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Daily glycome and transcriptome profiling reveals polysaccharide structures and correlated glycosyltransferases critical for cotton fiber growth. | LitMetric

AI Article Synopsis

  • Cotton fiber is essential for the textile industry, with fiber length and strength significantly influencing its quality, which relies on the dynamic changes in polysaccharide content during growth.
  • A comprehensive study using glycome profiling and transcriptome analysis highlighted important polysaccharide epitopes like RG-I pectin and heteroxylans that impact fiber quality through cell wall remodeling and strength.
  • The research aims to pinpoint specific genes related to polysaccharide synthesis that could enhance our understanding of fiber development and ultimately improve cotton production.

Article Abstract

Cotton fiber is the most valuable naturally available material for the textile industry and the fiber length and strength are key determinants of its quality. Dynamic changes in the pectin, xyloglucan, xylan, and cellulose polysaccharide epitope content during fiber growth contribute to complex remodeling of fiber cell wall (CW) and quality. Detailed knowledge about polysaccharide compositional and structural alteration in the fiber during fiber elongation and strengthening is important to understand the molecular dynamics of fiber development and improve its quality. Here, large-scale glycome profiling coupled with fiber phenotype and transcriptome profiling was conducted on fiber collected daily covering the most critical window of fiber development. The profiling studies with high temporal resolution allowed us to identify specific polysaccharide epitopes associated with distinct fiber phenotypes that might contribute to fiber quality. This study revealed the critical role of highly branched RG-I pectin epitopes such as β-1,4-linked-galactans, β-1,6-linked-galactans, and arabinogalactans, in addition to earlier reported homogalacturonans and xyloglucans in the formation of cotton fiber middle lamella and contributing to fiber plasticity and elongation. We also propose the essential role of heteroxylans (Xyl-MeGlcA and Xyl-3Ar), as a guiding factor for secondary CW cellulose microfibril arrangement, thus contributing to fiber strength. Correlation analysis of profiles of polysaccharide epitopes from glycome data and expression profiles of glycosyltransferase-encoding genes from transcriptome data identified several key putative glycosyltransferases that are potentially involved in synthesizing the critical polysaccharide epitopes. The findings of this study provide a foundation to identify molecular factors that dictate important fiber traits.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11629744PMC
http://dx.doi.org/10.1111/tpj.17084DOI Listing

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