脂寡糖和生长素信号在烟草细胞中的汇聚途径。
Convergent pathways for lipochitooligosaccharide and auxin signaling in tobacco cells.
机构信息
Max-Planck-Institut für Züchtungsforschung, Carl-von-Linné-Weg 10, D-50829 Köln, Germany.
出版信息
Proc Natl Acad Sci U S A. 1996 Nov 12;93(23):13389-92. doi: 10.1073/pnas.93.23.13389.
Abstract
Lipochitooligosaccharides (LCOs) are a novel class of plant growth regulators that activate in tobacco protoplasts the expression of AXI1, a gene implicated in auxin signaling. Transient assays with a chimeric P(AXI)-GUS expression plasmid revealed that the N-octadecenoylated monosaccharide GlcN has all structural requirements for a biological active glycolipid, whereas the inactive N-acylated GalN epimer inhibits LCO action. Specific inhibition of LCO and auxin action shows that both signals are transduced within the tobacco cell via separate pathways that converge at or before AXI1 transcription. Cytokinin is suggested to be a common effector of LCO and auxin signaling. We also show that activation of AXI1 correlates with growth factor-induced cell division.
摘要
脂寡糖（LCOs）是一类新型的植物生长调节剂，可在烟草原生质体中激活 AXI1 的表达，该基因参与生长素信号转导。带有嵌合 P(AXI)-GUS 表达质粒的瞬时测定表明，N-十八烯酰化的单糖 GlcN 具有生物活性糖脂的所有结构要求，而无活性的 N-酰化 GalN 差向异构体抑制 LCO 作用。LCO 和生长素作用的特异性抑制表明，这两种信号都通过在烟草细胞内独立的途径进行转导，在 AXI1 转录之前或之时汇聚。细胞分裂素被认为是 LCO 和生长素信号传导的共同效应物。我们还表明，AXI1 的激活与生长因子诱导的细胞分裂相关。
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本文引用的文献
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