A Simple Procedure to Overcome Polyethelene Glycol Toxicity on Whole Plants
Authors:
- Evelyn FedermanEFEvelyn Federman
- 1 October 1985
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 79 (2) , 559-561
Abstract
A procedure is described that can be used to minimize toxic effects of polyethylene glycol (PEG) to plants. The procedure is based on recycling nutrient solutions containing PEG-6000 through two plant cultures. Tomato plants grown in −0.3 megapascals PEG solutions used after two growth cycles exhibited minimal toxic effects. Long-term responses like dry matter production and chlorophyll content as well as short-term responses like CO2 fixation rates and leaf conductance were severely inhibited by fresh PEG-6000 and only slightly reduced by recycled PEG-6000. Complete osmotic adjustment was obtained with tomatoes grown in recycled but not in fresh PEG solutions.Keywords
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