In these genetically modified potatoes the guard cell density is
altered. This influences the gas exchange and water consumption of
the plants and hence their growth under given weather
The modified potato plants were selected using the nptII-gene
product NPT or the hph-gene product hygromycin phosphotransferase.
Hence the plants must be considered to be resistant against
antibiotics like neomycin, kanamycin or hygromycin.
The genetically modified potatoes harvested in the field trials are
not intended for use in the production of foodstuffs or animal
feed. Within the scope of the proposed release the alteration of
the gas exchange and/or water consumption of the genetically
modified potato plants is not expected to pose any threat to human
or animal health, or to the environment. No new proteins will be
generated in the plant as a consequence of the genetic
In Europe the establishment of potatoes in natural ecosystems has
not been observed, since potatoes compete poorly against wild
plants and they are not frost resistant. From time to time potato
plants are found beyond the cultivated areas, but only on
non-natural sites such as verges and other ruderal areas. Owing to
the lack of frost hardiness the cultivated potato does not
establish in these areas either.
Potato plants can blossom and bear fruit. However, under Central
European climate conditions there is little likelihood that potato
seeds will overwinter and produce plants.
Attempts to cross-breed potatoes with solanaceous plants found in
Central Europe were not successful. In agricultural practice,
potatoes are propagated vegetatively via tubers. The pollen of the
potato plant can be transferred by insects or by wind. However,
wind dispersal only takes place over short distances. Pollen
transfer, therefore, would have no effect on the results of
The mode of action of the inserted genes and of its products is not
expected to have a negative impact on human or animal health, or on
Provisions to be adopted during the course of and after finishing
the field trial will limit the possibility of interaction with
other plant species and crops.
The genetically modified potatoes referred to in the proposed field
trial are not intended for use in foodstuffs or animal feed.
The field trial aims at validating the expected effect of the
genetic modificaion under field conditions.
Field trial, not for human consumption or for feed purposes
An English summary of the notification including the risk
assessment of the notifier is available at the EU WebSNIF
internet-page of Joint Research Centre under notification number
B/DE/04/159 (see below)