Can plants survive in salt water?

While most plants cannot survive in salt water, there are
plants that can.

One example of a type of plant that can
survive in salt water is something called a marine seagrass.  I have attached a link
here to a page that talks in depth about this kind of
plant.

Another example of a plant that grows in salt water
is the mangrove.  Mangroves grow along the coasts of many tropical places, including the
island where I grew up.  Their roots go down into the floor of the ocean right along
shore.  The "wettropics.gov" site I have linked to gives more information about these
plants.

In general, though, plants cannot live in salt
water because they do not have genes that allow them to tolerate salt.  Mangroves and
marine seagrasses do have such genes.