HansMustermann
Penultimate Amazing
- Joined
- Mar 2, 2009
- Messages
- 23,741
There is no evidence of that sort of gene flow. Instead roundup resistant weeds are developing/evolving in response to the heavy reliance on roundup/gylphosate.
Whatever the mechanism may be, those weeds now exist and are spreading very fast in other people's fields.
stevea; said:6800670]WRONG ! Agrobacterium transfer their bacterial DNA to plants - it's a one-way transfer. Now agrobacteria have been modified in lab to introduce selected "GMO" plasmids into plants, but that is nothing like the bogey man you are trying to invent.
I am not suggesting that horizontal gene transfer (very rare in higher plants) is not a huge looming problem associated with GMOs, but telling lies and crying wolf is not helpful.
Hate to break it to you, but they will transcribe just about any plasmid that has the right markers, and the _only_ modification that was made in the lab was inserting a specific one. Since bacteria exchange plasmids all the time, technically it can only take one bacterium with such a payload to not only multiply and spread it, but pass the plasmid around to other agrobacteria.
And it's not even necessary for it to escape from a lab. Infecting plants in the field has also been used extensively.
But really, plasmids get around. GM plasmids used in soy have been even found in the bacteria in some humans' gut. While the consensus is that they didn't get that from eating GM soy, nevertheless it's an illustration of those plasmids showing up just about everywhere, and where you expect them the least.
If you want to tell me that they show up everywhere _except_ in agrobacteria in the wild, I'm afraid that that kinda strains my suspension of disbelief.
stevea; said:Evidence !
You can get GMO gene transfer to related wild crops by cross pollinization. There are no know cases of GMO plasmids horizontal transfer "in the field", despite your repeated claims to the contrary. Thanks for the alarmist woo; it's what I expect on this forum.
Regardless of whether you believe it or not, nevertheless there are multiple studies showing those genes appearing in wild maize for example. E.g.,
http://news.bbc.co.uk/2/hi/science/nature/1680848.stm
Now while that was probably by pollination -- and in this particular case I didn't claim it was by agrobacteria, but it's irrelevant anyway -- nevertheless you have something that is a non-cultivated grass that's showing up even in remote mountains and generally places where nobody cultivated anything, killing insects and wiping out plant species that don't have the GM genes too.
stevea; said:There was concern that Bt pollen might kill friendly insects at a distance, but this appears to not be the case in practice.
Yes, because the effects of strictly polen of one plant on strictly one species, which is actually what was tested in regards to the monarch butterfly, is all that matters
stevea; said:A lot of these concerns will likely be addressed in future GMO crops where one will be unable to re-propagate from offspring seed.
Right, and you'll somehow also get rid of all those plasmids in the wild, many introduced by infecting plants in the field