Botany, also called plant science, plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek word botanē (βοτάνη) meaning "pasture", "herbs" "grass", or "fodder"; Botanē is in turn derived from boskein, "to feed" or "to graze". Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists study approximately 410,000 species of land plants, including some 391,000 species of vascular plants and approximately 20,000 bryophytes.
The Fabaceae or Leguminosae, commonly known as the legume, pea, or bean family, are a large and agriculturally important family of flowering plants. It includes trees, shrubs, and perennial or annual herbaceous plants, which are easily recognized by their fruit (legume) and their compound, stipulate leaves. The family is widely distributed, and is the third-largest land plant family in number of species, behind only the Orchidaceae and Asteraceae, with about 765 genera and nearly 20,000 known species.
Alfalfa, also called lucerne, is a perennial flowering plant in the legume family Fabaceae. It is cultivated as an important forage crop in many countries around the world. It is used for grazing, hay, and silage, as well as a green manure and cover crop. The name alfalfa is used in North America. The name lucerne is more commonly used in the United Kingdom, South Africa, Australia, and New Zealand. The plant superficially resembles clover, especially while young, when trifoliate leaves comprising round leaflets predominate. Later in maturity, leaflets are elongated. It has clusters of small purple flowers followed by fruits spiralled in two to three turns containing 10–20 seeds. Alfalfa is native to warmer temperate climates. It has been cultivated as livestock fodder since at least the era of the ancient Greeks and Romans.
Ensifer meliloti are an aerobic, Gram-negative, and diazotrophic species of bacteria. S. meliloti are motile and possess a cluster of peritrichous flagella. S. meliloti fix atmospheric nitrogen into ammonia for their legume hosts, such as alfalfa. S. meliloti forms a symbiotic relationship with legumes from the genera Medicago, Melilotus and Trigonella, including the model legume Medicago truncatula. This symbiosis promotes the development of a plant organ, termed a root nodule. Because soil often contains a limited amount of nitrogen for plant use, the symbiotic relationship between S. meliloti and their legume hosts has agricultural applications. These techniques reduce the need for inorganic nitrogenous fertilizers.
Ensifer is a genus of nitrogen-fixing bacteria (rhizobia), three of which have been sequenced.
Trigonella suavissima is a herbaceous plant that is endemic to Australia. It is a member of the genus Trigonella and the family Fabaceae. Common names include Cooper clover, Menindee clover, calomba, Darling trigonella, sweet fenugreek, channel clover, sweet-scented clover and Australian shamrock.
Mesorhizobium amorphae is a species of root nodule bacteria first isolated from Amorpha fruticosa species in China. It is purported to be native to American soil. Its genome has been sequenced. Its type strain is ACCC 19665.
Mesorhizobium mediterraneum is a bacterium from the genus Mesorhizobium, which was isolated from root nodule of the Chickpea in Spain. The species Rhizobium mediterraneum was subsequently transferred to Mesorhizobium mediterraneum. This species, along with many other closely related taxa, have been found to promote production of chickpea and other crops worldwide by forming symbiotic relationships.
Lotus creticus is a species of perennial herb of the family Fabaceae found in tropical Africa. It is symbiosis-competent and engages in nitrogen-fixing symbiotic interactions with species of the Ensifer genus[3][3]. It comprises three varieties found in the Mediterranean. There is some controversy as to whether each subgroup could be considered the same species but are classically described as being subgroups. Varieties consist of the most commonly cited silky-hairy var. creticus, which is widely distributed in its western part of the coast; the non-silky var. glabrescens, which has a western Mediterranean distribution; and the eastern Mediterranean var. collinus, which is also not silky and can be described by long petioles and peduncles.
Argyrolobium uniflorum is a wild pluriannual herbaceous species of drought tolerant legume found in arid regions of Northern Africa sometimes described as pseudo-savannah. A. uniflorum is a hardy wild species of plant and it is considered a valuable forage crop for agriculture in Africa. It is also useful as a potentially important species in bioremediation and dryland restoration in arid regions of Tusinia which are sensitive to misappropriation and overgrazing.
