Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/25687
Title: Biophysical probing of Spartina maritima photo-system II changes during prolonged tidal submersion periods
Authors: Duarte, B. 
Santos, B. 
Marques, J. C. 
Caçador, I. 
Keywords: Sea level rise; Underwater photosynthesis; OJIP transients; PSII photochemistry; Biophysical probing of photosynthesis
Issue Date: 2014
Publisher: Elsevier Masson SAS
Serial title, monograph or event: Plant Physiology and Biochemistry
Volume: 77
Abstract: Submergence is one of the major constrains affecting wetland plants, with inevitable impacts on their physiology and productivity. Global warming as a driving force of sea level rise, tend to increase the submersion periods duration. Photosynthesis biophysical probing arise as an important tool to understand the energetics underlying plant feedback to these constrains. As in previous studies with Spartina maritima, there was no inhibition of photosynthetic activity in submerged individuals. Comparing both donor and acceptor sides of the PSII, the first was more severely affected during submersion, driven by the inactivation of the OEC with consequent impairment of the ETC. Although this apparent damage in the PSII donor side, the electron transport per active reaction centre was not substantially affected, indicating that this reduction in the electron flow is accompanied by a proportional increase in the number of active reaction centres. These conditions lead to the accumulation of excessive reducing power, source of damaging ROS, counteracted by efficient energy dissipation processes and anti-oxidant enzymatic defences. This way, S. maritima appears as a well-adapted species with an evident photochemical plasticity towards submersion, allowing it to maintain its photosynthetic activity even during prolonged submersion periods.
URI: http://hdl.handle.net/10316/25687
DOI: 10.1016/j.plaphy.2014.01.023
Rights: openAccess
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat
1-s2.0-S0981942814000370-main.pdf1.95 MBAdobe PDFView/Open
Show full item record

SCOPUSTM   
Citations

22
checked on Feb 18, 2020

WEB OF SCIENCETM
Citations

21
checked on Feb 18, 2020

Page view(s)

133
checked on May 27, 2020

Download(s)

121
checked on May 27, 2020

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.