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Control of Pistil Development in Arabidopsis thaliana by a Novel Class of Regulatory Genes
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för evolutionsbiologi, Fysiologisk botanik.
2003 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

The pistil, or the gynoecium, is the female reproductive organ of the angiosperm flower and its ontogeny has been studied in the model plant Arabidopsis thaliana. The mature Arabidopsis gynoecium consists of a basal ovary that contains the ovules, a short style and an apical stigma that serves as the site of pollen adherence and germination. This thesis describes the identification and functional characterisation of genes with roles in the regulation of Arabidopsis gynoecium development.

Mutant analyses and sequence similarity database searches led to the identification of a small Arabidopsis gene family, denoted the SHI gene family, the ten members of which encode proteins with zinc finger-like motifs. This class of genes is novel and appears to be unique to plants.

Double, triple and quadruple mutant analyses revealed that at least six of the SHI-related genes, STY1, STY2, SHI, SRS4, SRS5, and LRP1, redundantly contribute to the formation of stylar and stigmatic tissues in developing gynoecia. Several of the genes appear also to influence carpel fusion and vascular patterning in the gynoecium. Gynoecia of transgenic plants that express STY1 or STY2 constitutively develop ectopic style cells, confirming a role for the genes in the promotion of style formation. STY1, STY2, SHI and SRS5 are expressed in the apical parts of the developing gynoecium and, hence, likely act cell autonomously. As judged from mutant and overexpression analyses, the SHI-related genes appear also to regulate leaf development. Possibly, SHI family members act in concert with the plant growth hormones gibberellin and auxin.

sted, utgiver, år, opplag, sider
Uppsala: Acta Universitatis Upsaliensis , 2003. , s. 50
Serie
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 827
Emneord [en]
Biology
Emneord [sv]
Biologi
HSV kategori
Forskningsprogram
fysiologisk botanik
Identifikatorer
URN: urn:nbn:se:uu:diva-3366ISBN: 91-554-5593-X (tryckt)OAI: oai:DiVA.org:uu-3366DiVA, id: diva2:162510
Disputas
2003-05-09, lecture hall, room 3041, Department of Physiological Botany, 752 36 Uppsala, 10:00
Opponent
Veileder
Tilgjengelig fra: 2003-04-15 Laget: 2003-04-15bibliografisk kontrollert
Delarbeid
1. The Arabidopsis dwarf mutant shi exhibits reduced gibberellin responses conferred by overexpression of a new putative zinc finger protein
Åpne denne publikasjonen i ny fane eller vindu >>The Arabidopsis dwarf mutant shi exhibits reduced gibberellin responses conferred by overexpression of a new putative zinc finger protein
1999 Inngår i: Plant Cell, Vol. 11, nr 6, s. 1019-1031Artikkel i tidsskrift (Fagfellevurdert) Published
Identifikatorer
urn:nbn:se:uu:diva-90220 (URN)
Tilgjengelig fra: 2003-04-15 Laget: 2003-04-15bibliografisk kontrollert
2. The Arabidopsis protein SHI represses gibberellin responses in Arabidpsis and Barley.
Åpne denne publikasjonen i ny fane eller vindu >>The Arabidopsis protein SHI represses gibberellin responses in Arabidpsis and Barley.
2001 Inngår i: Plant Physiology, Vol. 127, nr 3, s. 937-948Artikkel i tidsskrift (Fagfellevurdert) Published
Identifikatorer
urn:nbn:se:uu:diva-90221 (URN)
Tilgjengelig fra: 2003-04-15 Laget: 2003-04-15bibliografisk kontrollert
3. STY1 and STY2 promote the formation of apical tissues during Arabidopsis gynoecium development
Åpne denne publikasjonen i ny fane eller vindu >>STY1 and STY2 promote the formation of apical tissues during Arabidopsis gynoecium development
Vise andre…
2002 Inngår i: Development, Vol. 129, nr 20, s. 4707-4717Artikkel i tidsskrift (Fagfellevurdert) Published
Identifikatorer
urn:nbn:se:uu:diva-90222 (URN)
Tilgjengelig fra: 2003-04-15 Laget: 2003-04-15bibliografisk kontrollert
4. Control of gynoecium development by STYLISH genes
Åpne denne publikasjonen i ny fane eller vindu >>Control of gynoecium development by STYLISH genes
Manuskript (Annet vitenskapelig)
Identifikatorer
urn:nbn:se:uu:diva-90223 (URN)
Tilgjengelig fra: 2003-04-15 Laget: 2003-04-15 Sist oppdatert: 2010-01-13bibliografisk kontrollert
5. Auxin and STY genes in Arabidopsis gynoecium development
Åpne denne publikasjonen i ny fane eller vindu >>Auxin and STY genes in Arabidopsis gynoecium development
Manuskript (Annet vitenskapelig)
Identifikatorer
urn:nbn:se:uu:diva-90224 (URN)
Tilgjengelig fra: 2003-04-15 Laget: 2003-04-15 Sist oppdatert: 2010-01-13bibliografisk kontrollert

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