Fertilidade do solo e absorção de nutrientes em cana-de-açúcar fertilizada com torta de filtro Soil fertility and uptake of nutrients by sugarcane fertilized with filter cake

A utilização dos resíduos orgânicos assume relevante importância nos dias atuais, devido à sua potencialidade de reduzir custos de produção e minimizar impactos ambientais. O trabalho foi desenvolvido objetivando-se avaliar o efeito de diferentes doses de fertilizantes orgânico e mineral na cultura da cana-de-açúcar e nos atributos químicos do solo. O experimento foi conduzido em casa de vegetação em delineamento de blocos casualizados e tratamentos distribuídos em esquema fatorial (5 x 3), sendo cinco doses de torta de filtro (0; 9,25; 18,5; 27,75 e 35 g vaso-1) e três níveis de fertilizante mineral (0; 50 e 100% da dose recomendada), com três repetições, com uma planta por parcela. A aplicação de torta de filtro promoveu melhoria na fertilidade do solo em virtude de aumentar os teores de macro e micronutrientes no solo e reduzir os teores de Al. A torta de filtro promove correção da acidez do solo enquanto os fertilizantes minerais promoveram sua acidificação. A cana-de-açúcar respondeu à adubação com torta de filtro, a qual aumentou o acúmulo de fósforo, potássio e cobre na parte aérea. Recomenda-se o uso de 9,25 g de torta de filtro associada a 50% da adubação mineral, como maneira de maximizar o efeito sobre a produtividade e reduzir custos com fertilizantes minerais.The use of organic wastes plays an important role in agriculture due to its potential for reducing cost of production and minimize environmental impacts. The work was carried out to evaluate the effect of mineral fertilizer and filter cake doses on sugarcane yield and soil chemical characteristics. The experiment was conducted in greenhouse in a randomized block design arranged in a factorial outline with five doses of filter cake (0; 9.25; 18.5; 27.75 e 35 g pot-1), three levels of mineral fertilizer (0; 50 e 100% of the recommended dose) and three replicates with one plant per plot. The results showed that filter cake addition favored soil fertility, increasing the contents of both macro and micronutrients and decreasing Al concentration. Filter cake increased pH while mineral fertilizer acidified the soil. Sugarcane plants responded to filter cake application by increasing the uptake of phosphorus, potassium and copper. The use of 9.25 g of filter cake associated with 50% of the mineral fertilization usually recommended is sufficient in order to increase sugarcane yield while reducing costs with mineral fertilizers

Bayesian phylogenetic inference for COI sequences.

<p>The divergence times of the main nodes are shown, with 95% HPD in parentheses. Black squares represent nodes with posterior probability > 0.7. Branch colors correspond to the geographical regions studied (map in detail).</p

Diversity indices, neutrality tests and results of mismatch distribution analyses for populations and geographical regions.

<p>N = n° of sequences; S = n° of polymorphic sites; H = n° of haplotypes; H_d = haplotype diversity; π = nucleotide diversity; s.d. = standard deviation; D = Tajima’s D; FS = Fu’s FS; <i>r</i> = Harpending’s raggedness index. In bold, the statistical significant values (p<0.05).</p><p>Diversity indices, neutrality tests and results of mismatch distribution analyses for populations and geographical regions.</p

Population pairwise Φ_ST for COI (below diagonal) and ITS2 (above diagonal) datasets.

<p>In bold, the significant values (p<0.05).</p><p>Population pairwise Φ_ST for COI (below diagonal) and ITS2 (above diagonal) datasets.</p

Modeled distributions of <i>Araneus omnicolor</i>.

<p>The distributions in the current and paleoclimate [21 Kya (LGM) and 120 Kya (LIG)] scenarios are represented. The hatched area represents the stable occurrence region during all periods.</p

Results of demographic analyses.

<p>(a) Results of mismatch distribution analyses for COI (left) and ITS2 (right) total datasets and for each geographical region separately. (b) Demographic expansion detected by multilocus EBSP, with the 95% HPD interval shown in gray.</p

The Wnt signaling pathway regulates Nalm-16 b-cell precursor acute lymphoblastic leukemic cell line survival and etoposide resistance

10 p. : il.B-cell precursor acute lymphoblastic leukemia (BCP-ALL) is the most common malignancy in children. The Wnt signaling pathway has been found to be extensively involved in cancer onset and progression but its role in BCP-ALL remains controversial.Weevaluate the role of the Wnt pathway in maintenance of BCP-ALL cells and resistance to chemotherapy. Gene expression profile revealed that BCP-ALL cells are potentially sensitive to modulation of Wnt pathway. Nalm-16 and Nalm-6 cell lines displayed low levels of canonical activation, as reflected by the virtually complete absence of total b-catenin in Nalm-6 and the b-catenin cell membrane distribution in Nalm-16 cell line. Canonical activation with Wnt3a induced nuclear b-catenin translocation and led to BCP-ALL cell death. Lithium chloride (LiCl) also induced a cytotoxic effect on leukemic cells. In contrast, both Wnt5a and Dkk-1 increased Nalm-16 cell survival. Also, Wnt3a enhanced the in vitro sensitivity of Nalm-16 to etoposide (VP-16) while treatment with canonical antagonists protected leukemic cells from chemotherapy-induced cell death. Overall, our results suggest that canonical activation of the Wnt pathway may exerts a tumor suppressive effect, thus its inhibition may support BCP-ALL cell survival