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A major question in pollen tube growth in planta remains: do the pollen tube walls form a barrier to interaction with the environment? Using cryo-FESEM, we directly assessed the 3D construction and porosity of tobacco pollen tube walls. Fractured mature primary walls showed a 40-50 nm spaced lattice
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Cryofixation is widely held to be superior to chemical fixation for preserving cell structure; however, the use of cryofixation has been limited chiefly to electron microscopy. To see if cryofixation would improve sample structure or antigenicity as observed through the light microscope, we
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