PLANT LIFE

1. PLANT LIFE

2. PRESENTED BY Kanchan Sc.Mistress Govt. Sr. Sec. School Mand (Jal) Bimla Devi Sc. Mistress Govt. Sr. Sec. School Maqsudan

3. WELCOME TO THE WORLD OF FLOWERS

4. OBJECTIVES • To discuss the structure and parts of flower. • To discuss the functions of every part of flower. • To discuss the functions of flower as a whole. • To discuss the reproduction in flower.

5. THE FLOWER A flower represents the reproductive part of a plant body. It is the most important part meant for multiplication of the species.

6. PARTS OF A FLOWER • PEDICEL • SEPALS • PETALS • STAMENS • CARPEL

7. Pedicel Each flower has astalk called the pedicel But some flowers do lack the pedicel and such flowers are called sessile.

8. SEPALS • THE OUTERMOST WHORL OR SET IS COMPOSED OF GREEN,LEAF-LIKE PROTECTIVE STRUCTURES CALLED SEPALS. • PROVIDES PROTECTION TO REPRODUCTIVE PARTS. • PROVIDES PROTECTION TO THE FLOWER IN THE BUD CONDITION.

9. PETALS • Brightly coloured ,help in pollination • Provide protection to reproductive parts • Whorl inner to sepals

10. Stamens • It is the reproductive whorl. • It produces male gametes. • These are male part of the flower, consisting of anthers and filaments.

11. Anthers are swollen structures present on the tip of filaments .The anthers produce a powdery substance called the pollen grains.

12. Carpel • The central part of the flower is the female part consisting of a flask-shaped organ,called the carpel. • It is the innermost reproductive part • It produces female gamete.

13. OVARY • Each carpel consists of a basal swollen part called the ovary. • The ovary continues into a long style andends in a knob like part called the stigma. • The ovary contains many ovules Female sex cell is present inside the ovule.

14. Ovules and ovary finally develop into seeds and fruits respectively. • Seeds are present inside the fruit. • Seeds develop from the ovules while the ovary gives rise to the fruit. • Fruit wall serves to protect the developing seed.

15. FUNCTIONS OF A FLOWER A flower results in the multiplication of plants. Because a flower is the seat or organ of sexual reproduction and results in the formation of fruits and seeds. Seeds on germination give rise to new plants. How?

16. A flower is the source of food for many insects. For example , bees collect nectar from flowers and make honey 2. • Flowering plants are grown in gardens and in homes because of the bright colours and fragrance of the flowers. They, thus beautify the surroundings and provide aesthetic value.

17. Perfumes flowers yield perfumes or scents.The common ones are rose, jasmine, keora and lavender.

18. Spices cloves, so often used as a spice and in medicine, are the dried flower buds of the clove plants

19. POLLINATION • The transfer of pollen grains from the anthers to the stigma is called POLLINATION. • Pollination may be brought about by insects , wind or water.

20. FERTILISATION • After pollination, fertilisation between the male part and the female part takes place. • Thus after fertilisation seeds and fruits are formed. • Seeds develop from the ovules while the ovary gives rise to the fruit. • Fruit wall serves to protect the developing seed.

21. FACT FILE • Largest flower- Raffesia grows in Indonesia nearly I metre in diameter

22. FACT FILE • Smallest flower- Duckweed, Woiffia; only about o.5 millimeter in diameter.

23. ACKNOWLEDGMENT • WE ARE THANKFUL TO S. PRITPAL SINGH WALIA , PRINCIPAL , D.I.E.T. RAMPUR LALLIAN (JALANDHAR) ,MRS. JASWINDER KAUR AND SH.PARVEEN KUMAR (INSTRUCTOR) FOR COMPUTER TRAINING UNDER PROJECT SHIKSHA.