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  Dietary plant phenolic improves survival of bacterial infection in Manduca sexta caterpillars

Del Campo, M. L., Halitschke, R., Short, S. M., Lazzaro, B. P., & Kessler, A. (2013). Dietary plant phenolic improves survival of bacterial infection in Manduca sexta caterpillars. Entomologia Experimentalis et Applicata, 146(3), 321-331. doi:10.1111/eea.12032.

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資料種別: 学術論文

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EXT533.pdf (出版社版), 2MB
 
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 作成者:
Del Campo, Marta L., 著者
Halitschke, Rayko1, 著者           
Short, Sarah M., 著者
Lazzaro, Brian P., 著者
Kessler, Andre, 著者
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1External Organizations, ou_persistent22              

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 要旨: Plant phenolics are generally thought to play significant roles in plant defense against herbivores and pathogens. Many plant taxa, including Solanaceae, are rich in phenolic compounds and some insect herbivores have been shown to acquire phenolics from their hosts to use them as protection against their natural enemies. Here we demonstrate that larvae of an insect specialist on Solanaceae, the tobacco hornworm, Manduca sexta L. (Lepidoptera: Sphingidae), acquire the plant phenolic chlorogenic acid (CA), and other caffeic acid derivatives as they feed on one of their hosts, Nicotiana attenuata L. (Solanaceae), and on artificial diet supplemented with CA. We test the hypothesis that larvae fed on CA-supplemented diet would have better resistance against bacterial infection than larvae fed on a standard CA-free diet by injecting bacteria into the hemocoel of fourth instars. Larvae fed CA-supplemented diet show significantly higher survival of infection with Enterococcus faecalis (Andrewes & Horder) Schleifer & Kilpper-Bälz, but not of infection with the more virulent Pseudomonas aeruginosa (Schroeter) Migula. Larvae fed on CA-supplemented diet possess a constitutively higher number of circulating hemocytes than larvae fed on the standard diet, but we found no other evidence of increased immune system activity, nor were larvae fed on CA-supplemented diet better able to suppress bacterial proliferation early in the infection. Thus, our data suggest an additional defensive function of CA to the direct toxic inhibition of pathogen proliferation in the gut.

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 日付: 2013-02-052013-03
 出版の状態: 出版
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 識別子(DOI, ISBNなど): その他: EXT533
DOI: 10.1111/eea.12032
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出版物名: Entomologia Experimentalis et Applicata
種別: 学術雑誌
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出版社, 出版地: Dordrecht [etc.] : Kluwer [etc.]
ページ: - 巻号: 146 (3) 通巻号: - 開始・終了ページ: 321 - 331 識別子(ISBN, ISSN, DOIなど): ISSN: 0013-8703
CoNE: https://pure.mpg.de/cone/journals/resource/954925397456