Meristems: the Construction Sites
Plant growth requires
centers of development which are meristems.
Apicalmeristems are centers of plant
development located on the very ends of roots(RAM) and stems (SAM).
They produce intermediate meristems (like procam-bium)
which form all primary tissues. Thelateral meristem or cambium orig-inates from the procambium which in turn originates
from apical meristems. It usually arises between two vascular tissues and its
main functions are thicken-ing and producing secondary vascular tissues.
Other meristems
include: intercalary which elongate
stems from the “mid-dle”, marginal
which are responsible for leaf development and repair meris-tems arising around wounds, they also control
vegetative reproduction.
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