Qualidade nutricional de plântulas de cultivares de trigo submetidas à inoculação com Azospirillum, bioestimulante e triadimenol

This study aimed to evaluate the nutritional quality of wheat seedlings subjected to treatments with biostimulant, triadimenol and Azospirillum brasilense. The experimental design was completely randomized, with four replications in a factorial scheme 3 x 8: three wheat cultivars and eight seed treatments. The cultivars used were CD-150, CD-116 and CD-104, and the treatments were a combination of the following: 150 g L-1 of triadimenol (TRI), 90 mg L-1 of kinetin + 50 mg L-1 of gibberellic acid + 50 mg L-1 of indolebutyric acid (KGA), and strains Ab-V5 and Ab-V6 of A. brasilense at the concentration of 2.0 x 108 viable cells mL-1, organized as follows: control, TRI, KGA, AZO, TRI+KGA, TRI+AZO, AZO+KGA and TRI+KGA+AZO. Germination (%), shoot and root dry matter, and the levels of N and K in plant shoot and root were evaluated. The results showed that: TRI, KGA and AZO do not interfere with seed germination of CD-150, CD-116 and CD-104; germination of wheat cultivar CD-104 is greater than of the cultivars CD-150 and CD-116; nutritional quality is affected by the performance of triadimenol in wheat seedlings in both shoot and root, and the isolated use of CGA increases the dry matter portion of the cultivars CD-150, CD-116 and CD-104; treatment KGA+AZO raises the nitrogen levels in the shoot and root in wheat seedlings in the early development of wheat cultivar CD-116.Objetivou-se avaliar a qualidade nutricional de plântulas de trigo submetidas aos tratamentos com bioestimulante, triadimenol e bactéria Azospirillum brasilense. O delineamento utilizado foi inteiramente casualizado, quatro repetições, esquema fatorial 3 x 8 (três cultivares de trigo e oito tratamentos de sementes). As cultivares foram CD-150, CD-116 e CD-104, e os tratamentos foram obtidos da combinação entre: 150 g L-1 de triadimenol (TRI); 90 mg L-1 de cinetina + 50 mg L-1 de ácido giberélico + 50 mg L-1 de ácido indolbutírico (CGA) e estirpes Ab-V5 e Ab-V6 de A. brasilense na concentração de 2,0 x 108 células viáveis mL-1, organizados da seguinte forma: testemunha; TRI; CGA; AZO; TRI+CGA; TRI+AZO; CGA+AZO e TRI+CGA+AZO. Foram avaliadas a germinação (%), matéria seca da parte aérea e raiz e o teor de N e K na parte aérea e raiz. Os resultados evidenciaram que: TRI, CGA e AZO não interferem na germinação das sementes da CD-150, CD-116 e CD-104; a germinação da cultivar de trigo CD-104 é maior que as cultivares CD-150 e CD-116; a qualidade nutricional é prejudicada pela atuação do triadimenol em plântulas de trigo tanto na parte aérea como na raiz, e a utilização isolada de CGA incrementa a massa de matéria seca de parte nas cultivares CD-150, CD-116 e CD-104; O tratamento CGA+AZO eleva o conteúdo de nitrogênio na parte aérea e raiz em plântulas de trigo e no desenvolvimento inicial da cultivar CD-116 de trigo

Desenvolvimento inicial do milho e atributos químicos do solo em função de diferentes doses de silicato de cálcio

Calcium silicate applied to the soil has an effect on plant nutrition since it is a source of silicon, calcium and magnesium. With the aim to evaluate the effect of doses of calcium silicate on soil chemical properties and on early development of corn, an experiment was conducted in a greenhouse, in pots containing eutroferric Oxisol, testing five rates of calcium silicate (0, 1.2; 2.4; 4.8 and 9.6 t ha-1) with four replications in a randomized complete block design. The levels of N, P, K, Ca and Mg in the plant shoot were evaluated, and, at the end of the experiment, shoot dry weight and plant height as well as Ca and Mg, and soil pH were also estimated. Shoot dry matter and plant height were not affected by fertilization with calcium silicate. The application of calcium silicate provided soil amendment, increasing the availability of calcium and magnesium, in addition to increasing the levels of N, K, Ca and Mg in the shoots of corn.O silicato de cálcio, quando aplicado ao solo, tem efeito sobre a nutrição das plantas, uma vez que é fonte de silício, cálcio e magnésio. Com o objetivo de avaliar o efeito de doses de silicato de cálcio sobre atributos químicos do solo e o desenvolvimento inicial da cultura do milho, realizou-se um experimento em casa de vegetação, em vasos com Latossolo Vermelho eutroférrico – LVef, para testar cinco doses de silicato de cálcio (0; 1,2; 2,4; 4,8 e 9,6 t ha-1) com quatro repetições em, delineamento experimental de blocos casualizados. Foram avaliados os teores N, P, K, Ca e Mg da parte aérea, e, ao final do experimento, a massa da matéria seca da parte aérea e altura de plantas, bem como os teores de Ca e Mg e pH do solo. A matéria seca da parte aérea e altura de plantas não foram influenciadas pela adubação com silicato de cálcio. A aplicação de silicato de cálcio promoveu uma ação corretiva no solo, com aumento da disponibilidade de cálcio e magnésio, além de promover incremento dos teores de N, K, Ca e Mg na parte aérea da cultura do milho

Unidades de manejo em sistema de agricultura de precisão na cultura da soja

There has been an increasing use of soil sampling grids for basing the recommendation of lime and fertilizers in a precision agriculture system in the west of Paraná, despising the undulating topography. Thus, this  study  aimed  to  evaluate  the variability of soil fertility and the soybean Trabalho selecionado durante a VI Semana de Ciências Agrárias (VI SECIAGRA), realizada de 01 a 03/10/2012 yield on a farm in the west of Paraná which uses no-till system, previously divided into management units in a precision farming system. The experiment was conducted in eutroferric Oxisol characterized by being extremely loamy, in a property of 17.80 ha in Guaíra (Paraná, Brazil) cropped with soybeans in the 2010/11 season. The mapping of the property was done by collecting geographical coordinates at key points through GPS, and soil samples were collected in eight management units defined by agronomic knowledge of the property. Subsequently, the variables pH CaCl2, Al+3, H+Al, Ca+2, Mg+2, K+, P, P-rem, C, Cu, Zn, Fe, Mn, SB, effective CTC, CTC, V% , Ca/Mg, Ca/K, Mg/K, (Ca+Mg)2/K and K/raiz2(Ca+Mg) were used to establish the dissimilarity matrix and build the map of the property arranging the most similar management units together.  The productivity of the eight management units were also evaluated by using four replications in a completely randomized design, totaling 32 sampling units. The definition of management units by using agronomic knowledge and the regional edaphoclimatic conditions enable to capture the variability of soil fertility. There was the formation of four groups of management based on dissimilarity: group I (management units 1 and 2), group II (3 and 4), group III (5 and 8) and group IV (6 and 7). No difference in soybean yields was observed in the eight management units.É crescente a utilização da divisão em malhas de amostragem de solo para realizar a recomendação de corretivos e fertilizantes em um sistema de agricultura de precisão na região oeste do Paraná, desprezando o relevo ondulado. Dessa forma, o trabalho teve como objetivo avaliar a variabilidade da fertilidade do solo e a produtividade de soja em uma propriedade agrícola no oeste do Paraná, cultivada em sistema de semeadura direta, previamente dividida em unidades de manejo em um sistema de agricultura de precisão. O trabalho foi executado no município de Guaíra (PR), em uma propriedade de 17,80 ha, em Latossolo Vermelho eutroférrico de textura muito argilosa, cultivado com soja na safra 2010/11. O mapeamento da propriedade foi executado por meio da coleta de coordenadas geográficas em pontos chaves por meio de aparelho GPS, sendo realizada amostragem do solo em oito unidades de manejo definidas pelo conhecimento agronômico da propriedade. Posteriormente, foram utilizadas as variáveis pH CaCl2, Al+3, H+Al, Ca+2, Mg+2, K+, P, P-rem, C, Cu, Zn, Fe, Mn, SB, CTC efetiva, CTC, V%, Ca/Mg, Ca/K, Mg/K, (Ca+Mg)2/K e K/raiz2(Ca+Mg) para elaborar a matriz de dissimilaridade e em seguida construir o mapa da propriedade com as unidades de manejo que são mais semelhantes. Também foi avaliada a produtividade das oito unidades de manejo com quatro repetições em delineamento inteiramente casualizado, totalizando 32 unidades amostrais. A definição de unidades de manejo com a utilização de conhecimentos agronômicos e as condições edafoclimáticas regionais permite capturar a variabilidade da fertilidade do solo. Verificou-se a formação de quatro grupos de manejo baseado na dissimilaridade: grupo I, (unidade de manejo 1 e 2); grupo II (3 e 4); grupo III (5 e 8) e grupo IV (6 e 7). Não há diferença na produtividade da cultura da soja nas oito unidades de manejo

NEOTROPICAL XENARTHRANS: a data set of occurrence of xenarthran species in the Neotropics

Xenarthrans – anteaters, sloths, and armadillos – have essential functions for ecosystem maintenance, such as insect control and nutrient cycling, playing key roles as ecosystem engineers. Because of habitat loss and fragmentation, hunting pressure, and conflicts with 24 domestic dogs, these species have been threatened locally, regionally, or even across their full distribution ranges. The Neotropics harbor 21 species of armadillos, ten anteaters, and six sloths. Our dataset includes the families Chlamyphoridae (13), Dasypodidae (7), Myrmecophagidae (3), Bradypodidae (4), and Megalonychidae (2). We have no occurrence data on Dasypus pilosus (Dasypodidae). Regarding Cyclopedidae, until recently, only one species was recognized, but new genetic studies have revealed that the group is represented by seven species. In this data-paper, we compiled a total of 42,528 records of 31 species, represented by occurrence and quantitative data, totaling 24,847 unique georeferenced records. The geographic range is from the south of the USA, Mexico, and Caribbean countries at the northern portion of the Neotropics, to its austral distribution in Argentina, Paraguay, Chile, and Uruguay. Regarding anteaters, Myrmecophaga tridactyla has the most records (n=5,941), and Cyclopes sp. has the fewest (n=240). The armadillo species with the most data is Dasypus novemcinctus (n=11,588), and the least recorded for Calyptophractus retusus (n=33). With regards to sloth species, Bradypus variegatus has the most records (n=962), and Bradypus pygmaeus has the fewest (n=12). Our main objective with Neotropical Xenarthrans is to make occurrence and quantitative data available to facilitate more ecological research, particularly if we integrate the xenarthran data with other datasets of Neotropical Series which will become available very soon (i.e. Neotropical Carnivores, Neotropical Invasive Mammals, and Neotropical Hunters and Dogs). Therefore, studies on trophic cascades, hunting pressure, habitat loss, fragmentation effects, species invasion, and climate change effects will be possible with the Neotropical Xenarthrans dataset

Tetragametic chimerism identified during routine histocompatibility testing

Universidade Federal de São Paulo, Immunogenet Div, São Paulo, BrazilUniversidade Federal de São Paulo, Immunogenet Div, São Paulo, BrazilWeb of Scienc

Association between hepatitis C virus chronic infection and HLA-DRB1 and HLA-DQB1 alleles

Universidade Federal de São Paulo, São Paulo, BrazilUniv Fed Minas Gerais, Clin Hosp, Viral Hepatitis Div, Belo Horizonte, MG, BrazilUniversidade Federal de São Paulo, São Paulo, BrazilWeb of Scienc

Associations between cytokine gene polymorphisms and recurrent pregnancy loss

Since certain cytokines may play a role in unexplained recurrent pregnancy loss (RPL) and also some cytokine gene polymorphisms may affect the level of cytokine production, the aim of the present study was to investigate the relationship between RPL and polymorphisms of the genes coding for TNF-alpha (-308 G --> A), IL-10 (-1082 G --> A), IL-6 (-174 G --> C), and IFN-gamma (+874 A --> T). Genotyping was performed in 48 RPL women and 108 ethnically matched healthy individuals. in addition, we performed a meta-analysis encompassing the present results and those from studies on the association of TNF-alpha, IL-10 and IFN-gamma polymorphisms with RPL published in the literature until December 2001. the results showed: (1) no evidence of association with IL-6 gene polymorphisms; (2) significant associations, revealed by the meta-analysis, with the high cytokine production genotypes of IFN-gamma (+874 T/T: odds ratio (OR) = 1.92, P = 0.04) and IL-10 (-1082 G/G: OR = 1.75, P = 0.03), and a trend for association with the high TNF-alpha production genotypes -308 A/A and A/G (OR = 1.61; P = 0.18). We believe that the associations of these genotypes with RPL are interesting not only as risk factors but also because they represent another piece of evidence that these cytokines might be important in the pathogenesis of RPL. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.Universidade Federal de São Paulo, Dept Obstet, São Paulo, BrazilUniversidade Federal de São Paulo, Dept Pediat, Div Immunogenet, São Paulo, BrazilUniversidade Federal de São Paulo, Dept Obstet, São Paulo, BrazilUniversidade Federal de São Paulo, Dept Pediat, Div Immunogenet, São Paulo, BrazilWeb of Scienc