Cell wall matrix polysaccharide distribution and cortical microtubule organization: two factors controlling mesophyll cell morphogenesis in land plants

Annals of Botany
P SotiriouB Galatis

Abstract

This work investigates the involvement of local differentiation of cell wall matrix polysaccharides and the role of microtubules in the morphogenesis of mesophyll cells (MCs) of three types (lobed, branched and palisade) in the dicotyledon Vigna sinensis and the fern Asplenium nidus. Homogalacturonan (HGA) epitopes recognized by the 2F4, JIM5 and JIM7 antibodies and callose were immunolocalized in hand-made leaf sections. Callose was also stained with aniline blue. We studied microtubule organization by tubulin immunofluorescence and transmission electron microscopy. In both plants, the matrix cell wall polysaccharide distribution underwent definite changes during MC differentiation. Callose constantly defined the sites of MC contacts. The 2F4 HGA epitope in V. sinensis first appeared in MC contacts but gradually moved towards the cell wall regions facing the intercellular spaces, while in A. nidus it was initially localized at the cell walls delimiting the intercellular spaces, but finally shifted to MC contacts. In V. sinensis, the JIM5 and JIM7 HGA epitopes initially marked the cell walls delimiting the intercellular spaces and gradually shifted in MC contacts, while in A. nidus they constantly enriched MC contacts. In all M...Continue Reading

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Citations

Oct 5, 2018·Biology Letters·Gea GuerrieroChristopher Exley
Oct 19, 2019·International Journal of Molecular Sciences·Yanqiu YangDeshu Lin
May 9, 2021·Journal of Experimental Botany·Sebastian J AntreichNotburga Gierlinger
Aug 5, 2021·Journal of Biological Research·Panagiotis ApostolakosBasil Galatis
Dec 7, 2021·PLoS Biology·Christopher D Whitewoods

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