用磁共振测速技术测量Core-chara细胞质流动
Measurement of Cytoplasmic Streaming in Chara Corallina by Magnetic Resonance Velocimetry
摘要：
在水生植物中，如轮藻，驱动胞质循环的力产生位于细胞质内，但在整个液泡中产生流体流动。为了实现这一点，液泡膜必须有效地传递流体动力学剪切。在这里，使用磁共振测速仪，我们提出了第一个全细胞测量的横截面纵向速度场轮藻corpina和表明，它是在定量协议与最近的理论分析的旋转细胞质流驱动的双向螺旋强迫在细胞质中，直接剪切传输的液泡膜。
英文摘要：
In aquatic plants such as the Characean algae, the force generation that drives cyclosis is localized within the cytoplasm, yet produces fluid flows throughout the vacuole. For this to occur the tonoplast must transmit hydrodynamic shear efficiently. Here, using magnetic resonance velocimetry, we present the first whole-cell measurements of the cross-sectional longitudinal velocity field in Chara corallina and show that it is in quantitative agreement with a recent theoretical analysis of rotational cytoplasmic streaming driven by bidirectional helical forcing in the cytoplasm, with direct shear transmission by the tonoplast.
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