a presentation on different plants form and functions of avijit chowdhury&nilesh majumdar

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By NILESH MAJUMDAR A Presentation On Different Plants Form And Functions

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By

NILESH MAJUMDAR

A Presentation On Different Plants Form And Functions

PICTURE OF A SHURBA Shrub is plant

which has branching stem near the base. In shrub the stem are hard but not very thick.

PICTURE OF A HERBPlants with green

and tender stems are called herbs . They are usually short and may not have many branches.

PICTURE OF A TREESome plants are very

tall and have hard and thick brown stem. The stem have branches in the upper part, much above the ground. Such plants are called trees.

PICTURE SHOWING DIFFERENT PARTS OF APLANT

Generally a plant is mainly divided into two parts –

Root system.Shoot system. The part of the plant

above the ground is called shoot.

The part of the plant below the ground is called root system.

ROOT SYSTEMThe part of the plant

under the ground is called root.

Roots hold the soil thus gives strength to the plant

Roots absorb water and minerals from the soil.

Some time roots also store food for future use.

Roots are of three types – Tap root Fibrous root Prop root.

PICTURE OF PROP ROOTProp root are the

roots that grow from the branches. As this roots reach the ground , they fix themselves in the soil and give support to the spreading branches of the tree.

PIOCTURE OF TAP ROOTThe main root from

which branch root arise . Such roots are called tap root

PICTURE OF FIBROUS ROOTA number of thin fibre

like roots arise from the base of the stem. They spread out in the soil and give support to the plant. This are known as fibrous root.

PICTURE OF A SHOOT SYSTEM

The upper part of the plant above the ground is called shoot system.

Generally a shoot system contains -

Stem. Leaf Nodes Internodes Buds Flower Fruits

PICTURE SHOWING TRUNK AND BARK OF A TREE

The stem of tree is called trunks. They are thick, woody and strong.

The outer, protective covering of trunk of a tree is called bark

PICTURE SHOWING TENDRIL

Thin thread like structre on the stem which are modification of the stem and are known as tendrils.

PICTURE SHOWING SPINESSpines are modified

form of leaf. With the help of spines a plant can restrict loss of water by evaporation. It also acts as a protective organ.

PICTURE SHOWING A LEAFLeaf is a part of shoot system

which makes food for the plant by photosynthesis. Generally a leaf is green in colour due to the presence of Cholorophyll. Sometimes leaf may be of different colour

A leaf has – LaminaPetiole Midribs Veins

PICTURE SHOWING A FLOWER

A flower is that part of a plant which take part in reproduction.

A typical flower contain – Pedicei Thalamus Sepals Petals Stamen Filament Anther Pollen grain Pistil Ovary Stigma Style

PICTURE SHOWING FRUIT.A fruit is a

reproductive product of a plant.

A fruit contains seed.A seed contains baby

plant called embryo.The embryo contain

plumule and radical.The plumule grows

into shoot and the radical grows into root.

THE END THANK YOU