Biochemical and molecular changes in response to aluminium-stress in highbush blueberry (Vaccinium corymbosum L.)

Show simple item record Nunes-Nesi, Adriano Inostroza-Blancheteau, Claudio Reyes-Díaz, Marjorie Aquea, Felipe Alberdi, Miren Arce-Johnson, Patricio 2018-09-27T00:34:57Z 2018-09-27T00:34:57Z 2011-09
dc.identifier.issn 09819428
dc.description.abstract Aluminium (Al) stress is an important factor limiting crop yields in acid soils. Despite this, very little is known about the mechanisms of resistance to this stress in woody plants. To understand the mechanisms of Al-toxicity and response in blueberries, we compared the impact of Al-stress in Al-resistant and Al-sensitive genotypes using Vaccinium corymbosum L. (Ericaceae) as a plant model. We investigated the effect of Al-stress on the physiological performance, oxidative metabolism and expression of genes that encode antioxidant enzymes in two V. corymbosum cultivars maintained hydroponically with AlCl3 (0 and 100 μM). Microscopic analyses of Al-treated root tips suggested a higher degree of Al-induced morphological injury in Bluegold (sensitive genotype) compared to Brigitta (resistant genotype). Furthermore, the results indicated that Brigitta had a greater ability to control oxidative stress under Al-toxicity, as reflected by enhancement of several antioxidative and physiological properties (radical scavenging activity: RSA, superoxide dismutase: SOD and catalase: CAT; maximum quantum yield: Fv/Fm, effective quantum yield: ФPSII, electron transport rate: ETR and non-photochemical quenching: NPQ). Finally, we analyzed the expression of genes homologous to GST and ALDH, which were identified in a global expression analysis. In the resistant genotype, the expression of these genes in response to Al-stress was greater in leaves than in roots. en
dc.format pdf pt-BR
dc.language.iso eng pt-BR
dc.publisher Plant Physiology and Biochemistry pt-BR
dc.relation.ispartofseries v. 49, n. 9, p. 1005- 1012, set. 2011 pt-BR
dc.rights Elsevier Masson SAS. pt-BR
dc.subject Blueberry pt-BR
dc.subject Aluminium-stress pt-BR
dc.subject Antioxidant genes pt-BR
dc.subject Fluorescence parameters pt-BR
dc.title Biochemical and molecular changes in response to aluminium-stress in highbush blueberry (Vaccinium corymbosum L.) en
dc.type Artigo pt-BR

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    Artigos Técnico-científicos na área de Biologia Vegetal

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