Английская Википедия:Botrychium

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Шаблон:Short description Шаблон:Italic title Шаблон:Automatic taxobox

Botrychium is a genus of ferns, seedless vascular plants in the family Ophioglossaceae.[1] Botrychium species are known as moonworts. They are small, with fleshy roots, and reproduce by spores shed into the air. One part of the leaf, the trophophore, is sterile and fernlike; the other, the sporophore, is fertile and carries the clusters of sporangia or spore cases. Some species only occasionally emerge above ground and gain most of their nourishment from an association with mycorrhizal fungi.

The circumscription of Botrychium is disputed between different authors; some botanists include the genera Botrypus and Sceptridium within Botrychium, while others treat them as distinct. The latter treatment is provisionally followed here.

Taxonomy

Шаблон:Cladogram

Conservation

Moonworts can be found in many environments, including prairies, forests, and mountains. While some Botrychium species are quite rare, conservation efforts can be difficult. Determining the rarity of a species is complicated by the plants’ small leaves, which stand only 2-10 centimeters above the soil.[14] Even more of a challenge in obtaining an accurate population count is the genus’s largely subterranean life cycle. The vast majority of any one population of moonworts actually exists below ground in banks consisting of several types of propagules. One type of propagule is the ungerminated spores, which must percolate through the soil beyond the reach of light in order to germinate. This presumably increases the probability that the spore will be in range of a mycorrhizal symbiont before it produces the tiny, roughly heart-shaped gametophyte, which also exists entirely below ground.[44] Finally, some species produce gemmae, a form of asexual propagation achieved by budding of the root.[14]

Juvenile and dormant sporophytes can also be hidden in the soil for long periods of time. Mature sporophytes do not necessarily produce a leaf annually; they can remain viable underground for up to 10 years without putting up a photosynthetic component. This feat is made possible by their dependence on symbiotic partnership with AM fungi of the genus Glomus, which supply most fixed carbon for growth and reproduction.[45]

This mycorrhizal dependence has also made lab cultivation of moonworts difficult. Thus far, only germination of the gametophyte has been successful.

References

Шаблон:Reflist

External links

Шаблон:Commons category

Шаблон:Plant classification Шаблон:Fern classification Шаблон:Taxonbar Шаблон:Authority control

  1. Шаблон:Cite journal
  2. B. acuminatum Flora of North America, www.eFloras.org 26 Dec 2011
  3. B. alaskense Tropicos.org. Missouri Botanical Garden. 27 Dec 2011
  4. B. alaskense Iowa State Herbarium 27 Dec 2011
  5. B. ascendens Flora of North America, www.eFloras.org 26 Dec 2011
  6. B. boreale Flora of North America, www.eFloras.org 26 Dec 2011
  7. B. campestre Flora of North America, www.eFloras.org 26 Dec 2011
  8. B. campestre Шаблон:Webarchive Robert W. Freckmann Herbarium University of Wisconsin - Stevens Point 27 Dec 2011
  9. B. crenulatum Flora of North America, www.eFloras.org 26 Dec 2011
  10. B. daucifolium Tropicos.org. Missouri Botanical Garden. 27 Dec 2011
  11. B. daucifolium Taiwan Plant Names, www.eFlora.org 27 Dec 2011
  12. B. echo Tropicos.org. Missouri Botanical Garden. 03 Jan 2012
  13. B. echo USDA Forest Service,Rocky Mountain Region, Species Conservation Project July 22, 2004
  14. 14,0 14,1 14,2 14,3 Шаблон:Cite journal
  15. B. gallicomontanum Flora of North America, www.eFloras.org 26 Dec 2011
  16. B. hesperium Flora of North America, www.eFloras.org 26 Dec 2011
  17. B. lanceolatum Flora of North America, www.eFloras.org 26 Dec 2011
  18. B. lineare Шаблон:Webarchive Washington State Department of Natural Resources 26-Dec-2011
  19. Шаблон:PLANTS
  20. B. lunaria Flora of North America, www.eFloras.org 26 Dec 2011
  21. Шаблон:Cite journal
  22. B. matricariifolium Flora of North America, www.eFloras.org 26 Dec 2011
  23. B. minganense Flora of North America, www.eFloras.org 26 Dec 2011
  24. B. montanum Flora of North America, www.eFloras.org 26 Dec 2011
  25. B. mormo Flora of North America, www.eFloras.org 26 Dec 2011
  26. B. neolunaria Iowa State Herbarium 27 Dec 2011
  27. B. pallidum Flora of North America, www.eFloras.org 26 Dec 2011
  28. B. paradoxum Flora of North America, www.eFloras.org 26 Dec 2011
  29. B. pedunculosum Flora of North America, www.eFloras.org 26 Dec 2011
  30. B. pinnatum Flora of North America, www.eFloras.org 26 Dec 2011
  31. B. pseudopinnatum Flora of North America, www.eFloras.org 26 Dec 2011
  32. B. pumicola Tropicos.org. Missouri Botanical Garden. 03 Jan 2012
  33. B. pumicola Oregon.gov ODA Plant Division, Plant Conservation 03 Dec 2012
  34. B. simplex Flora of North America, www.eFloras.org 26 Dec 2011
  35. B. socorrense Tropicos.org. Missouri Botanical Garden. 26 Dec 2011
  36. B. spathulatum Flora of North America, www.eFloras.org 26 Dec 2011
  37. Шаблон:PLANTS
  38. B. tunux Tropicos.org. Missouri Botanical Garden. 26 Dec 2011
  39. B. tunux Iowa State Herbarium 03 Jan 2012
  40. Шаблон:PLANTS
  41. Шаблон:PLANTS
  42. B. yaaxudakeit Tropicos.org. Missouri Botanical Garden. 26 Dec 2011
  43. B. yaaxudakeit Iowa State Herbarium 27 Dec 2011
  44. Шаблон:Cite journal
  45. Шаблон:Cite journal