title: Developmental features of cotton fibre middle lamellae in relation to cell adhesion and cell detachment in cultivars with distinct fibre qualities.
abstract: Cotton fibre quality traits such as fibre length, strength, and degree of maturation are determined by genotype and environment during the sequential phases of cotton fibre development (cell elongation, transition to secondary cell wall construction and cellulose deposition). The cotton fibre middle lamella (CFML) is crucial for both cell adhesion and detachment processes occurring during fibre development. To explore the relationship between fibre quality and the pace at which cotton fibres develop, a structural and compositional analysis of the CFML was carried out in several cultivars with different fibre properties belonging to four commercial species: Gossypium hirsutum, G. barbadense, G. herbaceum and G. arboreum.
  
  
  
  Cotton fibre cell adhesion, through the cotton fibre middle lamella (CFML), is a developmentally regulated process determined by genotype. The CFML is composed of de-esterified homogalacturonan, xyloglucan and arabinan in all four fibre-producing cotton species: G. hirsutum, G. barbadense, G. herbaceum and G. arboreum. Conspicuous paired cell wall bulges are a feature of the CFML of two G. hirsutum cultivars from the onset of fibre cell wall detachment to the start of secondary cell wall deposition. Xyloglucan is abundant in the cell wall bulges and in later stages pectic arabinan is absent from these regions.
  
  
  
  The CFML of cotton fibres is re-structured during the transition phase. Paired cell wall bulges, rich in xyloglucan, are significantly more evident in the G. hirsutum cultivars than in other cotton species.
authors.affiliation: Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK.
authors.forename: Mercedes C
authors.initials: MC
authors.lastname: Hernandez-Gomez
authors.affiliation: Bayer CropScience NV - Innovation Center, Technologiepark, 38, 9052, Ghent, Belgium.
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Runavot
authors.affiliation: Bayer CropScience NV - Innovation Center, Technologiepark, 38, 9052, Ghent, Belgium.
authors.forename: Frank
authors.initials: F
authors.lastname: Meulewaeter
authors.affiliation: Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK. J.P.Knox@leeds.ac.uk.
authors.forename: J Paul
authors.initials: JP
authors.lastname: Knox
mesh_terms: D002448:Cell Adhesion; D002473:Cell Wall / Q000737:chemistry; D032561:Cotton Fiber; D005838:Genotype; D005936:Glucans / Q000378:metabolism; D003368:Gossypium / Q000166:cytology* / Q000235:genetics / Q000378:metabolism; D011134:Polysaccharides / Q000378:metabolism; D014990:Xylans / Q000378:metabolism
chemical_list: D005936:Glucans; D011134:Polysaccharides; D014990:Xylans; C030080:araban; C029353:xyloglucan
keywords: CFML; Cell adhesion; Cell wall; Cotton fibre; Gossypium spp.; Middle lamella; Polysaccharides