Biochemical, physiological and genetic analysis of aluminum tolerance of different rye species



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Santos, E. and Pinto-Carnide, O. and Figueiras Merino, Ana Margarita and Benito Jiménez, César and Matos, M. (2019) Biochemical, physiological and genetic analysis of aluminum tolerance of different rye species. Environmental and Experimental Botany, 162 . pp. 87-94. ISSN 0098-8472

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Aluminum (Al) toxicity is the major limitation for crop productivity in acid soils which are widespread all overthe world. Plant species differ in their responses to this abiotic stress having developed resistance mechanisms todetoxify and tolerate Al both internally and externally. Rye (Secale cerealeL.) is one of the most Al-tolerant cerealwith a valuable genetic background for breeding purposes. Wild relatives (Secalespp.) have great importanceonce they can provide new sources of genes related to this trait. Different cellular disorders possibly related to Altolerance/toxicity were observed through histochemical root staining methods in cultivated and wild ryes and acorrelation was found. Moreover, expression studies of seven candidate Al-tolerance genes (ScALMT1,ScMATE2,ScSTOP1,ScMDH1,ScMDH2,ScCu/ZnSODandScMnSOD) were performed in roots and shoots offive wild ryes.All genes seems to have an active contribution on Al resistance mechanisms of these ryes, however,ScALMT1andScMATE2genes clearly have a key role in the Al-tolerance increment. Al tolerance inSecalegenus seems tobe a genetically complex trait where different resistance mechanisms coexist, due to several genes whose cu-mulative effects improves the ability to withstand Al phytotoxicity

Item Type:Article
Uncontrolled Keywords:Al toxicity, Secale spp., Histochemical staining, Al resistance mechanisms, Genes expression
Subjects:Medical sciences > Biology > Biochemistry
Medical sciences > Biology > Plant physiology
Medical sciences > Biology > Genetics
ID Code:57009
Deposited On:16 Sep 2019 14:49
Last Modified:16 Sep 2019 14:49

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