Seed Information Database

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Storage Behaviour  1000 Seed Weight  Seed Dispersal  Germination  Literature Cited

APG Clade: EUDICOTS - CORE EUDICOTS - ASTERIDS - EUASTERIDS II
APG Order: Asterales
APG Family: ASTERACEAE
Kew Family: COMPOSITAE
Genus: Tragopogon
Species Epithet: porrifolius
Species Author: L.


Storage Behaviour

Storage Behaviour: Orthodox
Storage Conditions: 13% germination following 15 years open storage in a warehouse (Stevens et al., 1981); p50= 2.6 years for seeds stored under open storage in a temperate climate (Priestley, 1986); long-term storage underIPGRI preferred conditions at RBG Kew, WP. Oldest collection 13 years; germination change 100 to 100%, 12 years, 1 collection

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1000 Seed Weight

Average 1000 Seed Weight(g): 13.3
Details of Component Seed Weights:
  1. 10.5936; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
  2. 15.0; (Cromarty et al., 1982); Seed; Seed mc not stated, but weight is likely to refer to air-dry seed.
  3. 15.1; (Felfoldi, 1980); Seed; Seed mc not stated, but weight is likely to refer to air-dry seed.
  4. 43.0; (Barclay & Earle, 1974); Seed; Seed mc not stated, but weight is likely to refer to air-dry seed.
  5. 10.083; (Mazer, 1989); Seed
  6. 10.3; (Fenner, 1983); Seed; Based upon the average weight of 100 air-dry seeds.
  7. 5.095; (Baker Seed Herbarium, California); Seed; Seed mc not stated, but weight is likely to refer to air-dry seed.
  8. 8.89; (Matlack, 1987); Achene; Based on mean weight of 30 "heavy" diaspores; seed mc not stated, but weight is likely to refer to air-dry diaspores.
  9. 7.05; (Matlack, 1987); Achene; Based on mean weight of 30 "light" diaspores; seed mc not stated, but weight is likely to refer to air-dry diaspores.
  10. 9.96; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
  11. 10.9488; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
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Seed Dispersal

  1. Wind; Diaspore is blown by wind; Method not stated; (Matlack, 1987); Diaspore=achene+pappus.
  2. Wind; Diaspore is blown by wind; Assumption based upon diaspore morphology; (Burrows, 1986); The seed is plumed.
  3. Wind; Diaspore is blown by wind; Assumption based upon diaspore morphology; (McIntyre et al., 1995)
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Germination

  1. 98 % germination (seeds sown: 50); germination medium: 1% agar; germination conditions: light 12/12; 10C; 49 days; (RBG Kew, Wakehurst Place)
  2. 92 % germination (seeds sown: 50); germination medium: 1% agar; germination conditions: light 12/12; 15C; 42 days; (RBG Kew, Wakehurst Place)
  3. 100 % germination (seeds sown: 50); germination medium: 1% agar; germination conditions: light 12/12; 15/5C (Therm 12/12); 14 days; (RBG Kew, Wakehurst Place)
  4. 100 % germination (seeds sown: 100); germination medium: 1% agar; germination conditions: light 12/12; 11C; (RBG Kew, Wakehurst Place)
  5. 100 % germination (seeds sown: 20); germination medium: 1% agar; germination conditions: light 8/16; 10C; 7 days; (RBG Kew, Wakehurst Place)
  6. 100 % germination (seeds sown: 20); germination medium: 1% agar; germination conditions: light 8/16; 15C; 7 days; (RBG Kew, Wakehurst Place)
  7. 100 % germination (seeds sown: 50); germination medium: 1% agar; germination conditions: light 12/12; 5C; 77 days; (RBG Kew, Wakehurst Place)
  8. 100 % germination (seeds sown: 10); germination medium: 1% agar; germination conditions: light 12/12; 11C; (RBG Kew, Wakehurst Place)
  9. 85 % germination (seeds sown: 20); germination medium: 1% agar; germination conditions: light 8/16; 25C; 49 days; (RBG Kew, Wakehurst Place)
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Literature Cited
  1. Cromarty, A.S., Ellis, R.H. and Roberts, E.H. 1982. The Design of Seed Storage Facilities for Genetic Conservation. Rome: International Board for Plant Genetic Resources.
  2. Stevens, R., Jorgensen, K.R. and Davis, J.N. 1981. Viability of seed from thirty-two shrub and forb species through fifteen years of warehouse storage. Great Basin Naturalist, 41:274-277.
  3. Felfoldi, E. 1980. Seed Counts (Numbers of Seeds Per Unit Weight). Technical Report Series, 32. Government of Victoria, Department of Agriculture.
  4. Barclay, A.S. and Earle, F.R. 1974. Chemical analyses of seeds III: oil and protein content of 1253 species. Economic Botany, 28:178-236.
  5. Mazer, S. 1989. Ecological, taxonomic, and life history correlates of seed mass among Indiana dunes Angiosperms. Supplement: species list, untransformed seed mass, seed mass class and ecological data associated with each species. Ecological Monographs, 59.
  6. Fenner, M. 1983. Relationships between seed weight, ash content and seedling growth in twenty-four species of Compositae. New Phytologist, 95:697-706.
  7. RBG Kew, Wakehurst Place.
  8. Baker Seed Herbarium, California.
  9. Matlack, G.R. 1987. Diaspore size, shape, and fall behavior in wind-dispersed plant species. American Journal of Botany, 74:1150-1160.
  10. Burrows, F.M. 1986. The aerial motion of seeds, fruits, spores and pollen. In: Seed Dispersal (Ed. by D.R. Murray), pp. 1-47. Academic Press, Australia.
  11. McIntyre, S., Lavorel, S. and Tremont, R.M. 1995. Plant life-history attributes: their relationship to disturbance response in herbaceous vegetation. Journal of Ecology, 83:31-44.
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