Please enable JavaScript.
Coggle requires JavaScript to display documents.
Tissues and primary growth of stem, Capture 5-6 # #, phloem # # - Coggle…
Tissues and primary growth of stem
External Organization of stem
Nodes & inter node
Leaf axil
Axillary bud
Bud scales
Terminal bud
Internal Organization of stem
Epidermis
#
Outermost surface
Single layer
Cortex
interior to epidermis
homogenous
Large intercellular air space
Strong tendency to float
Vascular tissue
Two types
Xylem
Conduct water
Pholem
Sugar & minerals
Different in plants from animals
Xylem
#
Tracheids
Elements
Phloem
#
Sieve cell
Sieve tube
Vascular bundle
Xylem and phloem occurs together
Located in interior cortex
one ring surrounds pith
Collateral
Stem Growth and differentiation
Shoot apical Meristem
Divides by mitosis &cytokinesis
Two daughter cell, half mother cell
Photoxylem
Metaxylem
Protophelem
Metaphelem
Basic Types of cell and tissues
Parenchyma
#
Thin primary cell
Contains soft plants part
Short distance transport
Function alive at maturity
involve in photosynthesis
Collenchyma
#
#
Uneven thicken primary cell
Function alive at maturity
Provide plastic support
involve in photosynthesis
Sclerenchyma
Primary &secondary wall
Function dies at maturity
provides elastic cupport
water transport
Two types
Mechanical Sclerenchyma
Sclereids
More/less
Isodiametric
Dies at maturity
Fibers
Long
Many types are dead
Involves in storage
Conducting Sclerenchyma
Tracheids
Long & narrow tapered end
No perforation
Dies at maturity
Vessel elements
Short & wide tapered end
Two perforation
Dies at maturity
Found in flowering plant
#
#
#
#
