Skip to main content
NCBI home page
Plant Physiology logoLink to Plant Physiology
. 1974 Mar;53(3):348–351. doi: 10.1104/pp.53.3.348

Polar Transport of Kinetin in Tissues of Radish

J W Radin a,1, R S Loomis a
PMCID: PMC543221  PMID: 16658704

Abstract

Polar transport of kinetin-8-14C occurred in segments of petioles, hypocotyls, and roots of radish (Raphanus sativus L.). The polarity was basipetal in petioles and hypocotyls and acropetal in roots. In segments excised from seedlings with fully expanded cotyledons, indole-3-acetic acid was required for polarity to develop. In hypocotyl segments isolated at this stage, basipetal and acropetal movements were equal during the first 12 hours of auxin treatment after which time acropetal movement declined. Pretreatment with auxin eliminated this delay in the appearance of polarity. In hypocotyl segments excised from seedlings with expanding cotyledons, exogenous auxin was unnecessary for polarity. Potassium cyanide abolished polarity at both stages of growth by allowing increased acropetal movement. The rate of accumulation of kinetin in receiver blocks was greater than the in vivo increase in cytokinin content of developing radish roots.

Full text

PDF
348

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Black M. K., Osborne D. J. Polarity of Transport of Benzyladenine, Adenine and Indole-3-acetic Acid in Petiole Segments of Phaseolus vulgaris. Plant Physiol. 1965 Jul;40(4):676–680. doi: 10.1104/pp.40.4.676. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Bonnett H. T., Jr, Torrey J. G. Auxin transport in Convolvulus roots cultured in vitro. Plant Physiol. 1965 Sep;40(5):813–818. doi: 10.1104/pp.40.5.813. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Chang Y. P., Jacobs W. P. The Contrast between Active Transport and Diffusion of Indole-3-acetic Acid in Coleus Petioles. Plant Physiol. 1972 Nov;50(5):635–639. doi: 10.1104/pp.50.5.635. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Kende H. KINETINLIKE FACTORS IN THE ROOT EXUDATE OF SUNFLOWERS. Proc Natl Acad Sci U S A. 1965 Jun;53(6):1302–1307. doi: 10.1073/pnas.53.6.1302. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Kirk S. C., Jacobs W. P. Polar Movement of Indole-3-acetic Acid-C in Roots of Lens and Phaseolus. Plant Physiol. 1968 May;43(5):675–682. doi: 10.1104/pp.43.5.675. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Loomis R. S., Torrey J. G. CHEMICAL CONTROL OF VASCULAR CAMBIUM INITIATION IN ISOLATED RADISH ROOTS. Proc Natl Acad Sci U S A. 1964 Jul;52(1):3–11. doi: 10.1073/pnas.52.1.3. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Seth A. K., Davies C. R., Wareing P. F. Auxin effects on the mobility of kinetin in the plant. Science. 1966 Feb 4;151(3710):587–588. doi: 10.1126/science.151.3710.587. [DOI] [PubMed] [Google Scholar]
  8. Veen H., Jacobs W. P. Movement and metabolism of kinetin-C and of adenine-C in coleus petiole segments of increasing age. Plant Physiol. 1969 Sep;44(9):1277–1284. doi: 10.1104/pp.44.9.1277. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Wilkins M. B., Scott T. K. Auxin transport in roots. Nature. 1968 Sep 28;219(5161):1388–1389. doi: 10.1038/2191388a0. [DOI] [PubMed] [Google Scholar]

Articles from Plant Physiology are provided here courtesy of Oxford University Press

RESOURCES