The salinity stress may affect the plant growth in various ways. Indirectly by reduced water uptake and from the water uptake a direct waters stress on the photosynthesis. However a direct impact by salinity stress can also be simulated by impact on either lowering of photsynthesis or on the enhancing the plant respiration. The later options available from setting the Salinity stress switch to on respiration was not in operation in previous versions.
This is now corrected after the identification of the problem by Jingbo Zhen. Thanks to his efforts this bug is now removed.