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A new structural element containing glycine-rich proteins and rhamnogalacturonan I in the protoxylem of seed plants

Ryser, Ulrich ; Schorderet, Martine ; Guyot, Romain ; Keller, Beat

In: Journal of Cell Science, 2004, vol. 117, p. 1179-1190

The water pipes of elongating plant organs are the result of programmed cell death and are formed by the walls of dead and empty protoxylem elements. These protoxylem elements are passively elongated many times by the surrounding tissue before they are replaced and collapse. Well-known adaptations for this unique task include the characteristic secondary wall thickenings, forming rings and...