Trigonella suavissima

[2][1] The species was formally described by English botanist John Lindley, based on plant material collected during an expedition by Thomas Mitchell.

[15] It is frequently found in inland arid environments in central Australia, as there are river banks with heavy-clay soils.

[16] It relies on highly inundated soil, predominantly in river banks, low-lying depressions and flooded areas.

[16] Therefore, the Channel Country near Lake Eyre in Queensland, Brancannia Basin in New South Wales and the Darling Basins in east south Australia which are all middle to low reaches of inland river systems are popular breeding places of Trigonella suavissima.

[11] Trigonella suavissima is pollinated by insects even though its self-compatibility is still unknown,[18] the fruits are able to fall off plants when it is mature even though the species is usually indehiscent or merely tardily dehiscent.

[19] The species is also highly tolerant to salinity, being able to develop a 106% of growth even under the control settings of 45 nM sodium chloride concentration.

The species is consistently categorised as part of the Falcatulae section throughout studies carried out in 1928,[3] 1932,[3] 1989[21] and 2016[4] by different scientists.

[4] The formation of strongly supported clade indicates that the species share a common ancestral linkage despite having various legume characteristics.

[26] A minor proportion of Trigonella suavissima was seasonally prolific on the bed of the ephemeral Lake Tandou near Menindee where the stands of Medicago sativa used to be grown.

[7] Sinorhizobium usually inhabits locations with fine-textured clay soil, which is similar to its host plant Trigonella suavissima.

This is due to the development of clay envelopes around the bacterial cells which have the capacity to modify the response of the bacteria to the environment, allowing Sinorhizobium to better adapt to the soil.

[33] They also have distinct geological distributions, where Trigonella suavissima is endemic to Australia and are mainly located in salty and grassy plains in semi-arid areas of interior Australia, Trigonella anguina is mainly found in semi-desert and desert regions in South Africa and is best adapted in soils with high clay content.

[38] Facilitating engagement through strong relationships between primary healthcare and Aboriginal and Torres Strait Islander peoples.

[39] It cannot replace current grain legumes like Cicer arietinum i.e. chickpeas, Lupinus angustifolius i.e. blue lupins and Pisum sativum i.e. peas , Trigonella suavissima is still a viable option as a substitute when the harvest of the grain crops are unsustainable under arid climate and infertile soil.

As it grows in dry areas with limited water and infertile soil, it acts as a resource for foreign legume breeders to improve adaptation of their plants to adverse climate and environment.

[42] It is found that Trigonella suavissima is highly suitable to be domesticated as grain crops after studying its adaptation to arid and semi-arid environments with winter-dominant infertile soil, growth habit, pod indelhiscience, anti-nutritional toxins etc.

[43] However, the species has not yet been adapted as grain crops because of its unknown properties and the limitation of a small seed size.

[46] The species is a vital and prominent component of the forage as green feed and standing dry hay because of its prolific growth after periodic floodings, contributing to the $200 million worth annual profit of the beef industry of the Channel Country of Australia, especially the cattle-fattening enterprises.

Location of Lake Eyre on the Australian map [ 13 ]
An image of Sinorhizobium under microscope [ 28 ]