Protection Systems in Plant Cells -- A Mechanism of Apoptosis with Monoterpenoids

investigate the defense mechanism of plant cells against chemical stress我们有screened various isoprenoids for inducers of apoptosis in cultured plant cells such astabacco, chamomile, celery, soybean，这些研究已经revealed that geraniol has the most potent apoptosis-inducingactivity, as judged from DNA fragmentation in the cells. However，D16 - D1-（Δ D12 - D1-isopentenyl）adenosine and kinetin prevented the geraniol-induced DNAfragmentation in the cells.Furthermore, cycloheximide and actinomycin D，inhibitors of protein and RNA syntheses, respectively没有suppress the apoptosis of the plant cells. This result suggests that the apoptotic processinduced by geraniol does not require the synthesis of new proteins。

To investigate the defense mechanism of plant cells against chemical stress, we have screened various isoprenoids for inducers of apoptosis in cultured plant cells such as tabacco, chamomile, celery, soybean, and liverwort. These studies have revealed that geraniol has the most potent apoptosis-inducing activity, as judged from DNA fragmentation in the cells. However, NィイD16ィエD1-(ΔィイD12ィエD1-isopentenyl)adenosine and kinetin prevented the geraniol-induced DNA fragmentation in the cells.Furthermore, cycloheximide and actinomycin D, inhibitors of protein and RNA syntheses, respectively, did not suppress the apoptosis of the plant cells. This result suggests that the apoptotic process induced by geraniol does not require the synthesis of new proteins.