Original video: https://youtu.be/gpbn_pmsLf4
Delivered on: 8 MAY 2023
This comprehensive video explores the fascinating world of plant hormones, focusing on auxins and their diverse roles in regulating plant growth and development. 🌿 We'll delve into their discovery, biosynthesis, transport, and effects on various physiological processes.
What you'll learn:
Introduction to Plant Hormones: We'll define plant hormones (also known as phytohormones or plant growth regulators) and their key characteristics, including their ability to stimulate or inhibit physiological processes.
Auxin Discovery: Learn about Charles Darwin's pioneering experiments that led to the discovery of auxins and their role in phototropism (bending towards light).
Auxin Biosynthesis and Transport: We'll discuss where auxins are produced in plants and how they are transported, including the concept of polar transport (basipetal and acropetal movement).
Physiological Effects of Auxins: Explore the diverse effects of auxins on plant growth and development, including:
Cell Elongation: Understand the acid growth hypothesis and how auxins promote cell wall loosening and expansion.
Phototropism and Gravitropism: Learn how auxins mediate plant responses to light and gravity.
Apical Dominance: Discover how auxins control the growth of lateral buds.
Fruit Development: We'll examine the role of auxins in fruit set and development, including parthenocarpy (seedless fruit formation).
Herbicide Action: Understand how synthetic auxins can be used as herbicides to control weed growth.
Watch Part 2 here: https://youtu.be/iIKChlWac2M
Plant hormones differ from animal hormones in that:
1. Unlike animal hormones, plant hormones are not made in tissues specialized for hormone production. (e.g., sex hormones made in the gonads, human growth hormone - pituitary gland)
2. Unlike animal hormones, plant hormones do not have definite target areas (e.g., auxins can stimulate adventitious root development in a cut shoot, or shoot elongation or apical dominance, or differentiation of vascular tissue, etc.).
General Plant Growth Regulators (PGRs)
▪ Auxin: Indole compounds (indole-3-aceticacid, IAA)
▪ Cytokinin: Adenine derivatives (N6-furfurylamino purine, kinetin),
▪ ABA: Derivatives of carotenoids (abscisic acid);
▪ Gibberellins: Terpenes (gibberellic acid,GA3)
▪ Gases (Ethylene, C2H4).
Keywords: Plant hormones, auxins, plant growth, plant development, phototropism, gravitropism, apical dominance, fruit development, parthenocarpy, herbicides, acid growth hypothesis, polar transport, signal transduction, gene expression, agriculture, horticulture, plant physiology.
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
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