Original video: https://youtu.be/h9DOZY_PFP0
Delivered on: 31 OCTOBER 2022
This video dives deep into the fascinating world of plant cell walls, exploring their structure, formation, and how they expand during growth. 🌿 We'll uncover the remarkable properties of these essential cellular components and their diverse functions in plant life.
What you'll learn:
Cell Walls Across Kingdoms: We'll compare cell walls in various organisms, from bacteria and algae to plants, highlighting their similarities and differences.
Cellulose: The Building Block: Discover the amazing properties of cellulose, the most abundant organic polymer on Earth, and its diverse uses in everyday life.
Plant Cell Wall Functions: Explore the multiple roles of plant cell walls
Cell Wall Composition and Structure: We'll examine the key components of plant cell walls, including cellulose microfibrils, hemicelluloses, pectins, and lignin.
Primary vs. Secondary Cell Walls: Understand the differences between primary and secondary cell walls, their formation, and their specialized functions.
Cell Wall Expansion: Learn how plant cells grow and expand, focusing on the mechanisms of anisotropic growth (directional expansion) and the role of auxin in regulating cell wall loosening.
Cell Wall Mechanics: We'll explore the mechanical properties of cell walls, including elasticity
Video Timestamps:
00:00 Introduction To Plant Cell Wall Structure Formation And Expansion
03:03 Cell Wall Exist Throughout The Tree Of Life
Brown algae, Green algae, Tunicates, Alveolates, Archaebacteria, Eubacteria.
04:55 Similarity Among Cell Walls Across Kingdoms
Common functions, Cell walls, Polysaccharides, Cell membrane, Cytoplasm.
08:33 When Would You Encounter Cellulose?
Paper, Cotton, Wood, Cellophane, Rayon, Insulation
14:55 Plant Cell Wall Functions 1
Functions, Leaf abscission, Control cell adhesion.
21:36 Plant Cell Wall Functions 2
Exoskeleton, Control shapes, Turgor pressure, Plant osmosis,
26:28 Plant Cell Wall Functions 3
Barriers, Chemical, Physical, Oligosaccharides.
31:33 Cell Wall Function Is Linked To Its Composition And Structure
Cell growth and shape, Connection, Protection, Strength
32:16 Cells in plant tissue
Parenchyma, Collenchyma, Sclerenchyma, Stomata
40:53 Primary Cell Wall
Microscope view of cell walls, type of microscope
47:10 Secondary Cell Wall
Components in the secondary cell wall, lignin, microscope colour staining.
49:25 Components of Cell Wall
Cellulose, Gel matrix, microfibril, glucan, cellobiose, Pectin, Alginate, Cross-links cell wall
01:14:29 Growth and Expansion of Cell Wall
Internal Pressure, why is anisotropic growth important? How is cellulose oriented within the cell wall?
01:31:25 Growth and Expansion of Cell Wall: Anisotropy
01:35:23 Growth and Expansion of Cell Wall: Auxin
01:40:25 Growth and Expansion of Cell Wall: Elasticity
Atomic force microscopy, Cell wall elasticity, Indentation modulus.
01:42:58 Growth and Expansion of Cell Wall: Summary
Anisotropic growth, Elastic asymmetry, Material anisotropy
01:43:41 Conclusion
Cell wall yielding under pressure is a property determined by its composition and structure
Complementary Slides- Genome Structure and GeneExpresion: https://1drv.ms/b/s!ApP1hfaZ_IRqje4DJmj-45uOEhDWZA?e=P2W1dI
Keywords: Plant physiology, cell wall, cellulose, plant cell, cell wall formation, cell wall expansion, anisotropic growth, auxin, elasticity, primary cell wall, secondary cell wall, lignin, pectin, hemicellulose
Location:
Faculty of Agriculture, Universiti Putra Malaysia
Fakulti Pertanian, Universiti Putra Malaysia, 43000 Seri Kembangan, Selangor
XPMM+9J Seri Kembangan, Selangor
2.9845517506267742, 101.73803356324866
Attribution 4.0 International — CC BY 4.0 - Creative Commons
Comments