Plant Physiol. Drug Metab Dispos
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Plant Physiology 94:1484-1487 (1990)
© 1990 American Society of Plant Biologists

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Molecular Biology and Gene Regulation

Organ Specificity and Light Regulation of NADH-Dependent Hydroxypyruvate Reductase Transcript Abundance 1

John McC. Greenler2 and Wayne M. Becker

Department of Botany, University of Wisconsin, Birge Hall, Madison, Wisconsin 53706

By probing total RNA blots with an NADH-dependent hydroxypyruvate reductase (HPR) cDNA clone, we have found that HPR transcript abundance is highly regulated in developing cucumber (Cucumis sativus) seedlings. HPR transcript levels in light-grown seedlings are 50-fold more abundant in leaves and cotyledons than in roots. When 12-day light-grown seedlings are shifted to the dark for 4 days, the HPR transcript level in leaves drops 20-fold. Upon return of these dark-adapted plants to the light, HPR transcript levels rise to 50% of the previous light-grown level within 2 hours.

2 Present address: Center for Biology Education, B37 Russell Laboratories, University of Wisconsin-Madison, Madison, WI 53706.

1 This research was supported by National Science Foundation grant DCB-8509852 to W. M. B.




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Copyright © 1990 by the American Society of Plant Biologists