Secondary growth in Dicot Stem by
Vascular Cambium
, Secondary Growth in Stems
• Responsible for
increase in girth
(diameter)
• Allows for much
greater size and
volume
• Great commercial
value (wood and
wood products)
P. Alaback
, Primary growth produces growth in length and development
of lateral appendages.
• Secondary growth is the formation of secondary tissues
from lateral meristems.
• It increases the diameter of the stem. In woody plants,
secondary tissues constitute the bulk of the plant. They take
part in providing protection, support and conduction of water
and nutrients.
• Secondary tissues are formed by two types of lateral
meristems, vascular cambium and cork cambium or
phellogen.
• Vascular cambium produces secondary vascular tissues
while phellogen forms periderm.
• Secondary growth occurs in perennial gymnosperms and
dicots such as trees and shrubs.
• It is also found in the woody stems of some herbs. In such
cases, the secondary growth is equivalent to one annual ring,
e.g., Sunflower.
Vascular Cambium
, Secondary Growth in Stems
• Responsible for
increase in girth
(diameter)
• Allows for much
greater size and
volume
• Great commercial
value (wood and
wood products)
P. Alaback
, Primary growth produces growth in length and development
of lateral appendages.
• Secondary growth is the formation of secondary tissues
from lateral meristems.
• It increases the diameter of the stem. In woody plants,
secondary tissues constitute the bulk of the plant. They take
part in providing protection, support and conduction of water
and nutrients.
• Secondary tissues are formed by two types of lateral
meristems, vascular cambium and cork cambium or
phellogen.
• Vascular cambium produces secondary vascular tissues
while phellogen forms periderm.
• Secondary growth occurs in perennial gymnosperms and
dicots such as trees and shrubs.
• It is also found in the woody stems of some herbs. In such
cases, the secondary growth is equivalent to one annual ring,
e.g., Sunflower.
