The concept is creating a genetically modified organism, or GMO. This specifically would be done to try to water plants salt water and they could still grow. This is a pro in an area with little to no freshwater available, such as extreme drought. The cons of this is it would kill any other non salt water tolerant plant. Salt building up in the soil would make it so no other plant could grow there in the future, unless it was also made into a gmo. Overall this is not a feasible solution for most areas and most crops.
