A cotton NAC domain transcription factor, GhFSN5, negatively regulates secondary cell wall biosynthesis and anther development in transgenic Arabidopsis
In this study, roles of GhFSN5 were dissected. qRT-PCR analysis showed that GhFSN5 was predominantly transcribed during the fiber SCW thickening stage. In addition, a large number of fiber SCW biosynthetic genes and SCW-related TFs were co-expressed with GhFSN5. Heterologous expression of GhFSN5 in Arabidopsis resulted in plants with smaller siliques and severe sterility. Anther dehiscence in transgenic lines was not substantially affected, but most pollen was collapsed and nonviable. Furthermore, cellulose and lignin contents in inflorescence stems as well as roots were reduced in transgenic lines, compared with the wild type. Moreover, a set of SCW biosynthetic genes for cellulose, xylan and lignin and several transcription factors involved in regulation of SCW formation were down-regulated in transgenic plants. Our findings indicate that GhFSN5 acts as a negative regulator of SCW formation and anther development and expands our understanding of transcriptional regulation of SCW biosynthesis.
Date: Friday, 12 13, 2019; Speaker: various; Building 38; 2nd floor conference room B
Date: Tuesday, 12 17, 2019; Speaker: Dr. Erin Beck, NINDS; Dr. Kenneth Tyler, University of Colorado School of Medicine; Building: Building 10 (Clinical Center); Lipsett Auditorium; CME Credit
Date: Tuesday, 01 07, 2020; Speaker: Daniel Neafsey, Assistant Professor, Harvard T.H. Chan School of Public Health; 5625 Fishers Lane; 5th Floor Conference Room
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