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PLANT PHYSIOLOGY , Vol 111, Issue 4 1177-1181, Copyright © 1996 by American Society of Plant Biologists
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WHOLE PLANT, ENVIRONMENTAL, AND STRESS PHYSIOLOGY |
Water-Deficit Tolerance and Field Performance of Transgenic Alfalfa Overexpressing Superoxide Dismutase
B. D. McKersie, S. R. Bowley, E. Harjanto and O. Leprince
Department of Crop Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1
Transgenic alfalfa (Medicago sativa) expressing Mn-superoxide dismutase
cDNA tended to have reduced injury from water-deficit stress as determined
by chlorophyll fluorescence, electrolyte leakage, and regrowth from crowns.
A 3-year field trial indicated that yield and survival of transgenic plants
were significantly improved, supporting the hypothesis that tolerance of
oxidative stress is important in adaptation to field environments.
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