Please enable JavaScript.
Coggle requires JavaScript to display documents.
Roots tree-roots (Others Types of Roots and Modifications # (Root Nodules…
Roots
External Structure of Roots
Organization of Root Systems
Have to be 100 of meter long
Have a significant surface area
Roots have an absorptive surface
Plants have a highly branched root system
Fibrous root system
Have lateral or branch roots
Adventitious Roots
Structure of individuals Roots
Roots and stem elongated
It is fairly simple structure
It has no leaves or leaf scars
Extreme tip pushes through soil
Functional Connection
Mucigel
Cause soil to release its nutrition
Complex polysaccharid
Lubricated passage of the Root
Internal Structure of Roots
#
Zone of maturation of root hair Zone
Merge with Zone of Maturation
Root hair grows outward
Process occurs simultaneously
increasing absorption of water and minerals
Root Cap
Have specific structure and growth pattern
Provide effective protection for apical meristem
It is at the Tip of a plant root
Enable downward growth of the Root
Mature Portions of the Roots
Have passage cells
Absorption of water and minerals
Function only for several days
Endodermis maturation
Have Root pressure
Root Apical Meristem
Has Quiescent Center
Regular files of cells can be seen to originate
Also known as Growing Tip
Growth of new cells in young seedlings at the tips of roots
Shoots and Forming buds
Zone of Elongation
#
Minerals penetrate deep into the Roots
Located behind the root apical meristem
Meristematic activity continues
Tissue are all quite permeable
Others Types of Roots and Modifications
#
Mycorrihizae
Grow by apical meristem and a cross section
Two types of relationship
ectomycorrihizal and endomycorrihizal
Aerial Roots of Orchids
Sign the plant is happy
Many orchids are epiphytic
Native tropical habitats to absorb moisture and nutrients
Plants lives in rainforest
Growing from the plant outside potting mix
Storage roots
In autumn most stem dies back to few nodes
Winter proof the shoots
Provides long term storage for carbohydrates
Prop Roots
More Vascular Bundle
Produce adventitious roots
extend the soil
Capable of expensive growth
Stem of monocot can become wider
Contractile Roots
Plants like Oxalis, Gladiolus, Crinum
Roots under go even more contraction
Becoming firmly anchored
Roots is firmly to the soil
Haustorial roots of parasitic flowing plants
They Subtract the body of another plants
Angiosperm are parasites on the plants
host absorbs the materials
Roots are largely modified
Roots of Strangler figs
#
Grows as epiphytes perched on a branch
Birds eat fruits of it
Root cling to the bark of the host tree
Root Nodules and Nitrogen Fixation
Have nitrogen fixation which is usable compound
Have limited main growth factor
Nitrogen is abundant in air
Very Oxygen sensitive
Formed in leguminous Plants
Physical Nitrogen Fixation and Biological Nitrogen Fixation
Origin and development of Lateral Roots
Extend Horizontally from the primary root
Serve to anchor the plant securely into the soil
contributes water uptake
provides nutrients for the growth and development
smaller vacuoles
Terminology Connection
structural Connection
Functional Connection
Mechanism Connection
