INFLUÊNCIA DO ESTRESSE SALINO SOBRE A EMERGÊNCIA E DESENVOLVIMENTO INICIAL DO PINHÃO MANSO

O presente trabalho teve o objetivo de avaliar a influência do estresse salino sobre a emergência e desenvolvimento inicial do pinhão manso (Jatropha curcas L.). Os tratamentos constaram de dois sais (NaCl e KCl) e seis concentrações (0; 2,0; 4,0; 6,0; 8,0 e 10 dS.m-1) distribuídos em quatro repetições de 50 sementes, num delineamento experimental inteiramente casualizado (DIC) em arranjo fatorial 2x6. As variáveis analisadas foram compostas pela porcentagem de emergência (EMERG), índice de velocidade de emergência (IVE), tempo médio de emergência (TME), comprimento da parte aérea (CPA), comprimento de raiz (CR), peso seco da parte aérea (PSPA) e peso seco da raiz (PSR). As maiores concentrações com 8 e 10 dS.m-1 de KCl causaram efeito negativo sobre a emergência do pinhão manso. Independente dos sais, o aumento da concentração promoveu redução crescente dos comprimentos da parte aérea e da raiz do pinhão manso. O incremento das concentrações de NaCl e KCl causaram decréscimo da matéria seca da parte aérea e da raiz, com o KCl causando maior redução. O estresse salino provocou no pinhão manso maior diminuição do crescimento e da matéria seca da parte aérea do que da raiz. &nbsp

SEROLOGICAL DETECTION OF HEPATITIS A VIRUS IN FREE-RANGING NEOTROPICAL PRIMATES (Sapajus spp., Alouatta caraya) FROM THE PARANÁ RIVER BASIN, BRAZIL

Nonhuman primates are considered as the natural hosts of Hepatitis A virus (HAV), as well as other pathogens, and can serve as natural sentinels to investigate epizootics and endemic diseases that are of public health importance. During this study, blood samples were collected from 112 Neotropical primates (NTPs) (Sapajus nigritus and S. cay, n = 75; Alouatta caraya, n = 37) trap-captured at the Paraná River basin, Brazil, located between the States of Paraná and Mato Grosso do Sul. Anti-HAV IgG antibodies were detected in 4.5% (5/112) of NTPs, specifically in 6.7% (5/75) of Sapajus spp. and 0% (0/37) of A. caraya. In addition, all samples were negative for the presence of IgM anti-HAV antibodies. These results suggest that free-ranging NTPs were exposed to HAV within the geographical regions evaluated

SEROLOGICAL DETECTION OF HEPATITIS A VIRUS IN FREE-RANGING NEOTROPICAL PRIMATES (Sapajus spp., Alouatta caraya) FROM THE PARANÁ RIVER BASIN, BRAZIL

Nonhuman primates are considered as the natural hosts of Hepatitis A virus (HAV), as well as other pathogens, and can serve as natural sentinels to investigate epizootics and endemic diseases that are of public health importance. During this study, blood samples were collected from 112 Neotropical primates (NTPs) (Sapajus nigritus and S. cay, n = 75; Alouatta caraya, n = 37) trap-captured at the Paraná River basin, Brazil, located between the States of Paraná and Mato Grosso do Sul. Anti-HAV IgG antibodies were detected in 4.5% (5/112) of NTPs, specifically in 6.7% (5/75) of Sapajus spp. and 0% (0/37) of A. caraya. In addition, all samples were negative for the presence of IgM anti-HAV antibodies. These results suggest that free-ranging NTPs were exposed to HAV within the geographical regions evaluated

Standard germination test in physic nut (Jatropha curcas L.) seeds

Defining adequate methods to assess seed germination is important to control the quality of commercial lots, especially for species that are not yet included in the Rules for Seed Testing. This study aimed to establish an adequate procedure for germination test in physic nut seeds (J. curcas L.). Three seed lots, in eight replications of 25 seeds each, were sown on paper towel rolls moistened with a water volume equivalent to 2.7 the weight of the dry paper and in sterilized sand moistened up to 60% of its water-holding capacity. The seeds of each treatment were maintained on germination chambers at temperatures of 20, 25, 30 and 20-30 ºC. Daily counts were made to define the ideal date to perform the first and the last count test. Criteria for classifying seedlings as normal and abnormal were also established. The experiment was conducted in a completely randomized design in a split plot arrangement, and the means were compared by Tukey's test (P<0.05). For maximum germination potential of physic nut seeds, the germination test should be conducted at 25 ºC and 30 ºC, using sand or paper towel as a substrate, with the counts at 7 and 12 days after sowing