Delarue M, Prinsen E, Onckelen H V, Caboche M, Bellini C
Laboratoire de Biologie Cellulaire, Versailles, France.
Plant J. 1998 Jun;14(5):603-11. doi: 10.1046/j.1365-313x.1998.00163.x.
A new auxin homeostasis gene in Arabidopsis called SUR2 has been identified. This gene, mapped to the bottom of chromosome 4, is defined by two recessive nuclear mutants designated superroot2 (sur2), which display several abnormalities reminiscent of auxin effects. A number of these characteristics are similar to the phenotype of the previously described auxin-overproducing mutant superroot1 (sur1); however, several lines of evidences reveal that the SUR2 gene defines a new key point in the regulation of endogenous auxin concentrations. The phenotype of the sur1 sur2 double mutant is additive. Analysis by gas chromatography coupled to mass spectrometry indicated increased levels of free indole-3-acetic acid correlated with a decreased level of bound auxin in the sur2 mutant. These results suggest that SUR2 may be involved in the control of auxin conjugation.
在拟南芥中已鉴定出一个名为SUR2的新的生长素稳态基因。该基因定位于4号染色体的末端，由两个隐性核突变体superroot2（sur2）定义，它们表现出一些类似于生长素效应的异常。其中许多特征与先前描述的生长素过量产生突变体superroot1（sur1）的表型相似；然而，多项证据表明SUR2基因定义了内源生长素浓度调节中的一个新关键点。sur1 sur2双突变体的表型是累加的。气相色谱-质谱联用分析表明，sur2突变体中游离吲哚-3-乙酸水平升高，而结合态生长素水平降低。这些结果表明SUR2可能参与生长素结合的调控。
