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2015 ; 6
(ä): 497
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Development of schizogenous intercellular spaces in plants
#MMPMID26191071
Ishizaki K
Front Plant Sci
2015[]; 6
(ä): 497
PMID26191071
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Gas exchange is essential for multicellular organisms. In contrast to the
circulatory systems of animals, land plants have tissues with intercellular
spaces (ICSs), called aerenchyma, that are critical for efficient gas exchange.
Plants form ICSs by two different mechanisms: schizogeny, where localized cell
separation creates spaces; and lysogeny, where cells die to create ICSs. In
schizogenous ICS formation, specific molecular mechanisms regulate the sites of
cell separation and coordinate extensive reorganization of cell walls. Emerging
evidence suggests the involvement of extracellular signaling, mediated by peptide
ligands and leucine-rich repeat receptor-like kinases, in the regulation of cell
wall remodeling during cell separation. Recent work on the liverwort Marchantia
polymorpha has demonstrated a critical role for a plasma membrane-associated
plant U-box E3 ubiquitin ligase in ICS formation. In this review, I discuss the
mechanism of schizogenous ICS formation, focusing on the potential role of
extracellular signaling in the regulation of cell separation.