INCLUDING MODIFICATIONS

1. Root & stEMmoRPHOLOGY (including MODIFICATIONS) Made by- V.V.S.S.PREETI Sr. MEDICON -1 Roll no- 33

2. WHAT IS MORPHOLOGY? Morphology is the study of – External features of plants, Arrangement, Relationship Of organs. The underground part of flowering plant is the root system while the portion above the ground forms the shoot system. Plant has vegetative and reproductive organs

3. Vegetative Organs Roots Stems Leaves

4. THE ROOT LOCATION- grows underground TYPES OF ROOTS- 1) Primary- formed directly from axis of embryo plant. 2) Lateral- arises from primary.

5. TYPES OF ROOT SYSTEMSG

6. Function of roots Anchor the plant Absorb water and minerals from soil Storage

7. Fig. 38.21

9. NODULATED -eg: ginger

10. MONILIFORM-eg: grasses

12. STILT ROOTS IN SCREWPINE short roots grow obliquely downward from near base of stem

13. CLIMBING ROOTS IN climbers like PEPPER & BETEL NUT, adventitious roots are formed at nodes which help in climbing.

14. EPIPHYTIC ROOTS IN VANDA, Base of tissue grows spongy tissue termed velamen that absorbs moisture from the air

15. CONTRAC TILE ROOTS IN COLACASIA, They posses roots that contract so underground roots are kept at proper levels.

16. FLOATING ROOTS IN JUSSIAEA roots are white, spongy filled with air. Help plants to float

17. BREATHING ROOTS IN AVICENNIA, Roots grow into vertical branches that have openings called Pneumetaphores for root aeration.

18. REORODUCTIVE ROOTS Exposed roots of MURRAYA Have adventitious buds which grow into new plants.

19. PARASITIC ROOTS IN CUSCUTA Haustoria Penetrate into host stem & enter vascular bundles which absorb materials.

20. ASSIMILATORY ROOTS IN TRAPA, Adventious roots with chlorophyllous tissue capable of photosynthesis.

21. FOLIAR ROOTS IN BRYOPHYLLUM Roots arise from lamina, petiole,veins

22. TUBERCULAR ROOTS IN SWEET POTATO Lateral roots are swollen & Without definite shape.

23. THE STEM The stem grows erect & lifts the leaves , exposing them to sunlight.it also conducts materials from roots to leaves. Based on nature of stem,plants are divided into herbs,shrubs & trees

24. Function of Stems support leaves to maximize light absorption part of conduit for transport of water, minerals, and organic solutes storage

31. THE END THANK YOU!