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Plant Nutrition: Mineral Absorption | Part 1
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- เผยแพร่เมื่อ 30 ก.ย. 2019
- Special animated video made by our studio to explain the Mineral Uptake by Plants. Stay tuned for Part 2.
Like all living organisms, plants need nutrients for their proper growth and development. They get carbon, oxygen and hydrogen from air and water to carry out photosynthesis which is a very important process for plants. But what about mineral nutrients? Where do they get their mineral nutrients from? The answer is soil.
The presence of minerals in soil is a result of a) weathering of parent rocks. This means the parent rocks undergo various chemical and physical/ mechanical changes leaving behind these mineral elements in the soil as a result. b) by decomposition of organic matter in the soil. These minerals in soil are either in adsorbed (onto the soil particles) form or in dissolved form, so to absorb the minerals from the soil, plants use their roots, and in some cases their leaves.
The mineral nutrients absorbed have many functions and roles to play in the body of plants. They are constituents of various proteins, pigments, nucleic acids and enzymes. They also play roles in cell signaling and metabolism. Plants take up these mineral nutrients in the form of ions.
This uptake of minerals can be either a passive process termed as “passive transport or absorption” or an active process termed as ‘active transport or absorption”. Passive absorption takes place along the concentration gradient and usually requires no energy. Whereas active absorption occurs against the concentration gradient and requires energy.
The passive process of absorption can be explained by theories Diffusion theory, the ion exchange theory and Donnan’s Equilibrium.
DIFFUSION:
Diffusion is more thoroughly discussed in our video titled “What is diffusion.” You may want to check it out first. Here’s a quick summary.
When the concentration of mineral ions is higher in the external soil solution than the root, then the ions in the soil solution will move from a region of higher concentration, in this case the soil solution, to a region of lower concentration that is the roots.
This movement of molecules or ions is called diffusion. The ions keep moving inside until an equilibrium is reached. The reason that the ions are able to diffuse from the outside environment to the root cells is because of the apparent free space. Because of this free space the ions move freely in and out by diffusion.
However, when the ion concentration is low outside that is in the soil solution than the roots then proteins called carrier proteins facilitate movement of ions from the soil to the roots. This is referred to as facilitated diffusion.
Ion Exchange Theory
The surface of plant roots mainly carries a negative charge because of the carboxyl group of pectin and hemicellulose contained in their cell walls (Carpita and McCann 2000), Other compounds like proteins and phenols also contribute in formation of cell wall structure, due to presence of all these compounds ions can get adsorbed onto the root surface.
The ions (mainly cations) that are adsorbed on to the root surface are exchanged with the ions present in soil. The positively charged hydrogen ions adsorbed onto the surface of roots can easily be exchanged with cations of sodium and potassium present in the soil. Similarly, an anion like hydroxyl ion from the root cell can be exchanged with anion present in the soil.(See Overstreet and Jacobson, 1952).
Ion Exchange can be explained by Contact exchange theory and carbonic acid Exchange theory.
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This channel is so underated
Awesome video! I had never heard of anything other than cation exchange (and in the context of CEC) nor did I realize that it was only theoretical. Mind. Blown.
This was really good, I was doing some work in my science book, and didn’t understand, you really helped out, new subscriber. Thanks!
I took a regenerative farming class and they emphasized that roots can only absorb nutrients from the root tips. That's why plants with a bad root system will likely die within the first few years of their lives or they will not make it during a drought/ other environment struggles. They suggested doing air pruning when propagating or planting seeds to ensure the highest absorption of nutrients and therefore a higher survival rate.
i really appreciate your work. Your videos helps me a lot in icsce exam in India. You not not only make study videos but also spritual videos.
It was provided by my teacher and it really helped
I am very much satisfied in this vedio.
These animated videos are very good and helpful. Thanks
Excellent video to understand 👍👍👍👌👌👌
👍🏻👍🏻👍🏻👍🏻 very good video
Best explanation I have seen thus far
This video deserves more likes😊😊
This Is great , continue uploading videos
thanks for explaining
This is great. Thanks for this series!
Kurzgesagt VIBES
This was so helpful...thank you
wonderful explanation.
thanks
Wow, best video ever!
Is mineral upatake a passive transport???
Satisfied me this video,really helpful!
so cool how seemingly inanimate subatomic particles can arrange themselves into DNA code and complex structures which can then interact organically with elements (other arrangements of neighboring subatomic particles) in the soil to augment themselves into other negative entropy complex structures. heck, consciousness itself is just an organized arrangement of electrical energy which itself is comprised of these charged subatomic particles...there has to be some latent characteristic within the inanimate that gives rise to these animated interactions and lifeforms, i'd argue there is no such thing as truly inanimate.
Excellent video :)
Great . Thanks a lot sir 🙏
Loved the animation and the explanation 😊
I hope you can make another vid. About plants
more videos coming up stay tune
Great video and explanation, but that clicking sound can get pretty annoying.
Isn't it requires osmosis mechanism.
I got my answer to the query 😁😁
Just what I was looking for 🙏😄♥️
What about humen nutrition I want to know about that
I think that if you get your minerals from plants then they have already been processed for human use. Probably not the case with supplements
❣️
can you give references of journals and books for this theory
Please put subtitles below speak ing because my English not well to listen you
Theory? Are you saying we still don't know how exactly plants get their nutrients from soil?
Thanks for all your hardwork. Keep up the grind!
semangat i love you
How big are the minerals?
can be from 0.2 cm to 10 cm
Kurzgesagt!?
Pips from online classes hihi
Doesn’t this kinda look like the infographic show videos?
the sound effects are killing me lmao
I feel retarded , I’m so dumb it all sounded like another language
Why kurzgesagt is more popular?
Kurzgesagt is like 130,000 times more popular
presentation is too fast. Unable to understand.
L
Who is from Medico?
boi