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Plant Physiology 55:951-953 (1975)
© 1975 American Society of Plant Biologists

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Articles

Leaf Tissue Senescence

Constant Responsiveness to Hormones Despite a Seasonal Cycle in Senescence Rate 1

Peter J. Manos and Jonathan Goldthwaite2

a The Biological Laboratories, Harvard University, Cambridge, Massachusetts 02138

During winter, excised leaf tissue from Rumex obtusifolius degrades chlorophyll at twice the summer rate but the plant hormones, gibberellic acid and zeatin, inhibit the senescence rate by a constant percentage, regardless of season.

2 Present address: Department of Biology, Boston College, Chestnut Hill, Mass. 02167.

1 This work was supported in part by a National Institutes of Health Grant HD 06851, and by a National Institutes of Health Grant T 01 GM 00036 to P.J.M.






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ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1975 by the American Society of Plant Biologists