RESULTS: The three species exhibited distinct responses upon wetting: H. fauriei\'s exostome closed inwards, P. levieri\' opened outwards, and R. declinatus\' elongated significantly. These differences are attributed to the varying microfibril deposition in the exostome layers. Uniform deposition in the inner layer and minimal deposition in the outer layer enabled exostome opening upon wetting and closing when dry. Our findings suggest that the diastole and contraction of fine microfibrils in the exostome plates and ridges are the key drivers of hygroscopic movement.
CONCLUSIONS: This study provides further evidence at both the structural and submicroscopic levels, contributing to the unraveling of the hygroscopic movement mechanism in Diplolepideae peristomes. This enhanced understanding sheds light on the relationship between peristome structure and function.
结果:这三个物种在润湿时表现出不同的反应:福里氏H.P.levieri\'向外打开,和R.declinatus\'明显拉长。这些差异归因于外植体层中不同的微纤丝沉积。内层中的均匀沉积和外层中的最小沉积使得能够在润湿时打开并且在干燥时闭合。我们的发现表明,外植体板和脊中细小微原纤维的舒张和收缩是吸湿性运动的关键驱动因素。
结论:这项研究在结构和亚微观水平上提供了进一步的证据,有助于揭示Diplolepideae的吸湿运动机制。这种增强的理解揭示了perstome结构与功能之间的关系。