• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>African Journal of Biotechnology >Physiological responses of two rice (Oryza sativa L.) genotypes to chilling stress at seedling stage
【24h】

Physiological responses of two rice (Oryza sativa L.) genotypes to chilling stress at seedling stage

机译：两种水稻基因型对苗期冷胁迫的生理响应

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, quantitative changes of dry matter, proline and total soluble protein in shoot and root, stomatal conductance (gs), total chlorophyll, chlorophyll stability index (CSI(?and soil and plant analyzer development (SPAD) number of latest fully-expanded leaves were determined in an Iranian cold-sensitive rice genotype (Hoveizeh) in comparison to an international check genotype (IRCTN34, cold-tolerant). The hydroponic experiment was arranged in a completely randomized design with three replications under the growth chamber condition under a controlled environment of 29/22°C (dayight) and 12 h light photoperiod. Then, the treatment plants were exposed to 15/10°C (dayight) cold stress for two weeks and control plants were kept at 29/22°C (dayight). Dry matter accumulation decreased with chilling stress in the two genotypes, with decreases been more pronounced in Hoveizeh genotype. Our results showed that cold treatment increased accumulation of total soluble protein (only in cold-tolerant genotype) and proline in rice seedlings, while it decreased the content of chlorophyll, stomatal conductance, total soluble protein (only in cold-sensitive genotype) and dry matter. The results indicated that higher contents of protein and chlorophyll under stress were associated with tolerance to chilling.
机译：在这项研究中，茎和根中干物质，脯氨酸和总可溶性蛋白，气孔导度（gs），总叶绿素，叶绿素稳定性指数（CSI（？）和土壤和植物分析仪发展（SPAD）数量）的定量变化与国际检查基因型（IRCTN34，耐寒性）相比，伊朗冷敏水稻基因型（Hoveizeh）确定了膨大的叶片。水培试验以完全随机的设计进行安排，在生长室条件下，三倍重复在29/22°C（日/夜）和12 h光照周期的受控环境中，然后将处理植物暴露于15/10°C（日/夜）的冷胁迫下两周，并将对照植物保持在29/29 22°C（日/夜）。两种基因型在干旱胁迫下干物质积累减少，而Hoveizeh基因型则更明显。我们的结果表明，冷处理增加了总可溶性蛋白的积累（仅n耐寒基因型和脯氨酸），但会降低叶绿素含量，气孔导度，总可溶性蛋白（仅在冷敏感基因型中）和干物质。结果表明，胁迫下较高的蛋白质和叶绿素含量与耐寒性有关。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号