The influence of plant growth regulators on explant performance, bud break, and shoot growth from large stem segments of Acer saccharinum L

Abstract

Benzyladenine (BA) and/or gibberellic acid (GA3) were applied in 20% white exterior latex paint separately at 0, 0.3, 1, 3, 10, or 30 mM; and at 1, 10, or 30 mM of each plant growth regulator (PGR) in a 3 × 3 factorial to 40 cm long stem segments of Acer saccharinum L. Softwood shoots were forced from these stem segments at various times of the year in a greenhouse and in a laboratory, these resulting shoots were surface disinfested and used as explants in vitro on Driver and Kuniyuki Walnut medium with 0 or 0.01 μM thidiazuron (TDZ). There was some response to the plant growth regulators applied in paint for shoot production from the stem segments and in vitro. Explants from softwood shoots forced from stems painted with 3 mM BA and cultured on medium with 0.01 μM TDZ produced more shoots than explants taken from softwood shoots forced with other BA concentrations or controls. Callus also grew significantly more on explants from stems treated with 3 mM BA cultured on 0.01 μM TDZ than explants harvested from stems painted with other concentrations of BA excluding 10 mM BA. When stem segments treated with BA plus GA3 were compared as a group to controls, more and longer softwood shoots grew on the stems painted with PGRs when all four runs were pooled (Sept. 2005 through Feb. 2006). Application of PGRs in paint extends the season of production of softwood shoots that may be used as explant materials and their subsequent performance in vitro.

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Fig. 1

Abbreviations

BA:

Benzyladenine

DKW:

Driver and Kuniyuki Walnut nutrient salt formulation

GA3 :

Gibberellic acid

PGR:

Plant growth regulator

TDZ:

Thidiazuron, N-phenyl-N′-1,2,3-thiadiazol-5-yl urea

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Correspondence to John E. Preece.

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Mansouri, K., Preece, J.E. The influence of plant growth regulators on explant performance, bud break, and shoot growth from large stem segments of Acer saccharinum L. Plant Cell Tiss Organ Cult 99, 313 (2009). https://doi.org/10.1007/s11240-009-9606-y

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Keywords

  • Benzyladenine (BA)
  • Gibberellic acid (GA3)
  • Epicormic shoots
  • In vitro
  • Silver maple
  • Shoot forcing