Developmental regulation of a plasma membrane arabinogalactan protein epitope in oilseed rape flowers

We have identified and characterized the temporal and spatial regulation of a plasma membrane arabinogalactan protein epitope during development of the aerial parts of oilseed rape using the monoclonal antibody JIM8. The JIM8 epitope is expressed by the first cells of the embryo and by certain cells in the sexual organs of flowers. During embryogenesis, the JIM8 epitope ceases to be expressed by the embryo proper but is still found in the suspensor. During differentiation of the stamens and carpels, expression of the JIM8 epitope progresses from one cell type to another, ultimately specifying the endothecium and sperm cells, the nucellar epidermis, synergid cells, and the egg cell. This complex temporal sequence demonstrates rapid turnover of the JIM8 epitope. There is no direct evidence for any cell-inductive process in plant development. However, if cell-cell interactions exist in plants and participate in flower development, the JIM8 epitope may be a marker for one set of them.

Janniche, LuiseJohn Innes Centre (author)
Kjellbom, PerLund University,Lunds universitet,Biokemi och Strukturbiologi,Centrum för Molekylär Proteinvetenskap,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Biochemistry and Structural Biology,Center for Molecular Protein Science,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)pbio-pkj (author)
Scofield, Graham N.John Innes Centre (author)
Peart, Janet M.John Innes Centre (author)
Roberts, KeithJohn Innes Centre (author)
University College LondonJohn Innes Centre (creator_code:org_t)

By the author/editor: Pennell, Roger I ...; Janniche, Luise; Kjellbom, Per; Scofield, Graham ...; Peart, Janet M.; Roberts, Keith

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