Influência do 1-MCP na conservação pós-colheita de rosas cv. Vega

Abstract

RESUMOObjetivou-se, neste trabalho, estudar aspectos da fisiologia pós-colheita de rosas cortadas cv. Vega, tratadas com diferentes concentrações de 1-metilcicloropropeno (1-MCP). O experimento foi conduzido em delineamento inteiramente casualizado, em esquema fatorial composto por dois fatores: quatro tratamentos pós-colheita e quatro datas de avaliação (0; 4; 8; 12 dias). As flores foram submetidas aos seguintes tratamentos: 1) Água destilada (controle); 2) 1-MCP (100 ppb); 3) 1-MCP (250 ppb); 4) 1-MCP (500 ppb). Foram realizadas as seguintes avaliações: massa fresca, cor, turgescência, curvatura, taxa respiratória, conteúdo relativo de água, conteúdo de carboidratos solúveis, de redutores e de antocianina. Ao contrário do tratamento controle, todas as concentrações de 1-MCP foram eficientes para retardar a senescência das flores, porém, a concentração de 1-MCP a 500 ppb destacou-se pela melhor manutenção da qualidade, além de prolongar a vida decorativa das hastes até 19 dias. Termos para indexação:Rosa sp, flor de corte, inibidor de etileno. ABSTRACTThe objective of this work was to study aspects of postharvest physiology of cut roses cv. Vega, treated with different concentrations of 1-metilcloropropene (1-MCP). The experiment was conducted in a complete randomized design composed of two factors: four postharvest treatments and four dates of evaluation (0; 4; 8; 12 days). The following treatments were used: 1) distilled water; 2) 1-metilciclopropeno (1-MCP) 100 ppb; 3) 1-MCP 250 ppb; 4) 1-MCP 500 ppb. The following evaluations were made: fresh weight, color, turgor, curvature, respiration rate, relative water content, content of soluble carbohydrates, reducing and anthocyanin. Unlike treatment with distilled water, all concentrations of 1-MCP were effective in delaying the senescence of flowers; however, the concentration of 1-MCP at 500 ppb was highlighted by better maintenance of quality and extended decorate life stem up to 19 days.

Postharvest Quality of Feijoa Flowers Treated With Different Preservative Solutions and 1-Methylcyclopropene

“…In roses cv. Vega, 1-MCP at 500 nL L -1 prolonged the red color of the petals and shelf life of the flowers for up to 19 days (PIETRO et al 2010). Color change of the petals in flowers is affected by the presence of either endogenous or exogenous ethylene.…”

“…Shelf life of flowers can be extended by providing sugars (to replace carbohydrates consumed by the respiration) (ELHINDI, 2012), by refrigeration (to reduce physiological activity of tissues and pathogen development, consequently prolonging storage period) (MATTIUS et al, 2010), or by treatment with 1-methylcyclopropene (1-MCP, an inhibitor of ethylene action) (PIETRO et al, 2010).…”

“…Postharvest treatments with 1-MCP (PIETRO et al, 2010;KOU et al, 2012;BURANA et al, 2014), sucrose (SANGALLI et al, 2007;MONERUZZAMAN et al, 2010), ascorbic acid (SANGALLI et al, 2007) and salicylic acid (HATAMZADEH et al, 2012;BAHRAMI et al, 2013) have been applied to extend shelf life of cut flowers. However, as far as we know, there are no reports concerning the evaluation of such treatments to preserve feijoa flowers after harvest.…”

Biological nitrogen fixation in soybean under water restriction and exposed to 1-methylcyclopropene

“…However, despite some works on cotton, flowers, and fruits (Serek et al, 2006;De Pietro et al, 2010;Chen et al, 2015;Li et al, 2016), there is no knowledge of researches on the effect of 1-MCP on soybean, aiming to the attenuate negative effects of ethylene induced by drought stress on plant senescence, including nodules. This strategy could help plants to cope with periods under water restriction and reduce the negative effects on BNF.…”

“…It acts as an inhibitor of ethylene action, resulting in a delay of the maturation process (Li et al, 2016). Similarly, 1-MCP is also employed to increase the shelf life of flowers after harvesting; the treatment with 1-MCP, for example, delayed the senescence of roses in 19 days (De Pietro et al, 2010).…”