class 9th phloem tissues

this PowerPoint presentation (ppt) contains information about the phloem tissues and their elements in detail for class 9th students.

1. LIFE SCIENCE CLASS – 9 Topic - PHOLEM Bittu Kumar Integrated B.Sc. - B.Ed. School of Education, LPU

2. TOPIC - PHLOEM

3. LOCATION AND NATURE Phloos = Bark Conduction – bidirectional Growing parts Storage organs No mechanical function for plants

4. Phloem tissue is present in Wood Bark Both A and B None of the above

5. Elements of Phloem

6. Sieve Tube C onducting element of the phloem . Formed from a vertical series of elongated cells, interconnected by perforations in their walls in areas known as sieve plates . The perforations may be restricted to smaller areas, sieve fields, several of which are contained in each sieve plate.

7. Companion cell S pecialized parenchyma cells in the phloem tissues of the angiosperms . They are nucleated living cells with several ribosomes, plastids, and mitochondria. Their nuclei are relatively large (an indication of being metabolically active )

8. Phloem Parenchyma Phloem parenchyma cells, called transfer cells and border parenchyma cells .   located near the finest branches and terminations of sieve tubes in leaf veinlets . F unction in the transport of foods.

9. Phloem Fibres P rovide mechanical strength and support to a plant in general and to phloem in particular . These fibers are abundantly formed in the long but narrow stems of many fiber-crops.

10. Which of the following element is Non living? Sieve Tubes Companion Cells Phloem Parenchyma Phloem Fibers

11. RECAPITULATION Phloem Elements of phloem