stomata & their type
TRANSCRIPT
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Stomata& Their type
By Pankaj Kukreti
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Stomata :- Stomata Denoted To Small Pore Present On Leaf , Which Are For Mean Of Gasseous Exchange & TranspirationThey Constituent Three Part-Cell Pore- Guard Cell- Subsidiary Cell
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Cell Pore :-- Pore Present On Leaf - Help In Gasseous Exchange - Transpiration Occur By This
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Guard Cell - Specialized Cell surrounds Stromatal Pore-Always Present In Pair- Helping Stomata In Opening & Closing
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Subsidiary Cell
These Are Type Of Epidermal Cell Which Are Associated With Guard Cell They Are Morphologically Different From Guard Cell also Called Accessory Cell
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Stomatal ApparatusStomatal Pore , Guard Cell & Subsidiary Cell Together Called Stomatal Apparatus
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Open & Closed Stomata
>> Open Stomata Happen At Day Time Closed Stomata Happen At Night Timing>>At Open Time Transpiration Occur At Closed Timing No Transpiration Occur
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Types Of Guard CellIn Dicot Leaf= Kidney Shape
In Monocot Leaf= Dum bell Shape
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Arrangement Of StomataIn Monocot = Parellel
In Dicot = Irregular
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Presence Of Stomata In Leaf Polygonum Type Mesophytic Type Monocot Type
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Stomata Based On Ontegeny Development
Haplocheilic Type :- Guard Cell Originate By Stomatal initial & Neighbouring Cell Get Concerted Into Guard Cell
Syndetocheili Type :- Here , Guard & Subsdiary Cell Originate From Same mother Cell
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Metacalfe & Chalk :- Describe 4 Type Of Dicot Stomata
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Anomocytic Type :-Here , Stomata Surround With Limited Number Of Cell , Which Cannot be Differentiated From Other Cell
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Anisocytic Type :-Here, Stoma Surrounds by 3 Subsdiary Cell , In Which One cell is Smaller Than Other Two
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Diacytic Type :-
Here, Stomal Encloses In Pair Of Subsidiary Cell In Which They Are in At Right angle To Guard Cell
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Paracytic Type :-Here Subsidairy Cell Arranged In That Manner They Having Same Arrangement As Guard Cell