The orientation of cell wall microtubules in wheat coleoptile segments subjected to phytohormone treatment

Volfová, Alena; Chvojka, L.; HaŇkovskÁ, Jana

doi:10.1007/bf02922977

Cited by 14 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, there are numerous reports demonstrating the effectiveness of other phytohormones in reorientating cortical microtubules and spatially related microfibrils in anisotropic growth responses (e.g., Lang et al, 1982;Roberts et al, 1985;Mita and Katsumi, 1986; see R. Bergfeld, V Speth and P. Schopfer Gunning and Hardham, 1982 for older literature). Volfova et al (1977) reported on effects of gibberellin, kinetin, and lAA on parenchyma cells of wheat coleoptiles. Where investigated, these responses are related to a polylamellate appearance of the cell walls concerned.…”

mentioning

confidence: 99%

Reorientation of Microfibrils and Microtubules at the Outer Epidermal Wall of Maize Coleoptiles During Auxin‐Mediated Growth

1988

View full text Add to dashboard Cite

Auxin‐mediated elongation growth of isolated subapical coleoptile segments of maize (Zea mays L.) is controlled by the extensibility of the outer cell wall of the outer epidermis (Kutschera et al., 1987). Here we investigate the hypothesis that auxin controls the extensibility of this wall by changing the orientation of newly deposited microfibrils through a corresponding change in the orientation of cortical microtubules. On the basis of electron micrographs it is shown that cessation of growth after removal of the endogenous source of auxin is correlated with a relative increase of longitudinally orientated microfibrils and microtubules at the inner wall surface. Conversely, reinduction of growth by exogenous auxin is correlated with a relative increase of transversely orientated microfibrils and microtubules at the inner wall surface. These changes can be detected 30–60 min after the removal and addition of auxin, respectively. The functional significance of directional changes of newly desposited wall microfibrils for the control of elongation growth is discussed.

show abstract

mentioning

confidence: 99%