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- Title
Sphaeralcea A. St.-Hil. (Malvaceae) species.
- Authors
Dunn, Bruce
- Abstract
Mechanical scarification plus stratification was most effective in improving germination of Sphaeralcea ambigua A. Gray and Sphaeralcea coccinea (Nutt.) Rydb. (Malvaceae) in my experiment that compared 4 seed treatments. The pattern of species response to treatments was similar. The control treatment (seeds left at room temperature in original packing envelopes) and the 30-d stratification at 4 °C (39 °F) treatment both yielded low germination (average 1 2%). Mechanical scarification alone improved germination (average 44%); while the combination of mechanical scarification plus 30-d stratification resulted in an average 65% germination (45% and 85% germination for S. ambigua and S. coccinea, respectively). Although impermeability of the seedcoat is the main factor preventing germination, embryos also appear to be partially or conditionally dormant. These treatments may have potential for other Sphaeralcea species.
- Subjects
SCIENTIFIC experimentation; SEED stratification; GLOBEMALLOWS; GERMINATION; PLANT embryology
- Publication
Native Plants Journal (University of Wisconsin Press), 2011, Vol 12, Issue 1, p13
- ISSN
1522-8339
- Publication type
Article
- DOI
10.3368/npj.12.1.13