Individual glucosinolates in various organs of the Columbia ecotype of A. thaliana during development with special emphasis on changes occurring during seedling germination and leaf development. The major class of glucosinolates in the rosette leaves depended on their age. In the vegetative stage; 4-methylsulfinylbutyl glucosinolate (4MSOB) and other aliphatic glucosinolates contributed more than 80% of the total; with indole glucosinolates contributing the balance. However; the proportion of aliphatic glucosinolates declined withage resulting in the predominance of indole glucosinolates; mostly indol-3-ylmethyl glucosinolate (I3M) and its 1-methoxyl derivative (1MOI3M); by the time of senescence (Brown et al. 2003)