Graduate School of Biological Sciences, Nara Institute of Science and Technology, Takayama, Ikoma, Japan.
Plant Signal Behav. 2012 Nov;7(11):1506-8. doi: 10.4161/psb.22080. Epub 2012 Sep 18.
Stem cells in the vegetative shoot apical meristem proliferate to produce more stem cells (self-renewal) and are simultaneously consumed to form leaf promordia. Therefore, to keep a stable number of stem cells, regulation of the balance between their proliferation and consumption is important. Recently we reported that stem cell population is increased in mutant plants lacking the entire ERECTA (ER) receptor kinase family. Here we describe that loss of function of the entire ER-family causes a decrease in leaf number in spite of the increase in stem cell population. This suggests that stem cell consumption might be decreased in the mutant, and this could be one of reasons why stem cell population appears to be increased. This situation is in sharp contrast to clv3 mutant, which also shows an increase in stem cell population but does not show a decrease in leaf production. We briefly discuss differences between the er-family mutant and the clv3 mutant.
营养芽分生组织中的干细胞增殖以产生更多的干细胞（自我更新），同时被消耗以形成叶原基。因此，为了保持稳定的干细胞数量，调节其增殖和消耗之间的平衡很重要。最近我们报道说，缺乏整个 ERECTA（ER）受体激酶家族的突变体植物中的干细胞群体增加。在这里，我们描述了整个 ER 家族的功能丧失会导致尽管干细胞群体增加，但叶片数量减少。这表明突变体中干细胞的消耗可能减少，这可能是干细胞群体似乎增加的原因之一。这种情况与 clv3 突变体形成鲜明对比，clv3 突变体也显示出干细胞群体增加，但叶片产量没有减少。我们简要讨论了 er 家族突变体和 clv3 突变体之间的差异。
