| Autor: |
SANDESH, G. M., DEEPAK, C. A., RAJANNA, M. P. |
| Předmět: |
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| Zdroj: |
Mysore Journal of Agricultural Sciences; Apr-Jun2022, Vol. 56 Issue 2, p325-338, 14p |
| Abstrakt: |
Salinity is one of the most serious problems in rice cultivation. Salinity affects all growth stages of rice to varying degrees starting from germination up to maturation. The present study was conducted to evaluate the tolerance of 22 rice genotypes to salinity at both seed germination and seedling stages. The genotypes were evaluated for germination percentage and root and shoot growth at germination stage by soaking seeds in varying concentrations of NaCl solution and for 9 and 12 days in petri dishes. Under salt stressed conditions, the genotypes CSR-23, CSR-36, KMP-220 and FL-478 recorded higher germination percentage. These four rice genotypes that had better germination rate were also found to be moderately tolerant to salt stress at seedling growth stage. While salt stress had greater adverse effect on root growth at germination stage, the shoot growth was drastically affected at seedling stage. Further, majority of the genotypes under the present study were found to have high reduction in root to shoot ratio under salt stress. While the root to shoot ratio of MAS-26 and CSR-23 was not affected, the same was found to be increased in Bevu Bella and FL-478 under salt stress situation. Present study revealed significant variation between genotypes for all the traits under salt stress situations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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