Brasenia

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Brasenia
BraseniaAlt.jpg
Status TNC G5.svg
Secure  (NatureServe) [2]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Order: Nymphaeales
Family: Cabombaceae
Genus: Brasenia
Schreb.
Species:
B. schreberi
Binomial name
Brasenia schreberi
Synonyms [3]
  • BarteriaWelw.
  • Brasenia hydropeltisMuhl.
  • Brasenia nymphoidesBaill.
  • Brasenia purpurea(Michx.) Casp.
  • Brasenia peltaCasp.

Brasenia is a genus belonging to the family Cabombaceae, consisting of one species, Brasenia schreberi, commonly known as watershield. It is widely distributed in North America, the West Indies, northern South America (Venezuela, Guyana), eastern Asia (China, Japan, Korea, Primorye), Australia, the Indian Subcontinent, and parts of Africa. [3] [4] [5] [6] [7] [8] [9]

Contents

For sale in a Japanese supermarket, 2014 Junsai-asaproductinastore-march16-2014.jpg
For sale in a Japanese supermarket, 2014

Brasenia is a perennial aquatic plant with floating, peltate leaves and rhizomatous stems. It is identified by its bright green leaves, small purple flowers that bloom from June through September, and a thick mucilage that covers all of the underwater organs, including the underside of the leaves, stems, and developing buds. This mucilage may be an anti-herbivore defence trait, [10] perhaps to deter snail grazing. It grows in shallow water of lakes, rivers and beaver ponds, particularly those with somewhat acidic water.

Junsai with visible mucilage. Junsai held above Soup.jpg
Junsai with visible mucilage.

Characteristics

Ponds along Attikamek Trail at Sault Ste. Marie Canal Ponds along Attikamek Trail at Sault Ste. Marie Canal NHS.JPG
Ponds along Attikamek Trail at Sault Ste. Marie Canal

Brasenia exhibits wind pollination. The flowers have a two-day blooming period. On the first day, the functionally female, or pistillate flower, extends above the surface of the water and exposes the receptive stigmas. The flower then recedes below the water surface and on the following day emerges as a functionally male, or staminate flower. It is elevated higher than on the previous day and the anther-bearing filaments are extended beyond the female carpels. [11] The anthers dehisce, releasing the pollen, and the flower is then withdrawn below the water where the fruit develops.

Cytology

The chloroplast genome is 158951 bp long. [12] The mitochondrial genome is composed of six parts ranging from 110220 bp to 628257 bp in size. The complete mitogenome is 1.49 Mb long. [13] The nuclear genome is 1170.4 Mb long. [14]

Uses

Brasenia is cultivated as a vegetable in China (where it is known as chúncài 莼菜 ) and where it is used in Hangzhou in the well-known local speciality "West Lake Water Shield Soup" [15] and in Japan.

The mucilage it produces has been found to have anti-algal and anti-bacterial properties that may be useful as a natural weed control. [16]

History

Species of Brasenia occurred during the interglacial of Europe, but like many other aquatic plant species and genera, it does not occur there now. [17]

Name

Brasenia schreberi has the common name watershield. [2]

The genus may commemorate the surgeon and Moravian missionary Christoph Brasen (1738-1774), who was the first superintendent of the Moravian mission at Nain in Labrador. [18]

Conservation

It is classified as least concern (LC) by The IUCN Red List. [1] It is classified as vulnerable (VU) in South Korea. [19] The NatureServe conservation status is G5 Secure. [2] Under the Flora and Fauna Guarantee Act 1988, it is categorised as Critically Endangered (CR). [20]

See also

Related Research Articles

<span class="mw-page-title-main">Nymphaeales</span> Order of flowering plants

The Nymphaeales are an order of flowering plants, consisting of three families of aquatic plants, the Hydatellaceae, the Cabombaceae, and the Nymphaeaceae. It is one of the three orders of basal angiosperms, an early-diverging grade of flowering plants. At least 10 morphological characters unite the Nymphaeales. One of the traits is the absence of a vascular cambium, which is required to produce both xylem (wood) and phloem, which therefore are missing. Molecular synapomorphies are also known.

<span class="mw-page-title-main">Nymphaeaceae</span> Family of plants

Nymphaeaceae is a family of flowering plants, commonly called water lilies. They live as rhizomatous aquatic herbs in temperate and tropical climates around the world. The family contains five genera with about 70 known species. Water lilies are rooted in soil in bodies of water, with leaves and flowers floating on or rising from the surface. Leaves are oval and heart-shaped in Barclaya. Leaves are round, with a radial notch in Nymphaea and Nuphar, but fully circular in Victoria and Euryale.

<span class="mw-page-title-main">Droseraceae</span> Family of carnivorous flowering plants

Droseraceae is a family of carnivorous flowering plants, also known as the sundew family. It consists of approximately 180 species in three extant genera, the vast majority being in the sundew genus Drosera. The family also contains the well-known Venus flytrap and the more obscure waterwheel plant, both of which are the only living species of their respective genera. Representatives of the Droseraceae are found on all continents except Antarctica.

<span class="mw-page-title-main">Cabombaceae</span> Family of flowering plants

The Cabombaceae are a family of aquatic, herbaceous flowering plants. A common name for its species is water shield. The family is recognised as distinct in the Angiosperm Phylogeny Group IV system (2016). The family consists of two genera of aquatic plants, Brasenia and Cabomba, totalling six species.

<i>Ruppia</i> Genus of aquatic plants

Ruppia, also known as the widgeonweeds, ditch grasses or widgeon grass, is the only extant genus in the family Ruppiaceae, with eight known species. These are aquatic plants widespread over much of the world. The genus name honours Heinrich Bernhard Rupp, a German botanist (1688–1719). They are widespread outside of frigid zones and the tropics.

<i>Euryale ferox</i> Species of flowering plant

Euryale ferox, commonly known as prickly waterlily, makhana, or Gorgon plant, is a species of water lily found in southern and eastern Asia, and the only extant member of the genus Euryale. The edible seeds, called fox nuts or makhana, are dried, and eaten predominantly in Asia.

<i>Barclaya</i> Genus of aquatic plants

Barclaya is a genus of six species of flowering plants of the family Nymphaeaceae. Barclaya are aquatic plants native to tropical Asia. The genus was named in honour of the American-born English brewer and patron of science Robert Barclay.

<i>Nuphar lutea</i> Species of flowering plant

Nuphar lutea, the yellow water-lily, brandy-bottle, or spadderdock, is an aquatic plant of the family Nymphaeaceae, native to northern temperate and some subtropical regions of Europe, northwest Africa, and western Asia. This species was used as a food source and in medicinal practices from prehistoric times with potential research and medical applications going forward.

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<i>Nymphaea mexicana</i> Species of aquatic plant

Nymphaea mexicana is a species of aquatic plant that is native to the Southern United States and Mexico as far south as Michoacán. Common names include yellow water lily, Mexican water lily and banana water lily.

<i>Cabomba caroliniana</i> Species of aquatic plant

Cabomba caroliniana, commonly known as Carolina fanwort and various other names, is an aquatic perennial herbaceous plant native to North and South America. Having been a popular aquarium plant, it has been exported around the world, and has become an invasive species in Europe and Australia.

<i>Cabomba furcata</i> Species of aquatic plant

Cabomba furcata is a species of aquatic plant in the water shield family known by the common names red cabomba and forked fanwort. It is native to Central and South America and as far north as Cuba and the tip of Florida. It reaches a maximum height between 30 and 80 centimetres and is up to 8 centimetres (3.1 in) wide. It bears purple flowers.

<i>Nymphaea odorata</i> Species of aquatic plant

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<i>Peltandra virginica</i> Species of aquatic plant

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<i>Cabomba aquatica</i> Species of aquatic plant

Cabomba aquatica is a popular aquarium plant that belongs to the family Cabombaceae and genus Cabomba. It is a perennial aquatic plant that lives in fresh standing water or in lakes and rivers with slight currents.

<i>Thalassia testudinum</i> Species of aquatic plant

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<i>Trithuria inconspicua</i> Species of aquatic plant

Trithuria inconspicua is a small aquatic herb of the family Hydatellaceae that is only found in New Zealand.

<i>Cabomba schwartzii</i> Species of aquatic plant

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References

  1. 1 2 Maiz-Tome, L. (2016). Brasenia schreberi. The IUCN Red List of Threatened Species 2016: e.T185681A78457027. https://dx.doi.org/10.2305/IUCN.UK.2016-1.RLTS.T185681A78457027.en. Downloaded on 14 July 2018.
  2. 1 2 3 Brasenia schreberi. (n.d.). NatureServe. Retrieved December 7, 2024, from https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.130243/Brasenia_schreberi
  3. 1 2 Kew World Checklist of Selected Plant Families
  4. Biota of North America Program, 2013 county distribution map
  5. Flora of China Vol. 6 Page 119, 莼菜属 chun cai shu, Brasenia Schreber, Gen. Pl. 1: 372. 1789.
  6. Iwatsuki, K., Boufford, D.E. & Ohba, H. (eds.) (2006). Flora of Japan IIa: 1-550. Kodansha Ltd., Tokyo.
  7. Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
  8. Figueiredo, E. & Smith, G.F. (2008). Plants of Angola. Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  9. Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies. Smithsonian Contributions to Botany 98: 1-1192.
  10. Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. Figure 6.9
  11. Taylor,Mackenzie L. and Jeffrey M. Osborn. 2006. Pollen ontogeny in Brasenia (Cabombaceae, Nymphaeales). American Journal of Botany 93: 344-356
  12. Gruenstaeudl, M., Nauheimer, L., & Borsch, T. (2017). Plastid genome structure and phylogenomics of Nymphaeales: conserved gene order and new insights into relationships. Plant systematics and evolution, 303, 1251-1270.
  13. Shan, Y., Li, J., Duan, X., Zhang, X., & Yu, J. (2024). Elucidating the multichromosomal structure within the Brasenia schreberi mitochondrial genome through assembly and analysis. BMC genomics, 25(1), 422.
  14. Lu, B., Shi, T., & Chen, J. (2023). Chromosome-level genome assembly of watershield (Brasenia schreberi). Scientific Data, 10(1), 467.
  15. "Hangzhou Cuisine". Archived from the original on 2014-08-21. Retrieved 22 April 2014.
  16. Elakovich, Stella D.; Wooten, Jean W. (September 1987). "An examination of the phytotoxicity of the water shield,Brasenia schreberi". Journal of Chemical Ecology. 13 (9): 1935–1940. Bibcode:1987JCEco..13.1935E. doi:10.1007/BF01014676. ISSN   0098-0331. PMID   24302458. S2CID   37729620.
  17. Sculthorpe, C. D. 1967. The Biology of Aquatic Vascular Plants. Reprinted 1985 Edward Arnold, by London. p. 404.
  18. Pringle, James S. Possible eponymy of the generic name Brasenia Schreb. in Sida. vol. 16. no. 3. pp. 597-600. 1995.
  19. Kim, S. B. (Ed.). (2014). Korean red list of threatened species. National Institute of Biological Resources.
  20. Royal Botanic Gardens Victoria. (n.d.-a). Brasenia schreberi J.F.Gmel. VicFlora Flora of Victoria. Retrieved December 7, 2024, from https://vicflora.rbg.vic.gov.au/flora/taxon/6d16f9c6-4db0-42a7-a4ab-595ec6116c4e