CBSE Class 11 > Class 11 Videos > Roots Modification and Function : Morphology of Flowering Plants
Roots Modification and Function Morphology of Flowering Plants Video Lecture
FAQs on Roots Modification and Function : Morphology of Flowering Plants
| 1. What are the different types of modifications in roots? |  |
Ans. Roots can undergo various modifications to perform specific functions. Some common types of root modifications include taproots, adventitious roots, prop roots, and aerial roots. Taproots are the primary roots that grow vertically downwards and give rise to lateral roots. Adventitious roots arise from non-root parts of the plant, such as stems or leaves. Prop roots provide additional support to tall plants by growing from the lower nodes of the stem into the soil. Aerial roots develop above the ground and help in absorbing moisture from the air or provide additional support to the plant.
| 2. How do root modifications help plants in their functions? | |
Ans. Root modifications play a crucial role in enhancing the functions of plants. Taproots help in anchoring the plant firmly into the ground and provide stability. They also store food reserves and absorb water from deeper soil layers. Adventitious roots aid in vegetative propagation and provide support to the plant. Prop roots strengthen tall plants, such as maize or banyan trees, by providing additional support. Aerial roots help plants in obtaining moisture from the air or provide support in clinging to surfaces, such as in the case of ivy plants.
| 3. What is the function of root hairs in plants? | |
Ans. Root hairs are tiny, finger-like projections that emerge from the surface of the root epidermal cells. These hairs greatly increase the surface area of the roots, allowing for better absorption of water and nutrients from the soil. They play a vital role in the process of osmosis, where water moves from an area of higher concentration (soil) to an area of lower concentration (root cells). The root hairs also secrete certain enzymes that aid in the breakdown of organic matter present in the soil, facilitating nutrient absorption by the plants.
| 4. How are taproots different from fibrous roots? | |
Ans. Taproots and fibrous roots are the two main types of root systems in plants. Taproots have a primary root, also known as a main root, that grows vertically downwards and gives rise to lateral roots. This type of root system is typically found in dicot plants. In contrast, fibrous roots do not have a primary root. Instead, they consist of a dense network of thin, thread-like roots that arise from the base of the stem. Fibrous roots are commonly observed in monocot plants. Taproots provide better anchorage and storage of food reserves, while fibrous roots are efficient in absorbing water and nutrients from the upper soil layers.
| 5. What are the functions of aerial roots in plants? | |
Ans. Aerial roots serve various functions in plants. In epiphytic plants like orchids or mosses, aerial roots help in attaching the plant to trees or other surfaces. They absorb moisture and nutrients from the air, as these plants grow in environments where the soil is scarce or poor. Aerial roots in certain plants, such as mangroves, can absorb oxygen from the air and supply it to the submerged roots in waterlogged conditions. Some plants, like ivy, develop aerial roots that help in climbing and clinging to surfaces. Additionally, aerial roots can also function as storage organs for water and nutrients in certain plant species.
Text Transcript from Video
[Music]
brutes modifications and functions many
roots of peculiar form and functions are
known among angiosperms let us look at
the various modifications of roots we
will start with the taproot
modifications for storage of food the
fusiform root is the primary root that
is swollen in the middle and gradually
tapering towards the apex and the base
for example radish nappa form root is
the primary root that becomes
considerably swollen at the upper part
hypocotyl
it becomes almost spherical and sharply
tapering towards the lower end
for example beet in case of the conical
root the root is brought at the base and
it gradually tapers towards the apex
like a cone for example carrot in case
of the tuberous or tubercular root the
root becomes thick and fleshy but does
not maintain any specific shape for
example sweet potato then we have the
branch root modification pneumatophores
many plums growing in marshy places
especially in the tidal swamp forests
produce special roots which grew up into
the air from beneath the slime and
unknown as pneumatophores or breathing
roots
new metaphors arise from long horizontal
roots and as there- leader tropic they
grow vertically upwards projecting
several inches into the air they often
occur in large numbers around the trunk
of the tree there is a Khakee layer over
each root which covers even the apex and
the portion in the air there's numerous
lenticels pneumatophores form short
absorbing branches from their lower
portions and their root hairs are born
on these they are the Centers of active
respiration and their vertical growth
may be necessary to place the absorbing
roots at the most favorable level
examples are seen in rhizophora sana
rashia Hera tiara and avicennia let us
look at the modifications of
advantageous roots for storage of food
tuberous or to bycula roots are swollen
roots without any definite shape for
example in case of sweet potato fatha
culated roots refer to several
tubercular roots that occur in a cluster
at the base of the stem for example in
case of asparagus
[Music]
the modification in which the slender
route becomes suddenly swollen near the
apex is known as nodules fruit for
example in case of ginger the
modification in which there are some
swellings at frequent intervals the
roots are termed maurella form or beaded
roots for example in case of mom or dica
when the root possesses a series of ring
like swellings on its body it is known
as an annual ated root for example in
case of eye pockit cornea then we have
modifications of advantageous roots for
mechanical support crop roots are those
which develop from the main branches of
a tree and grow straight downwards to
enter the soil and form underground
branch roots for example in case of
ficus bengal ences the banyan tree as
the roots grow old the increase in
thickness due to secondary growth and
give support to the branches which
continue their horizontal growth
producing more prop roots at intervals
[Music]
adventitious roots sometimes form
supporting stills and are thus known as
stilt roots for example in case of fan
Dennis the maize plant has a tall
slender stem it develops a cluster of
roots from the first one or two nodes
above ground level which grow obliquely
downwards into the soil and give added
support to the stem
some tropical climbers like Piper battle
produce roots from their nodes and
Internode's
by means of which such plants attach
themselves to their support and climb
bit these roots cling closely to the
bark of the supporting tree to ensure a
foothold such roots secrete a kind of
sticky juice which quickly dries up in
the air as seen in Hedera helix in
Hadera adventitious roots are formed in
great numbers on the side of the stem
next to the support they attach
themselves to the support by the
formation of Mew cyllage from the
surface cells of the apex often the
roots form at their apex a disc like
structure or a sort of claw for a firm
foothold and hence are also called
clinging roots let us look at the
modifications of adventitious roots for
vital functions parasites among the
flowering plants make use of modified
roots as a means of penetrating the
tissues of the host plant in or avange
the primary root of the seedling there's
no root cap and is the only root formed
by the parasite serving only for fresh
attachments and modified roots
[Music]
cuz pewter has only a temporary root in
the seedling stage the stem of Gus
cooter twins around the stem of the host
and obtains its nourishment by means of
numerous penetrating suckers which
spring from the surface of its stem
nearest to the host such sucking roads
are known as historia in some aquatic
plants the floating branches develop a
kind of advantageous roots which are
soft light spongy and colorless and
unknown as respiratory roots they
usually develop above the level of water
and serve to store up air such roots
facilitate respiration this is also seen
in the case of the plant josiah
epiphytic roots are aerial and hang
freely in the air each hanging root is
surrounded by a spongy tissue known as
Elliman which absorbs moisture from the
atmosphere such roots do not absorb any
food from the supporting plant for
example in case of Vanda a common orchid
in some plants the aerial advantageous
roots form chlorophyll in then and
become a similar tree in function and
our hands known as a similar tree roots
they synthesize food by photosynthesis a
common example is tinospora
[Music]
let us now study the important functions
of the root fixation is a mechanical
function where the main root goes deep
into the soil and the lateral roots
spread out in different directions and
the root system as a whole firmly
anchors the plant in one of cots this is
done by the fibrous roots the absorption
of water and minerals from the soil is
done with the help of root hairs which
develop in a cluster at a little
distance behind the root apex these root
hairs adhere to the soil particles and
absorb water and soluble mineral salts
from them the root is also concerned
with a conduction of water and mineral
salts thereby sending them upwards into
the stem and the leaves there is a
certain amount of food stored up in the
root usually in its mature region as a
root grows further the stored food is
utilized on the branches of Tenace pura
long slender hanging roots develop which
form chlorophyll in them and turn green
in color these roots are a similar tree
in functions hygroscopic roots are found
in epiphytic orchids for example in
Vanda the absorb moisture directly from
the atmosphere in most of the genera of
Pappa Linus year for Basya for example
soya bean the symbiotic root nodules are
present they contain the nitrogen fixing
bacteria and help in fixing atmospheric
nitrogen in the soil to increase its
fertility the assimilatory roots are
green and prepare food via
photosynthesis such roots are commonly
found into hospira some roots help in
vegetative propagation for example in
case of sweet potato the pneumatophores
of mangrove vegetation r- leader tropic
and possessed lenticels on them for
exchange of gases roots of several
plants develop mutually beneficial
partnership with some fungal hyphae to
form mycorrhizae
thus the root performing innumerable
functions is the lifeblood of all
vegetation around the world and
ultimately a reason for our survival
you
you
brutes modifications and functions many
roots of peculiar form and functions are
known among angiosperms let us look at
the various modifications of roots we
will start with the taproot
modifications for storage of food the
fusiform root is the primary root that
is swollen in the middle and gradually
tapering towards the apex and the base
for example radish nappa form root is
the primary root that becomes
considerably swollen at the upper part
hypocotyl
it becomes almost spherical and sharply
tapering towards the lower end
for example beet in case of the conical
root the root is brought at the base and
it gradually tapers towards the apex
like a cone for example carrot in case
of the tuberous or tubercular root the
root becomes thick and fleshy but does
not maintain any specific shape for
example sweet potato then we have the
branch root modification pneumatophores
many plums growing in marshy places
especially in the tidal swamp forests
produce special roots which grew up into
the air from beneath the slime and
unknown as pneumatophores or breathing
roots
new metaphors arise from long horizontal
roots and as there- leader tropic they
grow vertically upwards projecting
several inches into the air they often
occur in large numbers around the trunk
of the tree there is a Khakee layer over
each root which covers even the apex and
the portion in the air there's numerous
lenticels pneumatophores form short
absorbing branches from their lower
portions and their root hairs are born
on these they are the Centers of active
respiration and their vertical growth
may be necessary to place the absorbing
roots at the most favorable level
examples are seen in rhizophora sana
rashia Hera tiara and avicennia let us
look at the modifications of
advantageous roots for storage of food
tuberous or to bycula roots are swollen
roots without any definite shape for
example in case of sweet potato fatha
culated roots refer to several
tubercular roots that occur in a cluster
at the base of the stem for example in
case of asparagus
[Music]
the modification in which the slender
route becomes suddenly swollen near the
apex is known as nodules fruit for
example in case of ginger the
modification in which there are some
swellings at frequent intervals the
roots are termed maurella form or beaded
roots for example in case of mom or dica
when the root possesses a series of ring
like swellings on its body it is known
as an annual ated root for example in
case of eye pockit cornea then we have
modifications of advantageous roots for
mechanical support crop roots are those
which develop from the main branches of
a tree and grow straight downwards to
enter the soil and form underground
branch roots for example in case of
ficus bengal ences the banyan tree as
the roots grow old the increase in
thickness due to secondary growth and
give support to the branches which
continue their horizontal growth
producing more prop roots at intervals
[Music]
adventitious roots sometimes form
supporting stills and are thus known as
stilt roots for example in case of fan
Dennis the maize plant has a tall
slender stem it develops a cluster of
roots from the first one or two nodes
above ground level which grow obliquely
downwards into the soil and give added
support to the stem
some tropical climbers like Piper battle
produce roots from their nodes and
Internode's
by means of which such plants attach
themselves to their support and climb
bit these roots cling closely to the
bark of the supporting tree to ensure a
foothold such roots secrete a kind of
sticky juice which quickly dries up in
the air as seen in Hedera helix in
Hadera adventitious roots are formed in
great numbers on the side of the stem
next to the support they attach
themselves to the support by the
formation of Mew cyllage from the
surface cells of the apex often the
roots form at their apex a disc like
structure or a sort of claw for a firm
foothold and hence are also called
clinging roots let us look at the
modifications of adventitious roots for
vital functions parasites among the
flowering plants make use of modified
roots as a means of penetrating the
tissues of the host plant in or avange
the primary root of the seedling there's
no root cap and is the only root formed
by the parasite serving only for fresh
attachments and modified roots
[Music]
cuz pewter has only a temporary root in
the seedling stage the stem of Gus
cooter twins around the stem of the host
and obtains its nourishment by means of
numerous penetrating suckers which
spring from the surface of its stem
nearest to the host such sucking roads
are known as historia in some aquatic
plants the floating branches develop a
kind of advantageous roots which are
soft light spongy and colorless and
unknown as respiratory roots they
usually develop above the level of water
and serve to store up air such roots
facilitate respiration this is also seen
in the case of the plant josiah
epiphytic roots are aerial and hang
freely in the air each hanging root is
surrounded by a spongy tissue known as
Elliman which absorbs moisture from the
atmosphere such roots do not absorb any
food from the supporting plant for
example in case of Vanda a common orchid
in some plants the aerial advantageous
roots form chlorophyll in then and
become a similar tree in function and
our hands known as a similar tree roots
they synthesize food by photosynthesis a
common example is tinospora
[Music]
let us now study the important functions
of the root fixation is a mechanical
function where the main root goes deep
into the soil and the lateral roots
spread out in different directions and
the root system as a whole firmly
anchors the plant in one of cots this is
done by the fibrous roots the absorption
of water and minerals from the soil is
done with the help of root hairs which
develop in a cluster at a little
distance behind the root apex these root
hairs adhere to the soil particles and
absorb water and soluble mineral salts
from them the root is also concerned
with a conduction of water and mineral
salts thereby sending them upwards into
the stem and the leaves there is a
certain amount of food stored up in the
root usually in its mature region as a
root grows further the stored food is
utilized on the branches of Tenace pura
long slender hanging roots develop which
form chlorophyll in them and turn green
in color these roots are a similar tree
in functions hygroscopic roots are found
in epiphytic orchids for example in
Vanda the absorb moisture directly from
the atmosphere in most of the genera of
Pappa Linus year for Basya for example
soya bean the symbiotic root nodules are
present they contain the nitrogen fixing
bacteria and help in fixing atmospheric
nitrogen in the soil to increase its
fertility the assimilatory roots are
green and prepare food via
photosynthesis such roots are commonly
found into hospira some roots help in
vegetative propagation for example in
case of sweet potato the pneumatophores
of mangrove vegetation r- leader tropic
and possessed lenticels on them for
exchange of gases roots of several
plants develop mutually beneficial
partnership with some fungal hyphae to
form mycorrhizae
thus the root performing innumerable
functions is the lifeblood of all
vegetation around the world and
ultimately a reason for our survival
you
you
About this Video
Apr 19, 2026 Last updated
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