ArticleThe Plant cell2022
MOR1/MAP215 acts synergistically with katanin to control cell division and anisotropic cell elongation in Arabidopsis.
Article in The Plant cell, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 21 citations in OpenAlex.
- The kinesin motor POS3 and the microtubule polymerase MOR1 coordinate chromosome congression during mitosis in Arabidopsis.The Plant cell · 2025Article
- Three levels of heterogeneity - growth of Arabidopsis leaf epidermis.BMC plant biology · 2025Article
- Anti-microtubular activity of total alkaloids and aqueous extract of Detarium microcarpum a medicinal plant harvested in Mali.Protoplasma · 2025Article
- Article
- Damage-repair events increase the instability of cortical microtubules in Arabidopsis.Molecular biology of the cell · 2024Article
- Article
- New insights into the functions and regulations of MAP215/MOR1 and katanin, two conserved microtubule-associated proteins in Arabidopsis.Plant signaling & behavior · 2023Article
- Differentiation Disorders ofCells · 2023Article
- Microtubule Regulation in Plants: From Morphological Development to Stress Adaptation.Biomolecules · 2023Review
- Genome-wide identification and expression analysis of GDP-D-mannose pyrophosphorylase and KATANIN inFrontiers in plant science · 2023Article
- Double Puzzle: Morphogenesis of the Bi-Layered Leaf Adaxial Epidermis ofPlants (Basel, Switzerland) · 2022Article
- MOR1 keeps microtubule severing by KTN1 in the right tempo.The Plant cell · 2022Article
Corrections and comments
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Authors and funding
9 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The MAP215 family of microtubule (MT) polymerase/nucleation factors and the MT severing enzyme katanin are widely conserved MT-associated proteins (MAPs) across the plant and animal kingdoms. However, how these two essential MAPs coordinate to regulate plant MT dynamics and development remains unknown. Here, we identified novel hypomorphic alleles of MICROTUBULE ORGANIZATION 1 (MOR1), encoding the Arabidopsis thaliana homolog of MAP215, in genetic screens for mutants oversensitive to the MT-destabilizing drug propyzamide. Live imaging in planta revealed that MOR1-green fluorescent protein predominantly tracks the plus-ends of cortical MTs (cMTs) in interphase cells and labels preprophase band, spindle and phragmoplast MT arrays in dividing cells. Remarkably, MOR1 and KATANIN 1 (KTN1), the p60 subunit of Arabidopsis katanin, act synergistically to control the proper formation of plant-specific MT arrays, and consequently, cell division and anisotropic cell expansion. Moreover, MOR1 physically interacts with KTN1 and promotes KTN1-mediated severing of cMTs. Our work establishes the Arabidopsis MOR1-KTN1 interaction as a central functional node dictating MT dynamics and plant growth and development.
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