Morphological Root Responses and Molecular Regulation of Cation Transporters Are Differently Affected by Copper Toxicity and Cropping System Depending on the Grapevine Rootstock Genotype

Frontiers in Plant Science
Laura MarastoniTanja Mimmo

Abstract

The high copper (Cu) concentration in vineyard soils causes the increase of Cu toxicity symptoms in young grapevines. Recently, intercropping of grapevine and oat was shown to reduce Cu toxicity effects, modulating the root ionome. On these bases, the focus of the work was to investigate the impact of Cu toxicity of either monocropped or oat-intercropped grapevine rootstocks plants (196.17 and Fercal), at both phenotypic (i.e., root architecture), and molecular (i.e., expression of transporters) levels. The results showed a different response in terms of root morphology that are both rootstock- and cropping system dependent. Moreover, the expression pattern of transporter genes (i.e., VvCTr, VvNRAMP, and VvIRT1) in monocropped grapevine might resemble a Mn deficiency response induced by the excess of Cu, especially in Fercal plants. The gene expression in intercropped grapevines suggested rootstock-specific response mechanisms, depending on Cu levels. In fact, at low Cu concentrations, Fercal enhanced both root system growth and transporter genes expression; contrarily, 196.17 increased apoplast divalent cations accumulation and transporters expression. At high Cu concentrations, Fercal increased the expression of all bivalent ...Continue Reading

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Citations

Jun 18, 2020·Frontiers in Plant Science·Bilal A RatherNafees A Khan
Oct 29, 2020·Plant Physiology and Biochemistry : PPB·Sebastian B FeilStefano Cesco

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Methods Mentioned

BETA
electrophoresis
PCR

Software Mentioned

WinRhizo
Tmap
GraphPad Prism
CRIBI genome browser
FigTree
DDBJ ClustalW
Fercal
GraphPad
LinRegPCR
BlastP

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