Spectral diversity of photosystem I from flowering plants

Peter R. Bos, Christo Schiphorst, Ian Kercher, Sieka Buis, Djanick de Jong, Igor Vunderink, Emilie Wientjes*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Photosystem I and II (PSI and PSII) work together to convert solar energy into chemical energy. Whilst a lot of research has been done to unravel variability of PSII fluorescence in response to biotic and abiotic factors, the contribution of PSI to in vivo fluorescence measurements has often been neglected or considered to be constant. Furthermore, little is known about how the absorption and emission properties of PSI from different plant species differ. In this study, we have isolated PSI from five plant species and compared their characteristics using a combination of optical and biochemical techniques. Differences have been identified in the fluorescence emission spectra and at the protein level, whereas the absorption spectra were virtually the same in all cases. In addition, the emission spectrum of PSI depends on temperature over a physiologically relevant range from 280 to 298 K. Combined, our data show a critical comparison of the absorption and emission properties of PSI from various plant species.

Original languageEnglish
Pages (from-to)35-47
JournalPhotosynthesis Research
Volume155
Issue number1
Early online date19 Oct 2022
DOIs
Publication statusPublished - Jan 2023

Keywords

  • Absorption
  • Fluorescence
  • Light harvesting
  • Photosystem I
  • Spectroscopy

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