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Title: DRMY1, a Myb-Like Protein, Regulates Cell Expansion and Seed Production in Arabidopsis thaliana

Journal Article · · Plant and Cell Physiology
DOI:https://doi.org/10.1093/pcp/pcy207· OSTI ID:1609240
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [1];  [4];  [1]
  1. Department of Genetics and Biochemistry, Clemson University, Clemson, SC, USA
  2. DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, USA
  3. Clemson University Genomics Institute, Clemson University, Clemson, SC, USA
  4. College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China

Abstract Plant organ development to a specific size and shape is controlled by cell proliferation and cell expansion. Here, we identify a novel Myb-like Arabidopsis gene, Development Related Myb-like1 (DRMY1), which controls cell expansion in both vegetative and reproductive organs. DRMY1 is strongly expressed in developing organs and its expression is reduced by ethylene while it is induced by ABA. DRMY1 has a Myb-like DNA-binding domain, which is predominantly localized in the nucleus and does not exhibit transcriptional activation activity. The loss-of-function T-DNA insertion mutant drmy1 shows reduced organ growth and cell expansion, which is associated with changes in the cell wall matrix polysaccharides. Interestingly, overexpression of DRMY1 in Arabidopsis does not lead to enhanced organ growth. Expression of genes involved in cell wall biosynthesis/remodeling, ribosome biogenesis and in ethylene and ABA signaling pathways is changed with the deficiency of DRMY1. Our results suggest that DRMY1 plays an essential role in organ development by regulating cell expansion either directly by affecting cell wall architecture and/or cytoplasmic growth or indirectly through the ethylene and/or ABA signaling pathways.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
FC02-07ER64494
OSTI ID:
1609240
Journal Information:
Plant and Cell Physiology, Vol. 60, Issue 2; ISSN 0032-0781
Publisher:
Japanese Society of Plant Physiologists
Country of Publication:
United States
Language:
English

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