Structure et fonctionnement d'un rétrotransposon de tabac

National audienc

Caractérisation d'éléments transposables chez les Nicotianées

National audienc

Isolement d'un nouvel element transposable de type Ac mobile chez Nicotiana tabacum

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Eléments transposables et analyse de la biodiversité végétale

60 ref. chap. 19National audienc

Technoscope

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Régulation de l'expression du retrotransposon TnT1 du tabac

National audienc

BARRAGEM DE PORTO PRIMAVERA E O TRANSPORTE FLUVIAL NA SEÇÃO DE PORTO SÃO JOSÉ, RIO PARANÁ

The Porto Primavera Dam caused the decrease of the concentration of suspended load and reduction of the size of the bed forms of Paraná River, but the effects of the construction on fluvial transport have not yet been quantified. In order to do that, this paper aims to evaluate the influence of the dam on the sediment transport in the section of Porto São José. Thus, data of Porto São José Fluviometric Station, field and or - bital images information available in literature were used. The data were analyzed by linear regression to obtain significant correlation between sediment transport and river discharge. The equations with significant coefficient of determination were used to estimate the annual average transport for different time periods. The suspended transport before construction was 214.1 kg/s, increased to 222.2 kg/s during construction and decreased to 56.4 kg/s after completion of the dam. The bed load transport was 99.7 kg/s during the construction, decreased to 86.2 kg/s during 1999 and 2000 and to 41.2 kg/s after 2001. In the same period the total transport decreased from 321.9 kg/s to 177.8 and finally to 91.2 kg/s. These results indicated that the Porto Primavera Dam reduced 74.6% of the suspended transport, 58.7% of the bed load transport, 71.7% of the total transport and increased the proportion of the bed load of 33, 9% to 44.5% of total

The evolutionary analysis of the Tnt1 retrotransposon in Nicotiana species reveals the high variability of its regulatory sequences

5 graph.International audienc

Microbial elicitors of plant defence responses activate transcription of a retrotransposon

International audienc

Tnt1, a mobile retroviral-like transposable element of tobacco isolated via plant cell genetics

International audienc