megasperma...
pathogenic Phytophthorasojae. These results suggest that farinomalein might be useful as a candidate pesticide for the treatment of Phytophthora stem rot...
aerial pesticide application, round hay bales, new apple cultivars, Phytophthorasojae oomycete in soybeans, removal of lead contamination in soil, and hundreds...
(1967). "Asexual Reproduction and Behavior of Zoospores of Phytophthora megasperma var. sojae". Canadian Journal of Botany. 45 (11): 1963–1981. doi:10.1139/b67-215...
(link) Falloon, Peter G.; et al. (January 1986). "Effect of phytophthora megasperma var. sojae on Yield of Asparagus officinalis". Plant Disease. 70 (1):...
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