A member of the TERMINAL FLOWER 1/CENTRORADIALIS gene family controls sprout growth in potato tubers

Potato tuber bud dormancy break followed by premature sprouting is a major commercial problem which results in quality losses and decreased tuber marketability. An approach to controlling premature tuber sprouting is to develop potato cultivars with a longer dormancy period and/or reduced rate of sp...

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Bibliographic Details
Published in:Journal of experimental botany 2019-02, Vol.70 (3), p.835-843
Main Authors: Morris, Wayne L., Alamar, M. Carmen, Lopez-Cobollo, Rosa M., Castillo, Javier Cañete, Bennett, Mark, Van der Kaay, Jeroen, Stevens, Jennifer, Sharma, Sanjeev Kumar, McLean, Karen, Thompson, Andrew J., Terry, Leon A., Turnbull, Colin G.N., Bryan, Glenn J., Taylor, Mark A.
Format: Article
Language:English
Subjects:
abscisic acid
apical meristems
chromosomes
Crop Molecular Genetics
cultivars
cytokinins
diploidy
dormancy
flowers
genes
Genes, Plant
genetically modified organisms
genotype
Multigene Family
Plant Proteins - genetics
Plant Proteins - metabolism
Plant Tubers - genetics
Plant Tubers - growth & development
potatoes
Quantitative Trait Loci
Research Papers
Solanum tuberosum
Solanum tuberosum - genetics
Solanum tuberosum - growth & development
tetraploidy
tuber sprouting
tubers
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Summary:Potato tuber bud dormancy break followed by premature sprouting is a major commercial problem which results in quality losses and decreased tuber marketability. An approach to controlling premature tuber sprouting is to develop potato cultivars with a longer dormancy period and/or reduced rate of sprout growth. Our recent studies using a potato diploid population have identified several quantitative trait loci (QTLs) that are associated with tuber sprout growth. In the current study, we aim to characterize a candidate gene associated with one of the largest effect QTLs for rapid tuber sprout growth on potato chromosome 3. Underlying this QTL is a gene encoding a TERMINAL FLOWER 1/CENTRORADIALIS homologue (PGSC0003DMG400014322). Here, we use a transgenic approach to manipulate the expression level of the CEN family member in a potato tetraploid genotype (cv. Désirée). We demonstrate a clear effect of manipulation of StCEN expression, with decreased expression levels associated with an increased rate of sprout growth, and overexpressing lines showing a lower rate of sprout growth than controls. Associated with different levels of StCEN expression were different levels of abscisic acid and cytokinins, implying a role in controlling the levels of plant growth regulators in the apical meristem.
ISSN:0022-0957
1460-2431
1460-2431
DOI:10.1093/jxb/ery387