Morphology Of Flowering Plants Video Lecture | Additional Study Material for Class 11

morphology of flowering plants the plant
body of an angiosperm the plant body of
an angiosperm primarily consists of an
axis which is differentiated into an
underground root system and an aerial
chute system the roots firmly fix the
plant in the soil and help in the
absorption of water and minerals from
the soil the aerial chute system
consists of a main stem lateral branches
leaves flowers fruits and seeds on the
hill the root stem and leaves are called
vegetative organs as they are concerned
with nutrition and grow while the
flowers fruits and seeds are called
reproductive organs as they are
concerned with reproduction
functions of the root system the primary
function of the roofs is Anchorage and
absorption however in some plants roots
get modified to perform specialized
functions visuals of some of the
modified roots are shown here in the
banyan tree prop roots support the huge
tree in sugar cane stilt roots support
the slender weak stem in rhizophora
pneumatophores help to obtain oxygen
from the atmosphere in leguminous plants
not you later droops help in nitrogen
fixation in carrot radish and turnip
roots act as storage organs and store
food
functions of the stem the primary
function of the stem is to spread out
branches bearing leaves flowers and
fruits they also help in the conduction
of water and mineral salts and carry out
photosynthetic activity in some plants
stems are modified to perform certain
specialized functions like storage as
seen in potato ginger turmeric etc
support to weak stems in the form of
tendrils as in cucumber protection in
the form of horny thorns as in
Bougainville and vegetative propagation
in the form of rana as in grass
Bart's offer leave the visual above
shows the parts of a leaf a leaf is a
flattened lateral outgrowth born on the
node of a stem typically it is green in
color and is the chief photosynthetic or
consists of three parts namely leaf base
petiole and lamina the lowermost part of
the leaf by which the leaf is attached
to the node of the stem is the leaf base
it is protective in function petiole is
the stalk of the leaf it raises the
lamina to maximum exposure of sunlight
lamina is the green expanded portion of
the leaf it is the main seed of
photosynthesis
Bath's offer typical flower the flower
is the reproductive unit in angiosperms
it is concerned with sexual reproduction
a typical flower as illustrated here has
four different worlds which are arranged
successively on the swollen end of the
pedicle called thalamus the outermost
whirl is the calyx whose individual
units are called sepals inner - this is
the corolla which is represented by
petals these two walls are called the
accessory whirls the next wall is the
Andrew zoom which consists of the anther
and filament the fourth and innermost
wall is the Guyanese ium which consists
of ovary style and stigma these two
walls are called the reproductive Falls
the fruit we always associate fruits to
be sweet and juicy
botanically a fruit is defined as a
ripened ovary which generally develops
after fertilization the main function of
a fruit is to protect the seeds and help
in their dispersal let us take mango as
a typical example to study the parts of
a fruit a fruit consists of a fruit wall
or pericarp
and seeds the pericarp may be dry or
fleshy when fleshy it is differentiated
into an outer epoch our middle mezzo
carb and innermost endocarp
enclosing the seed
the seeds in angiosperms seeds are
enclosed within the fruits they
developed from ovules after
fertilization and are the principal
means of perpetuation of the species two
types of seeds are noticed in
angiosperms namely monocotyledonous seed
and dicotyledons seed the differences
between the two are tabulated here
relate the points of difference among
the two along with their respective
visuals
you
Florin formula of a flower this diagram
shows the floral formula of a flower a
floral diagram is a diagrammatic
representation of theoretical transfer
section of a flower in relation to the
model axis it shows many characters of a
flower on the other hand a floral
formula is a symbolic representation of
floral characters of a flower