AI Article Synopsis
- A study was conducted to compare salinity tolerance in indica and japonica rice varieties by testing 10 different types under saline and non-saline conditions.
- Seedlings were subjected to increasing salinity levels, and their growth and nutrient absorption (specifically Na and K) were measured to assess tolerance.
- Results showed that indica varieties were better at coping with salinity, exhibiting lower growth reduction and more effective sodium exclusion compared to japonica varieties, which were less efficient in their salt management.
Article Abstract
In order to identify the degree of salinity tolerance of the indica and japonica rice groups, 10 varieties were tested under saline and non-saline conditions. Twelve-day-old seedlings were grown in normal culture solution, then initially salinized at an electrical conductivity (EC) of 6 dS/m for 4 days, and finally salinized at an EC of 12 dS/m for the next 14 days. The growth parameters, and Na and K absorption in the shoot were measured to characterize the tolerance level of the two rice groups. Reduction in all growth parameters of tolerant varieties was significantly lower in indica varieties than in japonica varieties. Tolerant indica varieties were good Na excluders, absorbed high amounts of K, and maintained a low Na/K ratio in the shoot. Tolerant japonica varieties also absorbed less Na but were not as good excluders as indica varieties. Shoot K concentration alone did not show any relationship to salinity tolerance. These results indicate that, for all parameters measured, the tolerance level of indica was higher than that of japonica.
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| http://dx.doi.org/10.1007/s00425-002-0958-3 | DOI Listing |
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