Marchantia

Marchantia

▪ plant genus
      genus of liverworts (creeping ribbonlike plants) in the order Marchantiales, commonly found on moist clay or silty soils, especially on recently burned land throughout the Northern Hemisphere. Marchantia polymorpha, a well-known species, often is discussed as a representative liverwort in biology textbooks. Dark green Marchantia gametophytes (sexual plants) are branched and ribbonlike, about 1.3 cm (0.5 inch) wide and 5 to 13 cm long. The diamond-shaped markings on their upper surfaces, signs of interior air chambers, have a central pore through which air diffuses.

      Male and female plants have umbrella-like, stalked reproductive structures. The male structures are disk-shaped with scalloped edges; the female structures have nine fingerlike projections. Sperm produced by male plants are splashed by raindrops onto female plants. Sporophytes (asexual plants) develop from fertilized eggs in the female structures. Vegetative reproduction occurs in both male and female plants by means of rounded, fringed gemmae (asexual buds) or by pieces of the plant body that may break off and grow.

* * *


Universalium. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Marchantia — polymorpha Scientific classification Kingdom: Plantae …   Wikipedia

  • marchantia — [ marʃɑ̃tja ] n. f. • 1834; marchante 1819; de Marchant, botaniste fr. ♦ Bot. Plante cryptogame (hépatiques) qui croît dans les endroits humides et tempérés. On dit aussi MARCHANTIE [ marʃɑ̃ti ], 1873 . ● marchantia nom féminin (latin… …   Encyclopédie Universelle

  • Marchantia — prop. n. The type genus of {Marchantiaceae}; liverworts that reproduce asexually by gemmae and have stalked antheridiophores. Syn: genus {Marchantia}. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • Marchantĭa — (M. L., nach Nic. Marchant, Arzt des Herzogs von Orleans, von seinem Sohne Jan Marchant benannt, der als Director des königlichen Gartens 1738 zu Paris starb), Pflanzengattung aus der Familie der Marchantiaceae, 24 Kl. L.; Art: M. polymorpha… …   Pierer's Universal-Lexikon

  • Marchantĭa — L. (Leberkraut), Lebermoosgattung aus der Familie der Marchantiazeen, meist ausdauernde Gewächse mit fleischigem, gabelig verzweigtem Laub, das auf Mauern, Felsen und an feuchten Stellen grüne Decken bildet und mit langen Wurzelhaaren im Boden… …   Meyers Großes Konversations-Lexikon

  • Marchantia — Marchantĭa Raddi, Lebermoosgattg. der Marchantiazeen, mit blattartigem, unregelmäßig gerandetem Thallus. In Deutschland M. polymorpha L. (Leberkraut) [Abb. 1135]), an feuchten Felsen etc.; die Antheridien und Archegonien stehen auf gesonderten… …   Kleines Konversations-Lexikon

  • marchantía — (De marchante). 1. f. Cosa mueble con que se comercia. 2. Am. Cen., P. Rico y Ven. clientela. 3. p. us. Comercio de géneros …   Diccionario de la lengua española

  • marchantía — ► sustantivo femenino América Central, P Rico, Venezuela COMERCIO Clientela, conjunto de clientes habituales de un establecimiento determinado. * * * marchantería o marchantía (de «marchante») f. Mercancía. * * * marchantía. (De marchan …   Enciclopedia Universal

  • Marchantia — noun type genus of Marchantiaceae; liverworts that reproduce asexually by gemmae and have stalked antheridiophores • Syn: ↑genus Marchantia • Hypernyms: ↑moss genus • Member Holonyms: ↑Marchantiaceae, ↑family Marchantiaceae …   Useful english dictionary

  • Marchantia — ID 52000 Symbol Key MARCH Common Name N/A Family Marchantiaceae Category Liverwort Division Hepatophyta US Nativity N/A US/NA Plant Yes State Distribution N/A Growth Habit N/A …   USDA Plant Characteristics

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”