...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Ultrastructure of Aeluropus littoralis leaf salt glands under NaCl stress
【24h】

Ultrastructure of Aeluropus littoralis leaf salt glands under NaCl stress

机译：NaCl胁迫下东北鹅叶片盐腺的超微结构。

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

The effects of salt uptake on the morphology and ultrastructure of leaf salt glands were investigated in Aeluropus littoralis plants grown for two months in the presence of 400 mM NaCl. The salt gland is composed of two linked cells, as observed in some other studied Poaceae species. The cap cell, which protrudes from the leaf surface, is smaller than the basal cell, which is embedded in the leaf mesophyll tissues and bears the former. The cuticle over the cap cell is frequently separated from the cell wall to form a cavity where salts accumulate prior to excretion. The basal cell cytoplasm contains an extensive intricate or partitioning membrane system that is probably involved in the excretion process, which is absent from the cap cell. The intricate membrane system seems to be elongated and heavily loaded with salt. The presence of 400 mM NaCl induced the disappearance of the collecting chamber over the glands and an increase in the number of vacuoles and their size in both gland cells. In the basal cell, salt greatly increased both the density and size of the intricate membrane system. The electron density of both gland cells observed under salt treatment reflects a high activity. All these changes probably constitute special adaptations for dealing with salt accumulation in the leaves. Despite the high salt concentration used, no serious damage occurred in A. littoralis salt gland ultrastructure, which consolidates the assumption that they are naturally designated for this purpose.
机译：研究了在400 mM NaCl存在下生长两个月的非洲鸢尾（Aeluropus littoralis）植物中盐吸收对叶盐腺形态和超微结构的影响。盐腺由两个相连的细胞组成，正如在其他一些禾本科物种中所观察到的那样。从叶表面突出的帽细胞比包埋在叶片叶肉组织中并具有前者的基底细胞小。顶盖细胞上的角质层经常与细胞壁分离，形成一个腔，在排泄盐之前，盐会在此积聚。基底细胞的细胞质包含广泛的复杂膜系统或分隔膜系统，这可能与排泄过程有关，而帽细胞则不存在。复杂的膜系统似乎拉长了，并充满了盐分。 400 mM NaCl的存在会导致腺体上方收集腔的消失，并且两个腺体细胞中液泡的数量及其大小都会增加。在基底细胞中，盐大大增加了复杂膜系统的密度和大小。在盐处理下观察到的两个腺细胞的电子密度反映出高活性。所有这些变化可能构成了应对叶片中盐分累积的特殊适应措施。尽管使用了较高的盐浓度，但滨海曲霉的盐腺超微结构并未发生严重损坏，这巩固了人们自然将其指定用于此目的的假设。

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