Journal
FRONTIERS IN PLANT SCIENCE
Volume 4, Issue -, Pages -Publisher
FRONTIERS RESEARCH FOUNDATION
DOI: 10.3389/fpls.2013.00511
Keywords
secondary cell wall; ROP GTPase; MIDD1; cortical microtubule; xylem
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Funding
- Ministry of Education, Science, Sports and Culture of Japan [25114507]
- Japan Society for the Promotion of Science [23227001, 25440128]
- NC-CARP project
- Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO) [20103]
- Grants-in-Aid for Scientific Research [25114507, 25440128, 23227001] Funding Source: KAKEN
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Patterning of the cellulosic cell wall underlies the shape and function of plant cells. The cortical microtubule array plays a central role in the regulation of cell wall patterns. However, the regulatory mechanisms by which secondary cell wall patterns are established through cortical microtubules remain to be fully determined. Our recent study in xylem vessel cells revealed that a mutual inhibitory interaction between cortical microtubules and distinct plasma membrane domains leads to distinctive patterning in secondary cell walls. Our research revealed that the recycling of active and inactive ROP proteins by a specific GAP and GEE pair establishes distinct de novo plasma membrane domains. Active ROP recruits a plant-specific microtubule-associated protein, MIDD1, which mediates the mutual interaction between cortical microtubules and plasma membrane domains. In this mini review, we summarize recent research regarding secondary wall patterning, with a focus on the emerging interplay between plasma membrane domains and cortical microtubules through MIDD1 and ROP.
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