Search results for "Tendril"
showing 4 items of 4 documents
Biomechanics and functional morphology of a climbing monocot.
2015
Climbing monocots can develop into large bodied plants despite being confined by primary growth. In our study on Flagellaria indica we measured surprisingly high stem biomechanical properties (in bending and torsion) and we show that the lack of secondary growth is overcome by a combination of tissue maturation processes and attachment mode. This leads to higher densities of mechanically relevant tissues in the periphery of the stem and to the transition from self-supporting to climbing growth. The development of specialised attachment structures has probably underpinned the evolution of numerous other large bodied climbing monocot taxa.
Etude des relations criblo-vasculaires entre les différents organes de la tige de la vigne (<em>Vitis vinifera</em> L.)
1979
<p style="text-align: justify;">Etude de la structure vasculaire reliant à la tige les feuilles, vrilles, grappes et bourgeons et analyse des relations entre ces organes.</p><p style="text-align: justify;">Sur un orthostique les organes de même nature ont au moins une relation entre eux ; vrilles et grappes sont en rapport direct avec feuilles et bourgeons ; il n'y a pas de communication entre feuilles et bourgeons.</p><p style="text-align: justify;">D'un orthostique à l'autre, feuilles, vrilles et grappes ne sont en relation que par les faisceaux latéraux foliaires. Les bourgeons des deux orthostiques sont anatomiquement indépendants.</p><p style="tex…
Ranke, Burckhardt und die "Orientalische Renaissance"
2021
The essay outlines Ranke's and Burckhardt's responses to the "Eastern Renaissance" triggered by Romanticism and late nineteenth-century culture. Main topics are the productive role of violence in history, the meaning of "sacrifice" and the danger of anonymity in metropolitan life. An important reference is found in a Quinet's book, which is used here as an undelying theme.
Use of carbon dioxide enrichment to obtain adult morphology of grapevinein vitro
1993
A procedure has been developed forin vitro propagation ofVitis vinifera ‘Pinot noir’ from lateral-bud cuttings under high CO2 concentration (1200 µmol mol−1). Because of inhibition of rooting by CO2, this procedure requires a rooting pre-culture of explants on medium with sucrose before the CO2-enriched culture on sucrose-free medium. Shoot growth was enhanced by CO2 enrichment as a result of both a higher rate of leaf production and greater internode elongation. Leaf expansion and tendril growth were promoted and better rooting was obtained. The more significant effect of CO2 enrichment was to promote adult morphology with, in particular, the tendril pattern. Thus, for the first time, grap…