Abstract
Two complexes at the site of microtubule nucleation.
Highlights
Cortical microtubule (MT) arrays are dynamic filamentous structures that are essential for cell differentiation and development in plants
Could the augmin complex and -TuRC coordinate MT-dependent MT nucleation in interphase plant cells to orchestrate the formation of cortical MT arrays? In this study, Liu et al [5] addressed the above question using both genetics and cell biology in interphase plant cells
By tracking the dynamics of two green fluorescent protein (GFP)-tagged augmin subunits AUG3 and AUG7, the authors showed that the augmin complex was frequently recruited to interphase cortical MTs and often preceded both branching and parallel MT nucleation
Summary
Cortical microtubule (MT) arrays are dynamic filamentous structures that are essential for cell differentiation and development in plants. The molecular mechanisms that control the organization of cortical MT arrays are not well understood. Studies have revealed that the formation of cortical MT arrays involves MT nucleation on existing cortical MTs. The growth of new MTs follows the polarity of existing MTs and the orientation of new MTs is either in parallel with extant MTs or at a small angle (about 40 degree) to the extant MTs [1].
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