Hinako Matsuda
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Programmed cell death (PCD) in lateral root caps (LRC) is crucial for maintaining root cap functionality. Endoplasmic reticulum (ER) bodies play important roles in plant immunity and PCD. However, the distribution of ER bodies and their communication with vacuoles in the LRC remains elusive. Toyooka et al. now provide insight into the organization of ER bodies in <i>Arabidopsis</i> LRC cells and on the transportation mechanism of β-glucosidases from ER bodies to vacuoles in LRCs, using wide-region and high-resolution electron microscopy, high-pressure freezing/freeze-substitution (HPF/FS), and correlative light and electron microscopy (CLEM) techniques. This work lays the foundation for understanding both the mechanism of PCD and the protective role of β-glucosidases in LRC cells.
The cover image shows an HPF/FS-CLEM image of red fluorescent protein-labeled β-glucosidase-positive ER bodies in contact with the vacuoles.
Image supplied by Yumi Goto and Kiminori Toyooka (RIKEN Center for Sustainable Resource Science, Japan).
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Image supplied by Yumi Goto and Kiminori Toyooka (RIKEN Center for Sustainable Resource Science, Japan).
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