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Convergence of developmental mutants into a single tomato model system: `Micro-Tom' as an effective toolkit for plant development research

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Carvalho, Rogerio F. [1] ; Campos, Marcelo L. [1] ; Pino, Lilian E. [1, 2] ; Crestana, Simone L. [1] ; Zsoegoen, Agustin [1] ; Lima, Joni E. [1, 2] ; Benedito, Vagner A. [3] ; Peres, Lazaro E. P. [1]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Dept Biol Sci LCB, Lab Hormonal Control Plant Dev, BR-13418900 Piracicaba, SP - Brazil
[2] USP, Ctr Nucl Energy Agr, BR-13400970 Piracicaba, SP - Brazil
[3] W Virginia Univ, Genet & Dev Biol Program, Div Plant & Soil Sci, Morgantown, WV 26506 - USA
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: PLANT METHODS; v. 7, JUN 29 2011.
Citações Web of Science: 70

Background: The tomato (Solanum lycopersicum L.) plant is both an economically important food crop and an ideal dicot model to investigate various physiological phenomena not possible in Arabidopsis thaliana. Due to the great diversity of tomato cultivars used by the research community, it is often difficult to reliably compare phenotypes. The lack of tomato developmental mutants in a single genetic background prevents the stacking of mutations to facilitate analysis of double and multiple mutants, often required for elucidating developmental pathways. Results: We took advantage of the small size and rapid life cycle of the tomato cultivar Micro-Tom (MT) to create near-isogenic lines (NILs) by introgressing a suite of hormonal and photomorphogenetic mutations (altered sensitivity or endogenous levels of auxin, ethylene, abscisic acid, gibberellin, brassinosteroid, and light response) into this genetic background. To demonstrate the usefulness of this collection, we compared developmental traits between the produced NILs. All expected mutant phenotypes were expressed in the NILs. We also created NILs harboring the wild type alleles for dwarf, self-pruning and uniform fruit, which are mutations characteristic of MT. This amplified both the applications of the mutant collection presented here and of MT as a genetic model system. Conclusions: The community resource presented here is a useful toolkit for plant research, particularly for future studies in plant development, which will require the simultaneous observation of the effect of various hormones, signaling pathways and crosstalk. (AU)

Processo FAPESP: 02/00329-8 - Estudo das bases genéticas e bioquímicas da competência para regeneração in vitro utilizando micro tomateiro (Lycopersicon esculentum cv Micro-Tom) como modelo experimental
Beneficiário:Lázaro Eustaquio Pereira Peres
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores