Marshall A T
Cell Tissue Res. 1983;231(1):215-27. doi: 10.1007/BF00215788.
X-ray microanalysis of frozen-hydrated specimens of the cicada filter chamber shows that there are concentration changes in K+ and Cl- in the various compartments of the filter chamber from feeding to non-feeding states. These changes are consistent with an osmotic transfer of water between the anterior midgut and the posterior midgut and Malpighian tubules. K+ and Cl- account for a large proportion of the osmotically active solutes in these compartments, and it is suggested that the osmotic gradients are generated by secretion of K+ and Cl- into the posterior midgut and Malpighian tubule lumina. Analysis of freeze-substituted sections of filter chamber supports the analysis of frozen-hydrated specimens and indicates that Na+ may also be secreted into the posterior midgut and the Malpighian tubules. The system functions as a water-shunting complex.
对蝉滤室的冷冻水合标本进行X射线微分析表明，从取食状态到非取食状态，滤室各部分的K⁺和Cl⁻浓度会发生变化。这些变化与水在前肠和后肠以及马氏管之间的渗透转移相一致。K⁺和Cl⁻在这些部分的渗透活性溶质中占很大比例，有人认为渗透梯度是由K⁺和Cl⁻分泌到后肠和马氏管腔中产生的。对滤室冷冻替代切片的分析支持了对冷冻水合标本的分析，并表明Na⁺也可能分泌到后肠和马氏管中。该系统起到分流复合体的作用。
