Sabre Bean
Sword bean is a tropical under-utilized food legume. It is rich in proteins and is cultivated as a vegetable, green fodder for livestock, or dried beans are consumed by people. The plant has a wide distribution in the Eastern Ghats of South India, Nepal, Thailand, Malaysia, New Guinea, and northern Australia. In India, it is cultivated as a fodder crop in Northern India and Peninsular India.
Sword bean is an erect, twining herbaceous plant with slender stems. Stems are round in cross-section attaining about 4–10 m long, initially trailing along the ground but becoming more or less erect when they attain their full length; internodes up to 0.3 m long. Leaves are trifoliolate with a short petiole and leaflets oblanceolate, 8 – 25 cm long and 4 – 12 cm broad, apex acuminate. Flowers with the white or pale pink corolla, borne terminally or in axillary spikes 2–4 cm long; bracts leaflike. Fruit is oblong to ellipsoid, smooth pod 20 – 45 cm long and 10 – 20 mm wide, containing 5 -8 seeds. Seeds are flattened ovoids up to 7 cm long and 4 cm broad.
"C. gladiata" is an erect, twining herbaceous plant with slender stems. Stems are round in cross-section attaining about 4–10 m long, initially trailing along the ground but becoming more or less erect when they attain their full length; internodes up to 0.3 m long. Leaves are trifoliolate with a short petiole and leaflets oblanceolate, 8 – 25 cm long and 4 – 12 cm broad, apex acuminate. Flowers with the white or pale pink corolla, borne terminally or in axillary spikes 2–4 cm long; bracts leaflike. Fruit is oblong to ellipsoid, smooth pod 20 – 45 cm long and 10 – 20 mm wide, containing 5 -8 seeds. Seeds are flattened ovoids up to 7 cm long and 4 cm broad. Sword bean was first described as "Canavalia gladiata" by Carl Linnaeus in his 1763 work "Species Plantarum".
Sword bean, a tropical under-utilized food legume is cultivated as a vegetable and fodder crop. It is considered to be rich in proteins and has been found useful in the treatment of hypertension. Given these facts, the present investigation was undertaken to produce transgenic seed from sword bean cv. Vikas through Agrobacterium tumefaciens mediated transformation of the desi type. 1800 primary transformants were screened for transgenic events out of which 295 were found to be positive for GUS activity through histochemical staining of leaf sections.
Global sabre bean production
According to the Food and Agriculture Organization of the United Nations (FAO), the global production of sabre beans was approximately 1.3 million tonnes in 2016. The vast majority of this production took place in Africa, with Tanzania, Uganda, and Mozambique being the top three producing countries. Other major producing countries include Ethiopia, Rwanda, and Burundi.
Sabre beans are an important source of food and nutrition in many parts of Africa. They are a good source of protein, fibre, and essential vitamins and minerals. Sabre beans can be cooked and eaten whole, or they can be processed into flour or other products.
The global demand for sabre beans is growing, due to the increasing popularity of African cuisine and the growing population of Africa. The FAO estimates that the global demand for sabre beans will reach 2.1 million tonnes by 2025.