4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=10&confId=86">The Proceedings of SAIP2016</a> published on 24 December 2017

Exciton dynamics of individual plant light-harvesting complexes as revealed by fluorescence lifetime and intensity shifts.

6 Jul 2016, 11:50
20m
5C (Kramer Law building)

5C

Kramer Law building

UCT Middle Campus Cape Town
Oral Presentation Track C - Photonics Photonics

Speaker

Mr Joshua Botha (University of Pretoria)

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

The fundamental mechanisms involved in photosynthesis not only provide an opportunity to study physical principles that span over both classical and quantum scales but also take us a step closer to the development of viable alternative energy sources such as cheaper biofuel production and more effective photovoltaics. Some of said mechanisms play a critical role in the photoprotection of oxygenic photosynthetic organisms against high light intensities and are generally referred to as non-photochemical quenching (NPQ). In plants, the fast, reversible, energy-dependent component of NPQ (qE) likely takes place in the major light-harvesting pigment-protein complex (LHCII) and compete with the exciton dynamics that ensure efficient light harvesting. Recent time-resolved studies have revealed that single, isolated LHCII complexes exhibit binary switching between a bright and a dim emission state, a phenomenon called fluorescence intermittency, which is very likely related to slow protein conformational dynamics. We will show the fluorescence lifetime and intensity correlations of single LHCII complexes in NPQ states emulated to different degrees with a particular focus on the less frequently accessed intermediate levels.

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Main supervisor (name and email)<br>and his / her institution

Tjaart Krüger, Tjaart.Kruger@up.ac.za, University of Pretoria

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

Primary author

Mr Joshua Botha (University of Pretoria)

Co-authors

Mr Herman Stoltz (University of Pretoria) Mr Micahel Gruber (Vrije Universiteit of Amsterdam) Prof. Rienk van Grondelle (VU University Amsterdam) Dr Tjaart Krüger (University of Pretoria)

Presentation Materials

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