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Research ArticleRefereed Research

Propagation of the northern Gulf of Mexico coastal dune endemic Crocanthemum arenicola (coastalsand frostweed)

Gabriel Campbell-Martínez, Anna Dicks, Barbara Cory, Mack Thetford and Deborah Miller
Native Plants Journal, June 2021, 22 (2) 133-140; DOI: https://doi.org/10.3368/npj.22.2.133
Gabriel Campbell-Martínez
University of Florida, West Florida Research and, Education Center, 5988 Highway 90, Building 4900, Milton, FL 32583
Roles: Graduate Research Assistant
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  • For correspondence: [email protected]
Anna Dicks
University of Florida, West Florida Research and, Education Center, 5988 Highway 90, Building 4900, Milton, FL 32583
Roles: Undergraduate Research Assistant
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  • For correspondence: [email protected]
Barbara Cory
University of Florida, West Florida Research and, Education Center, 5988 Highway 90, Building 4900, Milton, FL 32583
Roles: Undergraduate Research Assistant
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  • For correspondence: [email protected]
Mack Thetford
University of Florida, West Florida Research and, Education Center, 5988 Highway 90, Building 4900, Milton, FL 32583
Roles: Associate Professor
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Deborah Miller
University of Florida, West Florida Research and, Education Center, 5988 Highway 90, Building 4900, Milton, FL 32583
Roles: Professor
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Abstract

Coastalsand frostweed (Crocanthemum arenicola (Chapm.) Barnhart [Cistaceae]) is a back dune plant of the north central Gulf of Mexico endemic to coastal Florida, Alabama, and Mississippi. We initiated seed and cutting propagation experiments to test the effects of scarification, photoperiod, and temperature on germination of C. arenicola. In addition, we examined the effects of cutting maturity (vegetative or reproductive stems), auxin (IBA) concentration, and time of rooting on the percentage of cuttings with roots and the quality of rooted cuttings of C. arenicola. We conducted 3 single-factor experiments in which seeds were subjected to scarification treatments, photoperiod treatments, or a gradient of temperature treatments, and germination (radicle emergence) was monitored over time (2–4 wk). A two-factor greenhouse cutting experiment was conducted comparing cutting maturity and auxin concentration on root number and root length of C. arenicola 3 and 7 wk after sticking. We assessed cuttings for root class at 7 wk. Scarification by sandpaper abrasion (50–200 s) increased germination compared to a non-scarified control (≥90% compared to 11% germination). Photoperiod had no effect on germination, with similar germination in the light and dark. Higher germination occurred under cooler temperatures than warmer temperatures. Rooting at 3 wk (51%) was lower compared to rooting at 7 wk (76%). More roots were present on vegetative cuttings compared to reproductive cuttings (4.2 compared to 2.7 roots per cutting). Root length and root class did not differ with the application of auxin.

KEY WORDS
  • coastal restoration
  • germination
  • physical dormancy
  • seed scarification
  • photoperiod
  • cutting propagation
  • Cistaceae
NOMENCLATURE
  • Hassler (2020)
  • USDA NRCS (2020)
  • Wunderlin and others (2020)
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Native Plants Journal: 22 (2)
Native Plants Journal
Vol. 22, Issue 2
20 Jun 2021
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Propagation of the northern Gulf of Mexico coastal dune endemic Crocanthemum arenicola (coastalsand frostweed)
Gabriel Campbell-Martínez, Anna Dicks, Barbara Cory, Mack Thetford, Deborah Miller
Native Plants Journal Jun 2021, 22 (2) 133-140; DOI: 10.3368/npj.22.2.133

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Propagation of the northern Gulf of Mexico coastal dune endemic Crocanthemum arenicola (coastalsand frostweed)
Gabriel Campbell-Martínez, Anna Dicks, Barbara Cory, Mack Thetford, Deborah Miller
Native Plants Journal Jun 2021, 22 (2) 133-140; DOI: 10.3368/npj.22.2.133
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Keywords

  • coastal restoration
  • germination
  • physical dormancy
  • seed scarification
  • photoperiod
  • cutting propagation
  • Cistaceae
  • Hassler (2020)
  • USDA NRCS (2020)
  • Wunderlin and others (2020)
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