Modification of plant metabolism

• US 5,387,756 A
• Filed: 12/16/1992
• Issued: 02/07/1995
• Est. Priority Date: 12/21/1989
• Status: Expired due to Term

• Current Assignee: Keith S. Blundy, Michael M. Burrell
• Original Assignee: Keith S. Blundy, Michael M. Burrell
• Inventors: Burrell, Michael M., Blundy, Keith S.
• Primary Examiner(s): Fox, David T.
• Application Number:
  US07/991,451
• Time in Patent Office: 783 Days
• Field of Search: 435/69.1, 435/70.1, 435/172.3, 435/183, 435/240.4, 435/320.1, 435/194, 800/205, 800/250, 800/255, 800/DIG. 42, 536/23.2, 536/23.6, 536/23.7
• US Class Current: 800/317.2
• CPC Class Codes: C12N 15/8245 involving modified carbohydrate or sugar alcohol metabolism, e.g. starch biosynthesis
• CPC Class Codes: C12N 9/12 transferring phosphorus containing groups, e.g. kinases (2.7)
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices

Abstract

A transgenic plant is prepared by a method in which a plant cell is transformed with a chimaeric gene comprising a promoter and a gene encoding a polypeptide which displays the activity of an enzyme which regulates the amount of a metabolic intermediate in glycolysis or in a pathway for the synthesis or degradation of starch, sucrose or reducing sugar from a glycotyltic intermediate.

In stored potatoes the subject of the invention an increased level of phosphofructokinase results in reduced accumulations of sugars in the tubers.

Claims

1. A transgenic potato plant which harbors in its cells a chimaeric gene, which comprises;

(a) a promoter operably linked to

(b) a deoxgrihonucleic acid coding sequence which encodes phosphofructokinase, said gene being capable of expression in the cells of the transgenic potato plant.