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The experimental phytotoxicology of germanium in relation to silicon |
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| Authors: | N J Puerner S M Siegel B Z Siegel |
| Institution: | 1. Department of Botany, College of Natural Sciences, University of Hawaii at Manoa, 96822, Honolulu, HI, USA 2. Department of Botany, College of Natural Sciences, University of Hawaii at Manoa, 96822, Honolulu, HI, USA 3. Department of Environmental Health Science, School of Public Health, University of Hawaii at Manoa, 96822, Honolulu, HI, USA |
| Abstract: | The common belief that the sensitivity of plants to Ge is evidence for a Si requirement has been examined experimentally using barely, wheat, cucumber and radish cultivars. All 4 test plants were inhibited by Na2GeO3 (metagermanate) at 1 mM or less, including germination, shoot height, root length, and first leaf growth in barley and wheat. The application of Na2SiO3 (metasilicate) counteracted Ge-inhibition only in barley. Further, only barley growth was stimulated by the application of Na2SiO3. Necrotic lesions were characteristic of Ge-toxicity only in barley leaves, and were reduced when Na2SiO3 was supplied. |
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