Berbel Tornero, Ana

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Berbel Tornero
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Ana
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0000-0002-6446-0693
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2014 - 20152
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Subject: Arabidopsis thaliana ×

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Now showing 1 - 2 of 2
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    Regulation of Compound Leaf Development by PHANTASTICA in Medicago truncatula
    (American Society of Plant Biologists, 2014-01) Ge, Liangfa; Peng, Jianling; Berbel Tornero, Ana; Madueño Albi, Francisco; Chen, Ruijin; Instituto Universitario Mixto de Biología Molecular y Celular de Plantas; National Science Foundation, EEUU; Oklahoma Center for the Advancement of Science and Technology; Generalitat Valenciana
    [EN] Plant leaves, simple or compound, initiate as peg-like structures from the peripheral zone of the shoot apical meristem, which requires class I KNOTTED-LIKE HOMEOBOXI (KNOXI) transcription factors to maintain its activity. The MYB domain protein encoded by the ASYMMETRIC LEAVES1/ROUGH SHEATH2/PHANTASTICA (ARP) gene, together with other factors, excludes KNOXI gene expression from incipient leaf primordia to initiate leaves and specify leaf adaxial identity. However, the regulatory relationship between ARP and KNOXI is more complex in compound-leafed species. Here, we investigated the role of ARP and KNOXI genes in compound leaf development in Medicago truncatula. We show that the M. truncatula phantastica mutant exhibited severe compound leaf defects, including curling and deep serration of leaf margins, shortened petioles, increased rachises, petioles acquiring motor organ characteristics, and ectopic development of petiolules. On the other hand, the M. truncatula brevipedicellus mutant did not exhibit visible compound leaf defects. Our analyses show that the altered petiole development requires ectopic expression of ELONGATED PETIOLULE1, which encodes a lateral organ boundary domain protein, and that the distal margin serration requires the auxin efflux protein M. truncatula PIN-FORMED10 in the M. truncatula phantastica mutant.
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    Pea VEGETATIVE2 Is an FD Homolog That Is Essential for Flowering and Compound Inflorescence Development
    (American Society of Plant Biologists, 2015-04) Sussmilch, FC; Berbel Tornero, Ana; Hecht, V; Vander, JK; Ferrandiz Maestre, Cristina; Madueño Albi, Francisco; Weller, JL; Instituto Universitario Mixto de Biología Molecular y Celular de Plantas; Australian Research Council; Ministerio de Ciencia e Innovación
    [EN] As knowledge of the gene networks regulating inflorescence development in Arabidopsis thaliana improves, the current challenge is to characterize this system in different groups of crop species with different inflorescence architecture. Pea (Pisum sativum) has served as a model for development of the compound raceme, characteristic of many legume species, and in this study, we characterize the pea VEGETATIVE2 (VEG2) locus, showing that it is critical for regulation of flowering and inflorescence development and identifying it as a homolog of the bZIP transcription factor FD. Through detailed phenotypic characterizations of veg2 mutants, expression analyses, and the use of protein-protein interaction assays, we find that VEG2 has important roles during each stage of development of the pea compound inflorescence. Our results suggest that VEG2 acts in conjunction with multiple FLOWERING LOCUS T (FT) proteins to regulate expression of downstream target genes, including TERMINAL FLOWER1, LEAFY, and MADS box homologs, and to facilitate cross-regulation within the FT gene family. These findings further extend our understanding of the mechanisms underlying compound inflorescence development in pea and may have wider implications for future manipulation of inflorescence architecture in related legume crop species.