Beta (plant)

Last updated

Beta
Illustration Beta vulgaris var.JPG
Sugarbeet (Beta vulgaris subsp. vulgaris)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Amaranthaceae
Subfamily: Betoideae
Tribe: Beteae
Moq.
Genus: Beta
L.
Type species
Beta vulgaris
L.
Species

See text

Sea beet (Beta vulgaris subsp. maritima) Beta vulgaris subsp maritima 89-08.JPG
Sea beet (Beta vulgaris subsp. maritima)

Beta is a genus in the flowering plant family Amaranthaceae. The best known member is the common beet, Beta vulgaris , but several other species are recognised. Almost all have common names containing the word "beet". Wild Beta species can be found throughout the Atlantic coast of Europe, the Mediterranean coastline, the Near East, and parts of Asia including India.

Contents

Description

This genus consists of annual, biennial, or perennial species, often with fleshy, thickened roots. The stems grow erect or procumbent. The alternate leaves are petiolate or sessile, with ovate-cordate to rhombic-cuneate leaf blades, their margins mostly entire, with obtuse apex. [1]

The inflorescences are long spikelike cymes or glomerules. Bracts can be leaflike (Beta macrorhiza) or very small, the upper half of the inflorescence often without bracts. The bisexual flowers consist of (3-) 5 basally connate perianth segments (either greenish, dorsally ridged and with hooded tips, or petaloid and whitish, yellowish, reddish, or greenish), [2] 5 stamens, and a semi-inferior ovary with 2-3 (-5) stigmas. [1]

The fruit (utricle) is immersed in the swollen, hardened perianth base. The fruit is indehiscent or dehiscence eventually circumscissile. [3] The horizontal seed is orbicular or reniform, with dark brown, smooth or glossy seed coat. The seed contains an annular embryo and copious perisperm. [1]

The base chromosome number is x = 9. [1]

Systematics and distribution

The genus Beta was published in 1753 by Carl Linnaeus. [4] The type specimen is Beta vulgaris L. [5] It is the type genus for subfamily Betoideae in family Amaranthaceae (s.l, including the Chenopodiaceae).

Kadereit and colleagues used phylogenetic inference to classify members of the genus into two sections with seven or eight species: [2]

Excluded species: Beta patellaris Moq., Beta procumbens C.Sm. ex Hornem., and Beta webbiana Moq. are treated as an own genus, Patellifolia A.J.Scott, Ford-Lloyd & J.T.Williams. [2] [9]

Evolution

The differentiation between Beta and Patellifolia probably occurred early in the Late Oligocene. The Mediterranean ancestors of Beta began to differentiate around seven million years ago (Messinian Age of the Late Miocene). They evolved into two well-differentiated clades on each side of the Mediterranean: the western wild beets Beta vulgaris, Beta macrocarpa, and Beta patula, occurring in coastal and ruderal habitats; and the easternmost wild beets Beta corolliflora, Beta nana and Beta trigyna, occurring in continental mountainous zones. [9]

During the Messinian salinity crisis (5.96 to 5.33 million years ago) the Mediterranean Sea partly desiccated and left widespread salt marshes and halophytic habitats. After the sea had flooded back, the marshes were fragmented and taxa became isolated. Subsequent climatic changes led to further diversification. The western wild beets later colonized the Macaronesian Islands during the Pleistocene, probably by adaptations of the diaspores for sea dispersal (thalassochory). On these islands, the diversification was quite recent, and seems to be complicated by events of hybridization and gene flow. [9]

Uses

Beet (Beta vulgaris) has an immense economic importance as sugar crop (Sugar beet), and a great importance as a vegetable (Chard, Beetroot), and as fodder plant (Mangelwurzel). This species is also used as medicinal plant, ornamental plant, dye and as renewable resource. It is the crop species with the highest economical value in the order Caryophyllales. Therefore, the members of Beta and the related genus Patellifolia are interesting as Crop wild relatives. [9]

Related Research Articles

<i>Beta vulgaris</i> Species of flowering plant

Beta vulgaris (beet) is a species of flowering plant in the subfamily Betoideae of the family Amaranthaceae. Economically, it is the most important crop of the large order Caryophyllales. It has several cultivar groups: the sugar beet, of greatest importance to produce table sugar; the root vegetable known as the beetroot or garden beet; the leaf vegetable known as chard or spinach beet or silverbeet; and mangelwurzel, which is a fodder crop. Three subspecies are typically recognised. All cultivars, despite their quite different morphologies, fall into the subspecies Beta vulgaris subsp. vulgaris. The wild ancestor of the cultivated beets is the sea beet.

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

Amaranthaceae is a family of flowering plants commonly known as the amaranth family, in reference to its type genus Amaranthus. It includes the former goosefoot family Chenopodiaceae and contains about 165 genera and 2,040 species, making it the most species-rich lineage within its parent order, Caryophyllales.

<span class="mw-page-title-main">Salicornioideae</span> Subfamily of flowering plants

The Salicornioideae are a subfamily of the flowering plant family Amaranthaceae. Important characters are succulent, often articulated stems, strongly reduced leaves, and flowers aggregated in thick, dense spike-shaped thyrses. These halophytic plants are distributed worldwide. Many are edible

<span class="mw-page-title-main">Salsoloideae</span> Subfamily of flowering plants

The Salsoloideae are a subfamily of the Amaranthaceae, formerly in family Chenopodiaceae.

<span class="mw-page-title-main">Chenopodioideae</span> Subfamily of flowering plants

The Chenopodioideae are a subfamily of the flowering plant family Amaranthaceae in the APG III system, which is largely based on molecular phylogeny, but were included – together with other subfamilies – in the family Chenopodiaceae, or goosefoot family, in the Cronquist system.

<span class="mw-page-title-main">Sea beet</span>

The sea beet, Beta vulgaris subsp. maritima, is a member of the family Amaranthaceae, previously of the Chenopodiaceae. Carl Linnaeus first described Beta vulgaris in 1753; in the second edition of Species Plantarum in 1762, he divided the species into wild and cultivated varieties, giving the name Beta maritima to the wild taxon. The sea beet is native to the coasts of Europe, northern Africa, and southern Asia.

<i>Salsola</i> Genus of plants

Salsola is a genus of the subfamily Salsoloideae in the family Amaranthaceae. The genus sensu stricto is distributed in central and southwestern Asia, North Africa, and the Mediterranean. A common name of various members of this genus and related genera is saltwort, for their salt tolerance. The genus name Salsola is from the Latin salsus, meaning "salty".

<i>Halothamnus glaucus</i> Species of flowering plant

Halothamnus glaucus is a species of the plant genus Halothamnus, that belongs to the subfamily Salsoloideae of the family Amaranthaceae,. It occurs in Western and Central Asia.

<i>Bassia</i> Genus of flowering plants

Bassia is a genus of flowering plants in the family Amaranthaceae. They are distributed in the western Mediterranean to eastern Asia. Some occur outside their native ranges as introduced species.

<i>Halothamnus lancifolius</i> Species of plant in the family Annonaceae

Halothamnus lancifolius is a species of the plant genus Halothamnus, that belongs to the subfamily Salsoloideae within the family Amaranthaceae,. It occurs in Southwest Asia.

<span class="mw-page-title-main">Betoideae</span> Subfamily of flowering plants

The Betoideae are a small subfamily of the flowering plant amaranth family, Amaranthaceae sensu lato. Commonly known members include beet, sugar beet, chard, and mangelwurzel, which all are cultivars of Beta vulgaris.

<span class="mw-page-title-main">Polycnemoideae</span> Subfamily of flowering plants

The Polycnemoideae are a small subfamily of plants in the family Amaranthaceae, representing a basal evolutionary lineage. The few relictual species are distributed in Eurasia and North Africa, North America, and Australia.

<i>Dysphania</i> (plant) Genus of flowering plants

Dysphania is a plant genus in the family Amaranthaceae, distributed worldwide from the tropics and subtropics to warm-temperate regions.

<i>Kalidium</i> Genus of flowering plants

Kalidium is a genus of flowering plants in the plant family Amaranthaceae. The species are shrubby halophytes distributed in Southeast Europe, Southwest Asia and Central Asia to China.

<i>Halimione</i> Genus of flowering plants

Halimione is a plant genus from the subfamily Chenopodioideae of the family Amaranthaceae. It is a sister genus of Atriplex and is included in that genus by Plants of the World Online.

<i>Patellifolia</i> Genus of flowering plants

Patellifolia is a genus of flowering plants in the subfamily Betoideae of the family Amaranthaceae. These are mostly procumbent herbs occurring in the Western Mediterranean region and Macaronesia, with some isolated occurrences in North Africa and at the Horn of Africa. They are interesting as crop wild relatives of sugar beet.

Acroglochin is a genus of flowering plants in the family Amaranthaceae.

<i>Hammada</i> (plant) Genus of flowering plants

Hammada is a genus of flowering plants belonging to the family Amaranthaceae. It is also in the Salsoloideae subfamily. Although it is a very unclear and unsorted genus with many species that have later been classed as synonyms.

<i>Beta patula</i> Species of plant in the family Amaranthaceae

Beta patula is a species of wild beet in the family Amaranthaceae, native to Madeira. It is a close relative of Beta vulgaris. There are about 3000 individuals alive in the wild, distributed on two uninhabited islets; Ilhéu Chão, and Ilhéu da Cevada—also called dos Desembarcadouros—which is an extension of Ponta de São Lourenço and separated from it by only a few meters during high tide.

References

  1. 1 2 3 4 5 Leila M. Shultz: Beta. In: Flora of North America Editorial Committee (eds.): Flora of North America North of Mexico, Volume 4: Magnoliophyta: Caryophyllidae, part 1., Oxford University Press, New York 2003, ISBN   0-19-517389-9.
  2. 1 2 3 G. Kadereit, S. Hohmann & J. W. Kadereit: A synopsis of Chenopodiaceae subfam. Betoideae and notes on the taxonomy of Beta, In: Willdenowia, Volume 36, 2006, p. 9-19. PDF
  3. 1 2 3 4 I.C. Hedge: Beta. In: Karl Heinz Rechinger et al. (ed.): Flora Iranica, Vol. 172 - Chenopodiaceae. Graz, Akad. Druck, 1997, p. 20-24.
  4. Carl Linnaeus: Species Plantarum 1: 222. 1753.
  5. "Beta". Tropicos . Missouri Botanical Garden.
  6. "Beta vulgaris subsp. adanensis". Germplasm Resources Information Network . Agricultural Research Service, United States Department of Agriculture . Retrieved 4 August 2016.
  7. Carvalho, M.; Frese, L.; Duarte, M.C.; Magos Brehm, J.; Tavares, M.; Santos Guerra, A. & Draper, D. (2011). "Beta patula". IUCN Red List of Threatened Species . 2011. doi: 10.2305/IUCN.UK.2011-1.RLTS.T162088A5532483.en .
  8. Distribution map of Beta trigyna at PESI-Portal
  9. 1 2 3 4 Romeiras, M.M., Vieira, A., Silva, D.N., Moura, M., Santos-Guerra, A., Batista, D., Duarte, M.C., & Paulo, O.S. (2016). "Evolutionary and Biogeographic Insights on the Macaronesian Beta-Patellifolia Species (Amaranthaceae) from a Time-Scaled Molecular Phylogeny." PLoS One. 2016; 11(3): e0152456. doi : 10.1371/journal.pone.0152456