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Journal of Experimental Botany, Vol. 52, No. 359, pp. 1367-1373, June 1, 2001
© 2001 Oxford University Press

Short Communication

Ultraviolet-B exposure leads to up-regulation of senescence-associated genes in Arabidopsis thaliana

C.F. John1, K. Morris1, B.R. Jordan2, B. Thomas1 and S. A-H-Mackerness1,3

1 Department of Plant Genetics and Biotechnology, Horticulture Research International, Wellesbourne, Warwick CV35 9EF, UK
2 Division of Soil, Plant and Ecological Sciences, Lincoln University, PO Box 84, Canterbury, New Zealand

Abstract

Exposure to UV-B radiation resulted in a loss of chlorophyll and an increase in lipid damage in a similar manner to that induced during natural senescence. In addition, exposure to UV-B led to the induction of a number of genes associated with senescence (SAG12, 13, 14, and 17). These results show, for the first time, that exposure to UV-B can lead to cellular decline through active and regulated processes involving many genes also associated with natural senescence.

Key words: Arabidopsis, photosynthetic genes, senescence associated genes, ultraviolet-B radiation.


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