Original video: https://youtu.be/SrZIgGdIpHo Lecture on: 24 November 2025 Part 1: https://youtu.be/3mblOhwxerU Part 2: https://youtu.be/4LKaeyVyV2Q Notes can be downloaded here: This video segment of the Crop Physiology (AGR3301) lecture focuses on the crucial group of Growth Inhibitors—Abscisic Acid (ABA) and Ethylene—and their roles in stress signaling, development, and senescence. ABA is a general plant growth inhibitor and is considered the stress hormone due to its pivot

Original video: https://youtu.be/4LKaeyVyV2Q Lecture on: 17 November 2025 Part 1: https://youtu.be/3mblOhwxerU This lecture, part of the Crop Physiology (AGR3301) course, provides a comprehensive overview of Plant Growth Regulators (PGRs), also known as Phytohormones. These are natural chemical messengers that control a plant's growth, development, and movement at minute concentrations. PGR Classification Plant hormones are broadly classified into two groups based on their pr

Original video: https://youtu.be/3mblOhwxerU Lecture on: 10 November 2025 This lecture, part of the Crop Physiology (AGR3301) course, provides a comprehensive overview of Plant Growth Regulators (PGRs), also known as Phytohormones. These are natural chemical messengers that control a plant's growth, development, and movement at minute concentrations. Keywords: Phytohormones, Plant Growth Regulators, Auxin, Gibberellin, Cytokinin, Abscisic Acid, Ethylene, Plant Hormones, Apic