Both of these cell types have thick, lignified secondary cell walls and are dead at maturity.
His system was based on the height of the lignified stem and on plant longevity.
The viable embryos germinate within three to four days after partial removal of the lignified seed coats.
As tracheophytes, trees have lignified tissues which transport resources such as water, minerals and photosynthetic products up and down the plant.
In the summer, when the earth has dried out, the leaves fall and the branches become naked and lignified with living fibers.
Sclerenchyma cells have thick lignified secondary walls and often die when mature.
The cell wall of a vessel element becomes strongly lignified, i.e. it develops reinforcing material made of lignin.
Alternatively, the presence of coarse and hypercoarse scratches along with gouges and large pits suggested the ingestion of foliage and lignified portions.
