Physiological and biochemical responses to manganese toxicity in ryegrass (Lolium perenne L.) genotypes

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datacite.alternateIdentifier.citationPLANT PHYSIOLOGY AND BIOCHEMISTRY,Vol.113,89-97,2017
datacite.alternateIdentifier.doi10.1016/j.plaphy.2017.02.003
datacite.creatorInostroza Blancheteau, Claudio
datacite.creatorReyes Diaz, Marjorie
datacite.creatorBerrios, Graciela
datacite.creatorRodrigues Salvador, Acacio
datacite.creatorNunes Nesi, Adriano
datacite.creatorDeppe, Mariana
datacite.creatorDemanet, Rolando
datacite.creatorRengel, Zed
datacite.creatorAlberdi, Miren
datacite.date2017
datacite.subject.englishAntioxidant capacity
datacite.subject.englishMn resistance
datacite.subject.englishOxidative stress
datacite.subject.englishPhotosynthesis
datacite.subject.englishRyegrass
datacite.titlePhysiological and biochemical responses to manganese toxicity in ryegrass (Lolium perenne L.) genotypes
dc.date.accessioned2021-04-30T16:59:16Z
dc.date.available2021-04-30T16:59:16Z
dc.description.abstractWe studied resistance to manganese (Mn) toxicity under acidic conditions and its relationship with nutrients such as calcium (Ca) and magnesium (Mg) in new perennial ryegrass (Lolium perenne L.) genotypes (One-50, Banquet-II and Halo-AR1) introduced in southern Chile, using the Nui genotype as the reference. Plants were grown in nutrient solution at increased Mn concentrations (0-750 mu M) at pH 4.8, and physiological and biochemical features were determined. Under higher Mn concentration, the One 50 genotype had a significantly lower relative growth rate (RGR) of shoots and roots, whereas in the other cultivars this parameter did not change under variable Mn treatments. Increasing the Mn concentration led to an increased Mn concentration in roots and shoots, with Banquet-II and Halo-AR1 having higher Mn in roots than shoots. Shoot Mg and Ca concentrations in all genotypes (except Banquet-II) decreased concomitantly with increasing Mn applications. In contrast to the other genotypes, Banquet-II and Halo-AR1 maintained their net CO2 assimilation rate regardless of Mn treatment, whereas the chlorophyll concentration decreased in all genotypes with the exception of Banquet-II. In addition, lipid peroxidation in Banquet-II roots increased at 150 mu M Mn, but decreased at higher Mn concentrations. This decrease was associated with an increase in antioxidant capacity as well as total phenol concentration. Banquet-II and Halo-AR1 appear to be the most Mn-resistant genotypes based on RGR and CO2 assimilation rate. In addition, Mn excess provoked a strong decrease in Ca and Mg concentrations in shoots of the Mn-sensitive genotype, whereas only slight variations in the Mn-resistant genotype were noted. When other evaluated parameters were taken into account, we concluded that among the perennial ryegrass genotypes introduced recently into southern Chile Banquet-II appears to be the most Mn-resistant, followed by Halo-AR1, with One-50 being the most sensitive. (C) 2017 Elsevier Masson SAS. All rights reserved.
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3789
dc.language.isoen
dc.publisherELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
dc.sourcePLANT PHYSIOLOGY AND BIOCHEMISTRY
oaire.resourceTypeArticle
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uct.indizacionSCI
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