Journal Article

Expression of a WIPK-Activated Transcription Factor Results in Increase of Endogenous Salicylic Acid and Pathogen Resistance in Tobacco Plants

Frank Waller, Axel Müller, Kwi-Mi Chung, Yun-Kiam Yap, Kimiyo Nakamura, Elmar Weiler and Hiroshi Sano

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 47, issue 8, pages 1169-1174
Published in print August 2006 | ISSN: 0032-0781
Published online August 2006 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcj079
Expression of a WIPK-Activated Transcription Factor Results in Increase of Endogenous Salicylic Acid and Pathogen Resistance in Tobacco Plants

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

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NtWIF is a transcription factor activated upon phosphorylation by wound-induced protein kinase (WIPK) in tobacco plants. Transgenic tobacco plants overexpressing NtWIF exhibited constitutive accumulation of transcripts for pathogenesis-related genes, PR-1a and PR-2. Salicylic acid levels were 50-fold higher than those in wild-type plants. The levels of jasmonic acid and IAA did not significantly differ, while an increase of ABA upon wounding was delayed by 3 h in the transgenics. When challenged with tobacco mosaic virus, lesions developed faster and were smaller in the transgenic plants. The results suggest that NtWIF is likely to influence salicylic acid biosynthesis, being located downstream of WIPK.

Keywords: Hypersensitive response; Necrotic lesion; Nicotiana tabacum; Salicylic acid; Tobacco mosaic virus; Wound-induced protein kinase

Journal Article.  3882 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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