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Effect of Infection Timing on Fusarium Head Blight and Mycotoxin Accumulation in Open- and Closed-Flowering Barley by Megumi Yoshida, Naoyuki Kawada. is a nonfiction available to read on EtoBox.

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PHYTOPATHOLOGY Vol. 97, No. 9, 2007, Р. 1054-1062 Megumi Yoshida, Naoyuki Kawada, and Takashi Nakajima ABSTRACT Barley has two flowering types, chasmogamous (open-flowering) and cleistogamous (closed-flowering). We examined the effect of the timing of Fusarium graminearum infection on Fusarium head blight (FHB) and mycotoxin accumulation in barley cultivars with different flowering types using greenhouse experiments. In the first experiment, 13 cultivars were spray inoculated at two different developmental stages, and the severity of FHB was evaluated. The effect of the timing of infection differed among cultivars. Cleistogamous cultivars were resistant at anthesis but suscep- tible at 10 days after anthesis, whereas chasmogamous cultivars were already susceptible at anthesis. In the second experiment, five cultivars were inoculated at three different developmental stages and the concen- trations of deoxynivalenol (DON) and nivalenol (NIV) in mature grain were analyzed. Cleistogamous cultivars accumulated more mycotoxins (DON and NIV) when inoculated 10 or 20 days after anthesis than when inoculated at anthesis, whereas chasmogamous cultivars accumulated more mycotoxins when inocu

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Author

Megumi Yoshida, Naoyuki Kawada.

Language

EN

Category

nonfiction

Subjects

Science, Biology, Stem