De-toxification of sodium in seed germination of Mung bean, Vigna radiata by application of Salicylic acid, Ascorbic acid, and Zinc sulfate

Detoxification of Na+ in terms of germination percentage of mung bean seeds by successive application of salicylic acid, ascorbic acid or zinc sulfate (pre-, post-, or simultaneous application) against the toxic level of NaCl has been carried out in this work. The results revealed that the best case represented by a maximum % of germination when ZnSO4 was supplied protectively i.e. when seeds were pre-treated with ZnSO4 before its exposure to salt stress (NaCl). The germination percentage was 89.3% compared to 84% (as therapeutic way) and 78% (as simultaneous application) of ZnSO4, respectively. Subsequently, the protective approach confirms the same goal (highest germination %) with other substances such as ASA (88%) and SA (86.6%). By contrast with the therapeutic approach, ZnSO4 develops a high response in terms of germination (84%) than ASA (80%) and SA (82.6%). As a conclusion, Zn-salt (Zn as ZnSO4) has a recognizable role in Na-detoxification through different mechanisms on the morphological, physiological, and biochemical levels.