1980
DOI: 10.1007/bf01004627
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Zur Evolution des Parasitismus bei denScrophulariaceae undOrobanchaceae

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Cited by 20 publications
(7 citation statements)
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“…This assumption correlates very well with the following observations carried out on the European species, showing a relatively primitive level of parasitic adaptations (Weber, 1980), i.e. (1) an often irregular distribution of the trichomes in the corolla, (2) glandular trichomes never composed of more than four cells, and (3) nonglandular trichomes on chlorophyllous organs rarely showing a regular, multicellular trichome base.…”
Section: Lndumentum and Evolutionary Trendssupporting
confidence: 90%
“…This assumption correlates very well with the following observations carried out on the European species, showing a relatively primitive level of parasitic adaptations (Weber, 1980), i.e. (1) an often irregular distribution of the trichomes in the corolla, (2) glandular trichomes never composed of more than four cells, and (3) nonglandular trichomes on chlorophyllous organs rarely showing a regular, multicellular trichome base.…”
Section: Lndumentum and Evolutionary Trendssupporting
confidence: 90%
“…Light microscopy studies of cellular markers in primary haustoria of O. crenata and host Vicia narbonensis show phloemphloem continuity (Dörr and Kollmann, 1995) that had not been demonstrated in previous microscopy studies or in secondary haustoria of Orobanche (Dörr and Kollmann, 1995). Phloem-phloem continuity has also been demonstrated in the leaf haustoria of Hyobanche (Weber, 1980). All haustoria thus far examined have dense parenchyma at the interface between host and parasite tissues, and these are thought to play an important role in transforming host nutrients into forms more easily utilized by the parasite.…”
Section: Exogenous Acquisition Of Rubisco From Hosts Of Hyobanche-mentioning
confidence: 89%
“…The evolution of haustoria in Orobanchaceae is complex and may include convergence and reversal according to most recent phylogenetic hypotheses (Young et al, 1999). To further complicate matters, Hyobanche displays a unique type of leaf haustorium not found in any other species of parasitic plant, with the possible exception of Orobanche teucrii (Weber, 1980), certainly an example of parallel evolution. Initially, Hyobanche seedlings form a primary haustorium at the base of the emerging radical from which rhizomes grow.…”
Section: Exogenous Acquisition Of Rubisco From Hosts Of Hyobanche-mentioning
confidence: 99%
“…According to Boeshore, the evolutionary series among parasitic figworts and broomrapes involved progressive enlargement and consolidation of haustoria (the connection to the host), shortening of the vegetative stem, reduction of leaves, simplification of the inflorescence, change from few, large seeds to numerous, small seeds, and a reduction in the ovary from two locules to one. Weber constructed a different evolutionary series based on haustorial anatomy (Weber, 1980), but otherwise, Boeshore's depiction of the group's evolution has endured remarkably well to the present. Later authors have cited Boeshore and reiterated his ideas.…”
mentioning
confidence: 97%