Summary
Cuticle and pore development in the guard cells ofFunaria were investigated with the electron microscope. Pore cuticle formation is simultaneous with the creation of the pore itself. The morphology of the pore cuticle is unlike that of any cuticle described in the literature. It has many lamellae which are penetrated by electron dense fibrils. Three different cuticular morphologies exist from the pore to the subsidiary cell walls. The cuticles on the pore and outer walls contain fibrils that sometimes reach to the surface. The subsidiary cell cuticle lacks fibrils altogether. It is hypothesized that (1) cuticularization of the middle lamella contributes to ventral wall separation and (2) differences in extent of cuticular fibrils are related to greater water loss from stomata than from subsidiary cells (peristomatal transpiration).
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This work represents part of a doctoral thesis submitted by FDS to the Section of Plant Biology at Cornell.
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Sack, F.D., Paolillo, D.J. Stomatal pore and cuticle formation inFunaria . Protoplasma 116, 1–13 (1983). https://doi.org/10.1007/BF01294225
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DOI: https://doi.org/10.1007/BF01294225