不同耐盐能力水稻品种响应盐胁迫的差异
Differences in Response to Salt Stress of Rice Varieties with Different Salt Tolerance
程生海 1郭夏宇 2陶维旭 1冀俊超 1何爱斌 2艾治勇2
作者信息
- 1. 海南大学三亚南繁研究院,海南三亚 572000;三亚市国家耐盐碱水稻技术创新中心,海南三亚 572000
- 2. 三亚市国家耐盐碱水稻技术创新中心,海南三亚 572000;湖南杂交水稻研究中心杂交水稻全国重点实验室,湖南长沙 410125
- 折叠
摘要
为探明不同耐盐水稻品种产量形成对盐胁迫的响应,以3个耐盐品种和3个盐敏感品种为参试材料,通过两季大田试验,探究耐盐能力不同的水稻品种在3种盐胁迫处理(0.0％、0.3％和0.6％)下生长发育和产量性状差异.结果表明,耐盐水稻品种在0.3％和0.6％盐浓度胁迫下的减产率分别为38.1％～50.6％和51.2％～63.6％,明显低于盐敏感品种的47.9％～72.3％和72.9％～84.6％.同时,盐胁迫下,耐盐水稻品种在分蘖盛期和齐穗期的株高、茎蘖数和地上部干物质量降幅也明显低于盐敏感品种.进一步分析可知,与盐敏感品种相比,耐盐品种在0.6％盐浓度胁迫下具有较高的产量,齐穗期叶片还保持较高的SPAD值,成熟期叶片还保持较低的Na+含量和钠钾比.因此,良好的农艺性状和生理指标是水稻在盐胁迫下获得高产的基础.
Abstract
To investigate the yield response of different salt-tolerant rice varieties to salt stress,three salt-tolerant rice varieties and three salt-sensitive rice varieties were used as test materials.Through two seasons of field experiment,the differences in growth,development and yield traits of rice varieties with different salt-tolerant ability were studied under three salt stress treatments(0.0％,0.3％and 0.6％).The results showed that the yield reduction rates of salt-tolerant rice varieties under 0.3％and 0.6％salt stress were 38.1％～50.6％and 51.2％～63.6％,respectively,which were significantly lower than those of salt-sensitive rice varieties(47.9％～72.3％and 72.9％～84.6％).At the same time,the decrease of plant height,number of tillers and above-ground dry matter of salt-tolerant rice varieties was significantly lower than that of salt-sensitive rice varieties at the full tillering stage and full heading stage.Further analysis showed that compared with salt-sensitive varieties,salt-tolerant varieties had higher yield under 0.6％salt concentration stress,and the leaves still maintained higher SPAD value at full heading stage,and lower Na+content and sodium potassium ratio at maturity stage.Therefore,good agronomic traits and physiological indexes are the basis for rice to achieve high yield under salt stress.
关键词
耐盐水稻/盐胁迫/Na+/K+/产量Key words
salt-tolerant rice/salt stress/Na+/K+/yield引用本文复制引用
基金项目
海南省科技计划重大项目(ZDKJ202001)
出版年
2024
国家科技期刊平台
NSTL
万方数据