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Article Addendum
The transcription factor MtSERF1 may function as a nexus between stress and development in somatic embryogenesis in Medicago truncatula
Feky R. Mantiri, Sergey Kurdyukov, Shih-Kuang Chen and Ray J. Rose
volume 3 | issue 7
july 2008Pages: 498 - 500
This is an open-access article
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In Medicago truncatula high rates of somatic embryo formation can be induced in the Jemalong genotype 2HA by application of the hormones auxin and cytokinin. Biosynthesis of the stress-related hormone ethylene is also necessary for somatic embryogenesis (SE) and is most likely a response to wounding and the presence of auxin in the medium. We have demonstrated that expression of a gene designated Mt SOMATIC EMBRYO RELATED FACTOR 1 (MtSERF1) induced by ethylene, in the presence of auxin plus cytokinin, is essential for SE. The promoter region of this transcription factor, a member of the ERF sub-family of the AP2/ERF super family, contains putative binding sites for auxin and cytokinin in addition to ethylene. An additional finding was the presence of WUSCHEL (WUS) binding sites in the MtSERF1 promoter region, which is discussed. Here we also discuss the Medicago data in the context of embryogenesis studies in Arabidopsis and suggest that MtSERF1 has a key developmental role, possibly in conjunction with WUS, in regulating downstream genes required for the initiation of SE.
Addendum to: Mantiri FR, Kurdyukov S, Lohar DP, Sharopova N, Saeed NA, Wang X-D, VandenBosch KA, Rose RG. The transcription factor MtSERF1 of the ERF subfamily identified by transcriptional profiling is required for somatic embryogenesis induced by auxin plus cytokinin in Medicago truncatula. Plant Physiol 2008; 146:1622-36.
Authors
Feky R. Mantiri
The University of Newcastle
Sergey Kurdyukov
The University of Newcastle
Shih-Kuang Chen
The University of Newcastle
Ray J. Rose
The University of Newcastle
This is an open-access article
Download PDFIf the document does not open, please right-click on the link (control-click on a Macintosh) and select the option to save the file to disk.