Global Patent Index - EP 0998199 A1

EP 0998199 A1 2000-05-10 - METHOD FOR IMPROVING THE FREEZING TOLERANCE OF PLANTS

Title (en)

METHOD FOR IMPROVING THE FREEZING TOLERANCE OF PLANTS

Title (de)

VERFAHREN ZUR VERBESSERUNG DER FROSTTOLERANZ VON PFLANZEN

Title (fr)

PROCEDE POUR AMELIORER LA TOLERANCE DES PLANTES AU GEL

Publication

EP 0998199 A1 (EN)

Application

EP 98931854 A

Priority

  • CA 9800648 W
  • CA 2209591 A

Abstract (en)

[origin: WO9901032A1] The accumulation of the osmolyte glycine-betaine is associated with increased freezing tolerance (FT) in wheat. An exogenous application of betaine at room temperature increased their FT by more than 5 DEG C. The treated plants showed some of the characteristics of cold-acclimated plants and expressed the low temperature responsive gene Wcor410 encoding a major membrane associated protein. The combined exposure to low temperature and betaine resulted in a cumulative effect on the improvement of FT surpassing the genetic potential of the plant to withstand freezing. This important finding indicates that an exogenous application of betaine before a predicted frost may be exploited to substantially improve cold or freezing tolerance in sensitive plants. Also disclosed is a method of reducing the growth rate of a plant by at least 30 %, which comprises the step of treating the plant with an effective dosage regimen of betaine or derivative thereof which is not lethal, preferably non-toxic to the plant. When growing the spring wheat variety Glenlea, in the presence of 500 mM of glycine betaine for four days, the growth rate thereof was reduced by about 75 %. Another aspect of the present invention is a method of inhibiting the growth of a plant, which comprises the step of treating said plant with a high dose regimen or betaine or derivative thereof. At lethal doses, this method results in killing undesirable plants. Another aspect of the present invention is a method of improving the germination rate of plant seeds at a temperature which is higher than about 0 DEG C but not lower than the coldest temperature that the plant seeds can withstand, which comprises the steps of administering to the seeds an effective dosage regimen of betaine or derivative thereof, and allowing the same to germinate at cold temperatures.

IPC 1-7 (main, further and additional classification)

A01N 37/44

IPC 8 full level (invention and additional information)

A01N 37/44 (2006.01)

CPC (invention and additional information)

A01N 37/44 (2013.01)

Citation (search report)

See references of WO 9901032A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9901032 A1 19990114; AU 8202098 A 19990125; CA 2209591 A1 19990103; CN 1275051 A 20001129; EP 0998199 A1 20000510

INPADOC legal status


2006-04-12 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20051007

2002-05-15 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20020327

2000-05-10 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000203

2000-05-10 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE