Interrelation between the spatial disposition of actin filaments and microtubules during the differentiation of tracheary elements in culturedZinnia cells

Kobayashi, Hitoshi; Fukuda, Hiroo; Shibaoka, Hiroh

doi:10.1007/bf01282956

Cited by 103 publications

(68 citation statements)

References 16 publications

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“…Work with both developing cotton fibers and tracheary elements suggests that the actin cytoskeleton may also play a role in this process. Treating such cells with cytochalasins, which causes depolymerization of actin filaments, also disrupts MT and microfibril patterns (Kobayashi et al, 1987(Kobayashi et al, , 1988Seagull, 1990). These results suggest that actin may play a primary role in setting the pattern of the cortical MT network, which in turn sets the pattern of cellulose deposition.…”

Section: Role Of the Cytoskeleton In Celwlose Synthesismentioning

confidence: 90%

Cellulose biosynthesis.

1995

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Section: Role Of the Cytoskeleton In Celwlose Synthesismentioning

confidence: 90%

Cellulose biosynthesis.

1995

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“…In contrast, treatment of differentiating tracheary elements with cytochalasin B has no effect on PCD, but perturbs differentiation. 9 In Papaver pollen, relatively transient, but substantial depolymerisation of F-actin by Latrunculin B was sufficient to trigger PCD. Moreover, use of jasplakinolide, which stabilises actin filaments and stimulates polymerisation, to counteract the F-actin depolymerisation induced by SI or Latrunculin B, significantly reduces levels of PCD 47 ( Figure 2a).…”

Section: Evidence That Actin Dynamics Are Involved In Mediating Pcdmentioning

confidence: 99%

“…7,8 In the case of Zinnia model system, before tracheary elements differentiate, cortical microtubules are oriented transversely and spaced randomly. 9 Upon differentiation, microtubules form thick bundles between cytoplasmic domains containing virtually no microtubules (Table 1). Localised deposition of the secondary cell wall material is associated with microtubules.…”

Section: F-actin and Microtubules Reorganise During Developmental Pcdmentioning

confidence: 99%

“…Localised deposition of the secondary cell wall material is associated with microtubules. 10 F-actin is required for the orientation of microtubules, 9 and organisation of F-actin changes during the secondary cell wall deposition from a longitudinal network to transverse bundles located between the bundles of microtubules (Table 1). On completion of the secondary wall thickening, microfilaments and microtubules fragment, and the tonoplast ruptures.…”

Section: F-actin and Microtubules Reorganise During Developmental Pcdmentioning

confidence: 99%

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Organisation and regulation of the cytoskeleton in plant programmed cell death

Smertenko

Franklin‐Tong

2011

Cell Death Differ

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Programmed cell death (PCD) involves precise integration of cellular responses to extracellular and intracellular signals during both stress and development. In recent years much progress in our understanding of the components involved in PCD in plants has been made. Signalling to PCD results in major reorganisation of cellular components. The plant cytoskeleton is known to play a major role in cellular organisation, and reorganization and alterations in its dynamics is a well known consequence of signalling. There are considerable data that the plant cytoskeleton is reorganised in response to PCD, with remodelling of both microtubules and microfilaments taking place. In the majority of cases, the microtubule network depolymerises, whereas remodelling of microfilaments can follow two scenarios, either being depolymerised and then forming stable foci, or forming distinct bundles and then depolymerising. Evidence is accumulating that demonstrate that these cytoskeletal alterations are not just a consequence of signals mediating PCD, but that they also may have an active role in the initiation and regulation of PCD. Here we review key data from higher plant model systems on the roles of the actin filaments and microtubules during PCD and discuss proteins potentially implicated in regulating these alterations.

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“…Lateral microtubule association precedes localized secondary wall formation in developing Zinnia tracheary elements and may be sufficient to localize secondary wall formation (Falconer and Seagull, 1985b). Drugs that disrupt microtubules block localized secondary wall formation, whereas those that destabilize actin filaments do not (Kobayashi et al, 1988). Wheat mesophyll cells also are highly polarized, lobed cells.…”

mentioning

confidence: 99%

The Arabidopsis SPIKE1 Gene Is Required for Normal Cell Shape Control and Tissue Development

et al. 2002

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Regulated growth and cell shape control are fundamentally important to the function of plant cells, tissues, and organs. The signal transduction cascades that control localized growth and cell shape, however, are not known. To better understand the relationship between cytoskeletal organization, organelle positioning, and regulated vesicle transport, we conducted a forward genetic screen to identify genes that regulate cytoskeletal organization in plants. Because of the distinct requirements for microtubules and actin filaments during leaf trichome development, a trichome-based morphology screen is an efficient approach to identify genes that affect cytoplasmic organization. The seedling lethal spike1 mutant was identified based on trichome, cotyledon, and leaf-shape defects. The predicted SPIKE1 protein shares amino acid identity with a large family of adapter proteins present in humans, flies, and worms that integrate extracellular signals with cytoskeletal reorganization. Both the trichome phenotype and immunolocalization data suggest that SPIKE1 also is involved in cytoskeletal reorganization. The assembly of laterally clustered foci of microtubules and polarized growth are early events in cotyledon development, and both processes are misregulated in spike1 epidermal cells. INTRODUCTIONIn multicellular organisms, specialized cytoplasmic organization and cell shape underlie the unique functions of cells, tissues, and organs. It is reasonable to propose that the dynamic properties of the microtubule and actin cytoskeletons and the proteins that bind them underlie much of the observed asymmetry in plant cells. During leaf and root trichoblast morphogenesis, organized actin filaments and microtubules are required (Bibikova et al., 1999;Mathur et al., 1999;Szymanski et al., 1999;Baluska et al., 2000). We are using the diagnostic shape defects of cytoskeleton-disrupted leaf trichomes to guide mutant screens for essential genes that participate in cytoskeletal reorganization and morphogenesis.Decades of cytological and biochemical research have demonstrated the importance of the actin filament and microtubule cytoskeletons during plant morphogenesis (for reviews of the interphase microtubule and actin cytoskeletons in plant cells, see Giddings and Staehelin, 1991;Cyr, 1994;Staiger, 2000). In most plant cell types, the interphase microtubule array is cortical. The most commonly cited function of the cortical microtubule array is the regulation of the alignment of newly synthesized cellulose microfibrils. However, there are cases in which microtubules and cellulose microfibrils are not coaligned (Baskin et al., 1999; Wasteneys, 2000). The interphase actin filament cytoskeleton is composed of bundled transvacuolar filaments, nucleus-associated filaments, and cortical actin filaments (Traas et al., 1987). Actin filaments provide both a scaffolding for the relatively immobile network of the endoplasmic reticulum and tracks for the rapid intracellular transport of Golgi stacks (Satiat-Jeunemaitre and Hawes, 1996;Boevink...

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Interrelation between the spatial disposition of actin filaments and microtubules during the differentiation of tracheary elements in culturedZinnia cells

Cited by 103 publications

References 16 publications

Cellulose biosynthesis.

Cellulose biosynthesis.

Organisation and regulation of the cytoskeleton in plant programmed cell death

The Arabidopsis SPIKE1 Gene Is Required for Normal Cell Shape Control and Tissue Development

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