Reuters has now updated its story to indicate that a buyout is not in the plans:
Germany's BASF SE (BASFn.DE) has no plans to buy global biotech seed company Monsanto Co (MON.N), sources with knowledge of the situation said on Tuesday.
Rumors that a buyout was imminent sent shares of Monsanto Co (MON.N) up as much as 4 percent while shares of BASF, the world's largest chemical maker, fell 2.8 percent to 62.59 euros.
Monsanto is entering a multi-year research collaboration with San Diego-based Sapphire Energy.
Sapphire specializes in genetically-engineering algae with the goal of producing drop-in replacements for fuels like gasoline, diesel and jet fuel.
The collaboration between Sapphire and Monsanto will focus on identifying genes that positively affect growth in algae and that might also increase agricultural crop yields.