UV-B damage amplified by transposons in maize

Virginia Walbot ()
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Virginia Walbot: Stanford University

Nature, 1999, vol. 397, issue 6718, 398-399

Abstract: Abstract While absorbing visible light energy for photosynthesis, plants are unavoidably exposed to ultraviolet radiation, which is particularly harmful at shorter wavelengths (UV-B radiation). Ozone depletion in the atmosphere means that plants receive episodic or steadily increasing doses of UV-B, which damages their photosynthetic reaction centres, crosslinks cellular proteins, and induces mutagenic DNA lesions1. Plant adaptive mechanisms of shielding and repair are therefore critical to survival — for example, somatic tissues of maize and Arabidopsis defective in phenolic sunscreen pigments2, 3 incur increased DNA damage, and mutants defective in DNA repair4,5 are killed by UV-B.

Date: 1999
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DOI: 10.1038/17043

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