Summary
Indices of salt resistance, based on the measurement of the Mean Relative Growth Rate\((\bar R)\) of the total plant biomass were shown to be more reliable and easily obtained than those based on the rooting technique.
Adaptation to salinity stress (NaCl toxicity, osmotic stress) differs essentially from heavy metal stress (mainly ion-toxicity).
Extension of the root system under saline conditions should therefore be regarded as a compensatory growth mechanism rather than the direct result of salt stimulation.
The application of the rooting technique for optimum measurement of salt resistance is questioned.
The\(\bar R\) index of salt resistance technique may be applied to all vascular plants, while unmodified application of the rooting technique is confined to certain groups of the Monocotyledonae.
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Rozema, J., Visser, M. The applicability of the rooting technique measuring salt resistance in populations ofFestuca rubra andJuncus species. Plant Soil 62, 479–485 (1981). https://doi.org/10.1007/BF02374146
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DOI: https://doi.org/10.1007/BF02374146