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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
general
Temperature Effects on Pea Plants Probed by Simultaneous Measurements of the Kinetics of Prompt Fluorescence, Delayed Fluorescence and Modulated 820 nm Reflection
PLoS ONE, Volume 8, No. 3, Article e59433, Year 2013
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Description
Simultaneous in vivo measurements of prompt fluorescence (PF), delayed fluorescence (DF) and 820-nm reflection (MR) were made to probe response of pea leaves to 40 s incubation at high temperatures (25-50°C). We interpret our observation to suggest that heat treatment provokes an inhibition of electron donation by the oxygen evolving complex. DF, in a time range from several microseconds to milliseconds, has been thought to reflect recombination, in the dark, between the reduced primary electron acceptor QA- and the oxidized donor (P680+) of photosystem II (PSII). The lower electron transport rate through PSII after 45 and 50°C incubation also changed DF induction. We observed a decrease in the amplitude of the DF curve and a change in its shape and in its decay. Acceleration of P700+ and PC+ re-reduction was induced by 45°C treatment but after 50°C its reduction was slower, indicating inhibition of photosystem I. We suggest that simultaneous PF, MR and DF might provide useful information on assessing the degree of plant tolerance to different environmental stresses. © 2013 Oukarroum et al.
Authors & Co-Authors
Oukarroum, Abdallah
Switzerland, Geneva
Université de Genève
Canada, Montreal
Université du Québec à Montréal
Goltsev, Vasilij N.
Bulgaria, Sofia
Sofia University St. Kliment Ohridski
Strasser, Reto Jörg
Switzerland, Geneva
Université de Genève
Statistics
Citations: 99
Authors: 3
Affiliations: 3
Identifiers
Doi:
10.1371/journal.pone.0059433
ISSN:
19326203