Abstract.
Antibodies were used to localise polysaccharide and protein networks in the protoxylem of etiolated soybean (Glycine max L.) hypocotyls. The deposition of glycine-rich proteins (GRPs) starts in the cell corners between protoxylem elements and xylem parenchyma cells. Finally, the GRPs form a network between two mature protoxylem elements. The network also interconnects the ring- and spiral-shaped secondary wall thickenings, as well as the thickenings with the middle lamellae of living xylem parenchyma cells. In addition to the GRP network, a polysaccharide network composed mainly of pectins is involved in the attachment of the secondary wall thickenings to the middle lamellae of xylem parenchyma cells.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Electronic Publication
Rights and permissions
About this article
Cite this article
Ryser, U. Protoxylem: the deposition of a network containing glycine-rich cell wall proteins starts in the cell corners in close association with the pectins of the middle lamella. Planta 216, 854–864 (2003). https://doi.org/10.1007/s00425-002-0938-7
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s00425-002-0938-7