Abstract: The composition and content of glucosinolates ( GSs) in young leaves and bolting stems ofChinese kale (Brassica alboglabra Bailey) were analyzed by HPLC. Ten kinds of GSswere identified in both parts, including six aliphatic GSs ( 3-methylsulfinylpropyl GS, 2-hydroxybut-3-enyl GS, 2-propenyl GS, 4-methylsulfinylbutyl GS, 5-methylsulfinylpentyl GS and 3-butenyl GS) and four indolyl GSs (4-hydroxyindol-3-ylmethyl GS, indol-3-ylmethyl GS, 4-methoxyindol-3-ylmethyl GS and neoindol-3-ylmethyl GS). 3-methyl-
sulfinylp ropyl GS, 2-propenyl GS and 5-methylsulfinylpentyl GS were firstly detected in Chinese kale. Total content of GSs in bolting stemswas 4 907.1μg·g^{- 1}DM, being 4.57 folds as that in leaves. The main individual GS was 3-butenyl GS, accounting for 56.46% and 60.37% of the total GSs in leaves and bolting stems, respectively. The minor individual GS was indol-3-ylmethyl GS, accounting for 18.85% and 11.10% of the total GSs in leaves and bolting stems, respectively. And 5-methylsulfinylpentyl GS was present at the
lowest amount, only accounting for 0.26% and 0.39% of the total GSs in leaves and bolting stems, respectively. The relative p roportion of aliphatic GSs in leaves was lower than in bolting stems, and that of indolyl GSs in leaves was higher than in bolting stems.

Key words: Chinese kale (Brassica alboglabra), Leave, Bolting stem, Glucosinolate