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Plant Physiology 66:637-640 (1980)
© 1980 American Society of Plant Biologists

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Articles

Development of Mitochondrial Activities in Pea Cotyledons

INFLUENCE OF DESICCATION DURING AND FOLLOWING GERMINATION OF THE AXIS 1

Yukio Morohashi2 and J. Derek Bewley

Department of Biology, University of Calgary, Calgary, Alberta T2N 1N4, Canada

Mitochondria in 4-hour imbibed and desiccated pea cotyledons develop in a similar manner upon rehydration to those in cotyledons hydrated only once. As a consequence of desiccation during imbibition, mitochondria revert to their original state as in the mature dry cotyledon, although limited damage occurs. This damage is more evident when the initial imbibition time before desiccation is longer. The presence of the axis does not protect cotyledonary mitochondria from damage, nor does it influence mitochondrial development upon rehydration of desiccated cotyledons. During the early hours after the start of imbibition mitochondrial development is dependent both upon hydration levels of the cotyledon and upon other metabolic processes, as shown by sensitivity to conditions that prevent ATP synthesis.

2 Permanent address: Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183, Japan.

1 Supported by Natural Sciences and Engineering Research Council, Canada grants A6352 and E2550, and appropriations from the University of Calgary Research Policy and Grants Committee.




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The mitochondrial compartment
J. Exp. Bot., March 1, 2006; 57(6): 1225 - 1243.
[Abstract] [Full Text] [PDF]


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Copyright © 1980 by the American Society of Plant Biologists