PLANT PHYSIOLOGY , Vol 104, Issue 2 387-394, Copyright © 1994 by American Society of Plant Biologists
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MOLECULAR BIOLOGY AND GENE REGULATION |
Characterization and Expression of Transcripts Induced by Oxygen Deprivation in Maize (Zea mays L.)
V. M. Peschke and M. M. Sachs
Department of Biology, Washington University St. Louis, Missouri 63130 (V.M.P.)
Until recently, the only genes described in plants induced by oxygen
deprivation (anoxia or hypoxia) encoded enzymes of glucose-phosphate
metabolism. In the present study, two flooding-induced maize (Zea mays L.)
genes that may serve a different function have been identified. These
genes, with unique kinetics of mRNA induction under flooding conditions,
were not induced by heat, cold, or salt stress or by seedling death. The
predicted protein sequence of one gene, wus/1005, is similar to that of
several other plant genes, including a nasturtium (Tropaeolum majus L.)
xyloglucan-endo-transglycosylase.The predicted protein sequence of the
other gene showed no significant homology to genes of known function,
indicating that both of these genes may play novel roles in the maize
response to oxygen deprivation.