Original video: https://youtu.be/dV25aC9Zyyo
Welcome to the fascinating world of plant physiology! This introductory video explores the realm of Plant Growth Regulators (PGRs), also known as plant hormones or phytohormones. We'll delve into the meaning of the word "hormone" itself, tracing its roots back to the Greek word for "to excite." Discover how these natural chemical messengers, produced throughout the plant, regulate growth, development, and responses to the environment. We'll also clarify the distinction between naturally occurring plant hormones and synthetic PGRs used in agriculture. Unlike animals, plants don't have specialized glands, so we'll uncover why and how plants produce hormones in a decentralized manner. Get ready to learn about the unique aspects of plant hormone production and action!
Video Transcript:
There are many synonyms, but they all mean the same. So, plant growth regulators, uh, can be described as PGR, you know, growth substance, plant growth hormones, or phytohormones, yeah. But, um, since hormones in plants are regularly used in synthetic forms, that's why you can see that sometimes people don't use the word "hormones" for plants, they use "regulator" because they have a specific intention to make certain things happen to the plant, and if that was the natural process, it wouldn't happen, okay?
So, that's why the word "hormones," um, is used pretty much like our government likes to use the word "incentive" because they do not like to use the word "subsidy." Because "subsidy" sounds like you are very spoiled, right? Therefore, they use the word "incentive," but actually, the root of it is kind of the same, yeah. People still receive money, uh, for doing something, right?
And it originated from the Greek word "hormone," which means "to excite," meaning that originally, everything is in the ground state, nothing exciting happening. And then when a hormone comes into the story, things get excited. And it is a natural chemical messenger, transported, meaning that hormones not necessarily stay in one place. It moves from one location to other locations to the targeted cells, right?
And it is needed, like vitamins and minerals, only in minute concentrations, okay? You do not need, um, hormones as much as you need carbohydrates, no. Because this is to trigger, okay? To trigger means the organ is already capable of doing that particular process, you just need to tell it to do so, yeah? And if you're poking the organ too much, that's not going to yield any meaningful results because that might damage the organ. That's why it's only a very minute amount needed.
And another terminology is the phytohormones. "Phyto" means "plant," simply so, plant hormone, phytohormone. And it has been around since, like, 70, 80 years back. Why, why use different synonyms for this? Phytohormones, plant growth regulators, for phytohormones, when you see certain texts or people use this, they are actually referring it to as the organic compound, naturally produced in plants.
If you're talking about the other synonym with this, plant growth regulators, that could be synthetic, right, yeah? So, hormones, there is a natural connotation associated with it. You wouldn't use the word "growth regulators" for humans, right? "Why do you hit puberty?" "Oh, because my organs are producing growth regulators that make me do so." No, you use the word "hormones." So, there is an innate association with it. Hormones are natural, growth regulators, synthetic or unnatural.
Since both plants and humans are producing hormones, what are the key differences? Because these are two different organisms, after all. Unlike in animals, plant hormones, as it says, are not produced in specialized tissues or cells, meaning that plants do not have glands. You know, glands, glands, glands, glands, do you have glands? What glands do you have?
There are a number of glands. You, you got your pituitary gland, you got your adrenal gland, pineal gland, right? And all of these glands produce specific kinds of hormones in humans. But in plants, that is not the case. Pretty much any cell is capable of producing the hormones, yeah? But usually, it's rather, um, located or regionalized within the plants.
Because, why, is there a difference in this? Why, we are very targeted for that. Well, to, to start with, um, humans are mobile, we can move on and about, we have more interactions with our environment, okay? For, for plants, it's pretty much, um, sedentary. And the circulation system is not like humans. Humans have a heart to pump the blood and to circulate. Plus, they do not have that So, if they restrict the hormones only for certain cells, they are going to miss out on certain, um, signal receptor events, because there is no special circulation to force it to go all the way to the end of the plant, okay? It can reach there, but it's rather slow. It's not like humans, you can pump the blood within your body within minutes, you know. If the blood starts from the heart, coming back, coming back to the heart, it will only take minutes, okay? But for plants, that might take some time to happen, maybe hours or maybe days. So, rather than waiting for the bodily fluid to reach the entire body, just produce the hormones wherever it's needed. So, that, that's why plants have multiple places to produce the hormones, yeah.
Keywords: Plant physiology, Plant hormones, Plant growth regulators, Phytohormones.
Watch full video: https://youtu.be/wuspDfZHpho
Attribution 4.0 International — CC BY 4.0 - Creative Commons
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