Delivered on: 16 OCT 2023
In this session, we'll delve into the fascinating world of antenna systems and fluorescence resonance energy transfer (FRET). These concepts are fundamental to understanding how plants capture and utilize light energy for photosynthesis.
Video Transcript:
The organization of the uh an system antenna system. So, on the surface of the thylakoid membrane, in addition to the integral protein how many proteins you learn just now? What are they? PS2, PS1, Cytochrome and ATP synthase.
Okay in addition to these proteins, you have another structure to the membrane which is the antenna system. Okay antenna to send what? To to get the light somebody has to receive the light. ATP synthase is not going to receive the light yeah but there is a special story to this antenna system. Okay so this antenna system in essence it will have a number of chlorophylls per island of it. Meaning that there are many Islands on the surface. Let's say that this is the surface of your thylakoid membrane on this surface, it could be like maybe 1 million islands of antenna system and each antenna system could comprise or consist of 100 to 200 molecules of pigments. Okay one Island 200 molecules pigments molecule one island 100 molecules of pigment and and so on.
Okay and this energy will be absorbed by the antenna system for one reason so that it can direct the energy to the reaction center of an antenna system. So even though there could be a number of antenna system on a given thylakoid membrane each system will have one reaction center. Okay one raction center. Okay and the energy that is moved from one pigment to another pigment we call it FRET, fluoresence resonance energy transfer okay and this is nonradiative. Okay non- radiative meaning that it's purely physical meaning that one molecule absorb light energy and then it will vibrate and this vibrate will be sensed by the adjacent molecule to it and it will start to vibrate together it's pretty much like a tuning fork. You bang a tuning fork one tuning fork is “ngeeet” and then you have another tuning fork, if you touch them together, some of these frequency will be transfer to the second and then this one will “ngeeet” as well right and so on. But of course this one will “ngeeet” in a lot more calmer relax compared to the first “ngeeet” that “ngeeet” is called vibrational frequency.
Maybe it's mentioned in here somewhere I don't know maybe it's mentioned somewhere are a vibration of frequency oh at least you know I'm not scamming you.
Reference book: Plant Physiology and Development 7th Edition
by Lincoln Taiz, Ian Max Møller, Angus Murphy, Eduardo Zeiger
Full video: https://www.youtube.com/watch?v=dYs_TczAsM0&t=0s
Attribution 4.0 International — CC BY 4.0 - Creative Commons
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