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Abstract
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UV-B-Induced PR-1 Accumulation Is Mediated by Active Oxygen Species.

R. Green, R. Fluhr
R. Green
Department of Plant Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel.
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R. Fluhr
Department of Plant Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel.
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Published February 1995. DOI: https://doi.org/10.1105/tpc.7.2.203

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  • Copyright © 1995 by American Society of Plant Biologists

Abstract

Depletion of the stratospheric ozone layer may result in an increase in the levels of potentially harmful UV-B radiation reaching the surface of the earth. We have found that UV-B is a potent inducer of the plant pathogenesis-related protein PR-1 in tobacco leaves. UV-B fluences required for PR-1 accumulation are similar to those of other UV-B-induced responses. The UV-B-induced PR-1 accumulation was confined precisely to the irradiated area of the leaf but displayed no leaf tissue specificity. A study of some of the possible components of the signal transduction pathway between UV-B and PR-1 induction showed that photosynthetic processes are not essential, and photoreversible DNA damage is not involved. Antioxidants and cycloheximide were able to block the induction of PR-1 by UV-B, and treatment of leaves with a generator of reactive oxygen resulted in the accumulation of PR-1 protein. These results demonstrate an absolute requirement for active oxygen species and protein synthesis in this UV-B signal transduction pathway. In contrast, we also show that other elicitors, notably salicylic acid, are able to elicit PR-1 via nonreactive oxygen species-requiring pathways.

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UV-B-Induced PR-1 Accumulation Is Mediated by Active Oxygen Species.
R. Green, R. Fluhr
The Plant Cell Feb 1995, 7 (2) 203-212; DOI: 10.1105/tpc.7.2.203

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UV-B-Induced PR-1 Accumulation Is Mediated by Active Oxygen Species.
R. Green, R. Fluhr
The Plant Cell Feb 1995, 7 (2) 203-212; DOI: 10.1105/tpc.7.2.203
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The Plant Cell
Vol. 7, Issue 2
Feb 1995
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