Inhibition of Photosensitive Lettuce-Seed Germination by Methionine Sulfoximine, a Specific Inhibitor of Glutamine Synthetase
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L-Methionine-DL-sulfoximine (MSO), a specific inhibitor of glutamine synthetase (GS), severely inhibited germination of New York 515 Improved and of Grand Rapids lettuce seeds. However, the elongation of excised axes was not affected by MSO. MSO (1 mM) decreased the growth potential of the axes to a level nearly equal to the restraining force of the seed coats (about 0.4M). When seeds were treated with MSO at 25℃ free ammonia accumulated in the seeds. MSO inhibited germination of several other light-sensitive or light-hard seeds, but not light-indifferent seeds.
- 日本植物生理学会の論文
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