PJB-2024-29
Evaluation of growth indices for salt tolerance potential in mungbean cultivars at seedling stage &
Adnan Ahmed
Abstract
Soil salinity is a significant abiotic factor that lowers crop productivity. In the sub-tropical countries of Asia, mungbean is grown as a marginal crop in rice-based cultivation techniques, where salts get deposit in the upper layer. Therefore, robust criteria are essential to screen high yielding salt-tolerant cultivars of mungbean. The current study is an effort to assess twelve mungbean genotypes for salt tolerance potential under laboratory environment at 0, 50, 75, and 100 mM NaCl using stress tolerance indices. The findings showed that in all cultivars, with the increase in level of salinity there is a significant reduction in the germination, biomass, length of root and shoot stress tolerance indices. There are strong and positive connections between the fresh and dry biomass tolerance indices of seedlings. The data was categorized into three clusters using the multivariate cluster analysis approach in order to assess the similarities between mungbean cultivars. Cluster-I exhibited salt-tolerant cultivars NM-2021, NM-98, NM-92, Abbas Mung and NM-19-19, Cluster-II classified medium-tolerant cultivars NM-121-2, NM-2021, NM-2006 and NM-2016, and Cluster-III showed salt-sensitive cultivars NM-51, NM-2011 and NM-54. The growth indicators could be utilized as selection standards to assess salt tolerance in mungbean cultivars.
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