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The ABC Transporter ABCG1 Is Required for Suberin Formation in Potato Tuber Periderm
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The ABC Transporter ABCG1 Is Required for Suberin Formation in Potato Tuber Periderm
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Journal Article
The ABC Transporter ABCG1 Is Required for Suberin Formation in Potato Tuber Periderm
2014
Overview
The lipid biopolymer suberin plays a major role as a barrier both at plant-environment interfaces and in internal tissues, restricting water and nutrient transport. In potato (Solanum tuberosum), tuber integrity is dependent on suberized periderm. Using microarray analyses, we identified ABCG1, encoding an ABC transporter, as a gene responsive to the pathogenassociated molecular pattern Pep-13. Further analyses revealed that ABCG1 is expressed in roots and tuber periderm, as well as in wounded leaves. Transgenic ABCG1-RNAI potato plants with downregulated expression of ABCG1 display major alterations in both root and tuber morphology, whereas the aerial part of the ABCG1-RHAI plants appear normal. The tuber periderm and root exodermis show reduced suberin staining and disorganized cell layers. Metabolite analyses revealed reduction of esterified suberin components and hyperaccumulation of putative suberin precursors in the tuber periderm of RNA interference plants, suggesting that ABCG1 is required for the export of suberin components.
Publisher
American Society of Plant Biologists
Subject
/ ATP binding cassette transporters
/ ATP-Binding Cassette Transporters - analysis
/ ATP-Binding Cassette Transporters - genetics
/ ATP-Binding Cassette Transporters - metabolism
/ ATP-Binding Cassette Transporters - physiology
/ Biological Transport - genetics
/ Esters
/ Gene Expression Regulation, Plant
/ Leaves
/ Monomers
/ Oligonucleotide Array Sequence Analysis
/ Periderm
/ Plants
/ Plants, Genetically Modified - metabolism
/ potatoes
/ Solanum tuberosum - genetics
/ Solanum tuberosum - metabolism
/ suberin
/ Tubers
/ waxes
