Reguladores vegetais na pós-colheita das uvas 'Itália' do sistema de produção convencional e 'Niagara Rosada' do sistema orgânico

Abstract

The grape is a fruit that must be harvested when mature, because it is considered in function of the respiratory pattern, as non-climacteric, which does not mature in the post-harvest. The fruit after harvesting has been observed differently in recent years due to the increase in consumption, mainly for quality, which is one of the most demanded by consumers when acquiring the product in the market. The objective of this work was to evaluate the use of some plant regulators in the post-harvest of ‘Itália’ table grape produced in conventional vineyard and organic 'Niagara rosada'; The grapes were purchased in a commercial vineyard located in the city of Caçapava do Sul / RS. The evaluations of the grape 'Itália' on day zero, after 7 and 14 days. And 'pink Niagara' were performed on day zero (experiment setup), after 3, 6 and 9 days, both were stored at 16 ° C, simulating the market refrigeration; Followed by 5 treatments with 4 replicates, being: Treatment 1: Control (distilled water); Treatment 2: 1000 ppm salicylic acid; Treatment 3: 1000 ppb 1-methylcyclopropene (1-MCP); Treatment 4: 1000 mpp of gibberellic acid and; Treatment 5: 1000 mpp ethylene; evaluating the total soluble solids variables, total titratable acidity, '' Ratio '', fresh mass of the bunch, darkening index of the stink, dehydration of the stink and emptying of the grapes of the bunches. During the evaluation of the results it was observed that the use of 1-methylcyclopropene (1-MCP) in 'Itália' grape for postharvest treatment reduced the dehydration speed of the stored bunches for 7 days, thus extending the shelf life of the fruit on the shelf of commerce.