Genlisea tuberosa

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Genlisea tuberosa
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Lentibulariaceae
Genus: Genlisea
Subgenus: Genlisea subg. Genlisea
Species:
G. tuberosa
Binomial name
Genlisea tuberosa

Genlisea tuberosa is a carnivorous species in the genus Genlisea (family Lentibulariaceae) that is endemic to Brazil and found only in campos rupestres vegetation. Lacking any roots, it has unpigmented bundles of "rootlike" subterranean organs, technically leaves, which attract, trap, and digest protozoans. This species is unique in the genus in its formation of tubers. [1] As of 2014, Genlisea tuberosa has the smallest known genome of any flowering plant, at 61 Mbp, or 61,000,000 base pairs. [2]

Distribution and habitat

Genlisea tuberosa is endemic to Brazil where it is found only in the campos rupestres vegetation in the Brazilian states of Bahia, Goiás, Distrito Federal, and Minas Gerais. It grows in fast-draining sandy soils in seasonally wet areas from 800 to 1,500 m (2,600 to 4,900 ft) altitude. It can be found growing in the presence of other species of Genlisea, including G. aurea , G. filiformis , and G. violacea , and among Utricularia , Drosera , and some grasses. Genlisea tuberosa flowers from February to June in its native habitat and enters dormancy during the winter dry season. [1]

Genome

The genomes of several species in the genus Genlisea were studied in 2006 along with other members of the Lentibulariaceae family. According to the study, prior to its publication the smallest known angiosperm (flowering plant) genome was that of Arabidopsis thaliana at 157 Megabase pairs (Mbp). This 2006 report identified the related species G. margaretae as having the smallest known angiosperm genome size at 63.4 Mbp, just 0.2 Mbp lower than that of Genlisea aurea . [3] Further research in 2014 found that the recently described Genlisea tuberosa has the smallest angiosperm genome known at around 61 Mbp. [4]

Botanical history

Genlisea tuberosa was first discovered by the carnivorous plant specialist Thomas Carow in the late 1980s near the town of Diamantina in Minas Gerais, Brazil. Carow, however, identified the specimens he examined as Genlisea pygmaea . The new species was later rediscovered by Fernando Rivadavia in 2007 and formally described by Rivadavia, Paulo Minatel Gonella, and Andreas Fleischmann in a 2013 issue of the journal Systematic Botany . [1]

Related Research Articles

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

Droseraceae is a family of carnivorous flowering plants, also known as the sundew family. It consists of approximately 180 species in three extant genera. Representatives of the Droseraceae are found on all continents except Antarctica.

<span class="mw-page-title-main">Lentibulariaceae</span> Family of carnivorous plants

Lentibulariaceae is a family of carnivorous plants containing three genera: Genlisea, the corkscrew plants; Pinguicula, the butterworts; and Utricularia, the bladderworts.

<i>Utricularia</i> Genus of carnivorous plants

Utricularia, commonly and collectively called the bladderworts, is a genus of carnivorous plants consisting of approximately 233 species. They occur in fresh water and wet soil as terrestrial or aquatic species across every continent except Antarctica. Utricularia are cultivated for their flowers, which are often compared with those of snapdragons and orchids, especially amongst carnivorous plant enthusiasts.

<i>Genlisea</i> Genus of carnivorous plants

Genlisea is a genus of carnivorous plants also known as corkscrew plants. The 30 or so species grow in wet terrestrial to semi-aquatic environments distributed throughout Africa and Central and South America. The plants use highly modified underground leaves to attract, trap and digest minute microfauna, particularly protozoans. Although suggested a century earlier by Charles Darwin, carnivory in the genus was not proven until 1998.

<i>Heliamphora</i> Genus of carnivorous plants

The genus Heliamphora contains 24 species of pitcher plants endemic to South America. The species are collectively known as sun pitchers, based on the mistaken notion that the heli of Heliamphora is from the Greek helios, meaning "sun". The name instead derives from the Greek helos, meaning "marsh", so a more accurate translation of their scientific name would be marsh pitcher plants. Species in the genus Heliamphora are carnivorous plants that consist of a modified leaf form that is fused into a tubular shape. They have evolved mechanisms to attract, trap, and kill insects; and control the amount of water in the pitcher. At least one species produces its own proteolytic enzymes that allows it to digest its prey without the help of symbiotic bacteria.

C-value is the amount, in picograms, of DNA contained within a haploid nucleus or one half the amount in a diploid somatic cell of a eukaryotic organism. In some cases, the terms C-value and genome size are used interchangeably; however, in polyploids the C-value may represent two or more genomes contained within the same nucleus. Greilhuber et al. have suggested some new layers of terminology and associated abbreviations to clarify this issue, but these somewhat complex additions are yet to be used by other authors.

<i>Genlisea aurea</i> Species of carnivorous plant

Genlisea aurea is one of the largest carnivorous species in the genus Genlisea. It has pale bundles of root-like organs up to about 15 cm long under ground that attract, trap, and digest protozoans. These organs are subterranean leaves, which lack chlorophyll. G. aurea is endemic to Brazil, where it grows with several other species of Genlisea. It possesses an exceptionally small genome for a flowering plant.

<i>Heliamphora minor</i> Species of carnivorous plant

Heliamphora minor is a species of marsh pitcher plant endemic to Auyán-tepui in Venezuela. As the name suggests, it is one of the smallest species in the genus. It is closely related to H. ciliata and H. pulchella.

Genlisea margaretae is a carnivorous species in the genus Genlisea native to areas of Madagascar, Tanzania, and Zambia. It has pale bundles of root-like organs up to about 20 cm long under ground that attract, trap, and digest protozoans. These organs are subterranean leaves, which lack chlorophyll. It had been known to possess the smallest known genome of any flowering plant as of 2006, but was later surpassed by the related species Genlisea tuberosa.

Philcoxia is a genus of seven rare plant species in the Plantaginaceae that are endemic to Brazil and resemble terrestrial species of the genus Utricularia. The genus, formally described in 2000, consists of the species P. bahiensis, P. goiasensis, P. minensis, P. tuberosa, P. rhizomatosa, P. maranhensis and P. courensis, each of the first three named for the Brazilian state to which it is endemic. The species are characterized by subterranean stems, peltate leaves at or below the soil surface, and five-lobed calyces. Their habitat has been reported as areas of white sand in the midst of cerrado vegetation at an elevation between 800 and 1450 m. Initial descriptions of the genus included suspicions that the plethora of stalked capitate glands on the upper surfaces of leaves was an indication that these species may be carnivorous. A study published in 2007 tested P. minensis for protease activity, a typical test for the carnivorous syndrome, and could detect none. Later studies detected other digestive enzymes such as phosphatases and qualitatively assessed prey digestion and nutrient uptake, suggesting that it is a true carnivorous plant. The genus epithet honors David Philcox (1926-2003), a botanist at Kew Gardens who worked extensively in tropical Scrophulariaceae.

Peter Geoffrey Taylor (1926–2011) was a British botanist who worked at Royal Botanic Gardens, Kew throughout his career in botany. Taylor was born in 1926 and joined the staff of the herbarium at Kew in 1948. He published his first new species, Utricularia pentadactyla, in 1954. In 1973, Taylor was appointed curator of the orchid division of the herbarium and, according to Kew, "under his direction, orchid taxonomy was revitalised and its horticultural contacts strengthened."

<i>Utricularia rostrata</i> Species of carnivorous plant

Utricularia rostrata is a small annual carnivorous plant that belongs to the genus Utricularia. U. rostrata is endemic to the Chapada Diamantina highlands of Bahia, Brazil. It grows as a terrestrial plant in damp sandy soils near streams and waterfalls in semi-shaded areas at altitudes from 550 to 1,570 metres. It was originally described and published by Andreas Fleischmann and Fernando Rivadavia in 2009, though specimens of this species had been discovered as early as 1992. Fleischmann and Rivadavia note that the species is common throughout the Chapada Diamantina highlands and its distribution includes Chapada Diamantina National Park, thus justifying its ranking as a species of Least Concern under the IUCN.

<i>Drosera sessilifolia</i> Species of carnivorous plant

Drosera sessilifolia is a species in the carnivorous plant genus Drosera that is native to Brazil, Guyana, and Venezuela and grows in sandy or gravelly soils in seasonal seepages where a thin film of water collects. It produces a rosette of small, wedge-shaped to round carnivorous leaves that are usually yellowish but become redder with age. Inflorescences produce pink-lilac flowers. It has a diploid chromosome number of 2n = 20.

Drosera quartzicola is a species in the carnivorous plant genus Drosera and is endemic to the Serra do Cipó in central Minas Gerais state in southeastern Brazil. It is perennial plant that produces leaves, 0.7–4 cm (0.3–1.6 in) long, in a rosette that is sometimes on a short stem about 4 cm (1.6 in) tall. It is found growing in campo rupestre vegetation along with D. tentaculata and D. chrysolepis. It is typically found growing in silica sands surrounded by white quartz gravel, which is the origin of the specific epithet quartzicola. Drosera quartzicola grows in drier habitats than other Drosera species and flowers earlier in the wet season from January to February. It superficially resembles D. schwackei, but it is more closely related to D. camporupestris, D. graminifolia, and D. chrysolepis.

Philcoxia minensis is a rare annual herb of the family Plantaginaceae, that is endemic to the Serra do Cabral area of the Brazilian state Minas Gerais. It was discovered April 17, 1981 by David philcox. in the municipality of Joaquim Felício and grew near other plants from the campos rupestres montane savanna. The exact location of collection was unspecified. The species has been shown to produce phosphatases.

<i>Drosera graomogolensis</i> Species of carnivorous plant

Drosera graomogolensis is a carnivorous plant species native to the State Minas Gerais in Brazil and is now cultivated as an ornamental in Europe. In Brazil, it grows in the campos rupestres habitat.

<i>Drosera tentaculata</i> Species of carnivorous plant

Drosera tentaculata is a carnivorous plant native to Brazil. The species is endemic to the Brazil and occurs in "rupestre" field at the "Cadeia do Espinhaço" Highlands in the Bahia and Minas Gerais.

<i>Drosera magnifica</i> Species of carnivorous plant

Drosera magnifica is a species of sundew endemic to Pico do Padre Ângelo in eastern Minas Gerais in southeastern Brazil, where it grows among sandstone outcrops in herbaceous and shrubby vegetation. It is one of the three largest species of Drosera – the other two being D. regia from South Africa and D. gigantea from Australia – and was discovered in 2015 through images which appeared on the social network Facebook. It is the largest New World sundew, and it is closely related to Drosera graminifolia and Drosera spiralis. According to the IUCN Red List categories and criteria, it is considered Critically Endangered. Brazil is home to some 30 species of Drosera.

Pinguicula hemiepiphytica is a tropical carnivorous plant species native to the cloud forests of Oaxaca, Mexico. It was first identified in 1991 and is one of the few epiphytic species in the genus.

References

  1. 1 2 3 Rivadavia F, Gonella PM, Fleischmann A (2013). "A new and tuberous species of Genlisea (Lentibulariaceae) from the campos rupestres of Brazil". Systematic Botany. 38 (2): 464–470. doi:10.1600/036364413X666679. S2CID   86552321.
  2. "Plants with pocket-sized genomes". Ludwig-Maximillian University News. Retrieved 11 January 2021.
  3. Greilhuber J, Borsch T, Müller K, Worberg A, Porembski S, Barthlott W (2006). "Smallest angiosperm genomes found in Lentibulariaceae, with chromosomes of bacterial size". Plant Biology. 8 (6): 770–777. Bibcode:2006PlBio...8..770G. doi:10.1055/s-2006-924101. PMID   17203433.
  4. Fleischmann A, Michael TP, Rivadavia F, Sousa A, Wang W, Temsch EM, Greilhuber J, Müller KF, Heubl G (2014). "Evolution of genome size and chromosome number in the carnivorous plant genus Genlisea (Lentibulariaceae), with a new estimate of the minimum genome size in angiosperms". Annals of Botany. 114 (8): 1651–1663. doi:10.1093/aob/mcu189. PMC   4649684 . PMID   25274549.