Premium
Biosynthesis and metabolism of brassinosteroids
Author(s) -
Fujioka Shozo,
Sakurai Akira
Publication year - 1997
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1997.tb03078.x
Subject(s) - brassinolide , catharanthus roseus , campesterol , metabolic pathway , metabolism , biosynthesis , biochemistry , biology , brassinosteroid , hydroxylation , secondary metabolism , sterol , phytosterol , botany , arabidopsis , enzyme , gene , plant growth , cholesterol , mutant
Natural brassinosteroids so far identified from various plant species include biosynthetic congeners of brassinolide, such as cathasterone, teasterone, 3‐dehydroteasterone, typhasterol and castasterone as well as another series of 6‐deoxoteasterone, 3‐dehydro‐6‐deoxoteasterone, 6‐deoxotyphasterol and 6‐deoxocastasterone. Using cell culture system of Catharanthus roseus , the outlines of biosynthetic pathways of brassinolide, via plant sterol of campesterol, have now been demonstrated. There are two pathways, named early C6‐oxidation pathway and late C6‐oxidation pathway, both of which would be operating in wide varieties of plants. Metabolic studies with various plant systems revealed multiple paths of metabolism such as hydroxylation, epimerization, side chain cleavage, reduction and conjugation with glucose and fatty acids. Recent progress of biosynthesis and metabolism of brassinosteroids is described.