Received: 03-01-2020 / Accepted: 26-05-2020
Experimentswereconducted in the Summer season of 2019 at the Experimental Station of the Faculty of Agronomy, Vietnam National University of Agriculture, to determine the effect of salicylic acid (0mM, 0.25mM and 0.50mM SA) on germination, physiology and yield of two mungbean varieties (DXVN5 and DXVN7) under salinity condition (50mM NaCl). In experiment 1, seeds of mungbean varieties were immersed in SA concentrations. After that, seeds were sown on a filter paper in the petri dish and NaCl solution was added for 7 days. In experiment 2, three-leaf plants were treated with NaCl solution for 7 days. And then, foliar spray of different SA concentrations was done. The results indicated that the germination rate was not affected by SA, but increased SA levels raised shoot and root length of seedlings, fresh weight of seedling and also increased enhancedin the plant height, leaf area, leaf relative water content, dry matter, SPAD index, yield components and individual yield in both of mungbean varieties under salt stress, while the ion leakage and proline content decreased with increasing SA concentration. At the SA level of 0.50mM showed better growth and recovery in both of varieties under salinity stress. The individual yield in of DXVN5 variety increased by 110.23% and DXVN7 variety increased by 118.77%.