Hello students i am samba murthy today in this class i would like to explain about monocot root the last class already have explained the icon root and its internal tissues now today you see this mono controlled .
arrangement except very few differences this one about root in transfer section it shows three regions three important joules as in nicot root here also same they are epidermis cortex and steel you see this uh monocot root see this monocot road this is .
One of the tears of monocot root hmm it shows three region they are one is epidermis this is epidermis it is with pink color layer epidermis below the epidermis this region is called cortex and below the cortex this region the central region that is .
Called steel so it shows three important region epidermis cortex and steel central region is steel middle region is cortex outermost reason is epidermis okay epidermis cortex and the steel as in like roots foreign .
Foreign the outermost layer that's called epidermis epiderm epidermis is the outermost layer it is made up of the rectangular type of cells which are compactly arranged on the outer region .
The cuticle and stomata are absent cuticle and stomata are absent on the epidermis the main function of epidermis is it protects the inner tissues protects the inner tissues and some of the epidermal cells they are highly elongated these elongated epidermal cells these are known as .
Root heads these are the elongated epidermal cells these are called root heads root heights it is the cortex lies in between .
Epidermis and steel the region between epidermis and steel is called cortex cortex generally in case of roots foreign this is one of the important characters of roots so cortex is bigger than .
Steel this is an important character of roots so this cortex it shows three sub regions they are the outermost region of the cortex this is called exodus this layer this is called exodermist it is two to three layers made up of supervised cells .
Supervisory cell this is exodurmis it is present just beneath the epiderm just below the epidermis this layer is called exodomis this exodus is two to three layer and made up of supervised cells the cell walls are coated with subaru suppose if any case if epidermis is .
Removed if epidermis is lost this exodus it where it performs the function of epidermis this exodus it protects the inner tissues in the absence of epidermis if any case epidermis is lost exodus um .
The middle region of the cortex is called middle cortex it is made up of parenchymatous cells with a large intercellular spaces these cells are living cells these are living cells so it is present in so many layers this is called .
Middle cortex middle cortex and the innermost layer of the cortex this region this innermost layer of the cortex is it is shown in pink colored cells this layer is called endodermis endoderm it is singular this endodermis is the innermost layer of the cortex .
Innermost layer of the cortex that's called indonesia this one this shown in pink pink colored layer is called endodermized environment in case of roots endoderm is it is those the radial walls of the endodermal cell endodermal cells they are coated with .
Lignin and sobering endodermal cells they are coated with lignin and sobering those ligno soberine bands those are called casparian bands this is an important character of roots those lignos ovarian bands are called casparian bands .
Along with these casterian bands in this endoderm some passive cells are also present passage them this past instance these are thin walled cells which are present opposite to the protozoan vessels hair passage cells are going to say here password cells are present just .
Opposed to this protozoan vessels and they are helpful in conduction through these parcel cells water enters into the steel actually this cortex it helps in storage of water and also lateral conduction the function of contact is storage of water storage of food .
Materials and also the lateral connection root hex the absorbed water this absorbs water that enters into the steel through cortex so the connection is called lateral conduction this cortex it participates in the lateral conduction .
And also it stores water and food materials so these are the these are the layers of the cortex this outermost layer is called exodus middle region is called middle cortex and innermost layer is called endodermis these are the three regions of the cortex carticle and a .
Foreign foreign foreign foreign steel the central region is called steel generally in case of roots the steel is smaller than the cortex today the size of the steel .
Now to the most layer of the steel that is called hairy cycle of the outermost layer of the steel is called pericycle the steel is surrounded by pericycle you see this figure in this figure just beneath the endodermis this layer the layer just beneath the endodermis .
That's called pericycle pericycle the stereocycle is very important this very cycle it forms lateral roots it forms lateral roots lateral roots will arise from the pericycle sometimes it is very schematic also there is this very cycle it comes lateral this very cycle .
Is the outermost layer of the steel and a is these are vascular bundles these are vascular minerals inner to the steel vascular orbitals are present the important character of roots is these vascular minerals are radial .
Vascular mental means which consists of primary xylem and the primary chlorine that is vascular bundle in each vascular orbital xylem and chlorine are present the xylem present in vascular bundle is called primary xylem the claim is called .
Primary chlorine where in case of roots the vascular minerals are radial vascular bundles radial means the xylem and the phloem are arranged on different radiate they are located on different radii those are known as radial vascular bundles in case of .
One of what rows this radial vascular bundles are more in number they are more than six or more than eight in case of uh rightward roots they are either 2 3 4 or maximum 5. in case of monocot roads these are more in number so many radial vascular bundles are present here the xylem alternates with chlorine .
The dry funds xylem and then chlorine here you'll see this red colored one xylem after xylem this is chlorine xylem and phloem are presented side by side and they are alternate first xylem then fluorine then xylem then fly .
They are located on different radiation so that these are called radial vascular mandibles this uh gyrum xylem is polyarc and xor exothermic is the important character of .
Close ankle around them in case of roots the xylem is xor xylem is exact xor means say x or zero means island towards periphery and mitosis towards center that's called xor xylem is the character of rose protozoan means .
The xylem vessel with the narrow lumen that's called protozoan xylem vessel with big lumen that's called metabolism see this xylem with the big circle that's called metabolism the small circle that's called protozoan if the xylem vessel is having big lumen that is considered as .
Metabolism if it's having narrow humans it's called protozoa if protozoan towards periphery and metabolism towards center that xylem is called exarch asylum in opposite to that the prototylene towards center and metabolism towards periphery .
That's known as endorsement exorcism is found in rooms and endarth realm is found in strength endorsement is the character of stems x argument is the character of roots so this is the monocot root the xylem is xor a
nd the xylem is polyurethane earth means here .
Many gyromandals are there here the xylem molecules are more in number so this is polyart and xylem is okay and inside the steel the the tissue between the xylem and fluid the tissue is known as conjunctive tissue which tissue between xylem and phloem .
Present inside the steel the tissue present in the enzyme fluid is known as conjunctive tissue at the central region of the steel there is a big tissue parameters tissue this tissue is called middle law or paint or middle law in monocot roots big medulla .
Is present like what roots middle eyes almost absent or highly reduced or very small in size in case of monocot roots the medulla is big medulla is parenchymatous sometimes this middle lawn degenerates also okay it's part and camera presented in the central region .
Presence of middle law big middle law is the impact and character of monochromatic roots the reduced middle law is the character of the controls so this is the diagram of this like mono called root in the last last longer i'll discuss the quadro okay .
Now you see the differences between dry control and monocot root in most of the cases this one of our throat and lycontrol the reservoir same i accept very few differences one is the number of vascular bundles the number of vascular bundles in the dicot roots .
The vascular metals are more in number sorry less in number in monocot roots the vascular minerals are more in number in uh in both cases the vascular metals are radial algylum alternates with chloride in dicot roots they are very less .
Is like zone our troops they are born and in dicot roads middleware is absent or reduced parents in monocot roads the medulla is well developed it medulla is present at the central region these two are the basic differences between bicone roots and monograph roots .
And we will see some some more differences and uh some more diagonals and the diagram of monocot this is actual diagram this is textural diagram given in our textbook now you see the diagram which is drawn on the board that diagram .
Will be easy to draw in examinations so this is uh one of our truth so now you see though our diagram this is the diagram you're going to draw on the paper those three regions epidural epidermis cortex steel these are root heads metal cortex exodus this endoderm is pericycle xylem .
a the next class we can discuss