The action of 8-hydroxyquinoline and chlorine in the durability of the postharvest torch ginger variety Red Torch

Abstract

It had as objective to evaluate the effect of 8-hydroxyquinoline and chlorine, isolated and mixed in and conservation of the stem stick of the emperor. Twenty of the stem torch ginger (Etlingera elatior), variety Red Torch were harvested, transported, and immersed in standardized solutions containing biocides for 48 hours. The biocide used were 100 mg L -1 of chlorine; 250 mg L -1 of 8-(HQC); 500 mg L -1 of 8-(HQC) and 50 mg L -1 of chlorine + 50 mg L -1 of 8-(HQC), the control corresponded to water. The stems stay immersed in water for nine days at 20 ± 4 ºC. Every 24 hours, the water in the container was replaced. During nine days, some measurements were realized of pH of the water in which the stems stay immersed, in the same way, it was measured the consumption/loss volume of the water for each 24 hours in the containers. The stems were weighed and also samples were taken from the base of the stems and pear ligule determination of peroxidase activity. In general, the use of solutions of 8-(HQC), 250 and 500 mg L -1 , make easier the flux of water in the vases, measured by the consumption of water; provided lower peroxidase activity at the base, independent of the pH of the solution and maintained lower peroxidase activities in the ligule. Thus, with the results obtained, it demonstrated promise the use of 8-(HQC), in the highest concentrations tested (250 and 500 mg L -1 ) for quality maintenance of cut stems of Etlingera elatior, variety Red Torch.

Postharvest life of cut chrysanthemum flowers as affected by citric acid, boric acid and salicylic acid

“…Postharvest senescence may be due to several factors, such as reactive oxygen species (ROS), presenting as discoloration and petal curvature (Trippi and Paulin, 1984). Many studies involving antioxidant properties were carried out with the aim of increasing longevity of the flowers (Reviewed by Amorim et al, 2017;Panavas and Rubinstein, 1998;Vaslier and Van Doorn, 2003;Gerailoo and Ghasemnezhad, 2011;Fan et al, 2015;Vieira et al, 2016;Fonseca et al, 2017).…”

Boric acid as a potential substitute for conventional ethylene antagonists in mitigating postharvest flower senescence of Digitalis purpurea

“…Plant cells are generally protected against ROS produced during oxidative stress by an antioxidant enzyme system such as SOD, CAT and APX activity (Li et al, 2020). A number of experiments concerning antioxidant properties have been conducted in order to increase the longevity of flowers (Fonseca et al, 2017). The flower senescence is governed by the interplay of several growth regulators viz.…”