著者

Takumi Nishiuchi Makoto Kimura Kazuhiro Sato

出版者

日本マイコトキシン学会

雑誌

マイコトキシン (ISSN:02851466)

巻号頁・発行日

vol.65, no.2, pp.143-147, 2015-07-31 (Released:2015-09-01)

参考文献数

16

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Phytopathogenic fungi Fusarium species are etiological agents of Fusarium head blight (FHB) and produce trichothecene mycotoxins such as deoxynivalenol (DON) and nivalenol (NIV) in cereals especially barley and wheat. Trichothecenes inhibit the protein synthesis in eukaryotic ribosomes. Therefore, trichothecene-contaminated cereals often cause foodborne illness such as immunosuprression, vomiting, and diarrhea in human and livestocks. Trichothecenes are also phytotoxins and act as effectors to promote infection in host plants. Based on visible disease symptoms, we selected 15 FHB-resistant lines of barley. When these resistant lines and susceptible controls were inoculated with conidia of F. asiaticum, the mycotoxin (NIV) contaminations of resistant two lines were less than half of those of susceptible controls. Furthermore, we performed comparative analysis of global gene expression profiles between these FHB-resistant (low NIV accumulation) lines vs. susceptible controls. A number of genes including the glutathione S-transferase (HvGST13) and glutathione reductase (HvGR2) were specifically up-regulated in the FHB-resistant lines. It is likely that these two genes are involved in the detoxification of NIV by NIV-GSH conjugation in barley. Therefore, we are studying these genes as candidates of trichothecene-detoxifing genes. This study may contributes to the understanding molecular mechanism of trichothecene detoxification in cereals.

著者

Mitsuko Kishi-Kaboshi Fumitaka Abe Yoko Kamiya Kanako Kawaura Hiroshi Hisano Kazuhiro Sato

出版者

Japanese Society for Plant Biotechnology

雑誌

Plant Biotechnology (ISSN:13424580)

巻号頁・発行日

vol.40, no.3, pp.237-245, 2023-09-25 (Released:2023-09-25)

参考文献数

36

被引用文献数

1

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Genome editing is a promising method for simultaneously mutagenizing homoeologs in the three subgenomes of wheat (Triticum aestivum L.). However, the mutation rate via genome editing must be improved in order to analyze gene function and to quickly modify agronomic traits in wheat. Here, we examined the Cas9-induced mutation rates in wheat plants using two promoters for single guide RNA (sgRNA) expression and applying heat treatment during Agrobacterium tumefaciens-mediated transformation. Using the TaU6 promoter instead of the OsU6 promoter from rice (Oryza sativa L.) to drive sgRNA expression greatly improved the Cas9-induced mutation rate. Moreover, a heat treatment of 30°C for 1 day during tissue culture increased the Cas9-induced mutation rate and the variety of mutations obtained compared to tissue culture at the normal temperature (25°C). The same heat treatment did not affect the regeneration rates of transgenic plants but tended to increase the number of transgene integration sites in each transgenic plant. These results lay the foundation for improving the Cas9-induced mutation rate in wheat to enhance research on gene function and crop improvement.