...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Revista Brasileira de Engenharia Agricola e Ambiental >Salinity tolerance of halophyte Atriplex nummularia L. grown under increasing NaCl levels
【24h】

Salinity tolerance of halophyte Atriplex nummularia L. grown under increasing NaCl levels

机译：NaCl浓度增加下盐生植物滨藜植物的耐盐性

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

摘要

> size="2" face="Verdana">The current study reports effects of salt stress on growth, K+ nutrition and organic composition of Atriplex nummularia. The upper limit of the NaCl gradient imposed on the plants was close to seawater salinity (600 mM). An external NaCl of 150 mM improved the growth of this species, which corroborates its halophytic nature. Evidence show that Atriplex nummularia was responsive to NaCl, but the mechanisms of this response are still not known. In such stress condition, Na+ and Cl- accumulation in leaves was far greater than that in roots; therefore salinity tolerance of Atriplex nummularia is not due to ion exclusion mechanism. In spite of a reduction of K+ content of tissues under salinity conditions, no corresponding physiological relevance of this in terms of growth was found. The high affinity of root cells for Na+ during uptake and, probably, its subsequent sequestration into cell vacuoles and structures of protection seems to contribute to osmotic adjustment as an increase in relative water content (RWC) of leaves was observed. NaCl caused a decrease in total soluble proteins and chlorophylls; the relevance of this is discussed in terms of mechanisms of salinity tolerance. The ability of Atriplex nummularia plants to keep Na+ and Cl- away from enzymes and cytosolic structures, together with an effective osmotic adjustment, is suggested as having a role in its tolerance to high salinity.
机译：> size =“ 2” face =“ Verdana”>目前的研究报道了盐胁迫对滨藜（Aiplex nummularia）的生长，K + 营养和有机组成的影响。 。施加在植物上的NaCl梯度的上限接近海水盐度（600 mM）。 150 mM的外部NaCl改善了该物种的生长，从而证实了其盐生性。有证据表明藜芦对NaCl有反应，但这种反应的机制尚不清楚。在这种胁迫条件下，叶片中Na + 和Cl -的积累远大于根部。因此，滨藜植物的盐度耐受性不是由于离子排斥机制引起的。尽管在盐度条件下组织的K + 含量降低，但未发现其在生长方面的相应生理相关性。摄取期间，根细胞对Na + 的高度亲和力，以及随后可能被隔离到细胞液泡和保护结构中，似乎随着叶片相对含水量（RWC）的增加而有助于渗透调节。被观测到。 NaCl导致总可溶性蛋白质和叶绿素减少;盐分耐受机制讨论了这一点的相关性。建议滨藜植物具有保持Na + 和Cl -远离酶和胞质结构的能力，以及有效的渗透调节作用。在耐受高盐度方面发挥了作用。

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