Understanding Plants - Part I: What a Plant Knows

Go to Course: https://www.coursera.org/learn/plantknows

Introduction

### Course Review: Understanding Plants - Part I: What a Plant Knows If you've ever marveled at the intricate and vibrant world of plants and wished to delve deeper into their complexities, the Coursera course titled **"Understanding Plants - Part I: What a Plant Knows"** is tailored just for you. This course invites you on an enlightening journey through the senses of plants, drawing on groundbreaking research and innovative experiments that reveal how these seemingly passive organisms interact with their environment. #### Course Overview Rooted in both scientific inquiry and sheer curiosity, this course explores the inner lives of plants—how they see, smell, feel, and even remember. From the playful tones of fiction, like Seymour Krelborn's devotion in "Little Shop of Horrors," to scientific giants like Charles Darwin, the course respects this long fascination with plant biology while advancing our understanding through modern science. Each week unfolds another layer of plant perception, bringing exciting discoveries to the forefront: 1. **What a Plant Sees?** - This module introduces the concept of phototropism and how plants respond to light. You’ll engage with Darwin’s experiments and gain insights into modern research practices that detail the plant's sophisticated responses to their environment. 2. **What a Plant Smells?** - Here, you'll navigate the fascinating realm of chemical signals in plants. By examining how plants react to scents, including the intriguing idea of interplant communication, you’ll discover the complexities of their interactions in the ecosystem. 3. **What a Plant Feels?** - Delve into the tactile sensations plants experience. You’ll learn about the mechanisms behind how a Venus flytrap senses its prey and why some plants seemingly thrive in stressful conditions. 4. **How a Plant Knows Where It Is?** - This section explains how plants orient themselves in space, explaining mechanisms of gravity perception. It touches on historical and contemporary research, including insights obtained from experiments conducted on the International Space Station. 5. **What a Plant Remembers?** - The course takes a profound turn as it explores plant memory, from short-term responses to epigenetic memory passed down through generations. The module includes a guest lecture from a leading scientist which enriches the learning experience. 6. **The Aware Plant** - The final week prompts philosophical discussions about plant intelligence and consciousness. It culminates with a lab tour, providing a glimpse into ongoing plant research and offering an opportunity to meet other passionate learners and researchers. #### Course Structure and Accessibility "Understanding Plants - Part I: What a Plant Knows" thoughtfully balances advanced botanical concepts with accessible explanations, making it engaging for individuals with varied backgrounds in biology. The course is structured with a considerate pace, providing ample resources for deeper exploration while ensuring that those new to the subject won't feel overwhelmed. #### Personal Reflection and Recommendation I highly recommend this course for anyone intrigued by biology, environmental science, or simply the natural world. The interplay of science and curiosity is palpable throughout each module. With its enlightening lessons and hands-on experiments, you will not only learn about plants but also connect with a community of fellow enthusiasts who share your passion for the wonders of nature. Whether you're a student looking to enrich your biological studies, a nature lover, or just someone looking to cultivate a new interest, "Understanding Plants - Part I: What a Plant Knows" provides robust insights that are just as rewarding as they are educational. Enroll today, and embark on this captivating journey to uncover the hidden lives of plants!

Syllabus

Introduction

Welcome to "What a Plant Knows (and other things you didn't know about plants)". If you have not already, please review the Course Syllabus for general information about this course.

This week we start a systematic review of a plant's sensory systems by starting with plant responses to light. We will cover an overview of human vision, plant responses to light, Darwin's experiments showing plant responses to light, phototropism, phytochrome and flowering, and modern research on phototropism. In other words, this week we get into more advanced concepts in plant sensory biology. The last module is especially advanced, and will be clearer for those of you with a strong biology background. But do not fret, aside from very basic concepts, this module will NOT be included in the exam (you will not be responsible for understanding the intricacies of the experimental methods, etc.). If you have not already, please review the Course Syllabus for general information about this course.

This week we continue our systematic review of a plant's sensory systems by exploring responses to volatile chemicals (in other words, what a plant smells). We start with an overview of the plant cell, briefly review human olfaction (smell), and then explore how fruits know when to ripen. From there we go over three different experiments that explore plant responses to volatile chemicals and start exploring the controversial question, "Do plants communicate with each other?".

This week we continue our systematic review of a plant's sensory systems by exploring responses to tactile stimulation (in other words, what a plant feels). We start with an overview of the mechano-sensory system that differentiates between different tactile stimulations, briefly review the way electricity is used in neural communication, and then explore how the Venus flytrap knows when to close, and what powers the opening and closing of the Mimosa leaves. We'll learn how plants change their structure to cope with windy conditions, and go over some of the rather complex biology that is involved in the genetic response in plants to being touched. I'll let you know what I think of the question, Do plants feel pain? And then we'll try to understand whether plants hear, and if they do, which music they prefer.

This week we continue our systematic review of a plant's sensory systems by exploring the 6th sense - proprioception. We start with an overview of the proprioceptive system that allows us to keep our balance and to know where are body parts are in space. Theמ we will explore how plants know up from down, using both experiments from a few hundred years ago, and experiments conducted on the space station. We'll go over the structure of roots more in detail in order to understand where the cells are that sense gravity. We'll revisit phototropism, and learn what the chemical signal is in plants that allows them to respond to light and gravity. And lastly, we'll learn what makes a plant dance.

This week we move beyond survey of a plant's sensory systems, and explore how plants retain, store and recall sensory information. In other words, we ask the questions, What do plants remember? We'll try to define what we mean by "memory" and briefly review different types of human memory. The we'll look at the short-term memory found in the Venus fly trap, and the long term morphogenic memory first described 50 years ago by the Czech scientist Rudolf Dostal. We'll have a guest lecture from Prof. Nir Ohad about epigenetics and the long-term memory of winter, and even the role of epigenetics in trans-generational memory.

This is the final week in our journey through a plant's sense of the world. This week's lecture has two separate parts. In the first part, we continue last week's discussion of a plant's ability to remember to a more theoretical discussion on the definition of memory and consciousness. This leads us to the question, "Are plants intelligent?". We'll hear what some of the students in this class think of intelligence before finishing with a quick examination of "intelligence", and end with my own take on a plant's, and our place, in the world. In the second part we'll go for a tour of my lab and see our plant growth facilities. I'll give you a brief overview of one of the projects in my lab, and you'll meet a few of the students doing the research. And in the end, you'll even get to meet Dr. Aviva Katz.