Sur2 mutations of Arabidopsis thaliana define a new locus involved in the control of auxin homeostasis
Sur2 mutations of Arabidopsis thaliana define a new locus involved in the control of auxin homeostasis
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DOI：
10.1046/j.1365-313x.1998.00163.x
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发表时间：
1998-06-01
期刊：
影响因子：
7.2
通讯作者：
Bellini, C
中科院分区：
文献类型：
--
作者：
Delarue, M;Prinsen, E;Bellini, C
在拟南芥中发现了一个新的生长素稳态基因SUR2。这个基因位于4号染色体的底部，由两个被命名为超级根t2 （sur2）的隐性核突变体定义，它们显示出一些让人想起生长素作用的异常。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，一系列证据表明，SUR2基因在调控内源性生长素浓度中定义了一个新的关键点。sur1 - sur2双突变体的表型是加性的。气相色谱-质谱联用分析表明，在sur2突变体中，游离吲哚-3-乙酸水平的增加与结合生长素水平的降低相关。这些结果提示，SUR2可能参与了生长素偶联的调控。
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.