Differential mechanisms between traditionally established and new highbush blueberry (Vaccinium corymbosum L.) cultivars reveal new insights into manganese toxicity resistance

dc.creatorGonzalez Villagra, Jorge
dc.creatorLuengo Escobar, Ana
dc.creatorRibera Fonseca, Alejandra
dc.creatorCárcamo Fincheira, Paz
dc.creatorPatricia Omena Garcia, Rebeca
dc.creatorNunes Nesi, Adriano
dc.creatorInostroza Blancheteau, Claudio
dc.creatorAlberdi, Miren
dc.creatorReyes Diaz, Marjorie
dc.date2021
dc.date2021-04-30T16:47:48Z
dc.date2021-04-30T16:47:48Z
dc.date.accessioned2021-06-14T22:03:33Z
dc.date.available2021-06-14T22:03:33Z
dc.identifierPLANT PHYSIOLOGY AND BIOCHEMISTRY,Vol.158,454-465,2021
dc.identifierhttp://repositoriodigital.uct.cl/handle/10925/3537
dc.identifier10.1016/j.plaphy.2020.11.034
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3299572
dc.descriptionIn acid soils, manganese (Mn) concentration increases, becoming toxic to plants. Mn toxicity differentially affects physiological processes in highbush blueberry (Vaccinium corymbosum L.) cultivars. However, the mechanisms involved in Mn toxicity of the new and traditionally established cultivars are unknown. To understand Mn toxicity mechanisms, four traditionally established (Legacy, Brigitta, Duke, and Star) cultivars and two recently introduced to Chile (Camellia and Cargo) were grown under hydroponic conditions subjected to control Mn (2 mu M) and Mn toxicity (1000 mu M). Physiological, biochemical, and molecular parameters were evaluated at 0, 7, 14, and 21 days. We found that the relative growth rate was reduced in almost all blueberry cultivars under Mn toxicity, except Camellia, with Star being the most affected. The photosynthetic parameters were reduced only in Star by Mn treatment. Leaf Mn concentrations increased in all cultivars, exhibiting the lowest levels in Camellia and Cargo. Brigitta and Duke exhibited higher beta-carotene levels, while Cargo exhibited a reduction under toxic Mn. In Legacy, lutein levels increased under Mn toxicity. Traditionally established cultivars exhibited higher antioxidant activity than the new cultivars under Mn toxicity. The Legacy and Duke cultivars increased VcMTP4 expression with Mn exposure time. A multivariate analysis separated Legacy and Duke from Camellia; Star and Cargo; and Brigitta. Our study demonstrated that Mn toxicity differentially affects physiological, biochemical, and molecular features in the new and traditionally established cultivars, with Legacy, Duke, Camellia, and Cargo as the Mn-resistant cultivars differing in their Mn-resistance mechanisms and Star as the Mn-sensitive cultivar.
dc.languageen
dc.publisherELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
dc.sourcePLANT PHYSIOLOGY AND BIOCHEMISTRY
dc.subjectCO2 assimilation
dc.subjectMn transporter
dc.subjectOxidative stress
dc.subjectPlant growth
dc.subjectStomatal density
dc.titleDifferential mechanisms between traditionally established and new highbush blueberry (Vaccinium corymbosum L.) cultivars reveal new insights into manganese toxicity resistance
dc.typeArticle


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