Downloaded 61 times
Uploaded bySerkan Kapan
Plant Structure
The document summarizes the structure and function of key plant tissues and organs involved in photosynthesis. It discusses the three main tissue systems - dermal, ground, and vascular - and key cell types like parenchyma, collenchyma, and sclerenchyma. It focuses on the role of xylem and phloem in transporting water, minerals and glucose throughout the plant. Key plant organs like leaves, stems, and roots are also summarized. Leaves contain chloroplasts and stomata for gas exchange to facilitate photosynthesis. Roots absorb water and minerals from the soil. The stem provides structure and uses xylem and phloem to transport throughout the plant.
More Related Content
Plant Structure
- 1.
- 2.
- 3. What we needto know! The structure and function of the leaves, stem and roots.
- 4. Discuss with the personnext to you.. Functions of each part of the plant Leaf Stem Roots
- 5. Tissue system and its functions Component tissues Locationof tissue systems Dermal Tissue System • protection • prevention of water loss Epidermis Periderm (in older stems and roots) Ground Tissue System • photosynthesis • food storage • regeneration • support • protection Parenchyma tissue Collenchyma tissue Sclerenchyma tissue Vascular Tissue System • transport of water and minerals • transport of food Xylem tissue Phloem tissue
- 6. The Stem 3 MainFunctions! • Provides support for the plant • Transports water from the roots to the leaves and rest of plant • Transports glucose from the leaves to the parts of the plant that need it. Ok… so how????
- 7. So… Xylem and Phloem makeup the transportation system of the plant. They are like the circulatory system of the plant
- 8. The xylem ofa plant is the system of tubes and transport cells that circulates water and dissolved minerals.
- 9. As a plant,you have roots to help you absorb water. If your leaves need water and they are 100 feet above the ground, it is time to put the xylem into action! A one way system - root to leaves XYLEM
- 10. Xylem is madeof vessels that are connected end to end for the maximum speed to move water around. They also have a secondary function of support. When someone cuts an old tree down, they reveal a set of rings. Those rings are the remains of old xylem tissue, one ring for every year the tree was alive
- 11. Enter phloem. The phloemcells are laid out end- to-end throughout the entire plant, transporting the sugars and other molecules created by the plant. Phloem is always alive. PHLOEM FUN!! What is the best way to think about phloem? Think about sap coming out of a tree. That dripping sap usually comes from the phloem.
- 12. Phloem 2 way process! Roots to shootsto leaves and back again
- 13. So how doesthe stem have a role in photosynthesis?? 2 Minutes to discuss with person next to you
- 14. The Roots • Holdplant in position • Absorb water and minerals from the soil • Have specialised cells to increase surface area for water intake Function
- 15. Carrots are onegiant root!!
- 16. Radish Plant Root hairs Fragileparts of cells that grow from the main root They massively increase the surface area for absorption
- 17. 1. Root Hairs: increase surfacearea for water & mineral absorption 2. Meristem: region where new cells are produced 1. Root Cap: protects tip of growing root The Structure of a Root Root Hairs Meristem Root Cap Xylem Phloem
- 18. Root Types 2. TapRoots –larger central root reaches deep water sources underground Ex. Trees, Carrots, & Dandelions 1. Fibrous Roots: Branching roots hold soil in place to prevent soil erosion Eg. Grasses
- 19. So what roleto roots play in photosynthesis?? 2 mins to discuss!
- 20.
- 21. 1. Main photosynthetic organ 2. Broad,flat surface increases surface area for light absorption Leaf Functions!
- 22. 3.Have systems to preventwater loss • Stomata open in day but close at night or when hot to conserve water • waxy cuticle on surface 4. System of gas exchange • Allow CO2 in and O2 out of leaf Leaf Functions!
- 23. Greener on top CO2gets in here Leaf Structure
- 24.
- 25. Leaf cell -palisade Position? Upper surface of leaf Features? Box shape Chloroplasts Function? Photosynthesis
- 26.
- 27. Gas exchange Leavesare designed to allow carbon dioxide to get to the main chlorophyll layer at the top of the leaf They have small holes called stomata on the under surface Each hole is open & closed by 2 guard cells
- 28.
- 29. Stoma is asmall hole Its size is controlled by 2 guard cells closed open
- 30. Stoma function isfor gas exchange in the leaf Carbon dioxide oxygen Guard cell Provided plant is photosynthesising
- 31. Stomata open and closeat different times of the day When it is light the plant needs CO2 for photosynthesis so the stoma open At night (darkness) they close
- 32. So we’ve saidthe stoma allows for gas exhange i.e. CO2 in and O2 out.. How does this happen??
- 33.
- 34. So thinking aboutphotosynthesis.. How does CO2 enter the leaf by diffusion and how does O2 leave by diffusion??
- 35. HOMEWORK Construct a posterof a NZ native plant. Label with plant parts and the functions of them relating to photosynthesis – make them pretty!!