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What is 14-hydroxylated Brassinosteroid (Natural Brassinolide)?

Post time:2019-08-21 15:08:33 Resource:NewSun Chick:211

What is 14-hydroxylated Brassinosteroid (Natural Brassinolide)?

1. What is Brassinolide

Brassinolide and its analogs, as the endogenous plant hormone, are different from the other five plant hormones and have unique physiological activities to the plants. Compared with Auxin, Cytokinin, Gibberellins, abscisic acid and ethylene, brassinolide has more comprehensive biological activities and lower dosage (PBM level), more safe (low toxicity), and has better results in increasing production and profit of agriculture. At the 16th International Conference of Plant Growth Substances in 1998, brassinolide was unanimously recognized as the sixth plant hormone in the world.

 

2. Discovery of Brassinolide

The discovery of brassinolide has a history of nearly 90 years. It was first discovered by USDA in 1930. Researchers discovered that plant pollen extracts can promote the growth of plant, which attracted the attention of American scientists.

In 1970, Mitchell extracted the growth substances from rapeseed pollens that can cause abnormal phenomena such as stem internode elongation and bending of the bean seedlings, and named it as Brassin, which has become the most classic method to detect the activity of Brassin. In 1972, Mitchell discovered that Brassin can promote the growth of many plants and different parts of plants, which attracted the attention of scientists in the field of plant protection all over the world. In 1979, Grove and Manava found Brassinolide (BL) in rape pollen, which was the first natural Brassinolide monomer isolated from plant pollen. So far, scientists all over the world have isolated at least 70 natural brassinosteroids and their analogues from a large number of plant species. They call them brassinosteroids (BRs).

The typical biological activity that can cause the elongation, bending, swelling or division of the second internode of kidney bean is called Brassin Activity. Scientific call the plant hormone that has Brassin Activity Brassin.

 

3. Applications of Brassinolide

Brassinolide and its analogs were first used in Japan, but in a small scale. Large-scale commercial applications of brassinolide began in China. Since 1980, Chinese scientists have carried out the research and development of Brassinolide analogs, which are divided into two routes: natural extraction and chemical synthesis. Professor Jiang Jiexian of Jiangxi Institute of Technology (now Nanchang University) obtained the Natural brassinolide from rape beeswax and applied for the national invention patent. In 1984, it was appraised as the scientific and technological achievements. In the same year, the technology and product transion was carried out in Pujiang County, Sichuan Province, and good results were obtained.

Subsequently, new technologies such as enzymatic extraction from beeswax, enzymatic extraction from rape pollen have been developed and obtained national invention patents in China, PCT American patents and PCT Australian patents. Products were temporarily registered in the Ministry of Agriculture in the 1990s, formally registered in 2006, and got industry standards in 2014. The main active ingredient is 14-hydroxylated Brassinosteroid (Natural Brassinolide). Nowadays, Chengdu Newsun Crop Science Co., Ltd. is the largest natural brassinolide production enterprise in the world.