Basipetally polarised transport of [3H]gibberellin A1and [14C]gibberellin A3, and acropetal polarity of [14C]indole-3-acetic acid transport, in stelar tissues ofPhaseolus coccineusroots
✍ Scribed by W. Hartung; I. D. J. Phillips
- Publisher
- Springer-Verlag
- Year
- 1974
- Tongue
- English
- Weight
- 605 KB
- Volume
- 118
- Category
- Article
- ISSN
- 0032-0935
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✦ Synopsis
Movement of both [3H]
GAi and [i4C]GA3 through root segments from P. coccineus seedlings was basipetally polarised. The basipetal/aeropetal ratio of radioactivity from [3H] GA 1 in agar receiver blocks was 9.2 for apical, elongating segments, and 4.0 for more basal, non-elongating segments. Polarity of gibberellin transport was restricted to the stele, and absent from cortical tissues. Transport of [i4C]IAA through root segments to agar receivers was preferentially acropetal, particularly so in the stele. Despite the existence of basipetal polarity of gibberellin transport in the root, [SH]GA1 injected into cotyledons moved into and aeropetally along the seedling root.