Actin polymerization drives polar growth in<i>Arabidopsis</i>root hair cells

Bañuelos-Vazquez, Luis Alfredo; Sánchez, Rosana; Hernández-Barrera, Alejandra; Zepeda‐Jazo, Isaac; Sánchez, Federico; Quinto, Carmen; Torres, Luis Cárdenas

doi:10.4161/psb.29401

Cited by 14 publications

(12 citation statements)

References 17 publications

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“…), are achieved after discrete intervals of time for single cells such as pollen tubes, such a (chemical potential ratchet) mechanism can lead to a kind of 'leap' in the macroscopically (of μm scale) observed growth oscillations (Geitmann and Cresti, 1998;Hepler et al, 2001;Zonia and Munnik, 2007). Similar mechanisms were observed in multicellular models for plant cell differentiation such as rhizodermis (Marzec et al, 2013a) where the growth of root hair tubes occurs by leaps and bounds (Vazquez et al, 2014). This phenomenon may be treated as the final result of the subsequent STs that take place in the cell wall.…”

Section: Perspectivessupporting

confidence: 53%

How to obtain cell volume from dynamic pH, temperature and pressure in plants

Pietruszka

2018

Preprint

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We examined the pH/T duality of acidic pH and temperature (T) for the growth of grass shoots in order to determine the phenomenological equation of wall properties ('equation of state' , EoS) for living plants. By considering non-meristematic growth as a dynamic series of 'state transitions' (STs) in the extending primary wall, we identified the 'critical exponents' (read: optimum) for this phenomenon, which exhibit a singular behaviour at a critical temperature, critical pH and critical chemical potential (μ) in the form of four power laws: transformation. Moreover, the drops in pH that are induced by auxin or fusicoccin, when next converted by the augmented Lockhart equation, are enough to explain a significant fraction of the increase in the growth rate. A self-consistent recurring model is proposed to embrace the inherent complexity of such a biological system, in which several intricate pathways work simultaneously, in order to reconcile the conflicting views of plant cell extension and growth. Eventually, we pose the question: Is the chemical potential of protons a master regulator for tip-growing cells? Author summaryIn plant development, sudden changes such as cell expansion or pollen tube oscillations seem to depend on a correlative group of events rather than on slow shifts in the apex. Hence, in order to understand or to control the processes in the extending cell wall, we need to unravel the general principles and constraints that govern growth. The quest for these principles has primarily focused on the molecular, though merely descriptive, level. Here, we show that it is possible to analyse oscillatory state changes computationally without even requiring knowledge about the exact type of transition. Our results suggest that the cell wall properties and growth of plant cells can be accurately and efficiently predicted by a set of physical and chemical variables such as temperature, pressure and the dynamic pH of the growing plant, which build a scaffold for more specific biochemical predictions. In this context, we observed that cell growth evolves along the path the least action, thereby optimising growth under any physiological conditions. The model equations that we propose span the fields of the biological, physical, chemical and Earth sciences. The common denominator that ties the growth factors together is the chemical potential of protons, which is possibly a central core-controlling mechanism that is able to produce a macroscopic outcome, i.e. structurally and temporally organised apical growth.

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Section: Perspectivessupporting

confidence: 53%

How to obtain cell volume from dynamic pH, temperature and pressure in plants

Pietruszka

2018

Preprint

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“…Importantly, though, all three tip structures are dynamic, which contrasts with the relatively stable F-actin in the subapical regions. Critically, it is the dynamic apical populations that are essential for tip growth (Vidali et al, 2001;Vazquez et al, 2014).…”

Section: Actin Cytoskeletonmentioning

confidence: 99%

Interplay between Ions, the Cytoskeleton, and Cell Wall Properties during Tip Growth

2017

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“…The actin cytoskeleton could drive the intercellular transport system that carries Golgi-derived vesicles containing the materials necessary for cell wall synthesis to cell growth. And a precise regulation of cell growth can be accomplished through the dynamics of F-actin polymerization in pollen tube and root hairs (Seagull, 1990;Vazquez et al, 2014;Chang and Huang, 2015). Polymerization of actin in the transgenic lines (Fig.…”

Section: Ghfannxa Contributes To Fiber Growth Associated With Actin Amentioning

confidence: 99%

“…However, in contrast to the sequence of the cotton genome (Zhang et al, 2015b), little is known about the key regulators involved in fiber elongation and SCW biosynthesis or about the regulatory mechanisms. Ca 2+ , reactive oxygen species (ROS), and actin act as key factors in tip growth processes, such as pollen tube growth and root hair elongation (Foreman et al, 2003;Ogasawara et al, 2008;Kudla et al, 2010;Vazquez et al, 2014). Although fiber elongation differs from pollen tube growth and root hair elongation, studies have increasingly demonstrated that Ca 2+ , ROS, and actin are key factors in fiber cell growth, both directly and indirectly (Qin and Zhu, 2011).…”

mentioning

confidence: 99%

A Cotton Annexin Affects Fiber Elongation and Secondary Cell Wall Biosynthesis Associated with Ca²⁺ Influx, ROS Homeostasis, and Actin Filament Reorganization

et al. 2016

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Actin polymerization drives polar growth inArabidopsisroot hair cells

Cited by 14 publications

References 17 publications

How to obtain cell volume from dynamic pH, temperature and pressure in plants

How to obtain cell volume from dynamic pH, temperature and pressure in plants

Interplay between Ions, the Cytoskeleton, and Cell Wall Properties during Tip Growth

A Cotton Annexin Affects Fiber Elongation and Secondary Cell Wall Biosynthesis Associated with Ca²⁺ Influx, ROS Homeostasis, and Actin Filament Reorganization

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Actin polymerization drives polar growth inArabidopsisroot hair cells

Cited by 14 publications

References 17 publications

How to obtain cell volume from dynamic pH, temperature and pressure in plants

How to obtain cell volume from dynamic pH, temperature and pressure in plants

Interplay between Ions, the Cytoskeleton, and Cell Wall Properties during Tip Growth

A Cotton Annexin Affects Fiber Elongation and Secondary Cell Wall Biosynthesis Associated with Ca2+ Influx, ROS Homeostasis, and Actin Filament Reorganization

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A Cotton Annexin Affects Fiber Elongation and Secondary Cell Wall Biosynthesis Associated with Ca²⁺ Influx, ROS Homeostasis, and Actin Filament Reorganization