OLT#8 Imaging Autotrophs

Summary

Highlights

• Dr. Col Harrison introduces the captivating world of imaging autotrophs and how we can explore plant structures using technology, much like in medical fields. 📡
• The electromagnetic spectrum is crucial in understanding plant pathways, with tools like carbon-14 tracking helping us dive deeper. 📊
• 3D imaging in plants is comparable to capturing a tennis match, offering a full view of plant health and structure. 🎥
• Infrared radiation opens up the unseen world inside plants, showing us temperature changes and water flow! 🔥
• MRI techniques provide a sneak peek into root health without disturbing the plant's anchor system. 🌳

Key Takeaways

• Imaging technology lets us peek into plant processes without cutting them open. 🌿
• Carbon-14 is a superstar in tracking plant substance movements! 🔍
• 3D imaging gives plants their moment in the spotlight, just like tennis players! 🎾
• Infrared helps us see plant processes we can't see with the naked eye. 🌈
• MRI isn't just for humans; it helps study plant roots too! 🌱

Overview

Chapters

• 00:00 - 00:30: Introduction to Year 11 Biology Module 2 This chapter introduces Year 11 Biology Module 2, focusing on the organization of living things. The video is the eighth in the series and serves as an introduction to the module.
• 00:30 - 01:00: Imaging Autotrophs and Plant Structures The chapter discusses methods for investigating the structures of autotrophs (organisms that produce their own food) using imaging technologies. It explores how these techniques allow scientists to track substances within plants and gain insights into their internal workings without invasive procedures. These advances are likened to medical imaging technologies that examine human bodies non-invasively.
• 01:00 - 01:30: Tracking Substances in Plants The chapter discusses the ability to track substances in plants by utilizing their water-soluble characteristics. By taking advantage of parts of the electromagnetic spectrum, scientists can observe how these substances dissolve in water and move through different parts of a plant. This tracking helps understand how substances are transported within the plant.
• 01:30 - 02:00: Electromagnetic Spectrum in Plant Imaging This chapter explores the role of the electromagnetic spectrum in plant imaging. It details how isotopes, such as carbon-14, are moved and incorporated into plant structures. Carbon-14 can form carbon dioxide, diffusing through the plant, and be incorporated into sugars like glucose. The chapter examines the journey of glucose after its formation during photosynthesis, highlighting the application of electromagnetic spectrum in observing these processes.
• 02:00 - 02:30: Radioisotopes and Photosynthesis The chapter explores the electromagnetic spectrum, highlighting its broad range of wavelengths. It discusses how this spectrum extends beyond visible light, encompassing higher energy levels including gamma radiation. Gamma radiation, commonly emitted by radioactive nuclei, is emphasized as being detectable due to its high energy and short wavelength properties.
• 02:30 - 03:00: Wavelengths and Frequencies in Plant Imaging The chapter titled 'Wavelengths and Frequencies in Plant Imaging' discusses the spectrum of wavelengths used in plant imaging. It explains the relationship between wavelengths and frequencies, noting that as one moves to the right on the spectrum diagram, wavelengths increase, while moving to the left increases frequency and decreases wavelength. It assumes the constant speed of light, which correlates frequency and wavelength.
• 03:00 - 03:30: Imaging Technologies for Plants The chapter discusses various imaging technologies used for studying plants. It highlights the use of components of the infrared spectrum, radioisotopes, and magnetic resonance imaging in plant studies. The chapter draws parallels to imaging techniques used in animals, such as x-rays, and explores how similar technologies can be applied to plant sciences.
• 03:30 - 04:00: 3D Imaging in Plant Studies The chapter '3D Imaging in Plant Studies' emphasizes the utility of 3D imaging techniques in understanding plant structures. The text points out that plants do not move, facilitating the process of taking photographs to create 3D models. This method offers a straightforward approach to studying and analyzing plant structures without the complication of movement.
• 04:00 - 05:00: Infrared Radiation in Plant Studies This chapter discusses how infrared radiation is utilized in plant studies, comparing it to panoramic photography techniques used in smartphones. These techniques allow for capturing 3D images, similar to those used in sports broadcasting, such as tennis pre-COVID, by combining multiple camera angles for a virtual 3D representation.
• 05:00 - 06:00: Fluorescence and Radioisotope Tracking This chapter explores the application of fluorescence and radioisotope tracking to understand various phenomena, such as plant health. Techniques similar to those used in sports analysis, like visualizing actions during a tennis serve or forehand, are employed in this field. These methods provide comprehensive information, including the number of leaves on a plant and their distribution, thereby helping build a 3D picture of the subject under study. The chapter highlights the potential of cross-disciplinary techniques in gathering detailed insights.
• 06:00 - 07:00: MRI and Root Studies The chapter 'MRI and Root Studies' delves into the different types of infrared radiation within the electromagnetic spectrum, specifically focusing on far infrared and near infrared. It highlights the applications of these infrared types, emphasizing that far infrared radiation can be felt as heat from devices like bar heaters and is useful for detecting temperature differences. The chapter likely explores how these concepts are applied in studies involving MRI (Magnetic Resonance Imaging) and root analysis.
• 07:00 - 08:00: Using Carbon 14 in Plant Studies The chapter titled 'Using Carbon 14 in Plant Studies' discusses methods for studying plant processes using different wavelengths of light within the visible spectrum. A technique mentioned involves detecting water movement through plants. Another key focus is on carbohydrates, abbreviated as CH, to simplify notation during explanations. The chapter also introduces the concept of fluorescence, particularly the use of blue light, as a tool for studying plants.
• 08:00 - 09:30: Conclusion and Further Exploration In this chapter, the discussion focuses on the use of fluorescence to track photosynthesis in plants. The process involves the possible use of radioisotopes, such as carbon-14, to trace carbon dioxide movement through photosynthesis. The chapter delves into methodologies for monitoring plant processes and emphasizes experimentation with fluorescence and isotopes for understanding photosynthetic pathways.

OLT#8 Imaging Autotrophs Transcription

• 00:00 - 00:30 [Music] hi students welcome to year 11 biology and module 2 the organization of living things this is video number eight and we're going to just talk briefly about
• 00:30 - 01:00 Imaging autot trops what we need to do is investigate the structures of autot trops through the examination of a variety of materials such as using Imaging Technologies to determine plant structures so how do we track substances in plants how do we know what's going on well we know um that um in certainly in terms of medical advances there's a lot of techniques that we can use now to understand parts of the body without actually cutting them open so the main way that we do that is through the use
• 01:00 - 01:30 of parts of the electromagnetic spectrum we take advantage of the fact that there are a lot of substances that are water soluble that is that they will dissolve in water and therefore and if they are water soluble then that means they'll be able to um pass into a part of the plan that may well then be transported elsewhere so what we can do is we can follow the pathways through the plant now this may been the case if um the substance is
• 01:30 - 02:00 being moved but then is actually being dropped off somewhere and then incorporated into structures one of the things that we will look at is a very important isotope carbon 14 um which can exist as carbon dioxide which can move diffused through the plant but it can also uh then be incorporated into sugars for example such as glucose and then we can see what happens to that glucose after it's formed in the process of photosynthesis the electromagnetic
• 02:00 - 02:30 spectrum provides a huge range of possible wavelengths of light for us to look at um and what it does is it goes beyond just the visible parts of light that we can see that uh classic rainbow uh through into um higher energy so right at the um gamma radiation which is what we often find being released in um by radioactive nuclei um that we can we can detect those very high energy very short
• 02:30 - 03:00 wavelengths um right down to the other end of the Spectrum which is very long um radio waves and um long wavelengths and very low energy so uh we increase wavelengths as we go to the uh right in the diagram on the screen uh and increase frequency as we go to the left so that decreases the wavelength they're all assuming the speed of light so therefore um that's a function of frequency and and wavelength and so
• 03:00 - 03:30 therefore um those two things will um be inversely related to one another as one goes up the other one comes down now in um plants for plants what we're going to be looking at is the fact that there's components of the infrared spectrum that we can use there's also as I mentioned radioisotopes that we can use um there's some magnetic resonance imaging that's also used uh with plants so if you think about the sort of techniques that are being used in in animals uh x-rays um
• 03:30 - 04:00 then those sorts of things can also generally speaking most of the time also be used um for working out what's going on in terms of plant structure so here's a couple just to look at um one of the things that we can look at is some general 3D imaging so this occurs very very simply by uh for example um just literally taking photos of uh a plant the thing with plants is they don't run away when you're trying to um study them so they just sit there so what you can do do is sort of take uh 3DS and uh
• 04:00 - 04:30 images well effectively what you'll be doing it's like those Panorama shots that people can now take with iPhones and smartphones and things like that where you take lots of photos and you can kind of pan all the way around you get this this 3D imaging uh they use that quite um effectively now at the tennis or at least um before Co when they were playing tennis uh and and that was a technique where they were able to from all of these um different camera angles actually show virtually three thre dimensional um
• 04:30 - 05:00 360° image of what was going on during a serve or a forehand or something like that these sorts of techniques are fantastic often um techniques that are used in one field of endeavor can be used in others and this gives us some some ideas about the General Health of plants you know the number of leaves their distribution their General Health uh and it can give us some a lot of information just um in in building up a literal three-dimensional picture of what's going on uh with the
• 05:00 - 05:30 plant infrared uh radiation which is part of our electromagnetic spectrum is another one and there are two types that you want to look at here um are what are called far infrared and near infrared um and the different ones are associated with um either temperature infrared uh radiation is the sort of stuff you can feel from um heaters for example bar heaters that um is a really good way for detecting differences in temperature uh near infrared a little bit closer to the
• 05:30 - 06:00 uh wavelengths of light that are part of the visible spectrum uh we can detect water Mo movement through the plant we can also look I've I've abbreviated carbohydrates carbo hydrates just as CH because it's messy writing that all the time so I'll tell you that now and hopefully when you see it written later on uh you'll remember that what that is fluoresence is another thing that we can use usually blue light
• 06:00 - 06:30 um which which may or may not be successful in allowing um us to see some fluoresence uh and usually that's about trying to track the rate of photosynthesis through the plant I mentioned radioisotopes tracing um the movement of for example carbon so if we have uh carbon dioxide but we are able to introduce some uh carbon 14 into that carbon dioxide and it goes into a process like photosynthesis
• 06:30 - 07:00 then that can um mean that it can produce something like a glucose molecule and if we've uh Incorporated some carbon 4 into that glucose molecule then we can detect it with the with a Gaga caner and I'll look at that in in the next slide MRIs are good too for roots you don't want to be studying Roots by digging the plant up the roots have a very important um role in absorbing water for the plant but also they're very U much about helping um
• 07:00 - 07:30 stability and support for the plant so if you start hecking around its roots um that's going to do some serious damage so we want to be able sometimes to have a look at the root systems see what's happening see how healthy they are and we can only and we want to try and do that without doing damage to the plan itself so looking at MRIs in those situations can be quite helpful so what happens if we're using something like carbon 14 as I said carbon 14 can actually be introduced into a in the form of carbon dioxide um often we can
• 07:30 - 08:00 do that with just a chemical reaction inside of a bell jar that allows the the carbon dioxide to form as a result of a chemical reaction usually um an acid carbonate reaction does that for you uh the carbon dioxide then of course can be taken up by the plant through the stomates stomata and um and through the process of photosynthesis be converted into a glucose molecule
• 08:00 - 08:30 of course not all of the carbons in the glucose molecule need to be carbon 14 but as long as there's one there that means we can track what's actually happening to this molecule uh by uh using something just as simple as a Gea counter uh a PL as small as this obviously we may get uh some positive reactions to our um Gaga counter from a number of different places maybe from the leaf itself maybe from the stem potentially from The Roots
• 08:30 - 09:00 but for larger plants too we can also look at this um and just see if we can start to track what's actually happening to um these types of materials as they move through plants uh there's a couple of different uh examples that you have a look at there's a few nice ones in your textbook that show you some uh ways in which we can track uh different types of materials through plants using these sorts of techniques but the components of the electromagnetic spectrum very very important uh when we're looking at how we do this uh this is just a bit of
• 09:00 - 09:30 an introduction hopefully you'll have an opportunity to look at a few more things in a little bit more detail thanks for watching