View
249
Download
0
Category
Preview:
Citation preview
8/9/2019 Plant Bio-Diversity Evs
1/29
Plant Bio-diversity
8/9/2019 Plant Bio-Diversity Evs
2/29
Contents
}}MeaningMeaning}}IntroductionIntroduction}}ClassificationClassification
}}Their Importance inTheir Importance inhuman lifehuman life
8/9/2019 Plant Bio-Diversity Evs
3/29
MeaningThe variety we see in
the plants that existon the Earth is known
as Plant Bio-Diversity.
8/9/2019 Plant Bio-Diversity Evs
4/29
Plant worldPlant world
Plants are living organisms belonging tothe vegetal kingdom that can live onland or in water.
There are over 300,000 species ofplants, of which more than 250,000produce flowers.
Unlike animals, that need to eatalready processed food , the plantsare able to produce their own foodthrough a chemical process calledphotosynthesis.
8/9/2019 Plant Bio-Diversity Evs
5/29
PLANTS
Bryophytes-No
vascular tissue
Tracheophytes-
vascular tissues
are present
SEEDLESS
Reproducevia spores
SEEDED
GYMNOSPERMS-Non flowering
ANGIOSPERMS-
Flowering
8/9/2019 Plant Bio-Diversity Evs
6/29
Classification on basis ofClassification on basis of
habitats:habitats:
MESOPHYTES - Mesophytes are the
plants that grow on land and need
moderate amount of water.XEROPHYTES - Xerophytes are the
plants which grow on land and require
very little water.HYDROPHYTES - Hydrophytes are the
plants which float on or grow under
water.
8/9/2019 Plant Bio-Diversity Evs
7/29
Some Mesophytes:
Ox - eye daisyClover
8/9/2019 Plant Bio-Diversity Evs
8/29
Some Xerophytes:
Euphorbia VirosaBarrel Cactus
8/9/2019 Plant Bio-Diversity Evs
9/29
Some Hydrophytes:
Lotus Water Lily
8/9/2019 Plant Bio-Diversity Evs
10/29
Classification on the basis oflife cycle:
}Annual plants-They live only for
1 season}Biennial plants-They live for 2
seasons
}Perennial plants-They live for 2or more seasons
8/9/2019 Plant Bio-Diversity Evs
11/29
Annual Plants:
8/9/2019 Plant Bio-Diversity Evs
12/29
Biennial plants
8/9/2019 Plant Bio-Diversity Evs
13/29
Perennial Plants:
8/9/2019 Plant Bio-Diversity Evs
14/29
Classification on basis ofmode of nutrition:
}Saprotophs-are Autotrophs areorganisms that are capable ofmaking their own food.
}organisms which obtain nutrientsfrom dead organic matter (thisterm commonly applies to fungi).
}Paraphytes are plants whichfeed on insects
8/9/2019 Plant Bio-Diversity Evs
15/29Leaves.......Leaves.......
8/9/2019 Plant Bio-Diversity Evs
16/29
Why do leaves have different
shapes ?
Plants grow and maintain themselves
through photosynthesis, the process inwhich leaves collect sunlight to convertwater and carbon dioxide into sugar.Since not all plants are exposed tosunlight in the same way leaves havedifferent shapes that accommodateeach plants individual needs some plants, for e.g. , push their stems upwards ,rising above other plants and competingfor sunlight.
8/9/2019 Plant Bio-Diversity Evs
17/29
Thus the Structure of leaves ofplants is always different.
1. Examples of how
leaves may differ Inshape : Holly hastough spiky leaves.Oak trees have softleaves with a wavy
edge. Atlas cedarshave bunches of thinsharp leaves.
8/9/2019 Plant Bio-Diversity Evs
18/29
Trees and the difference intheir barks1. A tree is a plant with a thick woody stem
called a trunk.
2. Most trees can grow for 100s of yearssome trees are small but many are tallerthan a house
3. As a tree grows its outer layer becomeshared when they die the form a tough layercalled bark
4. There are different types of barks .5. Look at the rings in a tree stump and count
these to find out the trees age..
8/9/2019 Plant Bio-Diversity Evs
19/29
Red pineCedar
Difference in barks of trees
8/9/2019 Plant Bio-Diversity Evs
20/29
Zelkova White birch
8/9/2019 Plant Bio-Diversity Evs
21/29
8/9/2019 Plant Bio-Diversity Evs
22/29
Carnivorous plants
The Venus flytrap plant The Pitcher Plant
8/9/2019 Plant Bio-Diversity Evs
23/29
Male and female trees Dioecious plants are plants of whichDioecious plants are plants of which
there are both male and female sexes.there are both male and female sexes.
Some dioecious plants include holly,Some dioecious plants include holly,ginkgo, asparagus, dates, mulberry andginkgo, asparagus, dates, mulberry andspinach.spinach. With some trees, such as dateWith some trees, such as datetrees male flowers usually have smalltrees male flowers usually have smallstigmas or maybe no stigmas in themstigmas or maybe no stigmas in themand female trees will be missingand female trees will be missing
stamens.stamens.
8/9/2019 Plant Bio-Diversity Evs
24/29
Examples for male and femaletrees:
Mae holly tree Female holly tree
8/9/2019 Plant Bio-Diversity Evs
25/29
Test tube plants Growing a plant in a test tube is an artificial
mean of propagation, but the technique
depends on a natural process the capacityto regenerate, or replace, in loss or damagebody pats with new growth first, a smallpiece of plant tissue is isolated in a sterilizedenvironment such ass a test tube the tissue isthen nourished with a suitable growthmedium given the proper condition , anentire plant can be regenerated from a tinybit of tissue, or even from a single cell
8/9/2019 Plant Bio-Diversity Evs
26/29
TEST TUBE PLANTS:
8/9/2019 Plant Bio-Diversity Evs
27/29
Medicinal plants:
Serpentina Gulvel
Asparagus
8/9/2019 Plant Bio-Diversity Evs
28/29
Necessity of plants in human life
Plants maintain the balance in nature
They enable the survival of all species through theinterdependence among living things.
They provide us food
Medicines and herbs can be made out of them
They remove carbon dioxide, release oxygenand purify the air
Raw materials timber, paper, silk can beobtained through them
8/9/2019 Plant Bio-Diversity Evs
29/29
Recommended