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Research Article

Preliminary study shows germination of Caribbean applecactus (Harrisia fragrans) improved with acid scarification and gibberellic acid

Bijan Dehgan and Hector E Pérez
Native Plants Journal, March 2005, 6 (1) 91-96; DOI: https://doi.org/10.2979/NPJ.2005.6.1.91
Bijan Dehgan
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Hector E Pérez
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Abstract

To determine germination rate and final germination percentage of the endangered Florida endemic Caribbean applecactus (Harrisia fragrans Small [Cactaceae]), we treated seeds with sulfuric and gibberellic (GA3) acids and germinated them under constant temperature regimes. Temperature effect was marginal at best, with only 2% of seed germinating in 50 d in 25 °C. Although there was improved germination with sulfuric acid (H2SO4) alone, significant increases in both germination rate and germination percentage were realized when seeds were scarified with 18 M H2SO4 for 15,30,and 45 s,followed by soaking in 1000 ppm GA3 for 24 h,with 68% germination in 120 d for the 45 s H2SO4 treatment. Emergence first occurred on day 18 for seed treated with 1000 ppm GA3 but not until day 70 for the 500 ppm treatment. Control seeds failed to emerge during the observation period. These treatments represent a quick method of meeting Species Level Recovery Actions for Harrisia fragrans in the Multi-Species Recovery Plans for South Florida.

  • sulfuric acid scarification
  • conservation horticulture
  • seed propagation
  • dormancy
NOMENCLATURE
  • (North American cacti) USDA NRCS (2004)
  • other cacti as cited

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Native Plants Journal: 6 (1)
Native Plants Journal
Vol. 6, Issue 1
20 Mar 2005
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Preliminary study shows germination of Caribbean applecactus (Harrisia fragrans) improved with acid scarification and gibberellic acid
Bijan Dehgan, Hector E Pérez
Native Plants Journal Mar 2005, 6 (1) 91-96; DOI: 10.2979/NPJ.2005.6.1.91

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Preliminary study shows germination of Caribbean applecactus (Harrisia fragrans) improved with acid scarification and gibberellic acid
Bijan Dehgan, Hector E Pérez
Native Plants Journal Mar 2005, 6 (1) 91-96; DOI: 10.2979/NPJ.2005.6.1.91
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Keywords

  • sulfuric acid scarification
  • conservation horticulture
  • seed propagation
  • dormancy
  • (North American cacti) USDA NRCS (2004)
  • other cacti as cited
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