Signaling of systemic acquired resistance in tobacco depends on ethylene perception

• Published in: The Plant journal : for cell and molecular biology Vol. 35; no. 1; pp. 27 - 32
• Main Authors: Verberne, Marianne C., Hoekstra, Jan, Bol, John F., Linthorst, Huub J.M.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Science Ltd 01-07-2003; Blackwell Science
• Subjects: Biological and medical sciences; Ethylenes - pharmacology; Fundamental and applied biological sciences. Psychology; Gene Expression Regulation, Plant - drug effects; long‐distance signal; Nicotiana - drug effects; Nicotiana - genetics; Nicotiana - physiology; Nicotiana - virology; pathogen defense; pathogenesis‐related proteins; Pathology. Damages, economic importance; Phytopathology. Animal pests. Plant and forest protection; Plant Leaves - immunology; Plant Leaves - metabolism; Plant Leaves - virology; Plant viruses and viroids; salicylic acid; SAR; Signal Transduction - drug effects; Tobacco mosaic virus; Tobacco Mosaic Virus - immunology; Transplants; Salicylic acid; SAR; Ethylene; pathogenesis-related proteins; Tobamovirus; Gene expression; Nicotiana tabacum; Pathogenesis related protein; Induced resistance; Host virus relation; Virus; Signal transduction; pathogen defense; Tobacco mosaic virus; Dicotyledones; Angiospermae; Defense mechanism; long-distance signal; Spermatophyta; Solanaceae; Biological accumulation
• ISSN: 0960-7412; 1365-313X
• DOI: 10.1046/j.1365-313X.2003.01778.x

Summary
The hypersensitive interaction between Tobacco mosaic virus (TMV) and tobacco results in accumulation of salicylic acid (SA), defense gene expression, and development of systemic acquired resistance (SAR) in uninfected leaves. The plant hormones SA and ethylene have been implicated in SAR. From a study with ethylene‐insensitive (Tetr) tobacco, we concluded that ethylene perception is required to generate the systemic signal molecules in TMV‐infected leaves that trigger SA accumulation, defense gene expression, and SAR development in uninfected leaves. Ethylene perception was not required for the responses of the plant to the systemic signal that leads to SAR development.