Motile plant cell body: a ‘bug’ within a ‘cage’

Baluška, Frantǐsek; Volkmann, Dieter; Barlow, Peter W.

doi:10.1016/s1360-1385(00)01862-8

Cited by 28 publications

(21 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By efficient sequestration of plant profilin within the nuclear compartment and its stimulusresponsive release into the cytoplasm, plant nuclei could directly remodel the actin cytoskeleton within the cytoplasm. This feature fits well to our plant "cell body" concept (Baluška et al 1997b, Baluška et al 2000a, Baluška et al 2001b) which provides a conceptual framework for the capability of plant nuclei to actively remodel the cytoplasmic architecture.…”

Section: Peripheries (De) Perinuclear Cytoplasmic Strands (E) and Tsupporting

confidence: 73%

Mastoparan Alters Subcellular Distribution of Profilin and Remodels F-Actin Cytoskeleton in Cells of Maize Root Apices

Baluška¹,

Witsch²,

Peters³

et al. 2001

Plant and Cell Physiology

Self Cite

View full text Add to dashboard Cite

;Indirect immunofluorescence localization of profilin in cells of maize root apices revealed that this abundant protein was present both in the cytoplasm and within nuclei. Nucleo-cytoplasmic partitioning of profilin exhibits tissuespecific and developmental features. Mastoparan-mediated activation of heterotrimeric G-proteins, presumably through triggering a phosphoinositide-signaling pathway based on phosphatidylinositol-4,5-bisphosphate (PIP 2 ), induced relocalization of profilin from nuclei into the cytoplasm of root apex cells. In contrast, PIP 2 accumulated within nuclei of mastoparan-treated root cells. Intriguingly, cytoplasmic accumulation of profilin was associated with remodeling of F-actin arrays in root apex cells. Specifically, dense F-actin networks were dismantled and distinct actin patches became associated with the periphery of small vacuoles. On the other hand, disruption of F-actin with the G-actin sequestering agent latrunculin B does not affect the subcellular distribution of profilin or PIP 2 . These data suggest that nuclear profilin can mediate a stimulus-response action on the actin cytoskeleton which is somehow linked to a phosphoinositide-signaling cascade.

show abstract

Section: Peripheries (De) Perinuclear Cytoplasmic Strands (E) and Tsupporting

confidence: 73%

Mastoparan Alters Subcellular Distribution of Profilin and Remodels F-Actin Cytoskeleton in Cells of Maize Root Apices

Baluška¹,

Witsch²,

Peters³

et al. 2001

Plant and Cell Physiology

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the plant lineage, this mechanism has been retained in multinucleate tissues, such as meiocytes, nuclear endosperm, and female gametophytes (Otegui and Staehelin, 2000;Baluska et al, 2001;Brown and Lemmon, 2001), which cellularize after repeated rounds of karyokinesis. During cellularization, each nucleus forms an extensive radial microtubule array, and cell plate deposition occurs in the zone of microtubule overlap by means of a centrifugally expanding phragmoplast (or several miniature phragmoplasts).…”

Section: Discussionmentioning

confidence: 99%

“…In green algae and cellularizing plant tissues, nuclei specify the division plane by defining a cytoplast (also termed a nuclear cytoplasmic domain [Brown and Lemmon, 2001]) using radial microtubules, with cytokinesis occurring in the zone of microtubule overlap (Pickett-Heaps et al, 1999;Baluska et al, 2001;Brown and Lemmon, 2001). The organization of microtubule arrays in polyspermic S. compressa zygotes is consistent with this mechanism; radial microtubule arrays extending outward from nuclei interdigitate in the plane of subsequent division ( Figure 6).…”

Section: Microtubules and Division Plane Specificationmentioning

confidence: 99%

“…Asymmetric division in Azolla root cells (Gunning et al, 1978) and in onion guard mother cells (Mineyuki and Palevitz, 1990) provides clear examples: a preprophase band of microtubules forms in the cell cortex, marking the plane of future division, and the nucleus migrates to this site before spindle formation. These two general mechanisms are not mutually exclusive, and in many divisions in higher plants, both cellular asymmetry and nuclear position contribute to division plane specification (Gallagher and Smith, 1997;Smith, 1999;Sylvester, 2000;Baluska et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Asymmetric Division in Fucoid Zygotes Is Positioned by Telophase Nuclei

2003

View full text Add to dashboard Cite

The relative contributions of cell polarity and nuclear position in specifying the plane of asymmetric division in fucoid zygotes were investigated. In zygotes developing normally, telophase nuclei were positioned parallel to the polar growth axis, and the division plane bisected both axes. To assess division plane specification, the colinearity of the nuclear and growth axes was uncoupled by treatment with pharmacological agents. Spatial correlations between the growth axis, telophase nuclei, and the division plane were analyzed in the treated zygotes. In all cases, cytokinesis was oriented transverse to the telophase mitotic array and was less well aligned with the growth axis. Telophase nuclei also played a predominant role in positioning the division plane in polyspermic zygotes. Microtubules from the telophase nuclei interdigitated throughout the plane of subsequent cytokinesis, and we speculate that they specify the division plane. Morphological markers of the division plane were not observed before telophase; the earliest division marker detected was a plate of actin that assembled in the zone of microtubule overlap late in telophase. These findings are consistent with division plane specification at cytoplast boundaries.

show abstract

“…Similar to yeast, almost all eukaryotic cells, with the exception of most elongating higher plant cells, assemble actin-enriched cell periphery domains towards which they recruit a dynamic cytoskeleton and exocytotic vesicles for local growth (30)(31)(32) ( Fig. 2).…”

Section: Polarly Growing Yeast Cells Assemble Growing Domainsmentioning

confidence: 99%

The architecture of polarized cell growth: The unique status of elongating plant cells

et al. 2003

Self Cite

View full text Add to dashboard Cite

Polarity is an inherent feature of almost all prokaryotic and eukaryotic cells. In most eukaryotic cells, growth polarity is due to the assembly of actin-based growing domains at particular locations on the cell periphery. A contrasting scenario is that growth polarity results from the establishment of non-growing domains, which are actively maintained at opposite end-poles of the cell. This latter mode of growth is common in rod-shaped bacteria and, surprisingly, also in the majority of plant cells, which elongate along the apical-basal axes of plant organs. The available data indicate that the non-growing end-pole domains of plant cells are sites of intense endocytosis and recycling. These actin-enriched end-poles serve also as signaling platforms, allowing bidirectional exchange of diverse signals along the supracellular domains of longitudinal cell files. It is proposed that these actively remodeled end-poles of elongating plant cells remotely resemble neuronal synapses.

show abstract

Motile plant cell body: a ‘bug’ within a ‘cage’

Cited by 28 publications

References 52 publications

Mastoparan Alters Subcellular Distribution of Profilin and Remodels F-Actin Cytoskeleton in Cells of Maize Root Apices

Mastoparan Alters Subcellular Distribution of Profilin and Remodels F-Actin Cytoskeleton in Cells of Maize Root Apices

Asymmetric Division in Fucoid Zygotes Is Positioned by Telophase Nuclei

The architecture of polarized cell growth: The unique status of elongating plant cells

Contact Info

Product

Resources

About