Regulation of IPT gene under control of senescence activated promoter

将衰老激活启动子PSARK控制下诱导细胞分裂素生物合成调节基因IPT的嵌合基因（PSARK-IPT）导入矮牵牛、菊花等花卉植物中，观察其货架期。结果，在储存和运输过程中存在叶片黄化问题的“Seikonomakoto”菊花中，从PSARK-IPT导入的转基因植物收获的切花显示出明显延迟的叶片黄化。即使在黑暗条件和乙烯暴露下，它们也表现出延迟的叶片衰老。这些结果为培育耐逆、长寿命的花卉品种，降低成本、节约能源、经济运输提供了重要的参考。

Chimeric gene that induced cytokinin biosynthesis regulating gene IPT under the control of senescence activated promoter PSARK (PSARK-IPT) was introduced into floricultural plants such as petunia and chrysanthemum and their shelf-life were observed. As results, in 'Seikonomakoto' chrysanthemum which has a problem of leaf-yellowing during storage and transportation, cut flowers harvested from PSARK-IPT introduced trangenic plants showed markedly delayed leaf-yellowing. They also showed delayed leaf-senescence even under dark condition and ethylene exposure. These results provide valuable information for breeding floricultural plants with stress-tolerance and long-self life that would lead to low cost, energy saving and economical transportation.