Mechanisms of Plant Growth

We've gone over the various tiers of structure of a plant, from cells, to tissues, to organs and organ systems. Now it's time to better understand how plants grow. How to plants know when to grow? How do they know which direction to grow? All of this is regulated by plant hormones, which are signaling molecules, just like the ones that we have in our bodies, though they are totally different molecules than ours. Auxin, cytokinin, gibberellins, abscisic acid, and ethylene, what do these molecules do? What is gravitropism? What is phototropism? Let's learn all this and more!

Script by Sheryl Hosler

Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!

[faithaggrey]

Your videos helped me through college, and here I am watching your videos after college. Big thanks 🙂

[darkside]

All of a sudden plant growth is much more intresting

[glennpearson]

Ethylene? I'd have never guessed it. Thanks again, Professor Dave. Very informative work.

[lancetschirhart]

@Professor Dave Explains
I appreciate your capability and willingness to produce different kinds of content. It's all good.

[Daesma]

Dave the Savior. I'll watch your videos again and again during college, haha

[SuhaniBute-errx]

Thank you so much sir for the such a excellent explanation with animation. This is helping us to understand concepts clearly .

[Anonymous-ropt]

Prof. Dave, please do a video of Ethnopharmacology.

[rachelruiz]

Whoa there aren't many people here yet. Thanks Dave!

[lisetbuitrago]

Thank you! además de aprender botánica también aprendo inglés !

[baseeraslam]

wish you had made this playlist earlier, got an exam next week!!

[newpractice]

awesome! it's cool that there are all these chemicals responsible for the cool functions of plants. but how do the chemicals DO what they're doing?

[omarnaser]

Professor Dave hypothetically speaking can human evolve the ability to control their hormones?

[bloomingmindssonu]

It's chota packet bada dhamaka😍😍 loved hw precisely evrythng ws wrapped in it.. 👍

[brd]

Grass grows roots spread. Water cools. Feels.

[ruchikadayal]

Cytokinin looks like a modified Purine (adenine).

[nanjearmstrong]

Thanks very much sir I now understand this concept

[evadnajyone]

have a nice day to you professor, you make my day opss nice haircut😊.

[haniehsolatpour]

Appreciate for the important information that you explained simple and butifuly

[VinylUnboxings]

Does anyone know the name of the process by which plants adjust to be able to accommodate more light over a long period of time? For example, Monstera Deliciosa can be seen growing in full Hawaiian sun, but can burn from a couple hours of Midwestern direct sun through a window. They can be acclimated to more intense light slowly, but im curious by what mechanism this is possible.

Thank you!

[lukamtc]

I used to think that one of them made the plant grow vertically and one made them grow horizontally... these hormones will never make sense