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. 1988 Apr;86(4):1095–1098. doi: 10.1104/pp.86.4.1095

Cytokinin Fluxes during Floral Induction in the Long Day Plant Sinapis alba L. 1

Pierre Lejeune 1,2, Jean-Marie Kinet 1,2, Georges Bernier 1,2
PMCID: PMC1054633  PMID: 16666037

Abstract

Sinapis alba is a long-day (LD) plant that can be induced to flower by a single LD. A number of changes normally occurring in the meristem of plants subjected to the LD can be produced in short day by a single application of a cytokinin to the apical bud. However, flower buds are not produced indicating that evocation by the cytokinin is only partial. In this work, the cytokinin content of root exudate, obtained under vacuum, and of leaf exudate, obtained by the EDTA-method, has been analyzed comparatively in vegetative and induced plants, using reversed-phase HPLC coupled to the Amaranthus bioassay. The results show that, as early as 16 hours after the start of the LD, there is an increase of cytokinin activity in both the root and leaf exudates of induced plants. These observations fit nicely with previous results obtained on Sinapis, and they indicate that cytokinins are part of the floral stimulus in this species.

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Selected References

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

  1. Bernier G., Kinet J. M., Jacqmard A., Havelange A., Bodson M. Cytokinin as a Possible Component of the Floral Stimulus in Sinapis alba. Plant Physiol. 1977 Aug;60(2):282–285. doi: 10.1104/pp.60.2.282. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Bodson M., Outlaw W. H. Elevation in the Sucrose Content of the Shoot Apical Meristem of Sinapis alba at Floral Evocation. Plant Physiol. 1985 Oct;79(2):420–424. doi: 10.1104/pp.79.2.420. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Cahill D. M., Weste G. M., Grant B. R. Changes in Cytokinin Concentrations in Xylem Extrudate following Infection of Eucalyptus marginata Donn ex Sm with Phytophthora cinnamomi Rands. Plant Physiol. 1986 Aug;81(4):1103–1109. doi: 10.1104/pp.81.4.1103. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Carmi A., Staden J. V. Role of roots in regulating the growth rate and cytokinin content in leaves. Plant Physiol. 1983 Sep;73(1):76–78. doi: 10.1104/pp.73.1.76. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Heindl J. C., Carlson D. R., Brun W. A., Brenner M. L. Ontogenetic variation of four cytokinins in soybean root pressure exudate. Plant Physiol. 1982 Dec;70(6):1619–1625. doi: 10.1104/pp.70.6.1619. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Palmer M. V., Wong O. C. Identification of Cytokinins from Xylem Exudate of Phaseolus vulgaris L. Plant Physiol. 1985 Sep;79(1):296–298. doi: 10.1104/pp.79.1.296. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. van Staden J., Dimalla G. G. Endogenous Cytokinins in Bougainvillea ;San Diego Red': I. OCCURRENCE OF CYTOKININ GLUCOSIDES IN THE ROOT SAP. Plant Physiol. 1980 May;65(5):852–854. doi: 10.1104/pp.65.5.852. [DOI] [PMC free article] [PubMed] [Google Scholar]

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