There are plants which accumulate Na+. The Central Salt & Marine Chemicals Research Institute works on some such plants. I am not sure what desolving or converting media are. Salt tolerance does not necessarily mean genetically modified. There are many traditional crop varieties that are very salt tolernat - including the Pokkali cultivar of rice that we studied in the paper. What we showed is that some salt sensitive (and high yielding) varieties also have the ability to mount defenses against salinity if challenged to do so. The issue now is to find out ways of eliciting those responses when needed. Behaviour of salt tolerant varieties in salt-free soil. That is a good point. The way we think of this is that Pokkali (whihc is salt tolerant) has its defenses turned ON all the time. This is useful for Pokkali as it is grown in coastal regions and often gets inundated with sea water. The inland varieties are capable of the same defenses but turn them on only when forced to do so. The difference could well be in terms of yield as it costs energy to mount these defenses.