Patellifolia

Last updated

Patellifolia
Patellifolia patellaris kz2.JPG
Patellifolia patellaris
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Amaranthaceae
Subfamily: Betoideae
Tribe: Hablitzieae
Genus: Patellifolia
A.J.Scott, Ford-Lloyd & J.T. Williams
Species

1-3 species, see text

Synonyms [1]

Beta sect. ProcumbentesUlbr.

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.

Contents

Description

Inflorescence of Patellifolia procumbens Patellifolia procumbens Tenerife 2.jpg
Inflorescence of Patellifolia procumbens
Fruit of Patellifolia patellaris Patellifolia patellaris Tenerife 2 fruit.jpg
Fruit of Patellifolia patellaris

Patellifolia are annual or perennial herbs, growing erect or often procumbent. The alternate leaves have a petiole, their leaf blade is heart-shaped or hastate. [2]

The spike-like inflorescences consist of glomerules of one to three flowers sitting in the axils of leaf-like bracts. The free flowers are hermaphrodite. The perianth consists of five herbaceous, slightly keeled tepal lobes which are connate at base. There are five stamens opposite to the tepals, their filaments are fused at base forming a disc. The ovary is semi-inferior with 2 stigmas. [2]

In fruit, the ovary is partly immersed in the enlarged base of the perianth. The tepal lobes are not modified and appressed to the fruit. [1] The solitary fruits are nearly globular capsules, they fall down when ripe and open with a circumscissile lid. The vertical seed contains an annular embryo and copious perisperm (feeding tissue). [2]

Distribution and habitat

Patellifolia is mainly distributed in the Western Mediterranean region (Spain, Morocco), Macaronesia and Cape Verde Islands. There are also some isolated occurrences in North Africa (Hoggar Mountains and Tassili n'Ajjer, Libya), and in the Horn of Africa region (Socotra, Somalia). [3]

The plants grow in more or less coastal habitats from sea level up to 200 m, in Macaronesia and the Western Mediterranean region, and also in Socotra. But in the North African mountains they were found at higher altitudes up to 2000 m, and also in Somalia at 1150 m. [3]

Systematics

Patellifolia patellaris Patellifolia patellaris Tenerife 1.jpg
Patellifolia patellaris
Patellifolia procumbens Patellifolia procumbens Tenerife 1.jpg
Patellifolia procumbens
Patellifolia webbiana Histoire naturelle des Iles Canaries, T. 202, Beta webbiana.jpg
Patellifolia webbiana

The genus Patellifolia was published in 1977 by A J Scott, Brian V. Ford-Lloyd and J. Trevor Williams, with the type species Patellifolia webbiana. [4] The same authors had described this taxon already in 1976 as PatellariaJ.T. Williams, A.J.Scott & Ford-Lloyd, but that was an illegitimate name, (because the lichen genus Patellaria Hoffmann was published earlier in 1789). [5]

These plants were first grouped together in 1927 by Vladimir Andreevich Tranzschel as an informal unranked taxon Patellares in the genus Beta. In 1934, Oskar Eberhard Ulbrich placed them in a new section Beta sect. Procumbentes. [6] Until 2006, Patellifolia was often not accepted as a separate genus. But recent molecular genetic studies by Kadereit et al. (2006) and Romeiras et al. (2016) revealed a deep genetic differentiation between Beta and Patellifolia and confirmed the status as own genus. [1] [7]

Patellifolia comprises one to three species:

It was suggested that Patellifolia procumbens and Patellifolia webbiana might not be different species. [8] The identification of the three species is difficult, and some distinguishing characters were found to be unreliable. Therefore, Thulin et al. (2010) proposed to treat all members of Patellifolia as a single variable species, Patellifoia procumbens . [3] This proposal was followed in the Euro+Med Plant Base. [9]

But Patellifolia patellaris could not be hybridised with the other two species, supporting the rank of an own species. [1] The island species evolved recently, and because of their isolation they developed only small genetic differentiation. As a result, they show only weak genetic barriers to hybridization. [7]

Evolution

Patellifolia is a rather old genus; [1] the divergence from its sister genus Beta probably occurred early in the Late Oligocene. [7] Its subtaxa are relatively young, diversifying in the late Pliocene or early Quaternary. [1] [7] The present distribution area suggests that it was previously a widespread taxon, but later the area fragmented and extensive extinctions occurred. [3]

Crop wild relatives

Patellifolia is related to the economically important cultivated beets ( Beta vulgaris subsp. vulgaris, with sugar beet, beetroot, chard and fodder beet). Therefore, Patellifolia is of great interest as Crop wild relative and potential gene donor. [7] They seem to be resistant to some of the most serious diseases of sugar beets, to leaf spot disease caused by Cercospora beticola , curly top virus, rhizomania, and powdery mildew ( Erysiphe polygoni ). [7] All three species proved to be highly resistant to the Beet cyst eelworm (Heterodera schachtii). The three species differ in their resistance level, whereas Patellifolia patellaris is not completely immune, but eelworms never develop to maturity in the other two species. [1]

Related Research Articles

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

Beta vulgaris (beet) is a plant which is included in the subfamily Betoideae of the family Amaranthaceae. It is the economically 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; and mangelwurzel, which is a fodder crop. Three subspecies are typically recognised. All cultivars fall into the subspecies Beta vulgaris subsp. vulgaris. The wild ancestor of the cultivated beets is the sea beet.

Amaranthaceae 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.

<i>Salicornia</i> Genus of flowering plants in the family Amaranthaceae

Salicornia is a genus of succulent, halophyte flowering plants in the family Amaranthaceae that grow in salt marshes, on beaches, and among mangroves. Salicornia species are native to North America, Europe, South Africa, and South Asia. Common names for the genus include glasswort, pickleweed, picklegrass, and marsh samphire; these common names are also used for some species not in Salicornia. To French speakers in Atlantic Canada, they are known, colloquially, as "titines de souris". The main European species is often eaten, called marsh samphire in Britain, and the main North American species is occasionally sold in grocery stores or appears on restaurant menus, usually as 'sea beans' or samphire greens or sea asparagus.

<i>Sarcocornia</i>

Sarcocornia is a genus of flowering plants in the amaranth family, Amaranthaceae. They are known commonly as samphires, glassworts, or saltworts. The genus has a cosmopolitan distribution, and is most diverse in the Cape Floristic Region of South Africa.

Salicornioideae

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.

Salsoloideae

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

Chenopodioideae 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 family Chenopodiaceae in the Cronquist system. Food species comprise Spinach, Good King Henry, several Chenopodium species, Orache, and Epazote.

Sea beet

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>Beta</i> (plant) Genus of flowering plants in the amaranth family Amaranthaceae

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.

<i>Salsola</i>

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>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.

Betoideae 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.

Camphorosmeae Tribe of flowering plants

Camphorosmeae is a species-rich tribe of the Amaranthaceae, formerly Chenopodiaceae, with 20 genera and about 179 species. It is classified as a single tribe of subfamily Camphorosmoideae.

Polycnemoideae

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.

Suaedoideae

The Suaedoideae are a subfamily of plants in the family Amaranthaceae.

<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>Halostachys</i> genus of flowering plants

Halostachys is a genus of flowering plants in the plant family Amaranthaceae, containing a single species, Halostachys belangeriana. The plants are small to medium halophytic shrubs with apparently jointed fleshy stems and scale-like leaves. They are native to Asia and southeastern Europe.

<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>Arthrocnemum</i> Genus of flowering plants

Arthrocnemum is a genus of shrubs in the family Amaranthaceae. Plants are halophytes with fleshy, apparently articulated plant stems and reduced leaves and flowers. There are two species, occurring from Southwest Asia and the Mediterranean region, to western tropical Africa and Macaronesia. An American species will have to be excluded.

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

Acroglochin is a genus of flowering plants in the plant family Amaranthaceae, containing a single species, Acroglochin persicarioides. It is distributed from the Himalayas to China. The systematic position in subfamily Betoideae is still uncertain.

References

  1. 1 2 3 4 5 6 7 Kadereit, G., Hohmann, S. & Kadereit, J.W. (2006). "A synopsis of Chenopodiaceae subfam. Betoideae and notes on the taxonomy of Beta". - Willdenowia 36, p. 9-19.
  2. 1 2 3 Bolibar, S.C.: Patellifolia in Flora Iberica p.482-484., accessed 20 August 2016.
  3. 1 2 3 4 5 Thulin, M.; Rydberg, A.; Thiede, H. (2010). "Identity of Tetragonia pentandra and taxonomy and distribution of Patellifolia (Chenopodiaceae)". Willdenowia 40(1): 5-11. doi : 10.3372/wi.40.40101
  4. Scott, A.J., Ford-Lloyd, B.V. & Williams, J.T. (1977). "Patellifolia, nomen novum (Chenopodiaceae)". Taxon 26(2–3): 284. doi : 10.2307/1220567
  5. "Patellaria J.T. Williams & Ford-Lloyd ex J.T. Williams, A.J. Scott & Ford-Lloyd Synonym". Tropicos . Missouri Botanical Garden.
  6. Ulbrich, O.E. (1934). "Chenopodiaceae", in: Engler, A. & Prantl, K.A.E. (eds.): "Die natürlichen Pflanzenfamilien", ed.2 16c, Engelmann, Leipzig: 455.
  7. 1 2 3 4 5 6 7 8 9 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
  8. 1 2 Santos-Guerra, A.; Frese, L. (2011). Patellifolia webbiana. The IUCN Red List of Threatened Species 2011: e.T172260A6859581. doi : 10.2305/IUCN.UK.2011-1.RLTS.T172260A6859581.en. Accessed 19 August 2016.
  9. Uotila, P. (2011): Patellifolia. In: "Chenopodiaceae (pro parte majore)." In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.