Effect of different saline regimes on germination and seedling growth of mungbean (Vigna radiata L.)

An experiment was conducted in the laboratory of Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Cumilla during the period from August 2019 to October 2019 to investigate the effect of salt stress on the germination and seedling growth of eight mungbean genotypes. The treatments were salt levels of 0 (control), 8, 12, and 16 dS m-1 and the mungbean genotypes were BARI Mung-7, BARI Mung-8, BM´K1-11004-3, MMA-T-V07, BM´K1-112009, BM´K1-112002, SM-2-134 and MM-L1-V12. The experiment was laid out in a completely randomized design (CRD) with three replicates. The results indicated that salinity affected seed germination and seedling growth significantly, and among the salinity treatments only 8 dS m-1 salt stress-imposed seeds were germinated and survived for few days. On the other hand, the radicle and plumule were damaged to all the genotypes after germination when applied the salt by 12 and 16 dS m-1 . Germination percentage, relative water content, seedling vigor index and salt tolerant index were significantly influenced by imposition of salt stress in all genotypes. However, among the genotypes studied, MM-L1-V12 performed better and BARI Mung-8 showed highest sensitivity to salt stress. Key words: Saline regimes, germination, seedling growth, mungbean.

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