Sugarcane is a unique crop with the ability to accumulate high levels of sugar and is a commercially viable source of biomass for bioelectricity and second-generation bioethanol. Water deficit is the single largest abiotic stress affecting sugarcane productivity and the development of water use efficient and drought tolerant cultivars is an imperative for all major sugarcane producing countries. This review summarizes the physiological and molecular studies on water deficit stress in sugarcane, with the aim to help formulate more effective research strategies for advancing our knowledge on genes and mechanisms underpinning plant response to water stress. We also overview transgenic studies in sugarcane, with an emphasis on the potential strategies to develop superior sugarcane varieties that improve crop productivity in drought-prone environments.
Pig farming is a significant economic activity in the food industry and the meat trade. However, pig slaughterhouses release their waste through effluents, which may spread pathogenic microorganisms and degrade the environment, particularly in bodies of water. The aim of the present study was to assess the efficiency of the Australian wastewater treatment system and the quality of the Effluent Treatment Station (ETS) of a pig slaughterhouse, which flows into the Laranja Azeda stream in the city of Dourados (State of Mato Grosso do Sul, Brazil). Effluentsampling was carried out in the ETS using treatment ponds (Australian system), from the input to the output, over a period of one year. Physicochemical and biological parameters were assessed to measure the effluentquality. The results showed a reduction in organic matter and microorganisms. The concentration of dissolved oxygen, pH, effluent temperature, redox potential, as well as the amount of coliforms, exhibited a significant reduction (p<0.005). The waste management brought by the ETS promoted the removal of pollutants from the effluent. However, these procedures were not enough to satisfy Brazilian and international parameters proposed by the WHO, which regulate the dumping of waste into water bodies.
Ao professor Marcelo Menossi por me receber em seu laboratório, acreditar no meu potencial e ter aceito me supervisionar como seu aluno de doutorado. Eu sou imensamente grato pelas discussões, direcionamentos e, acima de tudo, por sua contribuição no meu processo de amadurecimento como cientista. Aos colegas doLaboratório de Genoma Funcional por criarem um ambiente propício para que minha personalidade profissional fosse aprimorada. Nesse quesito, gostaria de agradecer especialmente ao Valter, Thais e Isabella. Agradeço também ao Denis, Ana Laura, Camila Cunha, José Sérgio e Daniel Ramiro pelas contribuições teóricas e metodológicas na execução desse projeto. Ao Rapha Mattos e Sahra Uygun pelo auxilio com as análises de bioinformática e aos técnicos de laboratório Pedro e Wilson por atuarem como facilitadores dos experimentos. Aos amigos da Rep. Regina, João, Ana, Raquel, Pava, Cris e Pedro que me acolheram assim que cheguei em Campinas e pude chamar de família. Aos amigos Valter, Isabella, Ana Laura, Aline, Denis, Thais, Giane e Vanessa pelos laços afetivos que foram além do laboratório. Ao Fabiano Borba pela amizade de longa data, por me guiar pelo caminho seguro, por entender minha ausência e valorizar o meu melhor. Ao André pela força dada a cada etapa e, também, pelo ombro nas desilusões. Por se manter próximo na distância e, principalmente, por sonhar comigo. Obrigado por compartilhar aquilo que realmente é essencial.A minha família por apoiar meus sonhos. Obrigado pai, mãe, irmã e irmão.
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