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cliquez sur l'image pour plus d'information sur ces pigments végétaux si particuliers (click on the image for more information about betalains)
A chapter on betalains is included in the book entitled : "Plant pigments and their manipulation" to be published by end 2004 Blackwell Publ.
Dr. Ursula Hinz (jusqu'en septembre 2000)
Maia Zaiko (jusqu'en mars 2000)
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Assistant diplômé
Christinet, L., Burdet, F. X., Zaiko, M., Hinz, U., Zryd, J.-P. (2004) "Characterization and Functional Identification of a Novel Plant 4,5-Extradiol Dioxygenase Involved in Betalain Pigment biosynthesis in Portulaca grandiflora" - Plant Physiol. 134: p. 265-274
Mueller L. A., Hinz U., Zryd J.-P, (1997) "The Formation Of Betalamic Acid and Muscaflavin By Recombinant Dopa-Dioxygenase From Amanita Muscaria." Phytochemistry 44(4): 567-569.
Mueller L.A., Hinz U., Uze M., Sautter C., Zryd J.-P., (1997)."Biochemical complementation of the betalain biosynthetic pathway in P.grandiflora by a fungal 3,4-dihydroxyphenylalanine dioxygenase." Planta 203: 260-263
Hinz, U.G., Fivaz J., Girod P.-A., Zryd J.-P., (1997) "The gene coding for the DOPA dioxygenase involved in betalain biosynthesis in Amanita muscaria and its regulation." Mol Gen Genet 256: 1-6
Mueller L. A., Hinz U., Zryd J.-P., (1996). "Characterization Of a Tyrosinase From Amanita Muscaria Involved In Betalain Biosynthesis." Phytochemistry 42(6): 1511-1515.
Fernandez G, Zryd J.-P, (1995) "Multi-spectral image analysis of plant cells" Proc. 15ème Colloque sur le Traitement des Signaux et Images, Juan-les-Pins, France, pp. 1225-1228, September 18-21, 1995.
Fernandez G, Kunt M, Zryd J.-P (1995) "A new plant cell image segmentation algorithm" Proc. of the 8th Int. Conference on Image Analysis and Processing, San Remo, Italy, pp. 229-234, September 13-15, 1995.
Fernandez G, Kunt M, Zryd J.-P (1995) "Multi-spectral based cell segmentation and analysis" Proc. of the Workshop on Physics-based Modeling in Computer Vision, Cambridge, USA, pp. 166-172, June 18-19, 1995.
Rossi-Hassani BD, Bennani F, Zryd JP (1995) Agrobacterium-Mediated Transformation of Large-Flowered Purslane (Portulaca-Grandiflora H). Genome 38: 752-756
Rossi-Hassani BD, Zryd JP (1995) In-Vitro Culture and Plant-Regeneration of Large Flowered Purslane. Plant Cell Tissue and Organ Culture 41: 281-283
Rossi-Hassani BD, Zryd JP (1995) Evidence of Transposition in Portulaca Grandiflora (Hook). Annales de Génétique 38: 90-96
Rossi-Hassani BD, Zryd JP (1994) Instabilité génétique chez Portulaca grandiflora (HOOK) - Genetic Instability in Portulaca Grandiflora (Hook) . (in french) Annales de Génétique 37: 53-59
Leathers RR, Davin C, Zryd JP (1992) Betalain Producing Cell Cultures of Beta Vulgaris L Var Bikores Monogerm (Red Beet). In Vitro Cellular & Developmental Biology - Plant 28P: 39-45
Girod PA, Zryd JP (1991) Biogenesis of Betalains - Purification and Partial Characterization of Dopa 4,5-Dioxygenase from Amanita Muscaria. Phytochemistry 30: 169-174
Girod PA, Zryd JP (1991) Secondary Metabolism in Cultured Red Beet (Beta-Vulgaris L) Cells - Differential Regulation of Betaxanthin and Betacyanin Biosynthesis. Plant Cell Tissue and Organ Culture 25: 1-12
Trezzini GF, Zryd JP (1991) 2 Betalains from Portulaca Grandiflora. Phytochemistry 30: 1897-1899
Trezzini GF, Zryd JP (1991) Characterization of Some Natural and Semisynthetic Betaxanthins. Phytochemistry 30: 1901-1903
Trezzini G., Zryd J.-P., (1990) "Portulaca grandiflora: a model system for the study of the biochemistry and genetics of betalain biosynthesis" - In Vitro Culture and Horticultural Breeding - Acta Horticulturae 280, 581 -585.
Girod PA, Zryd JP (1987) Clonal Variability and Light Induction of Betalain Synthesis in Red Beet Cell-Cultures. Plant Cell Reports 6: 27-30
Zryd JP, Bauer J, Wyler H, Lavanchy
P (1982) Pigment biosynthesis
and precursor metabolism in red beet semi-continuous supsension cultures.
Proc. 5th Intl. Cong. Plant Tissue & Cell Culture, Tokyo: 387-388
Characterization and Functional Identification of a Novel Plant 4,5-Extradiol Dioxygenase Involved in Betalain Pigment biosynthesis in Portulaca grandiflora - (complete version in pdf format) Christinet, L. PhD Thesis (Doctorat ès Sciences) January 2004 157 pp (4 Mb pdf file)
"Colour-specific genes from betalain producing plants". - (complete version in pdf format) Maia Zaiko, PhD thesis, Lausanne 2000
"Enzymologie de la biosynthèse des bétalaïnes chez Amanita muscaria". Lukas A. Mueller , PhD thesis. Lausanne 1998.
"Mutabilité et biosynthèse des bétalaines chez Portulaca grandiflora Hook". Badr-Din Rossi-Hassani, PhD thesis. Lausanne 1991.
"Génétique
des bétalaïnes chez Portulaca grandiflora Hook." G.F.Trezzini,
Dipl. Sc. Nat. ETHZ, PhD thesis. Lausanne 1990. (abstract in English available
only, otherwise visit UNIL archives )
"Régulation de la biosyntèse des bétalaïnes chez les cellules de Beta vulgaris L en culture". Pierre-Alain Girod, PhD thesis. Lausanne 1989.
"A DOPA-dioxygenase from Portulaca grandiflora involved in the synthesis of betalain pigments", Frédéric Burdet, 2003
"Etude de la variabilité clonale dans la synthèse des bétalaïnes chez les cultures de cellules de Beta vulgaris ssp." Pierre-Alain Girod, Laboratoire de Phytogénétique Cellulaire, Université de Lausanne 1985; sous la direction de Prof.J.-P. Zryd.