ABSTRACT: In vitro techniques, with the purpose of conserving the genetic resources of plants, are fundamental to the feasibility of establishing germplasm banks and enabling the commercial production of micropropagated plants. The aim of this study was to evaluate the use of different spectra of light in in vitro germplasm conservation by slow grown storage of Heliconia Champneiana cv. Splash. Explants of heliconia in vitro were submitted to the following light treatments: CW (control white), B100 (100 % blue), R100 (100 % red) and R70B30 (70 % red/30 % blue), all with PFD = 25 μmol m2 s–1, maintained in vitro for two time periods, namely P1, 6 weeks and P2, twelve weeks, and were statistically evaluated after each interval with respect to: height, fresh weight, number and length of roots, number of leaves, and pseudostem diameter, in addition to the rate of acclimatization in percentage terms. Treatment B100 presented the lowest level of development in the two periods, and 100 % survival in acclimatization.

Resumo Este artigo se concentra em discutir a especificidade e as consequências decorrentes da adoção de processos participativos na arquitetura e em intervenção urbana, os quais são entendidos aqui como as propostas que têm como ponto inicial a partilha das atividades da produção em arquitetura com o usuário. Busca-se saber se tais processos promovem, de fato, a produção de um espaço menos determinista em relação ao seu uso, a emancipação dos sujeitos e o estímulo ao sentimento de pertencimento. Com essa intenção, analisam-se, especificamente, as experiências das intervenções urbanas “O lixo não existe”, propostas pelo coletivo Basurama e realizadas em São Paulo no período de 2012-2014. Essa análise é fundamentada nas entrevistas feitas com um dos membros do coletivo e de uma participante. Para tanto, procede-se a um cruzamento entre a concepção de emancipação/dissenso de Jacques Rancière e da ética do bem-dizer da psicanálise de Jacques Lacan.

Abstract This paper seeks to understand the specificity and consequences resulting from the adoption of participatory processes in architecture and urban intervention. Participatory processes are understood, here, as proposals that have, as their starting point, sharing the activities of architectural work with the user. We asked if such processes in fact promote the production of a less deterministic space in relation to its use and the emancipation of the individual, and support a sense of belonging. With this intention we analyzed, specifically, the experiences of urban interventions “O Lixo não existe”, proposed by the collective Basurama. These interventions were held in São Paulo during the period 2012-2014 and the analysis will be based on interviews with one of the collective’s members and a participant. To this end, we will seek to draw a parallel between the conception of emancipation/dissent of Jacques Rancière and the psychoanalytic ethics of Jacques Lacan.