Transcript Plant Growth Notesx

WARM UP
“The biggest dog has been a
pup.” –Joaquin Miller
1. What does this mean to you?
2. How can you relate this to
plants?
Plant Growth
Meristems
• Areas of
dividing
cells
• Found at
ends and
edges
Meristems
• Regions of growth
– Apical (length)
– Secondary (width)
Apical Meristems
• Primary growth - Length / height
Shoot Formation
• Leaf primordium – “baby leaves”
• Buds
Lateral Meristems
• Secondary growth
– Thickness
Lateral Meristems
• Vascular
cambium
– New
xylem/phloem
• Cork cambium
– New bark
Vascular Cambium
• Xylem made on
inner face,
phloem on outer
face
Vascular Cambium
• Growth
in
circular
layers
– Rings of
old
xylem
WRAP UP
• Explain how the
rings of a tree
are formed, using
the terms xylem,
vascular
cambium,
phloem, and cork
cambium.