|Budget Amount *help
¥1,300,000 (Direct Cost : ¥1,300,000)
Fiscal Year 1994 : ¥500,000 (Direct Cost : ¥500,000)
Fiscal Year 1993 : ¥800,000 (Direct Cost : ¥800,000)
The purpose of this study is to use the metabolic intermediate in leaf and stem for early diagnosis of soil borne disease. Glycoalkaloids contents in potato were investigated for the indicator of potato scab infection.
1.The change of Glycoalkaloids contents in potato tubers, in case of greening by sun light, that treatment was done instead of disease infection, were investigated.
The Glycoalkaloids content in potato tubers of disease resistant variety was higher than susceptible variety.
Analyzed Glycoalkaloid's components were alpha-Solanine and alpha-Chaconine. The increasing rate of alpha-Chaconine in potato tubers by greening, was higher than alpha-Solanine content.
From these results, it is assumed that the step of Glycoalkaloids increasing start from the increase of alpha-Chaconine and then it transfer to alpha-Solanine increase.
These increase of Glycoalkaloids in the potato tubers by greening shows that the total Glycoalkaloids have the function of phytoalexins.
2.The contents of Glycoalkaloids in leaves of each position on stem were that the three leaves from top were much more Glycoalkaloids contained than lower leaves, these contents shows much Glycoalkaloids accumulate in upper leaves.
The content of Glycoalkaloids in leaves of two potato variaties were investegated. The variety of Dejima, it is more susceptible for potato scab, contained more less Glycoalkaloids than none susceptible variety, May Queen.
In this study, We could confirmed the positive relation between the contents of Glycoalkaloids and infection susceptibility on potato scab.