Plastid terminal oxidase ( PTOX) has the potential to act as a safety valve for excess excitation energy in the alpine plant species Ranunculus glacialis L.

The capacity to consume excess photosynthetic electrons by PTOX activity was investigated in R. glacialis shade‐ and sun‐leaves. PTOX protein content was highest in sun‐leaves and correlated to electron consumption attributed to PTOX. In R. glacialis leaves, PTOX may act as safety valve to prevent o...

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Bibliographic Details
Published in:Plant, Cell & Environment
Main Authors: LAUREAU, CONSTANCE, DE PAEPE, ROSINE, LATOUCHE, GWENDAL, MORENO‐CHACÓN, MARIA, FINAZZI, GIOVANNI, KUNTZ, MARCEL, CORNIC, GABRIEL, STREB, PETER
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2013
Subjects:
Ranunculus glacialis
Online Access:http://dx.doi.org/10.1111/pce.12059
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fpce.12059
https://onlinelibrary.wiley.com/doi/pdf/10.1111/pce.12059
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Summary:The capacity to consume excess photosynthetic electrons by PTOX activity was investigated in R. glacialis shade‐ and sun‐leaves. PTOX protein content was highest in sun‐leaves and correlated to electron consumption attributed to PTOX. In R. glacialis leaves, PTOX may act as safety valve to prevent overreduction of the electron transport chain and photoinhibition under conditions of varying light and temperature in the alpine environment.

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