RESUMO O objetivo do trabalho foi verificar as respostas de cultivares de manjericão à salinidade da água de irrigação, no período de 15 de janeiro a 20 de março de 2013, em casa de vegetação, na Universidade Federal Rural do Semiárido, Mossoró, RN. O delineamento experimental foi inteiramente casualizado e os tratamentos arranjados em esquema fatorial 2 x 4, relativo a duas cultivares de manjericão (Verde e Roxo) e quatro níveis de salinidade (0,5; 2,0; 3,5 e 5,0 dS m-1), com quatro repetições. As variáveis avaliadas foram diâmetro do caule e altura das plantas, número de hastes, número de folhas e área foliar, massa seca de folhas, hastes, raiz e total. O aumento da salinidade prejudicou todas as variáveis avaliadas em ambas as cultivares, mas a cultivar Roxo mostrou-se mais tolerante que a cultivar Verde; as duas cultivares são tolerantes à salinidade da água de irrigação até 1,5 dS m-1.

ABSTRACT The objective of this work was to verify the response of basil cultivars to the salinity of irrigation water during the period from January 15 to March 20, 2013, in a greenhouse, at the Federal Rural University of the Semi-Arid, Mossoró, RN, Brazil. The experimental design was completely randomized, with treatments arranged in 2 x 4 factorial scheme, constituted of two cultivars of basil (‘Verde’ and ‘Roxo’) and four levels of irrigation water salinity (0.5; 2.0; 3.5 and 5.0 dS m-1), with four replicates. The plants were collected at 65 days after transplanting and the following variables were evaluated: stem diameter; plant height; number of stems and leaves; leaf area; dry matter of leaves, stems, roots, and total dry matter. The increase in salinity was detrimental to all variables evaluated in both cultivars, but the cultivar ‘Roxo’ proved to be more tolerant than the cultivar ‘Verde’. Both cultivars are tolerant to irrigation water salinity of up to 1.5 dS m-1.

Este estudo teve como objetivo avaliar a variação entre e dentro de procedências de candeia (Eremanthus erythropappus) para resposta à inoculação com fungos micorrízicos. Foram coletadas sementes de seis matrizes localizadas em duas procedências do sul do Estado de Minas Gerais (três de São Tomé das Letras e três de Carrancas) e, dessas, produzidas mudas que foram arranjadas em parcela subdividida com quatro blocos casualizados, cujas parcelas constituíram os tratamentos com e sem inoculação micorrízica, e a subparcela, o genótipo. Do primeiro ao oitavo mês após a repicagem para tubetes, foram coletados os dados de altura, diâmetro e taxa de sobrevivência das mudas no viveiro. Constatou-se que há variações para a característica altura entre as duas procedências, entre os tratamentos de inoculação e para a interação procedência inoculação. Apurou-se ainda que não há diferenças significativas entre as progênies mas, sim, diferença para o tratamento de inoculação com micorriza, somente para a característica altura.

This study had the objective to estimate the variations among and within origins of candeia (Eremanthus erythropappus) in response to inoculation with mycorrhizal fungi. Open-pollinated seeds were collected from six matrix trees of two distinct populations: São Tomé das Letras and Carrancas, in the States of Minas Gerais, Brazil. The seedlings produced were arranged in split plot in four randomized blocks, where the split plots constituted of treatments with or without mycorrhizal inoculation and the plot which the genotype. From the first to the eighth month after transfering seedlings into containers the data related to height, diameter and survival rate of seedlings in the nursery were collected. In the analysis of variance, there were variations for height characteristic between the two origins, among the inoculation treatments and for the interaction origin inoculation. The analysis among the progenies showed that there were no significant differences among origins, but differences were observed for the inoculation treatment with regard to the height characteristic.

The hemolytic activity of live isolates and clones of Trichomonas vaginalis and Tritrichomonas foetus was investigated. The isolates were tested against human erythrocytes. No hemolytic activity was detected by the isolates of T. foetus. Whereas the isolates of T. vaginalis lysed erythrocytes from all human blood groups. No hemolysin released by the parasites could be detected. Our preliminary results suggest that hemolysis depend on the susceptibility of red cell membranes to destabilization and the intervention of cell surface receptors as a mechanism of the hemolytic activity. The mechanism could be subject to strain-species-genera specific variation of trichomonads. The hemolytic activity of T. vaginalis is not due to a hemolysin or to a product of its metabolism. Pretreatment of trichomonads with concanavalin A reduced levels of hemolysis by 40%.