Changes in the contents of glucosinolates during crop development in different parts of rapeseed varieties

摘要

Changes in the amounts of individual glucosinolates (GSL) in Japanese rapeseed (Brassica napus L.) varieties were measured in the vegetative and reeproductive tissues. Three zero erucic cultivars (Asakanonatane, Nanashikibu, Kizakinonatane)and one double-low cultivar (Kirariboshi) were used. The GSL contents were largely different depending on the plant parts,developing stage and cultivars. Progoitrin and gluconapin were mainly found in the seeds. Their contents were different among cultivars. In the non double-low (single-low) varieties, their contents did not change or increased to some extent with maturing.And the double-low variety, Kirariboshi, contained almost no progoitrin or gluconapin throughout its growth stages.Glucobrassicanapin, glucobrasscin and gluconasturtiin were found in all four varieties, mainly detected in their roots. Even in the double-low variety, Kirariboshi, they were detected. The content of glucobrassicin in the roots tended to decrease with maturing.And that of gluconasturtiib was similar in all cultivars at harvest time. But the patterns of its change were different among the cultivars. In Kizakinonatane, its content was decreased with maturing. In Asakanonatane, Kirariboshi and Nanashikibu, it did not change largely. These results showed that GSL contents in Japanese rape (Brassica napus L.) were different among plant parts,maturing stage and cultivars. And it was found that even a double-low variety contained some GSL in the roots. More information is needed for clarifying if the GSL in the roots have some effects or physiological function on the subsequent crops.