Abstract
Freezing or desiccation of winter rape leaves (Brassica napus L. var. oleifera (cv. Górczanski) stimulated both lipoxygenase (EC 1.13.11.12) activity and ethylene formation during the post‐stress period. The effect depended on the degree of membrane injury. In tissues showing injury less than 50% (as checked with the electrical conductivity method) both activities increased according to the degree of stress‐induced damage. In leaves injured to a higher degree both activities decreased. Light and low temperature (5°C) inhibited the development of both lipoxygenase activity and ethylene formation in leaf disks stored for 20 h. Ethylene formation was also observed in a model system where soybean lipoxygenase was added to a mixture containing 1‐aminocyclopropane‐1‐carboxylic acid and linoleic or linolenic acid as substrate for lipoperoxide formation. Changes in pH and temperature conditions of the incubation mixture caused similar differences in the lipoxygenase activity and ethylene formation. We propose that the stimulation of lipoxygenase‐catalysed oxidation of polyunsaturated fatty acids (increasing free radical formation) leads to an increased ethylene production from ACC.
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Dates
Type | When |
---|---|
Created | 19 years, 4 months ago (April 30, 2006, 7:09 p.m.) |
Deposited | 1 year, 10 months ago (Oct. 19, 2023, 9:28 p.m.) |
Indexed | 2 months, 3 weeks ago (June 11, 2025, 2:23 a.m.) |
Issued | 40 years, 2 months ago (July 1, 1985) |
Published | 40 years, 2 months ago (July 1, 1985) |
Published Online | 19 years, 4 months ago (April 28, 2006) |
Published Print | 40 years, 2 months ago (July 1, 1985) |
@article{Kacperska_1985, title={Is lipoxygenase involved in the formation of ethylene from ACC?}, volume={64}, ISSN={1399-3054}, url={http://dx.doi.org/10.1111/j.1399-3054.1985.tb03349.x}, DOI={10.1111/j.1399-3054.1985.tb03349.x}, number={3}, journal={Physiologia Plantarum}, publisher={Wiley}, author={Kacperska, Alina and Kubacka‐Zgbalska, Maria}, year={1985}, month=jul, pages={333–338} }