The Actin Cytoskeleton of the Liverwort Riccia fluitans: Effects of Cytochalasin B and Aluminium ions on Rhizoid Tip Growth

Alfano, Flora; Russell, Angela J.; Gambardella, R.; Duckett, G.

doi:10.1016/s0176-1617(11)80400-1

Cited by 24 publications

(10 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2A -E) might be a result of direct/indirect Al interference with the polymerisation of CMTs, which seems to be involved in the disruption of both cell growth, elongation and division events. These results are consistent with the previous reports by Alfano et al (1993), who showed an Al-induced depolymerisation of actin MFs in Riccia fluitans, and by Sasaki et al (1997), who reported in their preliminary study an Al-induced depolymerisation of MTs in wheat root cells. In log-phase tobacco cells treated with Al (50 mM), a detectable level of callose synthesis was initiated (Fig.…”

Section: Discussionsupporting

confidence: 94%

“…Alfano et al (1993) studied the long‐term effect of Al on the actin microfilaments (MFs) in Riccia fluitans , and Grabski and Schindler (1995) reported that exposure of plant cells to Al increased the rigidity of actin MFs in suspension‐cultured soybean cells. Apart from these, until now, there were only a few available reports of Al affecting plant MTs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Differential impacts of aluminium on microtubule organisation depends on growth phase in suspension‐cultured tobacco cells

Sivaguru

Yamamoto

Matsumoto

1999

Physiologia Plantarum

View full text Add to dashboard Cite

We investigated the impacts of aluminium (Al) on the structural organisation of microtubules (MTs) in suspension‐cultured tobacco (Nicotiana tabacum L. cv. Samsun) cells using monoclonal anti‐tubulin antibodies coupled with confocal microscopy. Cells were treated with Al (50 μM) in a simple calcium solution (3 mM CaCl2 and 3% [w/v] sucrose, pH 4.5) up to 24 h. The impacts of Al on tobacco cells were found to be distinct, depending on the growth phase of cells. Cells at logarithmic (log) phase lost their structural integrity of phragmoplasts and spindle MTs during Al treatments. In log‐phase cells, the cortical microtubules (CMTs) showed no visible changes in the initial 1 h, but progressive alteration, such as less prominent (after 6 h) and intensive (from 12 h onwards) depolymerisation of MTs, was registered upon increasing Al treatment duration, which accompanied Al‐induced callose formation. The growth of log‐phase cells showed a tendency of inhibition between 6 and 12 h Al treatment, which led to significant growth inhibition from 12 h onwards, suggesting that Al‐induced depolymerisation of CMTs in log‐phase cells is closely linked to the Al‐induced inhibition of cell growth. In contrast, Al‐induced stabilisation of CMTs was found in stationary‐phase cells and these cells required higher Al levels (100 μM) for the depolymerisation of CMTs. These results provide first circumstantial evidence for both depolymerisation and stabilisation of MTs induced by Al, depending on the phases of plant cell growth.

show abstract

Section: Discussionsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Differential impacts of aluminium on microtubule organisation depends on growth phase in suspension‐cultured tobacco cells

Sivaguru

Yamamoto

Matsumoto

1999

Physiologia Plantarum

View full text Add to dashboard Cite

show abstract

“…As in other tip-growing cells, this targeting is thought to be orchestrated by the interaction of actinmediated vesicle transport with a tip-high Ca2+ gradient (Reiss and Herth, 1979;Kohno and Shimmen, 1987, 1988a, 1988bSchiefelbein et al, 1992;Herrmann and Felle, 1995). The disruption of microtubules, actin microfilaments, or the Ca2+ gradient inhibits tip growth (Lloyd et al, 1987;Heslop-Harrison et al, 1991;Alfano et al, 1993). There is evidence for a role of protein phosphatases in root hair development; application of two inhibitors of Ser / Thr protein phosphatases has been shown to potently inhibit both the initiation and elongation of root hairs in Arabidopsis (Smith et al, 1994).…”

Section: ~~mentioning

confidence: 99%

The COW1 Locus of Arabidopsis Acts after RHD2, and in Parallel with RHD3 and TIP1, to Determine the Shape, Rate of Elongation, and Number of Root Hairs Produced from Each Site of Hair Formation

et al. 1997

View full text Add to dashboard Cite

Two recessive mutant alleles at CAN OF WORMSI (COWI), a new locus involved in root hair morphogenesis, have been identified in Arabidopsis fhaliana L. Heynh. Root hairs on Cowl -mutants are short and wide and occasionally formed as pairs at a single site of hair formation. l h e COWI locus maps to chromosome 4. Root hairs on Cowl-plants form in the usual positions, suggesting that the phenotype is not the result of abnormal positional signals. Root hairs on Cowl-roots begin hair formation normally, forming a small bulge, or root hair initiation site, of normal size and shape and in the usual position on the hair-forming cell. However, when Cowl-root hairs start to elongate by tip growth, abnormalities in the shape and elongation rate of the hairs become apparent. Cenetic evidence from double-mutant analysis of cowl-1 and other loci involved in root hair development supports our conclusion that COW7 is required during root hair elongation. ~~The morphogenesis of multicellular organisms is the result of coordinated changes in the number, position, size, and shape of cells. Cell shape has two different roles: First, coordinated changes in cell shape are required during the elaboration of multicellular structures; for example, during anther maturation, coordinated changes in the elongation of a subset of cells produce the anther stalk. Second, cell shape is important for the function of a number of specialized cell types; for example, leaf trichomes have a polarized structure and shape critica1 to their function in protecting against grazing by insects. Molecular genetic approaches have revealed mechanisms governing cellular morphogenesis, the process of shape change, in Drosophila melanogaster (Adler, 1992; Wong and Adler, 1993) and yeast (Kron and Gow, 1995). These approaches are now being applied to

show abstract

“…In most cases a disappearance and fragmentation of actin filaments is observed. However, in several systems the formation of thicker bundles was noted (Lancelle & Hepler, 1988; Tang et al ., 1989a; Alfano et al ., 1993), which does however, not exclude the simultaneous breakdown of fine bundles of AFs (Miller et al ., 1999). Latrunculins have a similar effect on actin by influencing the balance between monomeric (G‐) and polymeric (F‐) actin (Spector et al ., 1983, 1989; Coué et al ., 1987).…”

Section: Introductionmentioning

confidence: 99%

The cytoskeleton in plant and fungal cell tip growth

Geitmann

Emons

2000

Journal of Microscopy

181

132

View full text Add to dashboard Cite

Tip‐growing cells have a particular lifestyle that is characterized by the following features: (1) the cells grow in one direction, forming a cylindrical tube; (2) tip‐growing cells are able to penetrate their growth environment, thus having to withstand considerable external forces; (3) the growth velocity of tip‐growing cells is among the fastest in biological systems. Tip‐growing cells therefore appear to be a system well suited to investigating growth processes. The cytoskeleton plays an important role in cell growth in general, which is why tip‐growing cells provide an excellent model system for studying this aspect. The cytoskeletal system comprises structural elements, such as actin filaments and microtubules, as well as proteins that link these elements, control their configuration or are responsible for transport processes using the structural elements as tracks. Common aspects as well as differences in configuration and function of the cytoskeleton in various types of tip‐growing cells reveal the general principles that govern the relationship between the cytoskeleton and cell growth.

show abstract

The Actin Cytoskeleton of the Liverwort Riccia fluitans: Effects of Cytochalasin B and Aluminium ions on Rhizoid Tip Growth

Cited by 24 publications

References 22 publications

Differential impacts of aluminium on microtubule organisation depends on growth phase in suspension‐cultured tobacco cells

Differential impacts of aluminium on microtubule organisation depends on growth phase in suspension‐cultured tobacco cells

The COW1 Locus of Arabidopsis Acts after RHD2, and in Parallel with RHD3 and TIP1, to Determine the Shape, Rate of Elongation, and Number of Root Hairs Produced from Each Site of Hair Formation

The cytoskeleton in plant and fungal cell tip growth

Contact Info

Product

Resources

About