Study on metabolic system and function of cis-zeatin in monocots

我们已经证明，cZ可以抑制种子根伸长并上调细胞分裂素诱导基因，其活性与tZ相当。我们鉴定了3种水稻cz - o -葡萄糖基转移酶，发现它们的过表达者表现出短茎表型、延缓叶片衰老和减少冠根数。这些结果强烈提示cZ活性对水稻生长发育具有生理影响。我们发现部分细胞分裂素受体定位于内质网膜。

We have demonstrated that cZ inhibits seminal root elongation and to up-regulates cytokinin-inducible genes, and its activities were comparable to those of tZ. We identified three rice cZ-O-glucosyltransferases and found that their overexpressors exhibited short shoot phenotypes, delay of leaf senescence, and decrease in crown root number. These results strongly suggest that cZ activity has a physiological impact on growth and development in rice. We demonstrated that a part of cytokinin receptors are localized in endoplasmic reticulum membrane.