Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Diagram of the samples collected from the flax stem. Abbreviations: SAM, shoot apical meristem; cPAR, cortical parenchyma; iFIB, phloem fibers at the stage of intrusive elongation; sXYL, stem xylem with secondary cell wall; tFIB, phloem fibers with tertiary cell walls; PCW, primary cell wall; SCW, secondary cell wall, TCW, tertiary cell wall.
