...
  • 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 >MICROTUBULE AND ACTIN FILAMENT ORGANIZATION DURING STOMATAL MORPHOGENESIS IN THE FERN ASPLENIUM NIDUS .1. GUARD CELL MOTHER CELL
【24h】

MICROTUBULE AND ACTIN FILAMENT ORGANIZATION DURING STOMATAL MORPHOGENESIS IN THE FERN ASPLENIUM NIDUS .1. GUARD CELL MOTHER CELL

机译：蕨类植物脾气孔形成过程中的微管和肌动蛋白丝组织1。守护细胞母细胞

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 newly-formed guard cell mother cells (GMCs) of Asplenium nidus are small, lens-shaped and are formed by one or two asymmetrical divisions. Their growth axis is parallel to the plane of their future division, a process during which the internal periclinal wall (IPW) is detached from the partner wall of the underlying cell(s). This oriented GMC expansion occurs transversely to a microfibril bundle, which is deposited externally to a U-like microtubule (Mt) bundle and a co-localized actin filament (Af) bundle. They line the IPW and the major part of the anticlinal walls. The deposition of the microfibril bundle is followed by the slight constriction of the internal part of the GMCs and the broadening of the substomatal cavity. The IPW forms a distinct bulging distal to the neighbouring leaf margin, as well as a less defined proximal one. During the IPW bulging, the Mts and Afs under the external periclinal wall (EPW) attain a radial organization. This is followed by thinning of the central EPW region, which becomes impregnated with a callose-like glucan. The rest of the EPW becomes unequally thickened. The disintegration of the U-like Mt bundle is succeeded by the organization of radial Mt and Af arrays under the IPW. The radial Mt systems, controlling the alignment of the newly-deposited microfibrils, allow the GMC to assume a round paradermal profile. The GMCs form a preprophase Mt band (PPB) perpendicular to the interphase U-like Mt bundle. The anticlinal PPB portions appear first and those lining the periclinal walls later. The cytoplasm adjacent to the latter walls retain the radial Mt systems during early preprophase, simultaneously with the anticlinal PPB portions. The observations suggest that the GMCs of the fern A. nidus obtain a unique form, as a result of a particular polarity established in the cortical cytoplasm of the periclinal walls, in which Mts and Afs appear involved. This polarity persists in cell division and is ''inherited'' to guard cells (GCs). It provides primary morphogenetic information not only to GMCs but also to GCs. [References: 38]
机译：新形成的天竺葵的保卫细胞母细胞（GMC）很小，呈透镜状，由一个或两个不对称的部分组成。它们的生长轴平行于其未来分裂的平面，在此过程中，内周壁（IPW）与下面细胞的伙伴壁分离。这种定向的GMC扩展发生在微纤维束的横向，而微纤维束沉积在U型微管（Mt）束和共定位肌动蛋白丝（Af）束的外部。它们排列在IPW和背斜壁的主要部分上。微纤维束的沉积随后是GMC内部的轻微收缩和气孔下腔的扩大。 IPW在邻近的叶缘的远端形成一个明显的凸起，而在近端的叶则不那么明显。在IPW隆起期间，外周壁（EPW）下的Mts和Afs呈放射状。这之后是中央EPW区域的变薄，该区域被愈伤组织样葡聚糖浸渍。 EPW的其余部分变得不均匀地加厚。通过在IPW下组织放射状的Mt和Af阵列，成功地完成了U型Mt束的解体。径向Mt系统控制着新沉积的微纤维的排列，使GMC呈现出圆形的皮下轮廓。 GMC形成垂直于相间U形Mt束的前相Mt带（PPB）。背斜PPB部分首先出现，然后在周缘壁衬里。与后壁相邻的细胞质在早期前期过程中保留了放射状的Mt系统，同时还保留了背斜PPB部分。观察结果表明，由于在周缘壁的皮质细胞质中建立了特定的极性，其中Mts和Afs参与其中，因此A.nidus的GMC获得了独特的形式。这种极性在细胞分裂中持续存在，并被“继承”以保护细胞（GC）。它不仅为GMC提供了主要的形态发生信息，还为GC提供了主要的形态学信息。 [参考：38]

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