Kátia Castanho Scortecci

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Plant species have evolved a wide variety of flowering habits, each adapted to maximize reproductive success in their local environment. Even within a species, accessions from different environments can exhibit markedly different flowering behavior. In Arabidopsis, some accessions are rapid-cycling summer annuals, whereas others accessions are late(More)
The timing of flowering is important for the reproductive success of plants. Here we describe the identification and characterization of a new MADS-box gene, FLOWERING LOCUS M (FLM), which is involved in the transition from vegetative to reproductive development. FLM is similar in amino-acid sequence to FLC, another MADS-box gene involved in flowering-time(More)
The occurrence of bacteria with a reduced genome, such as that found in Mycoplasmas, raises the question as to which genes should be enough to guarantee the genomic stability indispensable for the maintenance of life. The aim of this work was to compare nine Mycoplasma genomes in regard to DNA repair genes. An in silico analysis was done using six(More)
FLOWERING LOCUS M (FLM) is a MADS-domain gene that acts as an inhibitor of flowering in Arabidopsis. Here we describe the genetic interaction of FLM with genes in the photoperiod and autonomous flowering pathways. Although the sequence of FLM is most similar to that of FLC, FLM and FLC interact with different flowering pathways. It has been previously shown(More)
Transposable elements are used in heterologous plant hosts to clone genes by insertional mutagenesis. The Activator (Ac) transposable element has been cloned from maize, and introduced into a variety of plants. However, differences in regulation and transposition frequency have been observed between different host plants. The cause of this variability is(More)
Retrotransposons are ubiquitous mobile genetic elements that transpose through an RNA intermediate. One of the best known plant retrotransposon, Tnt1, was isolated from tobacco and showed an extensive distribution in the Nicotiana genus. We investigated the presence of related sequences in the Lycopersicon genus, another member of the Solanaceae family.(More)
The scorpion Tityus stigmurus is widely distributed in Northeastern Brazil and known to cause severe human envenoming, inducing pain, hyposthesia, edema, erythema, paresthesia, headaches and vomiting. The present study uses a transcriptomic approach to characterize the gene expression profile from the non-stimulated venom gland of Tityus stigmurus scorpion.(More)
We have introduced the maize Ac transposable element in Arabidopsis thaliana and found that after three selfing generations, the element is immobile and extensively methylated. Moreover, the nopaline synthase (nos) gene present on the same transferred T-DNA, was active early after transformation and regeneration, but inactive in most of the S1 progeny. We(More)
Katia C. Scortecci1, Silvana Creste2, Tercilio Calsa Jr.3, Mauro A. Xavier2, Marcos G. A. Landell2, Antonio Figueira4 and Vagner A. Benedito5* 1Department of Cell Biology and Genetics, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN 2Centro de Cana – Instituto Agronômico de Campinas (IAC), Ribeirão Preto, SP 3Department of Genetics,(More)
The role of phosphorus (P) status in root-zone CO(2) utilisation for organic acid synthesis during Al(3+) toxicity was assessed. Root-zone CO(2) can be incorporated into organic acids via Phosphoenolpyruvate carboxylase (PEPC, EC P-deficiency and Al(3+) toxicity can induce organic acid synthesis, but it is unknown how P status affects the(More)