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約1100万年前の隕石の痕跡 海底で発見 生物絶滅に関係か (NHK)

太平洋の南鳥島沖の海底で、およそ1100万年前に巨大な隕石が衝突したことを示す痕跡を、海洋研究開発機構などの研究グループが発見し、この時代に起きた生物の大量絶滅...

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Systemic Infection of Maize, Sorghum, Rice, and Beet Seedlings with Fumonisin-Producing and Nonproducing Fusarium verticillioides Strains.

著者 Dastjerdi R , Karlovsky P
Plant Pathol J.2015 Dec ; 31(4):334-42.
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Two fumonisin-nonproducing strains of Fusarium verticillioides and their fumonisin producing progenitors were tested for aggressiveness toward maize, sorghum, rice, and beetroot seedlings grown under greenhouse conditions. None of the plants showed obvious disease symptoms after root dip inoculation. Fungal biomass was determined by species-specific real-time PCR. No significant (P = 0.05) differences in systemic colonization were detected between the wild type strains and mutants not producing fumonisins. F. verticillioides was not detected in any of the non-inoculated control plants. The fungus grew from roots to the first two internodes/leaves of maize, rice and beet regardless of fumonisin production. The systemic growth of F. verticillioides in sorghum was limited. The results showed that fumonisin production was not required for the infection of roots of maize, rice and beet by F. verticillioides.
PMID: 26672472 [PubMed]
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