Global patent index - EP 1009839 A1

EP 1009839 A1 2000-06-21 - 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

EP 1009839 A1 (EN)

Application

EP 98901894 A

Priority

  • CA 9800055 W
  • US 3694697 P
  • US 86878697 A

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 (main, further and additional classification)

C12N 15/82; A01H 5/00

IPC 8 full level (invention and additional information)

A01H 5/00 (2006.01); C12N 9/10 (2006.01); C12N 15/09 (2006.01); C12N 15/82 (2006.01)

CPC (invention and additional information)

C12N 9/1051 (2013.01); C12N 15/8245 (2013.01)

Citation (search report)

See references of WO 9835051A1

Designated contracting state (EPC)

BE CH DE ES FI FR GB LI NL SE

EPO simple patent family

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 0000542 A2 20000628; HU 0000542 A3 20020228; JP 2001511007 A 20010807; NZ 336766 A 20000825; PL 334962 A1 20000327

INPADOC legal status

2004-03-03 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030902

2000-06-21 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990910

2000-06-21 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): BE CH DE ES FI FR GB LI NL SE