Pteridophyta: Characteristics, Example, Structure Video Lecture - NEET

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on browse item let us start the topic on
tell you do fighter so let us see what
new do we study about Tarot fighter so
first we started with hello fighter
where there was no body differentiation
at all the next group was bryophyte away
there was some body differentiation
which existed there but again there was
no specialized vascular tissues so now
let us see in torino fight on what
improvements do we see here so here
again body differentiation exists so now
we have true root stem and leaves like
improvised also there was some body
differentiation but then again it was
not too much distinct but now we have
distinct root stem and leaves
now these stereo fights where the first
terrestrial plants to have vascular
tissues so that is the improvement of
pteridophytes over the bryophytes in
graphics there are no specialized
vascular tissues but in pteridophytes we
have the specialized vascular tissues
what are the vascular tissues xylem and
phloem which help in conduction of water
and minerals throughout the plant body
so specialized vascular tissues are
present so vascular tissues when I say I
am referring to xylem and phloem we have
spoken about xylem and phloem in detail
in classifying them hidden reproductive
system again here also so they are also
crypto gamma so here also you do not see
the reproductive structure externally
they reproduce by spores okay almost
12,000 species of Tara two fights exist
so these two files are often termed as
seedless vascular plants because in
these plants we have the vascular
tissues but there are no seeds again
because the reproductive system is again
hidden so we do not have the concept of
flowers or seeds
so these are seedless vascular plants so
you see gradually with each group we are
having some improvements right talking
about the habitat they prefer mostly
damp and shady regions however sometimes
they are also found in sandy soils so
let us look at some of the examples of
pteridophytes well before that talking
about nutrition they are also
autotrophic because due to the presence
of chlorophyll so let us look at some
examples of that it affects firms are
one of the best examples of
pteridophytes and I'm sure all you would
have seen phones that you generally have
ferns as decorative plants light you do
not have flowers or knees but the lip
lines Mysteria selaginella and Equus
edom these are some of the examples of
pteridophytes so now let us talk about
the structure of pteridophytes so how
exactly is the structure like I mean
what are the different parts in a tell
you to fight so their main plant body is
the sporophyte
as I said in bryophytes and caliphates
they are known vascular plants so their
dominant term feels in their lifecycle
was the gametophyte but in this case the
main plant body is the sporophyte so the
plant actually the plant which we see
the actually is the sporophyte that is
something which carries the sports so
that is the main client body so
sporophyte is going to be the dominant
phase in the life cycle of a tarry to
fight talking about the plant body it
has true root stem and leaves so here
you can see these leaves you can see the
stem and you can also see the roots
sporophytes beers for Antioch subtended
by leaf like appendages called
sporophylls so here you can see this is
the plant this is a terrible fight so
this is nothing but the sporophyte and I
said to the dominant wheelers
sporophytes the main plant body is the
sporophyte
now this profile will be your sporangia
subtended by live like appendages called
sporophyte so here you can see some leaf
like structures so these leaf like
structures will surround together the
sporangia and sporangia will contain the
spores so the live like structures are
known as sporophylls so what we can say
that inside the sporangium we have the
spores and these spores germinate to
form a new plant again that is why we
told that pteridophytes mostly reproduce
by spores or mayshen so somewhat like
this so we can say that so basically to
understand the structure clearly it is
like you have a sporophyte so sporophyte
is nothing but the plant which you
actually see that is your sporophyte the
sporophyte will have some leaf like
structures and they are known as
sporophylls so sporophylls either live
like structures now these poor Ophuls
will actually enclose inside them a
structure known as sporangia
now this poor antia actually contains
the spores so the so now you understand
where the spores are present so now when
I say that sporophyte is the main plant
body that means the plant which we see
the pteridophytes or the phones which we
see they are all sporophytes somewhere
inside their body inside the sporangia
they have spores clear so the structure
is clear where we have the spores and
the leaves are known as sporophylls
okay so now we talk about another
structure which are present here
strawberry strawberry are present in
some pteridophytes
now the question is what is strawberry
strawberry add cone like distinct
compact structure formed by the
sporophylls now these left leaves the
sporophylls which I was talking about
just now the sporophylls will join
together all the sporophylls will form a
compact
leaps structure and that structure is
known as strawberry or cones sometimes
it is also known as cones so these
strawberry is present in some
pteridophytes strawberry are not present
in all the river whites in some places
the leaves are like individual leaves in
the form of sporophylls but sometimes
the sporophylls join together to form a
compact structure called strawberry so
examples of plants where we actually
find strawberry is aqueous eat'em
selaginella so these are some plants
where strawberry is actually present
right now when I talk about the leaves
here everywhere I am talking about his
rights when I talk about the leaves of
thus the terrified the leaves can be
small the leaves can be large so the
size of the leaves actually depends now
if you look at fawns they have got large
leaves right because that leaves give
the beauty of the force and that is why
we often keep it for decoration whereas
if you look at some plants like
selaginella they have got extremely
small leaves so the size of the leaves
again values in pteridophytes some have
larger leaves while others have smaller
leaves so now the structure is clear in
the entire two fights the main plant
which you see is a sporophyte sporophyte
has leaves like structures which are
called sporophylls now this poor Ophuls
can be present just like that or it can
be like a compact structure but
strawberry which is present in
decreasing term and thank you please
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