Capsella bursa-pastoris
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| Shepherd's Purse | ||||||||||||||
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 Capsella bursa-pastoris plants
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| Capsella bursa-pastoris (L.) Medik. |
Capsella bursa-pastoris, known by its common name shepherd's-purse because of its triangular, purse-like pods, is a small (up to 0.5m) annual and ruderal species, and a member of the Brassicaceae or mustard family. C. bursa-pastoris is native to eastern Europe and Asia minor[1] but is naturalized and considered a common weed in many parts of the world, especially in colder climates,[2] including Britain, where it is regarded as an archaeophyte,[3][4] North America[5][6] and China[7] but also in the Mediterranean and North Africa.[1] Capsella bursa-pastoris is closely related to the model organism Arabidopsis thaliana and is also used as a model organism due to the variety of genes expressed throughout its life cycle that can be compared to genes that are well studied in A. thaliana. Unlike most flowering plants, it flowers almost all year round.[6] [7] Like many other annual ruderals exploiting disturbed ground, C. bursa-pastoris reproduces entirely from seed, has a long soil seed bank,[3] and short generation time[1] and is capable of producing several generations each year.
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[edit] Seeds
Like a number of other plants in several plant families, its seeds contain a substance known as mucilage, a condition known as myxospermy.[8] The adaptive value of myxospermy is unknown,[8] although the fact that mucilage becomes sticky when wet has led some to propose that C. bursa-pastoris traps insects which then provide nutrients to the seedling, which would make it protocarnivorous.[9]
[edit] Uses
C. bursa-pastoris is gathered from the wild[10] or grown[11] for food[11][7] to supplement animal feed,[10] for cosmetics,[10] and for medicinal purposes.[7][10]
[edit] Parasites
- White rust Albugo candida
[edit] References
- ^ a b c Aksoy A, Dixon JM and Hale WH (1998) Biological flora of the British Isles. Capsella bursa-pastoris (L.) Medikus (Thlaspi bursapastoris L., Bursa bursa-pastoris (L.) Shull, Bursa pastoris (L.) Weber). Journal of Ecology 86: 171-186
- ^ "Capsella bursa-pastoris". Flora of Pakistan.
- ^ a b Preston CD, Pearman DA & Dines TD (2002) New Atlas of the British Flora. Oxford University Press
- ^ Preston CD, Pearman DA & Hall AR(2004) Archaeophytes in Britain. Botanical Journal of the Linnaean Society 145, 257-294
- ^ USDA PLANTS Profile: Capsella bursa-pastoris (L.) Medik
- ^ a b Blanchan, Neltje (2005). Wild Flowers Worth Knowing. Project Gutenberg Literary Archive Foundation.
- ^ a b c d "Capsella bursa-pastoris". Flora of China.
- ^ a b Tamara L. Western, Debra J. Skinner, and George W. Haughn (February 2000). "Differentiation of Mucilage Secretory Cells of the Arabidopsis Seed Coat". Plant Physiology 122: 345–355. doi:. PMID 10677428.
- ^ Barber, J.T. (1978). "Capsella bursa-pastoris seeds: Are they "carnivorous"?". Carnivorous Plant Newsletter 7 (2): 39–42.
- ^ a b c d "Capsella bursa-pastoris (Ecocrop code 4164)". ecocrop. Food and Agriculture Organization of the United Nations.
- ^ a b "Capsella bursa-pastoris - (L.)Medik.". Plants For A Future database report.
[edit] See also
[edit] External links
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