Last Minute Lecture

Plant Hormones and Growth Regulators: Coordination of Development and Stress Responses | Chapter 20 of Plant Physiology and Development Chapter 20 of Plant Physiology and Development provides a comprehensive overview of plant hormones and growth regulators—small signaling molecules that orchestrate nearly every aspect of plant life. These chemical messengers integrate environmental cues with developmental programs, influencing processes such as cell division, elongation, senescence, dormancy, germination, and stress responses. The chapter explains how classical hormones like auxins, cytokinins, gibberellins, abscisic acid (ABA), and ethylene interact with newer regulators including brassinosteroids, jasmonates, salicylic acid, strigolactones, and peptide hormones. The video below offers a clear, structured summary of these pathways and their functional significance. Watch the full chapter explanation here: The Five Classical Plant Hormones The chapter begins by outlining the...

Signal Transduction Pathways, Plant Receptors, and Cellular Communication Explained | Chapter 15 of Plant Physiology and Development Chapter 15 of Plant Physiology and Development examines the complex signaling systems plants use to detect internal and external cues and translate them into precise physiological responses. Signal transduction forms the foundation of plant communication, allowing cells to perceive environmental changes, hormones, pathogens, mechanical forces, and developmental cues. This chapter provides a detailed breakdown of receptors, second messengers, protein kinases, transcriptional regulators, and the sophisticated feedback loops that ensure specificity and adaptability in plant signaling. Watch the complete Last Minute Lecture lesson below for a clear and accessible summary of these mechanisms. Watch the full chapter explanation here: How Plants Detect and Process Signals Signal transduction begins when a stimulus activates a receptor. Receptors may b...