Salinity tolerance of japonica and indica rice (Oryza sativa L.) at the seedling stage
Salinity tolerance of japonica and indica rice (Oryza sativa L.) at the seedling stage
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DOI：
10.1007/s00425-002-0958-3
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发表时间：
2003-04-01
期刊：
影响因子：
4.3
通讯作者：
Gregorio, GB
中科院分区：
文献类型：
--
作者：
Lee, KS;Choi, WY;Gregorio, GB
为了鉴定籼、粳稻群体的耐盐性，对10个水稻品种在盐和非盐条件下进行了耐盐性试验。将10天龄的幼苗在正常培养液中生长，然后最初在6 dS/m的电导率（EC）下盐渍4天，最后在12 dS/m的EC下盐渍接下来的14天。通过测定植株的生长参数和地上部对Na、K的吸收量来表征两组水稻的耐盐水平。耐盐品种的所有生长参数的减少在籼稻品种中显着低于粳稻品种。耐籼稻品种是很好的钠排斥剂，吸收大量的K，并保持低Na/K比的拍摄。耐粳稻品种也吸收较少的钠，但不作为良好的排斥籼稻品种。芽钾浓度单独没有表现出任何关系，耐盐性。这些结果表明，在所测定的所有参数中，籼稻的耐性水平高于粳稻。
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.