Macadamia jansenii

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Macadamia jansenii
Macadamia jansenii juvenile.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Macadamia
Species:
M. jansenii
Binomial name
Macadamia jansenii
C.L.Gross & P.H.Weston

Macadamia jansenii is an endangered and poisonous tree in the flowering plant family Proteaceae, native to Queensland in Australia. [1] It was only described as a new species in 1991, being first brought to the attention of plant scientists in 1983 by Ray Jansen, a sugarcane farmer and amateur botanist from South Kolan in Central Queensland. [2] Closely related to the cultivated and recently domesticated macadamia nut, it has small 11–16 mm diameter nuts that have a smooth, hard, brown shell enclosing a cream, globulose kernel that is bitter and inedible. In the wild it grows as a multi-stemmed 6–9m tall evergreen tree, with leaves having entire margins and generally in whorls of 3. [3] An extremely rare species, it was discovered as a single population of around 60 plants in the wild in Eastern Australia. [4] In 2018 about 60 new mature Macadamia jansenii trees were located, although a quarter of these were destroyed in the bush fires of 2019.

Sequencing of the genome was carried out, as knowing the genotype of wild crop relatives is critical to diversification of crop genetics to ensure food security. Producing a 751 Mb reference genome assembled to 14 chromosomes. [5] Currently there are only around 100 known trees in existence all growing grows near Miriam Vale in Queensland, meaning this is a potential model to study the diversity of a whole species. Helping understand the impact of small population size and the associated genetic bottlenecks.

See also

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Mount Bauple is a scientific national park in the Fraser Coast Region, Queensland, Australia, 190 km north of Brisbane.

<i>Macadamia</i> Genus of plants indigenous to Australia

Macadamia is a genus of four species of trees in the flowering plant family Proteaceae. They are indigenous to Australia, native to northeastern New South Wales and central and southeastern Queensland specifically. Two species of the genus are commercially important for their fruit, the macadamia nut. Global production in 2015 was 160,000 tonnes. Other names include Queensland nut, bush nut, maroochi nut, bauple nut and Hawaii nut. In Australian Aboriginal languages, the fruit is known by names such as bauple, gyndl or jindilli and boombera. It was an important source of bushfood for the Aboriginal peoples who are the original inhabitants of the area.

Waratah Genus of plants in the family Proteaceae from southeastern Australia

Waratah (Telopea) is an Australian-endemic genus of five species of large shrubs or small trees, native to the southeastern parts of Australia. The best-known species in this genus is Telopea speciosissima, which has bright red flowers and is the NSW state emblem. The Waratah is a member of the family Proteaceae, flowering plants distributed in the Southern Hemisphere. The key diagnostic feature of Proteaceae is the inflorescence, which is often very large, brightly coloured and showy, consisting of many small flowers densely packed into a compact head or spike. Species of waratah boast such inflorescences ranging from 6–15 cm in diameter with a basal ring of coloured bracts. The leaves are spirally arranged, 10–20 cm long and 2–3 cm broad with entire or serrated margins. The name waratah comes from the Eora Aboriginal people, the pre-European inhabitants of the Sydney area.

<i>Lomatia tasmanica</i> Tasmanian shrub from the family Proteaceae

Lomatia tasmanica, commonly known as King's lomatia, is a shrub of the family Proteaceae native to Tasmania. Growing up to 8 metres (26 ft) tall, the plant has shiny green pinnate (lobed) leaves and bears red flowers in the summer, but yields neither fruit nor seeds. King's lomatia is unusual because all of the remaining plants are genetically identical clones. Because it has three sets of chromosomes and is therefore sterile, reproduction occurs only vegetatively: when a branch falls, that branch grows new roots, establishing a new plant that is genetically identical to its parent.

<i>Athertonia</i> Monotypic genus of trees in the family Proteaceae from north-eastern Queensland, Australia

Athertonia is a genus of tall trees, constituting part of the plant family Proteaceae. It is a monotypic taxon, and the sole described species is Athertonia diversifolia, commonly known as Atherton oak. It is a small to medium-sized tree and is endemic to restricted tablelands and mountainous regions of the wet tropics rain forests of north-eastern Queensland, Australia, where it is widespread. For example, it grows in the Atherton Tableland region with which it shares its name, from the colonial pastoralist John Atherton (1837–1913). Its closest relatives are Heliciopsis and Virotia. A relative of the macadamia, it has potential as an ornamental tree and has an edible nut.

<i>Hicksbeachia</i> Genus of trees in the family Proteaceae from eastern Australia

Hicksbeachia is a genus of two species of trees in the family Proteaceae. They are native to rainforests of northern New South Wales and southeastern Queensland. They are commonly known as red bopple nut or beef nut due to the bright red colour of their fruits.

Proteaceae Family of flowering plants

The Proteaceae form a family of flowering plants predominantly distributed in the Southern Hemisphere. The family comprises 83 genera with about 1,660 known species. Together with the Platanaceae and Nelumbonaceae, they make up the order Proteales. Well-known genera include Protea, Banksia, Embothrium, Grevillea, Hakea and Macadamia. Species such as the New South Wales waratah, king protea, and various species of Banksia, soman, and Leucadendron are popular cut flowers. The nuts of Macadamia integrifolia are widely grown commercially and consumed, as are those of Gevuina avellana on a smaller scale. Australia and South Africa have the greatest concentrations of diversity.

<i>Macadamia tetraphylla</i> Species of tree in the family Proteaceae native to Queensland and New South Wales in Australia

Macadamia tetraphylla is a tree in the family Proteaceae, native to southern Queensland and northern New South Wales in Australia. Common names include macadamia nut, bauple nut, prickly macadamia, Queensland nut, rough-shelled bush nut and rough-shelled Queensland nut.

<i>Macadamia integrifolia</i> Species of flowering plant in the family Proteaceae

Macadamia integrifolia is a small to medium-sized tree, growing to 15 metres in height. Native to rainforests in south east Queensland and northern New South Wales, Australia. Common names include macadamia, smooth-shelled macadamia, bush nut, Queensland nut, Bauple nut and nut oak.

Juglans sigillata, also called iron walnut, is the second most cultivated species of walnut tree after the Persian walnut Juglans regia. Commonly distributed in the eastern Himalayas and western China. The tree has been cultivated for its edible nuts, and there are at least 80 authorised or approved cultivars produced after successful implementation of grafting technology.

<i>Eidothea hardeniana</i> Species of tree in the family Proteaceae

Eidothea hardeniana, commonly named nightcap oak, is a species of tree, up to 40 m (130 ft) tall, of the plant family Proteaceae, which botanist Robert Kooyman recognised as a new species only recently in 2002. The species has an official listing as critically endangered on the Australian Commonwealth EPBC Act and as Endangered on the NSW Threatened Species Act. The name hardeniana honours the botanist Gwen Harden. Phylogenetics studies now suggest it represents a basal branch of the Proteoid clade of the Proteaceae.

Flora of Australia Plant species of Australia

The flora of Australia comprises a vast assemblage of plant species estimated to over 30,000 vascular and 14,000 non-vascular plants, 250,000 species of fungi and over 3,000 lichens. The flora has strong affinities with the flora of Gondwana, and below the family level has a highly endemic angiosperm flora whose diversity was shaped by the effects of continental drift and climate change since the Cretaceous. Prominent features of the Australian flora are adaptations to aridity and fire which include scleromorphy and serotiny. These adaptations are common in species from the large and well-known families Proteaceae (Banksia), Myrtaceae, and Fabaceae.

Cardwellia is a genus of a sole described species of large trees in the plant family Proteaceae. The species Cardwellia sublimis is endemic to the rainforests of the wet tropics region of northeastern Queensland, Australia. Other common names include bull oak, golden spanglewood, lacewood, oak and oongaary. The compound leaves have up to 17 leaflets. It produces white inflorescences followed by woody fruits which are prominently displayed outside the canopy.

<i>Hicksbeachia pinnatifolia</i> Species of tree

Hicksbeachia pinnatifolia is a small tree in the family Proteaceae. This rare species is native to subtropical rainforest in New South Wales and Queensland in Australia. Common names include red bopple nut, monkey nut, red nut, beef nut, rose nut and ivory silky oak. The tree produces fleshy, red fruits during spring and summer. These contain edible seeds.

Nothorites is a genus of a sole described species of trees, constituting part of the plant family Proteaceae. The species Nothorites megacarpus grows naturally only in restricted mountain regions (endemic) of the wet tropics rain forests of north-eastern Queensland, Australia.

<i>Lasjia</i> Genus of trees of the family Proteaceae

Lasjia is a genus of five species of trees of the family Proteaceae. Three species grow naturally in northeastern Queensland, Australia and two species in Sulawesi, Indonesia. Descriptively they are the tropical or northern macadamia trees group. Lasjia species characteristically branched compound inflorescences differentiate them from the Macadamia species, of Australia, which have characteristically unbranched compound inflorescences and only grow naturally about 1,000 km (620 mi) further to the south, in southern and central eastern Queensland and in northeastern New South Wales.

H2 Hinde Tree Historic site in Queensland, Australia

The H2 Hinde Tree is a heritage-listed tree of the species Macadamia integrifolia at Colliston, 926 Gilston Road, Gilston, City of Gold Coast, Queensland, Australia. It was added to the Queensland Heritage Register on 14 August 2008.

<i>Macadamia ternifolia</i> Species of tree

Macadamia ternifolia is a tree in the flowering plant family Proteaceae, native to Queensland in Australia, and is listed as vulnerable under the EPBC Act.

Genome sequencing of endangered species is the application of Next Generation Sequencing (NGS) technologies in the field of conservative biology, with the aim of generating life history, demographic and phylogenetic data of relevance to the management of endangered wildlife.

References

  1. "Macadamia jansenii". University of the Sunshine Coast. Shapcott, A. Macadamia jansenii Recovery Project. 2010. Retrieved 16 March 2017.
  2. "Critically endangered macadamia species becomes a plant supermodel". BIOENGINEER.ORG. 8 March 2021. Retrieved 4 May 2021.
  3. Gross, C. L.; Weston, P. H. (1992). "Macadamia jansenii (Proteaceae), a new species from central Queensland". Australian Systematic Botany. 5 (6): 725–728. doi:10.1071/sb9920725. ISSN   1446-5701.
  4. "The Four Macadamias". Macadamia Conservation Trust. Retrieved 4 May 2021.
  5. Murigneux, Valentine; Rai, Subash Kumar; Furtado, Agnelo; Bruxner, Timothy J C; Tian, Wei; Harliwong, Ivon; Wei, Hanmin; Yang, Bicheng; Ye, Qianyu; Anderson, Ellis; Mao, Qing (30 November 2020). "Comparison of long-read methods for sequencing and assembly of a plant genome". GigaScience. 9 (giaa146). doi:10.1093/gigascience/giaa146. ISSN   2047-217X. PMC   7751402 . PMID   33347571.