Alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuce

ABSTRACT Excessive amounts of heavy metals (HMs) in the rooting media affect adversely plant growth, cause loss of yields, and undesirable effects on crops. The aim of this study was to investigate the effects of exogenous sodium nitroprusside (SNP) (200 μM), a nitric oxide (NO) donor, on t...

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Autor principal:	Samet,Halil
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2020
Materias:	Accumulation chlorophyll cobalt enzymatic activities growth Lactuca sativa nitric oxide
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392020000200161
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spelling	oai:scielo:S0718-583920200002001612020-11-30Alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuceSamet,Halil Accumulation chlorophyll cobalt enzymatic activities growth Lactuca sativa nitric oxide ABSTRACT Excessive amounts of heavy metals (HMs) in the rooting media affect adversely plant growth, cause loss of yields, and undesirable effects on crops. The aim of this study was to investigate the effects of exogenous sodium nitroprusside (SNP) (200 μM), a nitric oxide (NO) donor, on toxic cobalt (Co) level (200 μM) in iceberg lettuce (Lactuca sativa L. var. capitata). Plants were grown in a hydroponic system (modified Hoagland solution and perlite as inert media) inside a greenhouse under natural light conditions (average temperature 27-18 °C day-night and humidity 63%). Results indicated that excessive Co caused significant reductions in fresh (FW) and dry weights (DW) of the shoots and roots, photosynthetic pigment contents of leaves, and metallic cation concentration of shoots and roots. Also, hydrogen peroxide (H2O2), lipid peroxidation, proline accumulation, catalase (CAT) and ascorbate peroxidase (APX) activities, and total Co accumulation rate (TAR) increased significantly with excessive Co. Compared to Co application, Co+SNP application showed a 48.5% and 31.1% increase in FW and DWs, respectively. Moreover, chlorophyll (Chl) a, Chl b, Chl a+b and carotenoid (Car) content increased 54.5%, 64.4%, 56.6%, and 39.7%, respectively. Similarly, shoot Co uptake (69.7%), shoot and root Fe concentration (21.7% and 149.4%, respectively), root Zn concentration (6.1%), and net accumulation of Fe and Mn via roots (4.5- and 1.6-fold, respectively) were increased. Consequently, the alleviating effect of exogenous NO on Co toxicity in iceberg lettuce could depend on NO-induced increase in antioxidant enzyme activity and its multifunctional role in plant cellular mechanism.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.80 n.2 20202020-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392020000200161en10.4067/S0718-58392020000200161
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Accumulation chlorophyll cobalt enzymatic activities growth Lactuca sativa nitric oxide
spellingShingle	Accumulation chlorophyll cobalt enzymatic activities growth Lactuca sativa nitric oxide Samet,Halil Alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuce
description	ABSTRACT Excessive amounts of heavy metals (HMs) in the rooting media affect adversely plant growth, cause loss of yields, and undesirable effects on crops. The aim of this study was to investigate the effects of exogenous sodium nitroprusside (SNP) (200 μM), a nitric oxide (NO) donor, on toxic cobalt (Co) level (200 μM) in iceberg lettuce (Lactuca sativa L. var. capitata). Plants were grown in a hydroponic system (modified Hoagland solution and perlite as inert media) inside a greenhouse under natural light conditions (average temperature 27-18 °C day-night and humidity 63%). Results indicated that excessive Co caused significant reductions in fresh (FW) and dry weights (DW) of the shoots and roots, photosynthetic pigment contents of leaves, and metallic cation concentration of shoots and roots. Also, hydrogen peroxide (H2O2), lipid peroxidation, proline accumulation, catalase (CAT) and ascorbate peroxidase (APX) activities, and total Co accumulation rate (TAR) increased significantly with excessive Co. Compared to Co application, Co+SNP application showed a 48.5% and 31.1% increase in FW and DWs, respectively. Moreover, chlorophyll (Chl) a, Chl b, Chl a+b and carotenoid (Car) content increased 54.5%, 64.4%, 56.6%, and 39.7%, respectively. Similarly, shoot Co uptake (69.7%), shoot and root Fe concentration (21.7% and 149.4%, respectively), root Zn concentration (6.1%), and net accumulation of Fe and Mn via roots (4.5- and 1.6-fold, respectively) were increased. Consequently, the alleviating effect of exogenous NO on Co toxicity in iceberg lettuce could depend on NO-induced increase in antioxidant enzyme activity and its multifunctional role in plant cellular mechanism.
author	Samet,Halil
author_facet	Samet,Halil
author_sort	Samet,Halil
title	Alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuce
title_short	Alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuce
title_full	Alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuce
title_fullStr	Alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuce
title_full_unstemmed	Alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuce
title_sort	alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuce
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392020000200161
work_keys_str_mv	AT samethalil alleviationofcobaltstressbyexogenoussodiumnitroprussideiniceberglettuce
_version_	1714205397828501504

Alleviation of cobalt stress by exogenous sodium nitroprusside in iceberg lettuce

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