2015
DOI: 10.1104/pp.15.01403
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Inhibition of Cell Expansion by Rapid ABP1-Mediated Auxin Effect on Microtubules? A Critical Comment

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Cited by 9 publications
(3 citation statements)
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“…In order to understand the influence of DHNQ on the auxin-induced growth of plant cells, our next step was to investigate their impact on microtubule orientation. It was found that the application of IAA to the incubation medium that contained excised coleoptile segments reversed the longitudinal orientation of the cortical microtubules into a transverse orientation (Zandomeni and Schopfer, 1993; Fischer and Schopfer, 1997; Schopfer and Palme, 2016). Our results clearly demonstrate that at all of the concentrations that were tested naphthazarin changed the auxin-induced reorientation of the cortical microtubules (mentioned above) from perpendicular to oblique with respect to the long cell axis (Figure 8).…”
Section: Discussionmentioning
confidence: 99%
“…In order to understand the influence of DHNQ on the auxin-induced growth of plant cells, our next step was to investigate their impact on microtubule orientation. It was found that the application of IAA to the incubation medium that contained excised coleoptile segments reversed the longitudinal orientation of the cortical microtubules into a transverse orientation (Zandomeni and Schopfer, 1993; Fischer and Schopfer, 1997; Schopfer and Palme, 2016). Our results clearly demonstrate that at all of the concentrations that were tested naphthazarin changed the auxin-induced reorientation of the cortical microtubules (mentioned above) from perpendicular to oblique with respect to the long cell axis (Figure 8).…”
Section: Discussionmentioning
confidence: 99%
“…If this is the case, changes in the growth status would have to be associated with a dramatic switch of predominant tissue tension in the epidermis, between a circumferential tension during growth and axial tension when growth has ceased. Thus far, scarce experimental evidence, as well as theoretical considerations, have suggested that cell wall tension on the stem surface is predominantly axial [40,43]. It may be perhaps conceived that during rapid growth, axial tension is relaxed while circumferential tension persists, and, by that process, transverse microtubule orientation is instructed.…”
Section: Discussionmentioning
confidence: 99%
“…The long-time standing ‘acid growth theory’ proposes that auxin promotes expansion by regulating pH-dependent rearrangement of cell wall components 7 , 8 . Although this auxin activity is most likely to be regulated via the nuclear SCF(TIR1/AFB) pathway 13 , other non-genomic effects of auxin including the one on microtubules have been suggested 50 , but widely disputed 51 , 52 .…”
Section: Discussionmentioning
confidence: 99%