NATIONAL ACADEMY OF SCIENCES OF UKRAINE
State Museum of Natural History
Biodiversity Data Centre

Arabidopsis thaliana (L.) Heynh.

Synonym
  • Arabis thaliana L.
  • Sisymbrium thalianum (L.) J. Gay
  • Stenophragma thalianum (L.) Čelak.
  • Arabidopsis thaliana var. apetala O. E. Schulz
Vernacular Name
Thale Cress, Mouse-ear Cress, Arabidopsis
Images
Conservation status
No status defined
Value of species
Remarks
Detail
Occurrence: AE, Al, Ar, Au(A), Be(B, L), BH, Bl(M, N), Br, Bu, By, dCa(C, G, H, P, T), Cg, Co, Cr, Cs, Ct, Da, Es, Fe, Ga(F), Gr, Hb(E), He, Ho, Hs(A, S), Hu, It, La, Li, LS, Lt, Lu, Ma, Md(D, M), Mk, Mo, No, Po, Rf, Rm, Sa, Si(M, S), Sl, Sr, Su, Tu(A, E), Uk(K, U), [Az(M, P, T), Ge] (EuroMed, 2018). A small flowering plant native to Eurasia and Africa. A. thaliana is considered a weed; it is found by roadsides and in disturbed land. A winter annual with a relatively short life cycle, A. thaliana is a popular model organism in plant biology and genetics. For a complex multicellular eukaryote, A. thaliana has a relatively small genome of approximately 135 megabase pairs (Mbp). It was the first plant to have its genome sequenced, and is a popular tool for understanding the molecular biology of many plant traits, including flower development and light sensing. Arabidopsis thaliana is an annual (rarely biennial) plant, usually growing to 20–25 cm tall. The leaves form a rosette at the base of the plant, with a few leaves also on the flowering stem. The basal leaves are green to slightly purplish in color, 1.5–5 cm long and 2–10 mm broad, with an entire to coarsely serrated margin; the stem leaves are smaller and unstalked, usually with an entire margin. Leaves are covered with small, unicellular hairs (called trichomes). The flowers are 3 mm in diameter, arranged in a corymb; their structure is that of the typical Brassicaceae. The fruit is a siliqua 5–20 mm long, containing 20–30 seeds. Roots are simple in structure, with a single primary root that grows vertically downward, later producing smaller lateral roots. These roots form interactions with rhizosphere bacteria such as Bacillus megaterium. A. thaliana can complete its entire lifecycle in six weeks. The central stem that produces flowers grows after about three weeks, and the flowers naturally self-pollinate. In the lab, A. thaliana may be grown in Petri plates, pots, or hydroponics, under fluorescent lights or in a greenhouse. The plant was first described in 1577 in the Harz Mountains by Johannes Thal (de) (1542–1583), a physician from Nordhausen, Thüringen, Germany, who called it Pilosella siliquosa. In 1753, Carl Linnaeus renamed the plant Arabis thaliana in honor of Thal. In 1842, the German botanist Gustav Heynhold erected the new genus Arabidopsis and placed the plant in that genus. The genus name, Arabidopsis, comes from Greek, meaning "resembling Arabis" (the genus in which Linnaeus had initially placed it). Thousands of natural inbred accessions of A. thaliana have been collected from throughout its natural and introduced range. These accessions exhibit considerable genetic and phenotypic variation which can be used to study the adaptation of this species to different environments. A. thaliana is native to Europe, Asia, Africa. It also appears to be native in tropical afroalpine ecosystems. It has been introduced and naturalized worldwide. A. thaliana readily grows and often pioneers rocky, sandy and calcareous soils. It is generally considered a weed, due to its widespread distribution in agricultural fields, roadside, railway lines, waste ground and other disturbed habitat. Like most Brassicaceae species, A. thaliana is edible by humans as a salad or cooked, but it does not enjoy a widespread use as a spring vegetable.
Book reference
  • Кузярін О.Т. Судинні рослини території торфовища "Білогорща” (м. Львів) // Наукові основи збереження біотичної різноманітності. - 2010. - Т.1(8), №1. - С.75-90.
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Experts
  • Alexander KUZYARIN, Dr, e-mail: kuzyarin@gmail.com

Taxonomic branch

Biota
Eukaryota
Plantae
Viridiplantae
Tracheophyta
Euphyllophytina
Magnoliopsida
Brassicales
Brassicaceae
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