What is Brassinolide

In 1979, American scholars harvested 227kg of rape pollen by bee collection, and obtained 4mg of brassinosteroid after separation and purification. Through instrumental analysis, it was determined that its chemical structure belonged to sterolide. Therefore, it was named brassinosteroid, also known as brassinosteroid (brassinolide, bl for short). The stereostructural formula of brassinosteroid was analyzed by mass spectrometry, infrared and X-ray crystals. Its chemical names were 2a,3a,22a,23a-4 Hydroxy-24a Methyl-B-homo-7-oxo-5a-cholesten-6 one. So far, about 70 natural brassinolide compounds have been found and synthesized as brassinosteroids.
(brssinosteroid,br)br is widely found in plants. Because their functions are similar to bl, br has become a synonym for brassinosteroids, and bl is a highly active molecule among brassinosteroids. In 1998, the 13th International Annual Meeting of Plant Growth Substances was officially recognized as the sixth class of plant hormones. The effects of brassinolide on plant growth and development include: promoting seed germination (and promoting cell expansion and cell division in stems and leaves; both promoting and inhibiting root growth; promoting xylem differentiation during duct development; and also an essential component for pollen tube growth. In crop resistance, disease prevention, repair of fruit tree degradation function, reduce the heavy metal content of plants, improve the growth function of crops in saline soil, etc.