anatomy of flowering plants Flashcards
plant anatomy
study of internal structures in their organisation
father of plant anatomy
N. grew
TISSUE -
group of cells
origin of tissues
common
function
specific
cell shape
similar or dissimilar
plant tissue divided into
Meristematic and permanent tissue
meristematic tissue
dividing
permanent tissue
non-dividing
function of meristematic tissue
growth of plant body
functions of permanent tissue
absorption,photosynthesis,conduction,protection.food storage.
types of meristem based on origin
primary and secondary
origin of primary tissue
embryonic meristem
origin of secondary meristem
by de-differentiation of permanent tissue
function of pmt
primary growth
function of smt
secondary growth
types of meristem based on their position and location
1=apical meristem 2= intercalary meristem 3= lateral meristem -vascular cambial ring -cork cambium
origin of apical meristem
primary
apical meristem is divided into
- shoot apical meristem
- root apical meristem
position of sam
axis of shoot(stem)
position of ram
sub-apical or sub-terminal
functions of sam
- primary growth
- forms leaf primordia on lateral side
- some cells left behind and form axillary bud
functions of ram
- forms root axis
- forms root cap
2= intercalary meristem
developed from
separation of meristematic cells from apical meristem
origin
primary
location
between permanent tissue
-near to apical meristem
functions of intercalary meristem
- help in primary growth
- internodal elongation
- regeneration of grasses
- growth of leaf
3=lateral meristem
- position
along or parallel to longitudinal axis
function
secondary growth
PERMANENT TISSUE
divided into
simple | complex
PARENCHYMA also known as
soft tissue | universal tissue | fundamental tissue | most distributed tissue | first evolved tissue
cells
protoplasmic
shape
spherical , oval , polygonal , elongated ,
cell wall
- cellulosic
- thin
- flexible
- pit field present
non- mechanical tissue
special modifications of parenchyma
chlorenchyma
- green parenchyma
- photosynthetic
chlorenchyma also known as
mesophyll
present in
middle of leaf
Aerenchyma
found in hydrophytes
- intercellular spaces filled with air
idioblast
special storage cells
epidermis
non green
storage
- food material
- potato tuber
- cortex
- endodermis of stem
- pith/medulla
_ COLLENCHYMA_
thick at corner
|deposition of pectocellulose
functions
assimilatory (photosynthetic)
-provide mechanical strength
SCHLERENCHYMA
hard tissue
non-protoplasmic
functions-
provide mechanical strength
types
schlerides | schlerenchymatous