This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Breidenbach, R. W. Articles by Lyons, J. M. Search for Related Content PubMed PubMed Citation Articles by Breidenbach, R. W. Articles by Lyons, J. M. Agricola Articles by Breidenbach, R. W. Articles by Lyons, J. M.

Articles

Effect of Chilling Temperatures on the Activities of Glyoxysomal and Mitochondrial Enzymes from Castor Bean Seedlings ¹

^a Department of Agronomy and Range Science and Department of Vegetable Crops, University of California, Davis, California 95616

Castor bean (Ricinus communis L.) is included among the group of plants sensitive to chilling temperatures. Seedlings of this species were shown to exhibit visible symptoms of this injury, as well as impaired radicle growth and storage product mobilization. Respiration of intact seedlings and oxidation of succinate by isolated mitochondria displayed discontinuities in Arrhenius plots of their reaction velocities, characteristic of chilling species. However, gluconeogenic glyoxysomal enzymes do not display such discontinuities, indicating that there is probably no functional relationship between these enzymes and the glyoxysomal membrane.

¹ This work was supported in part by Hatch Act Funds, National Science Foundation Grant GB 7868, Dupont Young Faculty Award from E. I. Dupont de Nemours and Co. to R.W.B., and Commonwealth Scientific and Industrial Research Organization (Australia) Postdoctoral Award to N.L.W.