In the meristematic zone, named after the apical meristem,
the plant cells undergo rapid mitotic division, creating new cells for root growth
. These new cells, once they enter the zone of elongation, begin,unsurprisingly, to elongate, furnishing the root with added length.
What process takes place in meristem?
Meristems are regions in plants in which
mitosis
takes place. Apical meristems are at the tips of shoots and roots and contribute to increases in length. Lateral meristems are responsible for increases in girth.
What are the main features of meristematic tissue?
- They are composed of immature cells. …
- Absence of intercellular spaces.
- Cells are oval, rounded or polygonal in shape.
- Cells are always living and thin walled.
- Cells are rich in cytoplasm with minute vacuoles. …
- Cell is diploid and shows mitotic cell division.
What do you mean by meristematic areas?
The meristem (also called meristematic tissue) is
responsible for the growth of plants
. … The cells of meristematic tissue are usually small and thin-walled (with primary cell wall only). They are compact, leaving no intercellular spaces in between. They are a parenchymatous-type of cell.
What is meristem give an example?
A meristem is comprised of indeterminate, actively dividing cells that give rise to differentiated permanent tissues such as epidermis, trichomes, phellem, and vascular tissues. A meristem may be primary or secondary. … An example of a primary meristem is the
apical meristem
.
What are the 3 types of meristems?
There are three primary meristems: the protoderm, which will become the epidermis;
the ground meristem
, which will form the ground tissues comprising parenchyma, collenchyma, and sclerenchyma cells; and the procambium, which will become the vascular tissues (xylem and phloem).
What are the four characteristics of meristematic tissue?
- (i) Cells divide repeatedly.
- (ii) Cell walls are thin.
- (iii) Vacuoles are not found.
- (iv) Metabolically very active.
- (v) They have dense cytoplasm.
- (vi) They have prominent nucleus.
What are the functions of permanent tissue?
The permanent tissue in plants mainly helps in
providing support, protection as well as in photosynthesis and conduction of water, minerals, and nutrients
. Permanent tissue cells may be living or dead.
What is permanent tissue class 9?
Permanent tissues in a plant are
those tissues that contain non dividing cells
. The cells are also modified to perform specific functions in the plants. The cells of the permanent tissue are derived from the meristematic tissue.
What is the other name of Aerenchyma?
Aerenchyma or
aeriferous parenchyma
is a modification of the parenchyma to form a spongy tissue that creates spaces or air channels in the leaves, stems and roots of some plants, which allows exchange of gases between the shoot and the root.
What is the other name of meristematic tissue?
Answer: tissues. Explanation: Meristematic tissue or
meristems
, as they are also called are tissues that have the ability to enlarge, stretch and differentiate into other types of cells as they mature.
What are the types of meristematic cells?
There are three types of meristematic tissues:
apical (at the tips), intercalary or basal (in the middle), and lateral (at the sides)
.
What is the main function of Chlorenchyma?
The chlorenchyma are parenchymal cells that comprise chloroplasts. The chlorenchyma hence serves as the cell
that promotes photosynthesis
. In the synthesis of these cells, the carbohydrates are at their maximum, including the pallisade cells, for distribution around the plant.
What is meristem and its types?
Meristematic tissues, or simply meristems, are tissues in which the cells remain forever young and divide actively throughout the life of the plant. … A plant has four kinds of meristems: the
apical meristem and three kinds of lateral
—vascular cambium, cork cambium, and intercalary meristem.
What would happen if meristems are present in leaves?
Most plant meristems are located at the tips of shoots and roots and in cylindrical layers within stems and roots. What could happen if they were present in leaves?
The SAM gives rise to leaves and flowers
. The cell division in the meristem generate new cells for expansion and differentiation of new tissue.
Why are meristems virus free?
The reasons for the meristem to be free from the virus:
Meristem has continuously and rapidly dividing cells
. These cells have a high rate of metabolism and viruses cannot replicate in such cells. Most of the viruses migrate through Vascular elements but at the tip/meristem region, vascular elements are not formed.
