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title Low doses of Pb affected Lactuca sativa photosynthetic performance
authors Silva, S; Pinto, G; Santos, C
author full name Silva, S.; Pinto, G.; Santos, C.
title Low doses of Pb affected Lactuca sativa photosynthetic performance
nationality internacional
source PHOTOSYNTHETICA
language English
document type Article
author keywords abiotic stress; chlorophyll fluorescence; gas exchange; phytotoxicity; toxic metal
keywords plus LEAD TOXICITY; ANTIOXIDANT ENZYMES; MINERAL-NUTRITION; OXIDATIVE STRESS; SOLUBLE SUGARS; PISUM-SATIVUM; PLANTS; TOLERANCE; GROWTH; BIOMARKERS
abstract The effects of soil and water contamination by lead (Pb) and the consequences on plant growth and yield are of great concern worldwide. Limits of the Pb concentration in water have been established by governmental institutions but these differ from each other. In this study, Lactuca sativa (var. Reine de Mai) plants were exposed to low Pb(NO3)(2) doses (0.05-20 mg L-1), including the recommended limit values for irrigation water by the Food and Agriculture Organization (FAO). After 28 d of exposure, lettuce plants did not present visible morphological alterations or growth impairment, but CO2 assimilation rate (P (N)), photochemical quenching, and effective quantum efficiency of PSII were negatively affected, while intercellular CO2 concentration, stomatal conductance, or transpiration rate were not influenced. Our results suggested that limitations on photosynthesis occurred from different reasons than due to the decrease of internal CO2 availability, alterations of photophosphorylation, and/or electron transport rate. Thus, this lettuce cultivar showed photosynthetic susceptibility to low doses of Pb, even at lower concentrations than those maximal allowed for irrigation water by FAO. Furthermore, P (N) seemed to be the most sensitive biomarker for evaluation of Pb susceptibility.
author address [Silva, S.] Univ Aveiro, Dept Biol, CESAM, P-3810193 Aveiro, Portugal; [Silva, S.] Univ Aveiro, QOPNA, P-3810193 Aveiro, Portugal; [Pinto, G.] Univ Aveiro, Dept Biol, P-3810193 Aveiro, Portugal; [Pinto, G.] Univ Aveiro, CESAM, Lab Fungal & Plant Biol, P-3810193 Aveiro, Portugal; [Santos, C.] Univ Porto, Dept Biol, Fac Sci, Campo Alegre St, P-4169007 Oporto, Portugal; [Santos, C.] Univ Porto, GreenUP Citab UP, Campo Alegre St, P-4169007 Oporto, Portugal
reprint address Silva, S (reprint author), Univ Aveiro, Dept Biol, CESAM, P-3810193 Aveiro, Portugal.; Silva, S (reprint author), Univ Aveiro, QOPNA, P-3810193 Aveiro, Portugal.
e-mail address soniasilva@ua.pt
researcherid number Silva, Sonia/M-5076-2013
orcid number Silva, Sonia/0000-0003-1291-2667
funding agency and grant number QREN-POPH/FSE - Tipologia 4.1 - Formacao Avancada [FCT/BPD/74299/2010, SFRH/BPD/101669/2014]; FEDER [UID/AMB/50017]; FEDER/COMPET/POCI [POCI-01-0145-FEDER-006958, UID/AGR/04033/2013]; UI QOPNA [FCT UID/QUI/00062/2013]
funding text FCT/MCT supported S. Silva (FCT/BPD/74299/2010) and G. Pinto (SFRH/BPD/101669/2014) grants from the financing program QREN-POPH/FSE - Tipologia 4.1 - Formacao Avancada. We thank for the financial support to CESAM (UID/AMB/50017), to FCT/MEC through national funds, and the co-funding by the FEDER, within the PT2020 Partnership Agreement and Compete 2020, also this work was funded by FEDER/COMPET/POCI, POCI-01-0145-FEDER-006958 (UID/AGR/04033/2013) and UI QOPNA (Ref. FCT UID/QUI/00062/2013).
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cited reference count 38
times cited 1
total times cited count (wos, bci, and cscd) 1
publisher SPRINGER
publisher city DORDRECHT
publisher address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
issn 0300-3604
29-character source abbreviation PHOTOSYNTHETICA
iso source abbreviation Photosynthetica
publication date MAR
year published 2017
volume 55
issue 1
beginning page 50
ending page 57
digital object identifier (doi) 10.1007/s11099-016-0220-z
page count 8
web of science category Plant Sciences
subject category Plant Sciences
document delivery number EL2HU
unique article identifier WOS:000394441500006
link http://link.springer.com/article/10.1007/s11099-016-0220-z