Microtubule encounter-based catastrophe in Arabidopsis cortical microtubule arrays

BMC Plant Biology
Zhihai Chi, Chris Ambrose

Abstract

The cortical microtubules (CMTs) that line the plasma membrane of interphase plant cells are extensively studied owing to their importance in forming cell walls, and their usefulness as a model system for the study of MT dynamic instability and acentrosomal MT organization. CMTs influence the orientation and structure of cellulose microfibrils in the cell wall by cooperatively forming arrays of varied patterns from parallel to netted. These CMT patterns are controlled by the combined activities of MT dynamic instability and MT-MT interactions. However, it is an open question as to how CMT patterns may feedback to influence CMT dynamics and interactions. To address this question, we investigated the effects of CMT array patterning on encounter-based CMT catastrophe, which occurs when one CMT grows into another and is unable to cross over. We hypothesized that the varied CMT angles present in disordered (mixed CMTs) arrays will create more opportunities for MT-MT interactions, and thus increase encounter-based catastrophe rates and distribution. Using live-cell imaging of Arabidopsis cotyledon and leaf epidermal cells, we found that roughly 87 % of catastrophes occur via the encounter-based mechanism, with the remainder occurring...Continue Reading

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Citations

Oct 31, 2018·The Journal of Cell Biology·Francis J McNally, Antonina Roll-Mecak
Jun 26, 2020·Frontiers in Plant Science·Tereza VavrdováGeorge Komis
Dec 12, 2018·Developmental Biology·Jing LiDaniel B Szymanski
Aug 20, 2021·Nature Reviews. Molecular Cell Biology·Nikita B Gudimchuk, J Richard McIntosh

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BETA
confocal microscopy

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Image J
Corel Draw
ImageJ

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