No. Sodium is salt and it will kill a plant.
No, plants do not need sodium to grow. They need protein to grow.
Yes, high pressure sodium lights will help to grow plants indoors. You can grow tomatos and other plants that need normally need sunlight.
grow bean plants with and without sodium
it kills the plant
yes they do need sodium
it is not possible
A small quantity is essential for plants specially desert plants but excess of salt is harmful
yes because of plasmolysis.
Click on the link below, under 'Related links' for the sodium content of some vegetables.
Different species of plants have different levels of toleration for sodium. There are even some plants which grow happily in the very salty ocean (algae, seaweed).
Generally plants (with the exception of halophiles) doesn't accept a high concentration of sodium chloride in soils.
the sun doesn't need plants, plants need the sun.