, Volume 226, Issue 4, pp 889–895

The E subunit of photosystem I is not essential for linear electron flow and photoautotrophic growth in Arabidopsis thaliana

Original Article

DOI: 10.1007/s00425-007-0534-y

Cite this article as:
Ihnatowicz, A., Pesaresi, P. & Leister, D. Planta (2007) 226: 889. doi:10.1007/s00425-007-0534-y


PSI-E is part of the stromal side of photosystem I (PSI). In Arabidopsis thaliana, the two nuclear genes PsaE1 and PsaE2 code for PSI-E, and transcripts of PsaE1 are markedly more abundant than PsaE2 transcripts. Stable null alleles of the two PsaE genes, psae1-3 and psae2-1, were identified and characterised. The psae2-1 mutant exhibited wild-type like PSI-E abundance and photosynthetic performance, whereas in the psae1-3 mutant PSI-E accumulation was decreased by 85%, together with an impaired thylakoid electron flow and plant growth rate. The psae1-3 psae2-1 double mutant totally lacked PSI-E but was still able to grow photoautotrophically, implying that PSI-E is not essential for PSI accumulation and thylakoid electron flow.


Arabidopsis Mutant Photosynthesis Photosystem I PSI-E 



Light-harvesting complex I (II)


Oxygen-evolving complex


Polyacrylamide gel electrophoresis


Photosystem I (II)


Wild type

Supplementary material

425_2007_534_MOESM1_ESM.pdf (22 kb)
ESM 1 (PDF 22 kb)

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Anna Ihnatowicz
    • 1
  • Paolo Pesaresi
    • 2
  • Dario Leister
    • 3
  1. 1.Abteilung für Pflanzenzüchtung und GenetikMax-Planck-Institut für ZüchtungsforschungKölnGermany
  2. 2.Dipartimento di Produzione VegetaleUniversità Statale di Milano c/o Parco Tecnologico Padano Via EinsteinLodiItaly
  3. 3.Lehrstuhl für Botanik, Department Biologie ILudwig-Maximilians-Universität MünchenMünchenGermany

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