Does ethylene play a role in thidiazuron-regulated somatic embryogenesis of geranium (Pelargonium × hortorum bailey) hypocotyl cultures? View Full Text


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Article Info

DATE

1997-04

AUTHORS

M. J. Hutchinson, D. Murr, S. Krishnaraj, T. Senaratna, P. K. Saxena

ABSTRACT

The accumulation of ethylene in headspace of hypocotyl cultures of geranium (Pelargonium × hortorum Bailey) and its possible role in thidiazuron-mediated somatic embryogenesis was investigated. The action of ethylene as determined by various ethylene synthesis and action inhibitors was varied. Silver nitrate (AgNo3), aminoethoxyvinylglycine (AVG), and silver thiosulphate (STS) had no significant influence on the embryogenic response, while 1-methylcyclopropene (1-MCP) applied during the initial 3 d of induction or the expression phase, significantly increased the number of somatic embryos formed. Thidiazuron-treated tissues accumulated large quantities of ethylene within 6 h of culture, but the levels decreased after 12 h and reached very low levels after 3 d in culture. In the presence of acetylsalicylic acid (ASA), the levels of ethylene decreased by 20 to 50% during the first 48 h of culture. Analysis of endogenous auxin, cytokinins, and abscisic acid (ABA) indicated possible interactions of ethylene with other phytohormones during the induction of somatic embryos on geranium hypocotyl explants. Thidiazuron (10 µM) increased, while ASA decreased the levels of endogenous auxin, cytokinins, and abscisic acid during this period of induction. More... »

PAGES

136-141

References to SciGraph publications

  • 1989-08. Enhancement of production and regeneration of embryogenic type II callus in Zea mays L. by AgNO3 in PLANT CELL, TISSUE AND ORGAN CULTURE (PCTOC)
  • 1979-10. Auxin-induced ethylene biosynthesis in subapical stem sections of etiolated seedlings of Pisum sativum L. in PLANTA
  • 1989-03. Effect of 1-Aminocyclopropane-1-carboxylic acid and aminoethoxyvinylglycine on ethylene emanation and somatic embryogenesis from orchardgrass leaf cultures in PLANT CELL REPORTS
  • 1996-03. Acetylsalicylic acid enhances and synchronizes thidiazuron-induced somatic embryogenesis in geranium (Pelargonium x hortorum Bailey) tissue cultures in PLANT CELL REPORTS
  • 1986-04. Salicylic acid: A new inhibitor of ethylene biosynthesis in PLANT CELL REPORTS
  • 1993-01. Somatic embryogenesis in Nicotiana tabacum L.: induction by thidiazuron of direct embryo differentiation from cultured leaf discs in PLANT CELL REPORTS
  • 1991-04. AgNO3 increases type II callus production from immature embryos of maize inbred B73 and its derivatives in PLANT CELL REPORTS
  • 1988-10. Ethylene and in vitro culture of potato: suppression of ethylene generation vastly improves protoplast yield, plating efficiency and transient expression of an alien gene in PLANT CELL REPORTS
  • 1990-07. A dominant mutation inArabidopsis confers resistance to auxin, ethylene and abscisic acid in MOLECULAR GENETICS AND GENOMICS
  • 1990. pH Control of Carrot Somatic Embryogenesis in PROGRESS IN PLANT CELLULAR AND MOLECULAR BIOLOGY
  • 1992-04. The influence of ethylene in plant tissue culture in PLANT GROWTH REGULATION
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    http://scigraph.springernature.com/pub.10.1007/s11627-997-0012-z

    DOI

    http://dx.doi.org/10.1007/s11627-997-0012-z

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