Ectopic expression of a tobacco invertase inhibitor homolog prevents cold-induced sweetening of potato tubers.

Greiner, S; Rausch, T; Sonnewald, U; Herbers, K · Nat Biotechnol · 1999

basic_science · Level V

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Abstract

We have transformed potato with Nt-inhh cDNA, encoding a putative vacuolar homolog of a tobacco cell wall invertase inhibitor, under the control of the CaMV 35S promoter. In transgenic tubers, cold-induced hexose accumulation was reduced by up to 75%, without any effect on potato tuber yield. Processing quality of tubers was greatly improved without changing starch quantity or quality, an important prerequisite for the biotechnological use of Nt-inhh for potato transformation.

Medical subject headings