68.寄生植物ヤセウツボ種子の発芽過程における特徴的な窒素代謝(口頭発表)

概要

論文の詳細を見る
Parasitic plants, Orobanche spp. and Striga spp. cause serious damage to the African and Mediterranean agriculture. An effective strategy for the parasitic weed control is desired for economical and humanitarian reasons. Reception of strigolactones which are released from roots of host plants is necessary for the parasitic plants to germinate. Metabolites profiling with GC/MS revealed that activation of metabolism occurred three days after GR24, a synthetic strigolactone, treatment in seeds of Orobanche minor. One of the metabolites, allantoin was found to decrease after GR24 treatment and inhibitors of allantoin metabolism reduced the germination rate of O. minor. Allantoin is used for nitrogen transport in leguminous plants. We found that glutamine was increased in parallel with the allantoin degradation in O. minor seeds. In Arabidopsis seeds, arginine is pooled as a nitrogen source but no correlation was found between the amounts of arginine and glutamine in the seeds of O. minor. We hypothesize that allantoin is pooled in O. minor seeds as a nitrogen source. This results will provide a new target for the parasitic weed control.
植物化学調節学会の論文
2008-10-06