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Storage Behaviour  1000 Seed Weight  Germination  Salt Tolerance  Literature Cited

APG Clade: EUDICOTS - CORE EUDICOTS - ASTERIDS - EUASTERIDS I
APG Order: Solanales
APG Family: CONVOLVULACEAE
Kew Family: CONVOLVULACEAE
Genus: Calystegia
Species Epithet: sepium
Species Author: (L.) R.Br.
Life Form: hemicr.


Storage Behaviour

Storage Behaviour: Orthodox
Storage Conditions: 100 % viability following drying to mc's in equilibrium with 15 % RH and freezing for 1 month at -20C at RBG Kew, WP; The species has been shown to form a long-term persistent soil seed bank, with seeds surviving in the soil for 10 years or longer in at least one investigation (maximum longevity >39 years; Thompson et al., 1997). Survival in ambient conditions for this period of time satisfies the criteria for orthodox behaviour.

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1000 Seed Weight

Average 1000 Seed Weight(g): 28.2
Details of Component Seed Weights:
  1. 21.055; (Baker Seed Herbarium, California); Seed; Seed mc not stated, but weight is likely to refer to air-dry seed.
  2. 30.0; (Baker Seed Herbarium, California); Seed; Seed mc not stated, but weight is likely to refer to air-dry seed.
  3. 25.626; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
  4. 38.0472; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
  5. 29.6; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
  6. 25.31112; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
  7. 28.9884; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
  8. 26.6073491; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
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Germination

  1. 96 % germination (seeds sown: 54); pre-sowing treatments: scarification (seed coat partially removed with scalpel. seed coat chipped); germination medium: 1% agar; germination conditions: light 8/16; 15C; 14 days; (RBG Kew, Wakehurst Place)
  2. 100 % germination (seeds sown: 20); pre-sowing treatments: scarification (seed coat partially removed with scalpel. seed coat chipped); germination medium: 1% agar; germination conditions: light 8/16; 15C; 7 days; (RBG Kew, Wakehurst Place)
  3. 100 % germination (seeds sown: 20); pre-sowing treatments: scarification (seed coat partially removed with scalpel. seed coat chipped); germination medium: 1% agar; germination conditions: light 8/16; 20C; 7 days; (RBG Kew, Wakehurst Place)
  4. 95 % germination (seeds sown: 20); pre-sowing treatments: scarification (seed coat partially removed with scalpel. seed coat chipped); germination medium: 1% agar; germination conditions: light 8/16; 25C; 7 days; (RBG Kew, Wakehurst Place)
  5. 100 % germination (seeds sown: 10); pre-sowing treatments: scarification (seed coat partially removed with scalpel. seed coat chipped); germination medium: 1% agar; germination conditions: light 12/12; 16C; (RBG Kew, Wakehurst Place)
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Salt Tolerance

  1. Plant Type: psamm; Photosynthetic Pathway: C3?
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Literature Cited
  1. Thompson, K., Bakker, J.P. and Bekker, R.M. 1997. The Soil Seed Banks of North West Europe: Methodology, density and Longevity. Cambridge University Press, Cambridge.
  2. RBG Kew, Wakehurst Place.
  3. Baker Seed Herbarium, California.
  4. Barbour, M.G. and Dejong, T.M. 1977. Response of West Coast beach taxa - salt spray, seawater inundation and soil salinity. Bulletin Torrey Botanical Club, 104:29-34.
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