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Research ArticleREFEREED RESEARCH

Testing germination methods and survival for a rare endemic, Barton’s raspberry (Rubus bartonianus)

Erin C Gray, Matt A Bahm, Roger Ferriel and Thomas N Kaye
Native Plants Journal September 2019, 20 (3) 244-252; DOI: https://doi.org/10.3368/npj.20.3.244
Erin C Gray
, Ecologist, Institute for Applied Ecology, 563 SW Jefferson Avenue, Corvallis, OR 97333,
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  • For correspondence: [email protected]
Matt A Bahm
, Conservation Research Program Director, Institute for Applied Ecology, 563 SW Jefferson Avenue, Corvallis, OR 97333,
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  • For correspondence: [email protected]
Roger Ferriel
, Fire Botanist, retired, Bureau of Land Management, Vale District Baker City, OR 97814
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  • For correspondence: [email protected]
Thomas N Kaye
, Executive Director and Senior Ecologist, Institute for Applied Ecology, 563 SW Jefferson Avenue, Corvallis, OR 97333,
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  • For correspondence: [email protected]
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Abstract

Barton’s raspberry (Rubus bartonianus M. Peck [Rosaceae]) is a narrow endemic of Oregon and Idaho found in the middle sections of Hells Canyon along the Snake River and its tributaries. The global distribution has decreased by approximately 24%, so germination and propagation techniques need to be developed for reintroduction purposes. We test 4 scarification treatments (control/none, mechanical scarification, bleach, sulfuric acid) and 3 cold stratification treatments (60, 90, and 120 d) in combination to determine the most effective method to improve germination and survival of Barton’s raspberry. Germination and survival are relatively high for all treatments, with the exception of mechanical scarification. Most treatments (control, bleach, and sulfuric acid) had > 64% germination after 60 d in cold stratification, whereas the mechanical treatment was 35%. The longer stratification treatments increased germination rates to > 80% for the sulfuric acid treatment and > 73% for the bleach treatment. The control treatment remained > 60% in the longer stratification treatments, whereas the mechanical treatment was < 43%. The high rates of germination for the sulfuric acid and bleach treatments can improve germination and survival when attempting to grow Barton’s raspberry from seed for reintroduction in its historic range.

  • germination
  • propagation
  • shrub
  • seed pre-treatment
  • imbibe
  • warm-stratification
  • cold-moist stratification
  • scarification
  • Rosaceae
NOMENCLATURE:
  • USDA NRCS (2018)
  • © 2019 by the Board of Regents of the University of Wisconsin System

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Native Plants Journal: 20 (3)
Native Plants Journal
Vol. 20, Issue 3
21 Sep 2019
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Testing germination methods and survival for a rare endemic, Barton’s raspberry (Rubus bartonianus)
Erin C Gray, Matt A Bahm, Roger Ferriel, Thomas N Kaye
Native Plants Journal Sep 2019, 20 (3) 244-252; DOI: 10.3368/npj.20.3.244

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Testing germination methods and survival for a rare endemic, Barton’s raspberry (Rubus bartonianus)
Erin C Gray, Matt A Bahm, Roger Ferriel, Thomas N Kaye
Native Plants Journal Sep 2019, 20 (3) 244-252; DOI: 10.3368/npj.20.3.244
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Keywords

  • germination
  • propagation
  • shrub
  • seed pre-treatment
  • imbibe
  • warm-stratification
  • cold-moist stratification
  • scarification
  • Rosaceae
  • USDA NRCS (2018)
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