Aline Soares Pereira

Luehea divaricata Martius et Zuccarini Is a Sensitive Species to Aluminum, Not Presenting Phytoremediation Potential

The aim of this work was to evaluate the effect of different concentrations of aluminum (Al) on physiological and biochemical parameters of Luehea divaricata seedlings grown in a hydroponic system under greenhouse conditions to verify the possible tolerance to Al or phytoremediation potential of this species. Seeds of Luehea divaricata were placed to germinate in commercial substrate and after 30 days the seedlings were transferred to a hydroponic system with a complete nutrient solution, pH at 4.5±0.1, with daily adjustment. After 20 days of acclimatization, homogenous plants were selected and transferred to a new nutrient solution (without phosphorus (P) and pH at 4.5±0.1) with different concentrations of Al: 0, 25, 50, 75 and 100 mg L -1 , each treatment being composed of 10 replicates of one plant each. The experiment was conducted in a completely randomized design. After seven days of exposure to the treatments, plants were collected for physiological and biochemical analyzes. Aluminum promoted a significant reduction in fresh and dry weight of roots, stems and leaves; in plant height; leaf number; leaf area; and pigment content. On the other hand, Al promoted an increase in lipid peroxidation and guaiacol peroxidase enzyme activity. Therefore, the presence of Al in the growth medium, for the studied conditions, altered significantly both physiological and biochemical parameters in Luehea divaricata seedlings, presenting a sensitive behavior to this element. Due to these characteristics, the studied species does not show phytoremediation potential.

ANÁLISE DA MUDANÇA ORGANIZACIONAL DE UMA EMPRESA FUMAGEIRA SEGUNDO A PERCEPÇÃO DA LIDERANÇA: UM ESTUDO DE CASO

A pesquisa teve como objetivo analisar a implementacao das mudancas no processo produtivo de uma empresa fumageira, tendo como base a excelencia empresarial. A escolha do tema para a realizacao deste trabalho foi baseada na importância de compreender como a lideranca que esta envolvida no processo de mudanca organizacional, se posiciona frente as mudancas que influenciam a maneira de realizar suas atividades de rotina, a qualidade de vida e o clima organizacional. O processo produtivo da empresa “X” passou por uma transformacao profunda, com a finalidade de torna-la mais competitiva no seu mercado de atuacao. A pesquisa busca identificar os aspectos percebidos nessa mudanca, baseando-se na percepcao da alta direcao da empresa. Os criterios e fundamentos do modelo de excelencia da Fundacao Nacional da Qualidade – FNQ foram utilizados para levantar os dados referentes a percepcao dos colaboradores da empresa. O alinhamento da pesquisa aos criterios da FNQ e importante, pois a organizacao que segue os conceitos do programa e considerada referencial de excelencia. Apos a analise dos dados, foram identificados aspectos de melhoria e outros que ainda precisam ser incrementados.