Monocot Leaf
Monocot leaves are the leaves which appear on plants produced from seeds with single cotyledon likeMaize , Rice , Orchids , Grass , Wheat , Palm trees , Bananas , magnolia treeetc . The leaves are usually ribbon like with parallel venation . Parallel venous blood system mean veins in the leaf are arranged in a parallel preference . Botanically , monocot leaf are tell to haveisobilateralleaves because both surface of the leaves have same colouration / appearance . by and large , the monocot foliage is slender and long in shape .
Anatomical Structure Of Monocot Leaf
The following arrangement of tissues is seen in a cross - subdivision of a monocot leaf .
Upper Epidermis
Upper epidermis is a individual superimposed tissue that is made up of gun barrel mold jail cell that are arranged closely with no intercellular spaces between them . On any liliopsid leafage , there is equal figure of stomate present on both the open of epidermis , a condition normally described asamphistomatic . Upper epidermis on its out airfoil is cover by a thin cuticle .
On the upper cuticle there is also bearing of few large bubble - like cells referred to as motor cellular phone or bulliform cells which are thought to help the folio bend or fold and thus trim back aerofoil area expose to sunshine accordingly reducing the rate of transpiration .
Mesophyll
Mesophyll is a land green tissue paper present in between upper epidermis and lower epidermis . In monocot leaf , the mesophyll is not secern into palisade parenchyma and spongelike parenchyma . The mesophyll tissue consists of only one kind of cadre which are modest oval or spherical or irregular mold spongy parenchyma cellphone with chloroplasts and chlorophyll .
Vascular Bundles
Vascular tissue is an arrangement of multiple cell type in vascular plants which countenance for the rapture of water , minerals and production of photosynthesis to be transmit throughout the plant life . The vascular megabucks also provide strength to the leaf . Each vascular bundle consists of xylem and phloem complex tissues surrounded by bundle case . Vascular sheaf in monocot leaf can be describedconjoint , collateral and closedwith endarch xylem .
The vascular bundle is describe as unsympathetic because there is no cambium present between xylem and phloem . It is also described as conjoint and collateral because phloem and xylem are present on the same wheel spoke whereas xylem bundles are described asendarchbecause the Protoxylem vas face towards the upper epidermis .
Lower Epidermis
Lower Epidermis is found just below the uniform mesophyll as a exclusive stratum of cells and contains pore and guard cadre . The cells are cubical or cask in shape and arranged very closely without any intercellular spaces . On the , lower epidermis of a monocot foliage , the same telephone number of stomata are present just like in the upper cuticle . In between the epidermal layer of a monocot leafage there is undifferentiated spongy parenchyma with presence of less number of chloroplast and chlorophyll and thus both surface of the leaf look to be of same coloration .
Monocot Leaf Diagram
Characteristics Of monocot Leaf
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Dicot Leaf
Dicot leaves are the farewell which come out on plants produced from come with two embryonic leaves or cotyledon likeroses , peas , beans , lentils , peanut , oak Sir Herbert Beerbohm Tree , daisies , cacti etc . The leaves normally have an interconnection of veins that leave to reticulate venation . Reticulate venous blood system means vein in the folio are arranged or interconnect to form a web - similar web . Botanically , dicot leaf are said to haveDorsiventralleaves because both surface of the leaves differ in coloration / appearance and structure . Generally , magnoliopsid leaf is broader in form and relatively modest in sizing .
Anatomical Structure Of Dicot Leaf
The following arrangement of tissues is seen in a cross - plane section of a dicot leafage .
Upper Epidermis is the outmost layer containing few or no chloroplast . The cell are quite transparent and let most of the visible radiation that strikes them to return through the underlying cells . The upper surface is covered with a waxy waterproof cuticle which serves to reduce water personnel casualty from the leaf . The carapace on the upper epidermis is thicker than that of low-toned epidermis . The minute openings establish on the epidermis are concern to as Stomata . On any dicot leafage , the stomata are more in issue on the lower cuticle than on the upper cuticle .
Lower Epidermis bear on to a single level of cells on the modest surface of the leaf that contains stomata and guard cell . It contains more stoma ( thousands per square cm ) than upper cuticle . Stomata provide the substitution of carbon dioxide , atomic number 8 and transpiration .
Mesophyll Tissue
In the leafage of dicotyledonous plant , the mesophyll layer is differentiated into two character of cells , namely , the palisade parenchyma cells located just below the cuticle and the squishy parenchyma cell that are located below the palisade cell and above the abject cuticle . The occasion of palisade parenchyma is photosynthesis . Spongy cells are irregularly form and slackly arranged with numerous airspaces which ease substitution of petrol .
Vascular Tissue
The vascular bundles in dicot leaf are large and generally present in the veins of the folio . The vascular tissues of dicot leafage areconjoint , collateral and close . Xylem is present towards the upper cuticle while the bast towards the lower epidermis .
Vascular bundle are circumvent by a succinct layer of parenchymatous cells mention to as bundle sheath or border parenchyma . Xylem consists of metaxylems and Protoxylem watercraft . Protoxylem vessels are present towards the upper epidermis . Protoxylem vessels are newly formed young vessels while metaxylem vessels are old and well matured watercraft .
Phloem consists of sieve tubes , companion cells and phloem parenchyma . Phloem fibres are absentminded . The xylem consists of vessel and xylem fibres are absent . Generally , vascular megabucks facilitate in transportation of water , dissolved mineral and break up food textile in the leaf ; and leave enduringness to the leaf .
Dicot Leaf Diagram
Characteristics Of Dicot Leaf
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Difference Between Monocot And Dicot Leaf In Tabular Form
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