Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Seed persistence of the invasive aquatic plant, Gymnocoronis spilanthoides (Asteraceae)

Seed persistence of the invasive aquatic plant, Gymnocoronis spilanthoides (Asteraceae) Seed persistence of Gymnocoronis spilanthoides (D.Don) DC.; Asteraceae (Senegal tea), a serious weed of freshwater habitats, was examined in relation to burial status and different soil moisture regimes over a 3-year period. Seeds were found to be highly persistent, especially when buried. At the end of the experiment, 42.0%, 27.3% and 61.4% of buried seeds were viable following maintenance at field capacity, water logged and fluctuating (cycles of 1 week at field capacity followed by 3 weeks’ drying down) soil moisture conditions, respectively. Comparable viability values for surface-situated seeds were ~3% over all soil moisture regimes. Predicted times to 1% viability are 16.2 years for buried seed and 3.8 years for surface-situated seed. Persistence was attributed primarily to the absence of light, a near-obligate requirement for germination in this species, although secondary dormancy was induced in some seeds. Previous work has demonstrated low fecundity in field populations of G. spilanthoides , which suggests that soil seed banks may not be particularly large. However, high levels of seed persistence, combined with ostensibly effective dispersal mechanisms, indicate that this weed may prove a difficult target for regional or state-wide eradication. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australian Journal of Botany CSIRO Publishing

Seed persistence of the invasive aquatic plant, Gymnocoronis spilanthoides (Asteraceae)

Panetta F. Dane F.D.
Australian Journal of Botany , Volume 57 (8) – Feb 8, 2010
Download PDF
5 pages

Loading next page...
 
/lp/csiro-publishing/seed-persistence-of-the-invasive-aquatic-plant-gymnocoronis-4jAUheQ1vo

References

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
CSIRO Publishing
Copyright
CSIRO
ISSN
0067-1924
eISSN
1444-9862
DOI
10.1071/BT09187
Publisher site
See Article on Publisher Site

Abstract

Seed persistence of Gymnocoronis spilanthoides (D.Don) DC.; Asteraceae (Senegal tea), a serious weed of freshwater habitats, was examined in relation to burial status and different soil moisture regimes over a 3-year period. Seeds were found to be highly persistent, especially when buried. At the end of the experiment, 42.0%, 27.3% and 61.4% of buried seeds were viable following maintenance at field capacity, water logged and fluctuating (cycles of 1 week at field capacity followed by 3 weeks’ drying down) soil moisture conditions, respectively. Comparable viability values for surface-situated seeds were ~3% over all soil moisture regimes. Predicted times to 1% viability are 16.2 years for buried seed and 3.8 years for surface-situated seed. Persistence was attributed primarily to the absence of light, a near-obligate requirement for germination in this species, although secondary dormancy was induced in some seeds. Previous work has demonstrated low fecundity in field populations of G. spilanthoides , which suggests that soil seed banks may not be particularly large. However, high levels of seed persistence, combined with ostensibly effective dispersal mechanisms, indicate that this weed may prove a difficult target for regional or state-wide eradication.

Journal

Australian Journal of Botany – CSIRO Publishing

Published: Feb 8, 2010

References

  • Assessment of invasive naturalized plants in south-east Queensland.
    Batianoff GN
  • Evaluating the feasibility of eradicating an invasion.
    Cacho OJ
  • Gymnocoronis , a new naturalized genus of Eupatorieae, Asteraceae in China.
    Gao T-G
  • Alien aquatic plants naturalized in Japan: history and present status.
    Kadono Y
  • Seed persistence in the field may be predicted by laboratory-controlled aging.
    Long RL
  • Seed set and germination characteristics of an alien aquatic plant, Gymnocoronis spilanthoides DC.
    Nobuyuki O
  • Evaluation of the performance of weed eradication programs: containment and extirpation.
    Panetta FD
  • Weed eradication: an economic perspective.
    Panetta FD
  • Evaluating the feasibility of eradication for terrestrial weed invasions.
    Panetta FD
  • A different perspective on eradication of vertebrate pests.
    Rainbolt RE
  • Optimal eradication: when to stop looking for an invasive plant?
    Regan TJ
  • Using sighting records to declare eradication of an invasive species.
    Rout TM
  • A comparative study of germination responses to diurnally-fluctuating temperatures.
    Thompson K
  • Seed germination in response to diurnal fluctuations of temperature.
    Thompson K
  • Ecological correlates of seed persistence in soil in the north-west European flora.
    Thompson K
  • Invasion gateways and corridors in the Carpathian Basin: biological invasions in Hungary.
    Török K
  • Fecundity and germination of the invasive aquatic plant, Senegal tea ( Gymnocoronis spilanthoides (D.Don) DC.).
    Vivian-Smith G
  • Dying while dry: kinetics and mechanisms of deterioration in desiccated organisms.
    Walters C