Plant Tissue Flashcards
First land plants evolved when?
About ~420 millions years ago,
Group of cells of the same type or of the mixed type, having a common origin and performing an identical function.
Plant Tissues
Two groups of Plant Tissues
Meristematic
Permanent
Continuously Dividing
Found in Growing regions of Plant (Apices of roots and shoot)
Meristematic Tissue
Meristematic Tissues Based on Origin
Promeristem
Primary meristem
Secondary meristem
Meristematic Tissues Based on Location
Apical meristem
Intercalary meristem
Lateral meristem
Meristematic Tissues Based on Function
Protoderm
Procambium
Ground meristem
Youngest Stage of Growing Organ
Gives rise to primary meristem
Promeristem
Gives rise to epidermis, cortex, leaves, and the pith.
Embryonic Tissues
Primary Meristem
It develops later from non meristematic tissues at a certain stage of development of an organ of a plant.
Secondary Meristem
Main Factor in Primary and Secondary Meristems
Primary is Vertical
Secondary is Lateral
Located at tips of roots and shoots, increases height of plant.
Apical Meristem
Located at internodes or base of the leaves, increase in height.
Intercalary Meristem
Apical and Intercalary Meristems are both considered?
Primary Meristems
At the side of the stem and the root, it increases the thickness with the diameter.
Lateral Meristem
If Apical and Intercalary Meristems are both considered primary meristems, what is the lateral meristem considered as?
Secondary Meristem
Outermost plant tissue and forms the epidermis, located around the outside of the stem and protects the plants from any mechanical shocks.
Protoderm
Innermost tissue and gives rise to the xylem and phloem.
Procambium
Cells are large with thick walls. Gives rise to ground tissue.
Ground Meristem
Composed of cells that have lost the power of division, having attained
their definite form and sizes.
Permanent Tissue
Covers the plant and can be found on the outer layer of roots, stems and leaves.
Transpiration, gas exchange and first line of defense.
Dermal Tissue
Site for photosynthesis;
Supports vascular tissues and stores nutrients.
Ground Tissue
Ground Tissues:
Parenchyma
Collenchyma
Sclerenchyma
Photosynthesis, storage, and secretion
Parenchyma
