2007
: International Polar Year
Sixty
nations participate in the International
Polar Year, placed under the aegis of the International Council
for Science and the World Weather Organization.
Studying the genetical biodiversity appears
among the topics defined at the international level. Modification of the
biodiversity is indeed a major question, especially within an area considered
today as being greatly involved in planetary balances. In this scientific
framework, the following assumption is not put forward: the possible contamination
of the local flora by Artificial Genetic Constructions obtained in laboratories
through Genetic Engineering. Such constructions are inserted by transgenesis
in plants originating from more moderate climates, and therefore are not
supposed to interfere with the Arctic flora.
However, beside corn, soya, colza and transgenic crops, there
exists today a modified version of one of the most cultivated fodder plant
in the world: the alfalfa. The Monsanto firm markets the alfalfas
J101 and J163 which are tolerant to to a weed-killer (gliphosate).
The natural population of the so-called Medicago falcata
resists cold, and grows beyond the polar circle. In spite of the distance
which separates the GM alfalfas from their polar wild form, the probability
that pollen be transported in the atmosphere is not null, as shown in
Summer 2006 measurements**.
In addition, the concept of "horizontal transfer"
between different species, mediated in particular by ground bacterias,
is often neglected in the study of gene flows* of transgenic origin. If
the pollen of any GM plant were found in the ground of an Arctic area,
its modified genetic code could be absorbed by a bacterium known as Rhizobium
, which is in symbiosis with leguminous plants such as the alfalfa. Under
certain conditions, rare but not unlikely, this bacterium could then transfer
the modified genetic code towards the plant.
* Gene
flow is the transfer of genetic material between living organisms,
either within the same species or across species boundaries (horizontal
gene transfer), via virus or micro-organisms.
** Arctic
smoke. Record high air pollution levels in the European Arctic due
to agricultural fires in Eastern Europe in spring 2006 [ pdf
file] |
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