Abstract
The role of sucrose cleavage in determining sink strength in potato was investigated by generating transgenic potato plants that expressed a yeast invertase in either the cytosol or apoplast of tubers. Cytosolic localization gave rise to a reduction in tuber size and an increase in tuber number per plant whereas apoplastic targeting led to an increase in tuber size and a decrease in tuber number per plant. Sink organ size can be manipulated through modification of sucrose metabolism.
MeSH terms
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Chimera / genetics
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Cytosol / enzymology
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Glycoside Hydrolases / genetics
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Glycoside Hydrolases / metabolism*
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Plants, Genetically Modified / cytology
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Plants, Genetically Modified / genetics
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Plants, Genetically Modified / growth & development
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Saccharomyces cerevisiae / enzymology*
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Solanum tuberosum / cytology
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Solanum tuberosum / genetics
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Solanum tuberosum / growth & development*
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Sucrose / metabolism
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beta-Fructofuranosidase
Substances
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Sucrose
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Glycoside Hydrolases
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beta-Fructofuranosidase