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/lp/springer_journal/ectopic-expression-of-ghcobl9a-a-cotton-glycosyl-phosphatidyl-inositol-z9AzB9Hf10
- Publisher
- Springer Journals
- Copyright
- Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
- Subject
- Life Sciences; Plant Genetics and Genomics; Human Genetics; Microbial Genetics and Genomics; Animal Genetics and Genomics; Biochemistry, general
- ISSN
- 1617-4615
- eISSN
- 1617-4623
- DOI
- 10.1007/s00438-018-1452-3
- pmid
- 29869696
- Publisher site
- See Article on Publisher Site
Abstract
Cellulose is a major component of plant cell walls and is necessary for plant morphogenesis and biomass. COBL (COBRA-Like) proteins have been shown to be key regulators in the orientation of cell expansion and cellulose crystallinity status. To clarify the role of a cotton COBL gene, GhCOBL9A, we conducted the ectopic expression and functional analysis in Arabidopsis. Previous study showed that GhCOBL9A was preferentially expressed during secondary cell wall biosynthesis in cotton fibers, and showed a significant co-expression pattern with cellulose synthase genes. Here, we detected that overexpression of GhCOBL9A induced the up-regulation of genes related to cellulose synthesis and enhanced the cellulose deposition. As a result, GhCOBL9A transgenic plants displayed increased hypocotyl and root lengths in early development, and cell wall thickening at the SCW stage. Notably, overexpression of GhCOBL9A led to an erect, robust-stature phenotype and brought higher biomass in mature plants. In addition, overexpression of GhCOBL9A in Arabidopsis AtCOBL4 mutants, a paralogous gene of GhCOBL9A, also led to a stronger growth potential, but the Atcobl4 mutant phenotype could not be rescued, implying the functional divergence of GhCOBL9A and AtCOBL4 paralogs. Taken together, these results suggest that overexpression of GhCOBL9A contributes to plant cell elongation and thickening, and increased biomass, which provides references for further utilizing GhCOBL9A to improve yield and quality traits in cotton and other species.
Journal
Molecular Genetics and Genomics – Springer Journals
Published: Jun 5, 2018
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