2024-03-29T00:45:47Zhttps://www.tdx.cat/oai/requestoai:www.tdx.cat:10803/841022017-09-24T09:18:40Zcom_10803_284col_10803_308
2013-09-18T05:45:04Z
urn:hdl:10803/84102
Towards vitamin biofortification in staple cereal crops in a socio-political and food security context
Farré Martinez, Gemma
false
Christou, Paul
Zhu, Changfu
false
Vitamines
Biofortificació
Blat de moro
Arrós
Seguritat alimentaria
Vitaminas
Biofortifición
Maíz
Arroz
Seguridad alimentaria
Vitamin
Biofortification
Maize
Rice
Food security
Transgenic approaches hold great promise in alleviating, to a major extend such micronutrient deficiencies as exemplified by numerous reports in the literature over the past decade. However, there is a limited understanding of the regulatory mechanisms that control the accumulation of specific vitamins in plants. For this reason, I analyzed a maize population expressing combinations of the carotenogenic genes Zmpsy1, PacrtI, Gllycb, Glbch and ParacrtW in an effort to unravel as yet unknown regulatory bottlenecks.I also investigated in more detail the corn bch family. My results suggest that diverse regulatory strategies may be in operation to control the accumulation of carotenoids in endosperm tissue. I recovered multiple independent transgenic rice lines expressing Arabidopsis thaliana ρ hydroxyphenylpyruvate dioxygenase (HPPD), which catalyzes the first committed step in vitamin E biosynthesis. My results revealed bottlenecks that act as metabolic tipping points in the pathway.
2012-09-17T15:08:30Z
2013-09-18T05:45:04Z
2012-07-05
info:eu-repo/semantics/doctoralThesis
info:eu-repo/semantics/publishedVersion
http://hdl.handle.net/10803/84102
L-970-2012
eng
L'accés als continguts d'aquesta tesi queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons: http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Universitat de Lleida
TDX (Tesis Doctorals en Xarxa)