Chlorophyll a fluorescence in sweet potatoes under different copper concentrations

Photosynthesis is one of the main plant metabolic processes affected by copper deficiency and toxicity. The objective of this study was to evaluate the effects of different copper concentrations on transient chlorophyll a fluorescence and modulated fluorescence in sweet potatoes. Sweet potatoes were...

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Autores principales:	Cuchiara,C.C, Silva,I.M.C, Dalberto,D.S, Bacarin,M.A, Peters,J.A
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2015
Materias:	Micronutrient photosynthesis copper sulphate fluorescence transient modulated fluorescence
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000100015
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spelling	oai:scielo:S0718-951620150001000152015-06-08Chlorophyll a fluorescence in sweet potatoes under different copper concentrationsCuchiara,C.CSilva,I.M.CDalberto,D.SBacarin,M.APeters,J.A Micronutrient photosynthesis copper sulphate fluorescence transient modulated fluorescence Photosynthesis is one of the main plant metabolic processes affected by copper deficiency and toxicity. The objective of this study was to evaluate the effects of different copper concentrations on transient chlorophyll a fluorescence and modulated fluorescence in sweet potatoes. Sweet potatoes were placed in a hydroponic system and grown for six days with a complete nutrient solution. The plants were then transferred to solutions with different copper concentrations (0.041, 0.082, 0.123 and 0.164 mM) for nine days. The solutions were renewed every three days, and the plants were evaluated at the end of the experiment. Increased copper availability (0.123 and 0.164 mM) positively influenced the structure and functionality of photosystem I (PSI). The increase in Cu availability also reduced the apparent electron transport rate in the PSII [ETR(II)], and the plants treated with 0.082 and 0.123 mM Cu were able to dissipate the excess light energy in the PSII and protect its units (NPQ and qN). A joint analysis of the data shows that high copper concentrations in the nutrient solution lead to reduced photochemical activity of the PSII, increased dissipation of light energy from this same photosystem and increased PSI efficiency in sweet potatoes.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.15 n.1 20152015-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000100015en10.4067/S0718-95162015005000015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Micronutrient photosynthesis copper sulphate fluorescence transient modulated fluorescence
spellingShingle	Micronutrient photosynthesis copper sulphate fluorescence transient modulated fluorescence Cuchiara,C.C Silva,I.M.C Dalberto,D.S Bacarin,M.A Peters,J.A Chlorophyll a fluorescence in sweet potatoes under different copper concentrations
description	Photosynthesis is one of the main plant metabolic processes affected by copper deficiency and toxicity. The objective of this study was to evaluate the effects of different copper concentrations on transient chlorophyll a fluorescence and modulated fluorescence in sweet potatoes. Sweet potatoes were placed in a hydroponic system and grown for six days with a complete nutrient solution. The plants were then transferred to solutions with different copper concentrations (0.041, 0.082, 0.123 and 0.164 mM) for nine days. The solutions were renewed every three days, and the plants were evaluated at the end of the experiment. Increased copper availability (0.123 and 0.164 mM) positively influenced the structure and functionality of photosystem I (PSI). The increase in Cu availability also reduced the apparent electron transport rate in the PSII [ETR(II)], and the plants treated with 0.082 and 0.123 mM Cu were able to dissipate the excess light energy in the PSII and protect its units (NPQ and qN). A joint analysis of the data shows that high copper concentrations in the nutrient solution lead to reduced photochemical activity of the PSII, increased dissipation of light energy from this same photosystem and increased PSI efficiency in sweet potatoes.
author	Cuchiara,C.C Silva,I.M.C Dalberto,D.S Bacarin,M.A Peters,J.A
author_facet	Cuchiara,C.C Silva,I.M.C Dalberto,D.S Bacarin,M.A Peters,J.A
author_sort	Cuchiara,C.C
title	Chlorophyll a fluorescence in sweet potatoes under different copper concentrations
title_short	Chlorophyll a fluorescence in sweet potatoes under different copper concentrations
title_full	Chlorophyll a fluorescence in sweet potatoes under different copper concentrations
title_fullStr	Chlorophyll a fluorescence in sweet potatoes under different copper concentrations
title_full_unstemmed	Chlorophyll a fluorescence in sweet potatoes under different copper concentrations
title_sort	chlorophyll a fluorescence in sweet potatoes under different copper concentrations
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000100015
work_keys_str_mv	AT cuchiaracc chlorophyllafluorescenceinsweetpotatoesunderdifferentcopperconcentrations AT silvaimc chlorophyllafluorescenceinsweetpotatoesunderdifferentcopperconcentrations AT dalbertods chlorophyllafluorescenceinsweetpotatoesunderdifferentcopperconcentrations AT bacarinma chlorophyllafluorescenceinsweetpotatoesunderdifferentcopperconcentrations AT petersja chlorophyllafluorescenceinsweetpotatoesunderdifferentcopperconcentrations
_version_	1714206506898948096

Chlorophyll a fluorescence in sweet potatoes under different copper concentrations

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