Factors Associated with Post-Traumatic Growth during the COVID-19 Pandemic: A Systematic Review.

The COVID-19 pandemic was an unprecedented event that further stimulated the debate on the concept of trauma. To increase knowledge about the traumatic potential of the pandemic, the main objective of this study was to identify, through a systematic literature review, the main factors associated with the adaptive outcome of post-traumatic growth caused by COVID-19. Studies were selected from the PsychInfo, Embase, and PubMed databases, and 29 articles were included at the end of the screening process. The identified factors are of different natures, including personal variables such as personality traits, coping, and cognitive strategies used to face adversity, and interpersonal variables, one of the most important of which is the level of social support. In addition, several results confirmed a relationship between post-traumatic growth and post-traumatic stress symptoms, as well as indices related to psychological well-being. Finally, the results are discussed by comparing them with those already present in the literature, as well as with some of the main explanatory models of post-traumatic growth. In this regard, some of the factors identified, such as maladaptive coping, avoidance symptoms, optimism, and low-stress tolerance, suggest the possibility that the process of post-traumatic growth may also be characterized by an illusory dimension.

Clonal bamboo production based on in vitro culture / Produção de plantas clonais de bambu a partir do cultivo in vitro

Bamboo species are an alternative for the composition of forest plantations. However, their potential has not been explored due to the hard time in producing large-scale clonal plants. Thus, the aim this work was to evaluate the in vitro establishment, bud multiplication and ex vitro rooting of Bambusa vulgaris. The first experiment tested different systemic and contact fungicide solutions, based on exposure time, during the establishment phase. Established explants were subjected to evaluation of residual fungicide effect on subcultures during the multiplication and elongation phases. The second experiment evaluated the influence of activated carbon on ex vitro survival and on adventitious rooting. Explant immersion in liquid culture medium added with 1.0 mL of fungicide for 120 hours has favored the in vitro establishment and reduced fungal contamination. On the other hand, it favored the shoot emission of shoots per explant during the multiplication phase. Both rooting induction culture medium and mini-incubator system use were effective in enabling adventitious root formation. The presence of activated carbon in the rooting induction culture medium resulted in a higher clonal plant survival rate.

As espécies de bambus são uma alternativa para a composição de plantios florestais. Entretanto, esse potencial não tem sido explorado devido à dificuldade de produção de mudas clonais em larga escala. Assim, objetivo deste trabalho foi avaliar o estabelecimento in vitro, a multiplicação e o enraizamento ex vitro de Bambusa vulgaris. No primeiro experimento foram testadas diferentes soluções de fungicida sistêmico e de contato em relação ao tempo de exposição durante a fase de estabelecimento. Os explantes estabelecidos foram avaliados quanto ao efeito residual do fungicida durante subcultivos nas fases de multiplicação e alongamento. No segundo experimento, foi avaliada a influência do carvão ativado sobre a sobrevivência e enraizamento ex vitro. Durante o estabelecimento in vitro, a imersão de explantes em meio de cultura líquido contendo alíquota de 1,0 mL de fungicida durante 120 horas favoreceu o estabelecimento e reduziu a contaminação fúngica, enquanto na fase de multiplicação, houve o favorecimento da emissão de brotos por explante. O meio de cultura de indução ao enraizamento e uso de sistema de mini-estufim foram efetivos para a formação de raízes adventícias e a presença de carvão ativado resultou em uma maior sobrevivência das mudas clonais.