Nicotiana tabacum actin-depolymerizing factor 2 is involved in actin-driven, auxin-dependent patterning

Durst, Steffen; Nick, Peter; Maisch, Jan

doi:10.1016/j.jplph.2013.03.002

Cited by 18 publications

(10 citation statements)

References 51 publications

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“…Actin binding proteins (ABPs) control the functional link between the F-actin and the auxin flow [41]. In addition to cell elongation, auxins regulate fruit set, growth and ripening, apical dominance, and leaf senescence, as well as playing an essential role in tropic responses to light and gravity [42].…”

Section: Discussionmentioning

confidence: 99%

Genome-Wide Identification, Characterization and Expression Profiling of ADF Family Genes in Solanum lycopersicum L.

Khatun

Robin

Park

et al. 2016

Genes

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The actin depolymerizing factor (ADF) proteins have growth, development, defense-related and growth regulatory functions in plants. The present study used genome-wide analysis to investigate ADF family genes in tomato. Eleven tomato ADF genes were identified and differential expression patterns were found in different organs. SlADF6 was preferentially expressed in roots, suggesting its function in root development. SlADF1, SlADF3 and SlADF10 were predominately expressed in the flowers compared to the other organs and specifically in the stamen compared to other flower parts, indicating their potential roles in pollen development. The comparatively higher expression of SlADF3 and SlADF11 at early fruit developmental stages might implicate them in determining final fruit size. SlADF5 and SlADF8 had relatively higher levels of expression five days after the breaker stage of fruit development, suggesting their possible role in fruit ripening. Notably, six genes were induced by cold and heat, seven by drought, five by NaCl, and four each by abscisic acid (ABA), jasmonic acid (JA) and wounding treatments. The differential expression patterns of the SlADF genes under different types of stresses suggested their function in stress tolerance in tomato plants. Our results will be helpful for the functional characterization of ADF genes during organ and fruit development of tomato under different stresses.

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Section: Discussionmentioning

confidence: 99%

Genome-Wide Identification, Characterization and Expression Profiling of ADF Family Genes in Solanum lycopersicum L.

Khatun

Robin

Park

et al. 2016

Genes

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“…Importantly, F-actin and auxin transport are connected via feedback interactions which are at the core of actin–auxin oscillations (Nick et al, 2009; Nick, 2010; Qiao et al, 2010; Durst et al, 2013). It was a big surprise when we discovered more than 10 years ago that the major cargo of endocytic recycling vesicles are cell wall pectins cross-linked with boron and calcium (Baluška et al, 2002; Yu et al, 2002).…”

Section: Oscillating Plant Synapses: Actin–auxin Oscillator Meets Auxmentioning

confidence: 99%

“…It was a big surprise when we discovered more than 10 years ago that the major cargo of endocytic recycling vesicles are cell wall pectins cross-linked with boron and calcium (Baluška et al, 2002; Yu et al, 2002). The actin–auxin oscillations characterized in tobacco BY-2 cells, organized into single cell files (Nick et al, 2009; Nick, 2010; Qiao et al, 2010; Durst et al, 2013), are apparently present also in the root apices which are composed of numerous independent but integrated cell files which are interconnected, both symplastically and electrically, via numerous cell–cell plasmodesmata (Baluška et al, 2001c, 2003a; Barlow et al, 2004; Wojtaszek et al, 2004; Šamaj et al, 2006). Similarly as the plant synapses, also these plasmodesmata, and especially their groupings known as pit-fields, are enriched with abundant F-actin/myosin VIII meshworks and active in endocytosis/endocytic vesicle recycling (Baluška et al, 2001c, 2003a, 2004c; Volkmann et al, 2003; Šamaj et al, 2006; Golomb et al, 2008; Sattarzadeh et al, 2008).…”

Section: Oscillating Plant Synapses: Actin–auxin Oscillator Meets Auxmentioning

confidence: 99%

Root Apex Transition Zone As Oscillatory Zone

Baluška¹,

Mancuso²

2013

Front. Plant Sci.

118

140

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Root apex of higher plants shows very high sensitivity to environmental stimuli. The root cap acts as the most prominent plant sensory organ; sensing diverse physical parameters such as gravity, light, humidity, oxygen, and critical inorganic nutrients. However, the motoric responses to these stimuli are accomplished in the elongation region. This spatial discrepancy was solved when we have discovered and characterized the transition zone which is interpolated between the apical meristem and the subapical elongation zone. Cells of this zone are very active in the cytoskeletal rearrangements, endocytosis and endocytic vesicle recycling, as well as in electric activities. Here we discuss the oscillatory nature of the transition zone which, together with several other features of this zone, suggest that it acts as some kind of command center. In accordance with the early proposal of Charles and Francis Darwin, cells of this root zone receive sensory information from the root cap and instruct the motoric responses of cells in the elongation zone.

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“…The fine actin strands formed in response to auxin will, in turn, stimulate the efflux of auxin, probably by modulating the cycling of auxin-efflux transporters between cytoplasm and the plasma membrane. The resulting alterations in the efflux of auxin will, in turn, alter the organisation of actin filaments, probably through modulation of actin-depolymerisation factor 2 [ 17 ], thus constituting a self-referring regulatory circuit.…”

Section: Introductionmentioning

confidence: 99%

Actin as Deathly Switch? How Auxin Can Suppress Cell-Death Related Defence

et al. 2015

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Plant innate immunity is composed of two layers – a basal immunity, and a specific effector-triggered immunity, which is often accompanied by hypersensitive cell death. Initiation of cell death depends on a complex network of signalling pathways. The phytohormone auxin as central regulator of plant growth and development represents an important component for the modulation of plant defence. In our previous work, we showed that cell death is heralded by detachment of actin from the membrane. Both, actin response and cell death, are triggered by the bacterial elicitor harpin in grapevine cells. In this study we investigated, whether harpin-triggered actin bundling is necessary for harpin-triggered cell death. Since actin organisation is dependent upon auxin, we used different auxins to suppress actin bundling. Extracellular alkalinisation and transcription of defence genes as the basal immunity were examined as well as cell death. Furthermore, organisation of actin was observed in response to pharmacological manipulation of reactive oxygen species and phospholipase D. We find that induction of defence genes is independent of auxin. However, auxin can suppress harpin-induced cell death and also counteract actin bundling. We integrate our findings into a model, where harpin interferes with an auxin dependent pathway that sustains dynamic cortical actin through the activity of phospholipase D. The antagonism between growth and defence is explained by mutual competition for signal molecules such as superoxide and phosphatidic acid. Perturbations of the auxin-actin pathway might be used to detect disturbed integrity of the plasma membrane and channel defence signalling towards programmed cell death.

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Nicotiana tabacum actin-depolymerizing factor 2 is involved in actin-driven, auxin-dependent patterning

Cited by 18 publications

References 51 publications

Genome-Wide Identification, Characterization and Expression Profiling of ADF Family Genes in Solanum lycopersicum L.

Genome-Wide Identification, Characterization and Expression Profiling of ADF Family Genes in Solanum lycopersicum L.

Root Apex Transition Zone As Oscillatory Zone

Actin as Deathly Switch? How Auxin Can Suppress Cell-Death Related Defence

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