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Printable Handouts
Navigable Slide Index
- Introduction
- What is a plant?
- Definition of plant
- Basic structures of plant
- Plant cells
- Photosynthesis
- Photosynthesis reaction
- Photosynthesis products
- Photosynthesis occurs (mainly) in leaves
- Phototropism
- Photoreceptors
- CO2 uptake
- Water and plant (1)
- Water and plant (2)
- Stomata
- Photosynthesis vs. transpiration
- Light stress
- Oxidative stress
- Plant adaptation
- Plant acclimation
- Photosynthetic acclimation (1)
- Photosynthetic acclimation (2)
- Nutrient uptake
- Plant symbiosis
- Summary
Topics Covered
- Plants as sessile, usually autotrophic organisms
- The photosynthesis process
- The transport system in the plant (xylem and phloem)
- Stomata as a double-edged sword
- Acclimation and adaptation of plants to their environment
- Symbiotic relationships of plants with fungi and bacteria
Talk Citation
Johnson, G. (2019, June 27). Plant physiology: a primer [Video file]. In The Biomedical & Life Sciences Collection, Henry Stewart Talks. Retrieved December 22, 2024, from https://doi.org/10.69645/UEWF7298.Export Citation (RIS)
Publication History
Financial Disclosures
- Dr. Giles Johnson has not informed HSTalks of any commercial/financial relationship that it is appropriate to disclose.
A selection of talks on Plant & Animal Sciences
Transcript
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0:00
Hello my name is Giles Johnson.
I'm a plant physiologist working at the University of Manchester in the UK.
This lecture today is going to introduce you to my subject,
and I've called it "Plant Physiology, A Primer".
0:12
So when talking about plants,
the first thing we really need to consider is what is a plant?
If I asked you that question probably,
an image will come in your mind it will look something like this.
So it will be a green thing.
It'll have leaves which are flat green structures.
It may have flowers, and if you pull it out of the ground,
it will have a rigged system.
But when we talking scientifically about plants,
we need to go into a little bit more detail and really know what we're talking about.
So at that point, I commonly turn to a dictionary for a formal definition.
0:41
So this I've taken from the Oxford English dictionary.
So here they have a definition of a plant "as
being a living organism other than an animal,
which is able to subsist wholly on inorganic substances."
This is a very important feature about plants.
Is not true of all plants,
but it is a general trend in the plant kingdom.
Typically, a plant will be fixed to a substrate.
We say that plants don't move around very much.
Again, there are some exceptions.
But generally speaking, plants don't walk around.
They have the characteristic of having cells which is surrounded by cellulose cell wall.
Finally, the majority of plants survive by carrying out a process called photosynthesis.
So we can summarize that in two words.
Firstly, we say plants are autotrophic,
that means they live on inorganic substances, and specifically,
that they are photoautotrophic,
they live on light as their source of energy,
and we say that they are sessile,
they do not move around.
These two characteristics are important in defining what a plant is.