Acclimation to environmentally relevant Mn concentrations rescues a cyanobacterium from the detrimental effects of iron limitation

Eitan Salomon, Nir Keren*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The functions of micronutrient transition metals in photosynthetic organisms are interconnected. So are the effects of their limitation. Here we present evidence for the effects of Mn limitation on Fe limitation responses in the cyanobacterium Synechocystis sp. PCC 6803. Low Mn acclimated cells were able to detect and respond to iron insufficiency by inducing specific Fe transporters. However, they did not bleach, lose additional photosystem I activity and did not induce isiA transcription. Induction of the isiAB operon is a hallmark of iron limitation, and the isiA protein is considered to be central to the acclimation of the photosynthetic apparatus. Our results suggest that acclimation to environmentally relevant Mn concentrations that much lower than those used in laboratory experiments reduces the detrimental effects of iron limitation and modifies iron stress responses.

Original languageAmerican English
Pages (from-to)2090-2098
Number of pages9
JournalEnvironmental Microbiology
Volume17
Issue number6
DOIs
StatePublished - 1 Jun 2015

Bibliographical note

Publisher Copyright:
© 2015 Society for Applied Microbiology and John Wiley & Sons Ltd.

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