Cytokinin translocation: Changes in zeatin and zeatin-riboside levels in the root exudate of tomato plants during their development
✍ Scribed by J. E. Davey; J. Staden
- Publisher
- Springer-Verlag
- Year
- 1976
- Tongue
- English
- Weight
- 322 KB
- Volume
- 130
- Category
- Article
- ISSN
- 0032-0935
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✦ Synopsis
The zeatin and zeatin riboside content of tomato (Lycopersicon esculentum Mill.) root exudates were determined at different stages of development. Zeatin riboside was found to be the major translocational form of cytokinin in the xylem during early vegetative growth. During flower bud formation this cytokinin decreased markedly in concentration so that, at anthesis, there was no appreciable difference in the zeatin and zeatin riboside concentration in the root exudate. it was proposed that the relative levels of zeatin and zeatin riboside in root exudate could change during plant growth (Van Staden and Davey, 1976). The present study was conducted in order to establish whether or not qualitative and quantitative changes in cytokinins occur in the root exudate of tomato plants during development. This plant was selected as zeatin and its riboside have been identified as two major cytokinins in its root exudate (Van Staden and Menary, In Press).