Steven M. Kabat’s research while affiliated with University of Florida and other places

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Publications (5)


Temperature and Light Affects Germination Ecology of Commercially Produced Seeds of Leavenworth’s Coreopsis
  • Article

October 2007

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43 Reads

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9 Citations

Native Plants Journal

Steven M. Kabat

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Commercially produced, source identified, natural track seeds of Leavenworth's tickseed (Coreopsis leavenworthii Torr. & Gray [Asteraceae]) harvested in late June expressed a type of physiological dormancy in which seeds became nondormant first at cooler temperatures and then at warmer temperatures. In 2 studies, fresh seeds were buried about 7 cm (3 in) deep in sand in 3.8-l (1-gal) containers, irrigated once per week, and exposed to ambient temperatures. Seeds were excavated monthly during 10 mo in the 2001–2002 study and 9 mo in the 2002–2003 study. Seeds became nondormant in late fall to early winter, approximately 5 to 6 mo after they were buried. Coreopsis leavenworthii showed that it was well-adapted to Florida's climate because its seeds germinated under a wide variety of temperatures typical in Florida during late fall and early winter at shallow seeding depth (light enhanced germination) in sites typical of C. leavenworthii's moist habitat. While C. leavenworthii most closely resembled a facultative winter annual, it also showed the potential to germinate to some degree under temperatures typical of Florida's subtropical summer. No buried seeds germinated, indicating that C. leavenworthii has the potential to form at least a short-term seedbank.


Floristic inventory of the remnant pinelands of the U.S.D.A. Subtropical Horticultural Research Station at Chapman Field, Miami-Dade County, Florida

July 2006

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27 Reads

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3 Citations

Rhodora

A floristic inventory of the remnant pinelands of the U.S.D.A. Subtropical Horticultural Research Station at Chapman Field, Miami-Dade County, Florida was conducted from July 2002 to March 2003. From the two-hectare study site, 159 vascular plant species were documented. These included six ferns and fern allies, two conifers, and 151 angiosperms (representing 49 families and 124 genera). Of the 159 species, 118 are native to North America north of Mexico and 41 are non-native but naturalized. The families with the most species in the study area included Fabaceae (25 spp.), Poaceae (20 spp.), Asteraceae (15 spp.), and Euphorbiaceae (9 spp.). The best-represented genera were Chamaesyce (five spp.), Sida (four spp.), and five genera with three species each: Chamaecrista, Ipomoea, Lantana, Rhynchosia, and Senna. Five species are new records for Miami-Dade County. Ten Florida endemic species, eight Florida threatened species, four Florida endangered species, and one federally listed endangered species were documented.


An inventory of the vascular flora of Morningside Nature Center, Alachua County, Florida

June 2004

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20 Reads

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3 Citations

Rhodora

A floristic inventory of Morningside Nature Center in Alachua County, Florida, was conducted from May 2001 to April 2003. From the 112.5-hectare park, 527 vascular plant species were collected (not including hybrids). These included 9 ferns, 5 conifers, and 513 angiosperms (representing 103 families and 310 genera). Of the 527 species, 456 were native to North America north of Mexico and 71 were non-native but naturalized. Five plant communities are recognized in the park: pine flatwoods, which cover 53.6% of the park; sandhills, which cover 21.5% of the park; ruderal areas, which cover 20.1 % of the park; cypress swamps, which cover 4.4% of the park; and flatwoods depressions, which cover 0.4% of the park. The plant families best represented at Morningside include the Asteraceae with 71 species, Poaceae with 60 species, Fabaceae with 42 species, Cyperaceae with 32 species, Ericaceae with 15 species, Lamiaceae with 15 species, and Euphorbiaceae with 14 species. The largest genera at Morningside include Quercus (11 species and 2 named hybrids), Desmodium (9 spp.), Cyperus and Hypericum (8 spp. each), and Asclepias and Rhynchospora (7 spp. each). Twenty-two species are new records for Alachua County. Nine species growing at Morningside were found to be at or near the northern or southern limits of their range. Finally, six Florida endemics (or near endemics) were found in the park.


Effect of scarification and gibberellic acid treatments on seed- ling emergence of viable Lupinus diffusus seed 33 days after scarification. Each value represents the mean of four 100- seed replications.
Effect of Seed Scarification and Gibberellic Acid Treatment on Seedling Emergence of Sky-Blue Lupine (Lupinus diffusus)
  • Article
  • Full-text available

June 2003

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327 Reads

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17 Citations

Journal of Environmental Horticulture

The efficacy of various scarification treatments and gibberellic acid (GA3) treatment on seedling emergence of Lupinus diffusus Nutt. (sky-blue lupine) was evaluated. Seed scarified in concentrated sulfuric acid for 90 min followed by immersion in water for 24 hr resulted in the best emergence of viable seed (≈ 41%). Mechanical scarification with sandpaper for up to 30 min did not improve seedling emergence. Immersing seed in 90C (194F) water which was then allowed to cool for 24 hr apparently killed or severely injured the embryos as no seedlings emerged from seeds treated with hot water. There was only 5% seedling emergence for nonscarified seed that were soaked in water at room temperature for 24 hr. Emergence was not improved by soaking scarified seed in 1000 mg/liter (ppm) GA3 for 24 hr prior to sowing the seeds.

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Citations (5)


... El almacenaje a condiciones de baja temperatura y baja humedad relativa, así como el protocolo de escarificación utilizado (Ramírez Betancourt, 2019) favorecieron la respuesta de germinación de ambas especies, L. montanus y L. bilineatus. Otros autores reportan porcentajes de germinación menores, Mariel (2006) reporta un 56% de germinación de las semillas de L. montanus con escarificación mecánica, mientras que con tratamientos imbibición en agua caliente en semillas de Lupinus diffusus, los autores refieren daño grave de los embriones, ya que no emergió ninguna plántula (Dehgan et al., 2003). En este trabajo es posible que las diferencias en el porcentaje de germinación se deban a la especie, la edad de las semillas, la susceptibilidad a los desinfectantes utilizados en el proceso de desinfectación, etc. Las semillas de ambas especies fueron caracterizadas físicamente, observándose que ambas presentan testas ornamentadas y de coloración café con manchas oscuras. ...

Reference:

Germination and callus induction for alkaloid production of two Lupinus species under in vitro conditions
Effect of Seed Scarification and Gibberellic Acid Treatment on Seedling Emergence of Sky-Blue Lupine (Lupinus diffusus)

Journal of Environmental Horticulture

... Interestingly, despite the second peak in germination at 5/20 °C in May 2002, speed of germination in light declined at 5/20 °C from January to May (Figure 3). As the temperature regimes increased, this delay in germination gradually abated to the point that at regimes of 15/25 °C and greater, most germination occurred at 7 d in both light and dark (results not shown; Kabat 2004). ...

AN ECOLOGICALLY BASED STUDY OF GERMINATION REQUIREMENTS AND DORMANCIES IN THREE COMMERCIALLY PRODUCED FLORIDA NATIVE WILDFLOWERS
  • Citing Article

... Allison and Stevens 2001; Bailey and Coe 2001; Greller and Clemants 2001;Hoagland and Johnson 2001;Luken and Thieret 2001;Neill and Wilson 2001;Rundell and Woods 2001;Small and McCarthy 2001;Thompson and Jones 2001; Backus et al. 2002; Davis et al. 2002; Denley et al. 2002;Diamond et al. 2002; Fleming et al. 2002; Gulledge and Judd 2002;Leidolf et al. 2002;MacRoberts et al. 2002;Martin et al. 2002;Morgan 2002;Schmidt and Barnwell 2002;Stalter and Lamont 2002;Stalter and Munir 2002;Towne 2002; Barringer and Clemants 2003; Barringer and Pannaman 2003; Diamond 2003; Hellquist and Crow 2003;Klips 2003;Muss et al. 2003;Myers and Wunderlin 2003;Rosen et al. 2003;Singhurst et al. 2003;Steury and Davis 2003; Bjork and Dunwiddie 2004; Crow and Fahey 2004; Dransfield and Woods 2004; Edgin et al. 2004; Feist et al. 2004; Fleming and Wofford 2004;Hoagland et al. 2004aHoagland et al. , 2004bHoagland and Buthod 2004;Hoagland and Johnson 2004;Kabat et al. 2004;Krings and Franks 2004;Stalter and Kincaid 2004;Thompson and Fleming 2004;Warren et al. 2004;Zomlefer et al. 2004 Shelingoski et al. 2005;Stalter and Lamont 2005;Zomlefer and Giannasi 2005; Brown et al. 2006a Brown et al. , 2006b Crandall and Tyrl 2006; Furguson and Wunderlin 2006; Harrelson and Cantino 2006;Kabat et al. 2006;Kelly 2006;Loeb 2006;MacRoberts and MacRoberts 2006;McLaughlin 2006;Owens et al. 2006;Sorrie et al. 2006;Stalter and Lamont 2006;Talbot et al. 2006;Thompson and McKinney 2006;Thompson and Poindexter 2006; Barone and Hill 2007; Beck and Van Horn 2007; DeCandido et al. 2007; Harcombe et al. 2007;Hoagland and Buthod 2007;Majure 2007;Palmer 2007b;Rink and Cully 2007;Rosen 2007;Singhurst et al. 2007;Stalter et al. 2007;Terry and Hayden 2007;Thompson 2007;Zomlefer et al. 2007; Barger and Tenaglia 2008; Brown et al. 2008a Brown et al. , 2008bFeist et al. 2008; ...

An inventory of the vascular flora of Morningside Nature Center, Alachua County, Florida
  • Citing Article
  • June 2004

Rhodora

... One group of native plants frequently used in such plantings in the United States is native wildflowers. Many states have implemented wildflower planting programs for highway beautification and revegetation (Kabat et al., 2007;Texas Department of Transportation, 2011). Planting native wildflowers has resulted in multiple benefits, including increased aesthetic values, enhanced wildlife habitats, and reduced maintenance costs (Bryant and Harper-Lore, 1997). ...

Temperature and Light Affects Germination Ecology of Commercially Produced Seeds of Leavenworth’s Coreopsis
  • Citing Article
  • October 2007

Native Plants Journal

... Allison and Stevens 2001; Bailey and Coe 2001; Greller and Clemants 2001;Hoagland and Johnson 2001;Luken and Thieret 2001;Neill and Wilson 2001;Rundell and Woods 2001;Small and McCarthy 2001;Thompson and Jones 2001; Backus et al. 2002; Davis et al. 2002; Denley et al. 2002;Diamond et al. 2002; Fleming et al. 2002; Gulledge and Judd 2002;Leidolf et al. 2002;MacRoberts et al. 2002;Martin et al. 2002;Morgan 2002;Schmidt and Barnwell 2002;Stalter and Lamont 2002;Stalter and Munir 2002;Towne 2002; Barringer and Clemants 2003; Barringer and Pannaman 2003; Diamond 2003; Hellquist and Crow 2003;Klips 2003;Muss et al. 2003;Myers and Wunderlin 2003;Rosen et al. 2003;Singhurst et al. 2003;Steury and Davis 2003; Bjork and Dunwiddie 2004; Crow and Fahey 2004; Dransfield and Woods 2004; Edgin et al. 2004; Feist et al. 2004; Fleming and Wofford 2004;Hoagland et al. 2004aHoagland et al. , 2004bHoagland and Buthod 2004;Hoagland and Johnson 2004;Kabat et al. 2004;Krings and Franks 2004;Stalter and Kincaid 2004;Thompson and Fleming 2004;Warren et al. 2004;Zomlefer et al. 2004 Shelingoski et al. 2005;Stalter and Lamont 2005;Zomlefer and Giannasi 2005; Brown et al. 2006a Brown et al. , 2006b Crandall and Tyrl 2006; Furguson and Wunderlin 2006; Harrelson and Cantino 2006;Kabat et al. 2006;Kelly 2006;Loeb 2006;MacRoberts and MacRoberts 2006;McLaughlin 2006;Owens et al. 2006;Sorrie et al. 2006;Stalter and Lamont 2006;Talbot et al. 2006;Thompson and McKinney 2006;Thompson and Poindexter 2006; Barone and Hill 2007; Beck and Van Horn 2007; DeCandido et al. 2007; Harcombe et al. 2007;Hoagland and Buthod 2007;Majure 2007;Palmer 2007b;Rink and Cully 2007;Rosen 2007;Singhurst et al. 2007;Stalter et al. 2007;Terry and Hayden 2007;Thompson 2007;Zomlefer et al. 2007; Barger and Tenaglia 2008; Brown et al. 2008a Brown et al. , 2008bFeist et al. 2008; ...

Floristic inventory of the remnant pinelands of the U.S.D.A. Subtropical Horticultural Research Station at Chapman Field, Miami-Dade County, Florida
  • Citing Article
  • July 2006

Rhodora