EP 1009839 A1 20000621 - TRANSGENIC POTATOES HAVING REDUCED LEVELS OF ALPHA GLUCAN L- OR H-TYPE TUBER PHOSPHORYLASE ACTIVITY WITH REDUCED COLD-SWEETENING
Title (en)
TRANSGENIC POTATOES HAVING REDUCED LEVELS OF ALPHA GLUCAN L- OR H-TYPE TUBER PHOSPHORYLASE ACTIVITY WITH REDUCED COLD-SWEETENING
Title (de)
TRANSGENE KARTOFFELN MIT REDUZIERTER ALPHA GLUCAN L- ODER H-TYP KNOLLEN PHOSPHORTYLASE AKTIVITÄT MIT REDUZIERTEM "COLD-SWEETENING"
Title (fr)
POMMES DE TERRE TRANSGENIQUES AVEC REDUCTION DES NIVEAUX D'ACTIVITE DE LA TUBERCULE-PHOSPHORYLASE DE TYPE L OU H ALPHA-GLUCAN ET AVEC REDUCTION DE L'ADOUCISSEMENT AU FROID
Publication
Application
Priority
- CA 9800055 W 19980205
- US 3694697 P 19970210
- US 86878697 A 19970604
Abstract (en)
[origin: WO9835051A1] Potato plants which exhibit reduced levels of alpha glucan L-type tuber phosphorylase (GLTP) or alpha glucan H-type tuber phosphorylase (GHTP) enzyme activity within the potato tuber are provided. The conversion of starches to sugars in potato tubers, particularly when stored at temperatures below 7 DEG C, is reduced in tubers exhibiting reduced GLTP or GHTP enzyme activity. Reducing cold-sweetening in potatoes allows for potato storage at cooler temperatures, resulting in prolonged dormancy, reduced incidence of disease, and increased storage life. Methods for producing potato plants which produce tubers exhibiting reduced GLTP or GHTP enzyme activity are also provided. Reduction of GLTP or GHTP activity within the potato tuber may be accomplished by such techniques as suppression of gene expression using homologous antisense RNA, the use of co-suppression, regulatory silencing sequences, chemical and protein inhibitors, or the use of site-directed mutagenesis or the isolation of alternative alleles to obtain GLTP or GHTP variants with reduced starch affinity or activity.
IPC 1-7
IPC 8 full level
C12N 9/10 (2006.01); C12N 15/09 (2006.01); C12N 15/82 (2006.01); A01H 5/00 (2006.01)
CPC (source: EP)
C12N 9/1051 (2013.01); C12N 15/8245 (2013.01)
Designated contracting state (EPC)
BE CH DE ES FI FR GB LI NL SE
DOCDB simple family (publication)
WO 9835051 A1 19980813; AR 011121 A1 20000802; AU 5849398 A 19980826; AU 724942 B2 20001005; BR 9807214 A 20000425; CA 2275885 A1 19980813; CA 2275885 C 20070109; CN 1113143 C 20030702; CN 1246894 A 20000308; CN 1300338 A 20010620; EP 1009839 A1 20000621; HU P0000542 A2 20000628; HU P0000542 A3 20020228; JP 2001511007 A 20010807; NZ 336766 A 20000825; PL 334962 A1 20000327
DOCDB simple family (application)
CA 9800055 W 19980205; AR P980100562 A 19980209; AU 5849398 A 19980205; BR 9807214 A 19980205; CA 2275885 A 19980205; CN 98802413 A 19980205; CN 99802413 A 19990519; EP 98901894 A 19980205; HU P0000542 A 19980205; JP 53344998 A 19980205; NZ 33676698 A 19980205; PL 33496298 A 19980205