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Physiological responses of onion plants to UV irradiation at 0°C

Authors
Journal
Radiation Botany
0033-7560
Publisher
Elsevier
Publication Date
Volume
14
Issue
1
Identifiers
DOI: 10.1016/s0033-7560(74)90108-2
Disciplines
  • Biology

Abstract

Prolonged exposure of Allium leaves to UV light (2537 ) at low temperature induced moisture loss, breakdown of chlorophylls a and b, and of protochlorophyll. Visible light was not effective in reversing the damage. UV also caused increases in peroxidase activities in both the leaves and roots of onion plants, even though the roots were never exposed to UV light. Catalase and pyruvate kinase were inhibited as a result of UV irradiation of the leaves, while both enzymes exhibited a marked increase in the unexposed roots.

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