Evaluation of different okra genotypes for salt tolerance

Evaluation of different okra genotypes for salt tolerance

2014

E09872

An experiment was executed using twenty different Okra genotypes of unknown salt tolerance potential submitted to saline regime, with the objective to categorize them into salt tolerant, moderately tolerant and sensitive groups, on the basis of their salinity-tolerance capacity. The tested genotypes were exposed to different germination and emergence trials under a range of salinity levels i.e., 0, 2, 4, 6 and 8 dS m-1. Germination tests revealed that salt stress significantly reduced final germination percentage, germination index, energy of germination and embryo axis length. Okra seeds subjected to salt stress depicted delay in mean germination time and increased time to 50% germination. The germinated seedlings followed an attenuating pattern in terms of seedling root and shoot length and fresh and dry weight. The emergence tests of okra seeds portrayed a declining trend in emergence percentage, seedling biomass (fresh and dry) and seedling root and shoot length. On the basis of these attributes, the okra genotypes OH-713, OH-139, OH-138, OH-2324 and OH-001 were among the most tolerant group and medium tolerant group included OH-597, MD-02, OH-152. Lower medium tolerant group was formed by PMF-Beauty, PusaSwani, JKOH-456, OH-809, MF-04 whereas the sensitive genotypes included Kiran, Okra-1548, Ikra-3, Sabzpari, Okra-7100, Sitara-9101, Okra-7080. From the findings of this research trial, it can be extracted that germination and emergence tests are the significant screening tools for evaluating the okra genotypes at early growth stages under salt-stress.

4(3):23-30, INTERNATIONAL JOURNAL OF PLANT, ANIMAL AND ENVIRONMENTAL SCIENCES

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