The phenylalanine pathway is the main route of salicylic acid biosynthesis in Tobacco mosaic virus-infected tobacco leaves
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- Ogawa Daisuke
- Graduate School of Life and Environmental Sciences, University of Tsukuba Biodiversity Conservation Research Project, National Institute for Environmental Studies
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- Nakajima Nobuyoshi
- Biodiversity Conservation Research Project, National Institute for Environmental Studies
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- Seo Shigemi
- Plant Physiology Department, National Institute of Agrobiological Sciences
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- Mitsuhara Ichiro
- Plant Physiology Department, National Institute of Agrobiological Sciences
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- Kamada Hiroshi
- Graduate School of Life and Environmental Sciences, University of Tsukuba
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- Ohashi Yuko
- Plant Physiology Department, National Institute of Agrobiological Sciences
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- phenylalanine pathway is the main route of salicylic acid biosynthesis in Tobacco mosaic virus infected tobacco leaves
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In plants, salicylic acid (SA), a molecule important for resistance to pathogens, is synthesized from phenylalanine or isochorismate. Although SA is reportedly synthesized via the isochorismate pathway in pathogen-infected Arabidopsis, the predominant pathway in pathogen-infected tobacco has not been known. To determine the pathway in tobacco, we studied the gene expression and enzyme activity of phenylalanine ammonia-lyase (PAL) and isochorismate synthase (ICS) in tobacco leaves infected with Tobacco mosaic virus (TMV). Two days after TMV inoculation, necrotic lesions had appeared, and the levels of SA, PAL activity, and transcripts of PAL A and PAL B had increased substantially. In contrast, no ICS activity was detected, and the levels of ICS transcript did not increase, after the formation of necrotic lesions caused by TMV infection. These results suggest that SA is synthesized mainly by the phenylalanine pathway in TMV-infected and necrotic-lesion-bearing tobacco leaves.
収録刊行物
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- Plant Biotechnology
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Plant Biotechnology 23 (4), 395-398, 2006
日本植物バイオテクノロジー学会
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詳細情報 詳細情報について
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- CRID
- 1390001204329092992
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- NII論文ID
- 10021909145
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- NII書誌ID
- AA11250821
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- COI
- 1:CAS:528:DC%2BD28XhtFSjsr7K
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- ISSN
- 13476114
- 13424580
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- NDL書誌ID
- 8041126
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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