All Sources -
Updated Media sources (1) About encyclopedia.com content Print Topic
protoxylem The primary xylem tissue that is formed in the expanding region of roots and shoots before the shoot or root has completed the elongation process. In the secondary walls of these vessels the lignin is deposited in rings and spirals, which allows for further elongation. The protoxylem is succeeded by metaxylem.
More From encyclopedia.com
Scrub Vegetation , Skip to main content scrub vegetation Oxidative Decarboxylation , Skip to main content Sacral Vertebrae , Skip to main content sacral vertebrae Atmophile , Skip to main content atmophile Infralittoral Fringe , Skip to main content infralittoral fringe Pseudocarp , Skip to main content pseudocarp
You Might Also Like