抄録
Our previous research showed that the gene expression of Xylem Sap Lectin: XSP30 in root stele was circadian clock-controlled and the amplitude was up-regulated by the leaf-produced gibberellin in cucumber plant. In this research, GA-deficient mutant of Arabidopsis (ga3ox1/ga3ox2) was used to observe the effects of gibberellin in root area. Applying GA4 on shoot area of the GA-deficient mutant showed obvious promotion in seminal root elongation and also root branching. In order to find out if gene expression in root area is affected by GA4 application, the microarray analysis was performed on root samples of GA-treated or non-treated GA-deficient mutant. The results lead us to select several up and down-regulated genes which may be expressed in root and controlled by the shoot. The expressions of the selected genes were confirmed by real-time PCR. Some of them may be responsible in shoot-root interactions.
