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Storage Behaviour  1000 Seed Weight  Oil Content  Protein Content  Seed Dispersal  Germination  Morphology  Literature Cited

APG Clade: EUDICOTS - CORE EUDICOTS - ASTERIDS - EUASTERIDS I
APG Order: Solanales
APG Family: CONVOLVULACEAE
Kew Family: CONVOLVULACEAE
Genus: Ipomoea
Species Epithet: purpurea
Species Author: (L.) Roth
Synonymns: Pharbitis purpurea Voigt.
Life Form: ther.


Storage Behaviour

Storage Behaviour: Orthodox
Storage Conditions: Seeds maintained for 3-4 years in commercial storage conditions (Priestley, 1986); no problem for long-term storage under IPGRI preferred conditions (SSLR)

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1000 Seed Weight

Average 1000 Seed Weight(g): 27.5
Details of Component Seed Weights:
  1. 40.0; (Felfoldi, 1980); Seed; Seed mc not stated, but weight is likely to refer to air-dry seed.
  2. 32.2; (Earle & Jones, 1962); Seed; Seed mc not stated, but weight is likely to refer to air-dry seed.
  3. 16.4510791; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
  4. 21.8268; (RBG Kew, Wakehurst Place); Seed; *Seed weights reported may include minor covering structures
  5. 26.8; (Csonthos et al., 2007); Seed including 'dispersal structures'; Seed mc not stated.
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Seed Dispersal

  1. Unassisted; Seeds drop to the ground close to or beneath the parent plant; Direct or experimental observation; (Vazquez & Givnish, 1998)
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Germination

  1. 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)
  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; 25C; 7 days; (RBG Kew, Wakehurst Place)
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Oil Content

Average of Oil Content (%): 11.3
Details of Component Oil Contents:
  1. 11.3; (Earle & Jones, 1962); Entire seed/nut; Moisture content not stated
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Protein Content

Average of Protein Content (%): 22.3
Details of Component Protein Contents:
  1. 22.3; (Earle & Jones, 1962); Entire seed/nut; Moisture content not stated
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Seed Morphology

(Khalik, K.A. & Osman, A.K. 2007. Seed morphology of some species of Convolvulaceae from Egypt (Identication of species and systematic significance). Feddes Repertorium, 1-224-37.)

Fruit:

Fruit dehiscent: No

Seed:


Seed size length (mm): 4-6
Seed size width (mm): 3-4
Seed colour: black
Seed shape: ovoid with 2 flat ventral faces and one convex dorsal face
Seed surface: glabrous

Internal Morphology:


Endosperm ruminate: No


Literature Cited
  1. Priestley, D.A. 1986. Seed Aging. Cornell University Press.
  2. Felfoldi, E. 1980. Seed Counts (Numbers of Seeds Per Unit Weight). Technical Report Series, 32. Government of Victoria, Department of Agriculture.
  3. Earle, F.R. and Jones, Q. 1962. Analyses of seed samples from 113 plant families. Economic Botany, 16:221-250.
  4. RBG Kew, Wakehurst Place.
  5. Vazquez, J.A. and Givnish, T.J. 1998. Altitudinal gradients in tropical forest composition, structure, and diversity in the Sierra de Manantlan. Journal of Ecology, 86:999-1020.
  6. Khalik, K.A. & Osman, A.K. 2007. Seed morphology of some species of Convolvulaceae from Egypt (Identication of species and systematic significance). Feddes Repertorium, 1-224-37.
  7. Csonthos, P., Tamas, J., & Balogh, L. 2007. Thousand-seed weight records of species from the flora of Hungary, II. Dicotyledonopsida. Studia bot.hung., 38:179-189.
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