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OtherDevelopment and Growth Regulation
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Morphoregulatory Role of Thidiazuron

Substitution of Auxin and Cytokinin Requirement for the Induction of Somatic Embryogenesis in Geranium Hypocotyl Cultures

Christena Visser, Javed A. Qureshi, Ravinder Gill, Praveen K. Saxena
Christena Visser
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Javed A. Qureshi
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Ravinder Gill
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Praveen K. Saxena
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Published August 1992. DOI: https://doi.org/10.1104/pp.99.4.1704

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Abstract

Somatic embryogenesis was induced in hypocotyl explants of geranium (Pelargonium × hortorum) cultured on media supplemented with various concentrations of N-phenyl-N′-1,2,3-thiadiazol-5-ylurea (thidiazuron). In less than 2 weeks, somatic embryos were observed in treatments containing levels of thidiazuron (TDZ) ranging from 0.2 to 1.0 micromolar. The use of N6-benzylaminopurine in combination with indole-3-acetic acid also evoked embryogenesis, but the efficiency of somatic embryo production was significantly lower than that obtained with TDZ. Hypocotyl culture for only 2 days on TDZ-supplemented medium before transfer to a basal medium was sufficient for inducing somatic embryogenesis. This distinction between the induction and expression of embryogenesis may provide an experimental system for studying the developmental biology of somatic embryogenesis. Substitution of the auxin-cytokinin requirement for the induction of somatic embryogenesis by TDZ suggests the possibility of a novel mode of its action by modulation of endogenous growth regulators.

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Morphoregulatory Role of Thidiazuron
Christena Visser, Javed A. Qureshi, Ravinder Gill, Praveen K. Saxena
Plant Physiology Aug 1992, 99 (4) 1704-1707; DOI: 10.1104/pp.99.4.1704

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Morphoregulatory Role of Thidiazuron
Christena Visser, Javed A. Qureshi, Ravinder Gill, Praveen K. Saxena
Plant Physiology Aug 1992, 99 (4) 1704-1707; DOI: 10.1104/pp.99.4.1704
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Plant Physiology
Vol. 99, Issue 4
August 1992
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More in this TOC Section

  • The rms1 Mutant of Pea Has Elevated Indole-3-Acetic Acid Levels and Reduced Root-Sap Zeatin Riboside Content but Increased Branching Controlled by Graft-Transmissible Signal(s)
  • Bacterial Cellulose-Binding Domain Modulates in Vitro Elongation of Different Plant Cells
  • Gibberellin Dose-Response Regulation of GA4 Gene Transcript Levels in Arabidopsis
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