...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >The effect of pulsed versus gradual salinity reduction on the physiology and survival of Halophila johnsonii Eiseman
【24h】

The effect of pulsed versus gradual salinity reduction on the physiology and survival of Halophila johnsonii Eiseman

机译：脉冲盐度与逐渐降低盐度对约翰逊嗜盐菌生理和存活的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Plants of Halophila johnsonii Eiseman were exposed, in mesocosms, to either pulsed hyposalinity treatments of 30, 15, 10, and 8 or gradual salinity reductions of two every 2 days. When salinity was pulsed, survivorship (>80 %) and maximum quantum yields (>0.7) were high in the 30 and 15 salinity treatments, but both declined in the 10 and 8 salinity treatments. Leaf osmo-lality declined with respect to salinity treatment, but the difference between leaf and media osmolality remained relatively constant (675 ± 177 mmol kg~(-1)). In contrast, when salinity was gradually reduced, survivorship remained high from salinities of 30 to 4, and maximum quantum yields remained high from salinities of 30 to 6. Leaf osmolality declined linearly with respect to media osmolality and, similar to the pulsed treatments, the difference between leaf and media osmolality remained relatively constant from salinities of 30 to 2 (638 ±161 mmol kg~(-1)). Trolox equivalent antioxidant capacity declined over time in both pulsed and gradual salinity reduction. The results indicate that H. johnsonii is more tolerant of hyposalinity than has previously been reported and that gradually reducing salinity extended its low-salinity tolerance threshold by approximately a salinity of 10.
机译：约翰逊氏嗜盐菌的植物在中膜中暴露于30、15、10和8的脉冲低盐度处理或每2天逐渐降低2的盐度。当脉冲盐度时，在30和15种盐度处理中存活率（> 80％）和最大量子产率（> 0.7）高，但是在10和8种盐度处理中两者均下降。盐度处理使叶片的渗透压下降，但叶片和培养基的渗透压之间的差异保持相对恒定（675±177 mmol kg〜（-1））。相反，当盐度逐渐降低时，从30到4的盐度，存活率仍然很高；从30到6的盐度，最大量子产率仍然很高。叶片的重量克分子渗透压浓度与培养基的重量克分子渗透压浓度线性下降，并且与脉冲处理相似，盐度为30至2（638±161 mmol kg〜（-1））时，叶片与介质的重量克分子渗透压浓度之间的差异保持相对恒定。 Trolox等效抗氧化剂能力在脉冲和逐渐降低盐度中均随时间下降。结果表明，约翰逊氏菌对低盐度的耐受性比以前报道的要好，逐渐降低盐度可将其低盐度耐受性阈值提高约10盐度。

著录项

  • 来源
    《Marine biology》 |2012年第7期|1439-1447|共9页
  • 作者

    Nina E. Griffin; Michael J. Durako;

  • 作者单位

    Department of Biology and Marine Biology, Center for Marine Science, University of North Carolina Wilmington, 5600 Marvin Moss Lane, Wilmington, NC 28409, USA;

    Department of Biology and Marine Biology, Center for Marine Science, University of North Carolina Wilmington, 5600 Marvin Moss Lane, Wilmington, NC 28409, USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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