Veg. shoot apex β dome shaped (1) outer β tunica β anticlinally β surface growth β epidermis & cortex.
Inner β corpus - in volume β cortex & vascular bundles
Types of Shoot Apex
Nageli β Apical cell theory β applied to algae, bryophytes & Pteridophytes.
Histogen Claasification
At site of leaf initiation β increase in RNA contents of cell.
Quiescent Centre β root β inactive region β low DNA, RAN & protein β reservoir of resistant cells.
Parenchyma β metabolically active, (store β idioblast), In Succulents -mucilage
Collenchyma β absent in roots & monocot plants, turgidity.
Collenchyma angular β Datura, Cucurbits, Solanum
Collenchyma lacunar β Asteracecae.
Collenchyma lamellar β Rhombus.