Pós-colheita de hastes florais de cártamo colhidas em diferentes épocas e submetidas a diferentes soluções conservantes

Abstract

The conservation of the cut flower stems aims to prolong durability, maintain the quality and reduce the losses after harvest, providing a greater period of lifespan and commercialization. Thus, the objective of this work was to evaluate the quality and durability in post-harvest of fresh safflower (Carthamus tinctorius L.) flower stems harvested in different times and submitted to different preservative solutions. The experiment was conducted in entirely randomized design and, organized in 4x8 (four preservative solutions and eight harvest seasons) factorial scheme, with four repetitions, and each experimental unit consisting of five floral stems. The cultivation of floral stems of safflower occurred at Floriculture Sector and the harvest seasons of them were carried out in the beginning of flowering from the sowing performed in the first seasonal half: in winter, spring and summer of 2016, autumn, winter, spring and summer of 2017 and autumn of 2018. And, the preservative solutions were: distilled water (control); distilled water + sucrose 2%; distilled water + sodium hypochlorite 2% and distilled water + sucrose 2% + sodium hypochlorite 2%. The floral stems were evaluated in relation to quality notes, dehydration and absorption of preservative solutions. We observed that the floral stems of safflower presented shelf life in average of nine days, with absorption of solution in average of 0.021 mL day-1 g-1 of fresh mass and that the use of preservatives was not beneficial to conservation in post-harvest.

Extension of the vase life of Lilium pumilum cut flowers by pulsing solution containing sucrose, citric acid and silver thiosulfate

“…However, such problems can be minimized by techniques that extend the vase life of cut flowers and, consequently, the period of commercialization, providing high-quality flowers (Zhao et al, 2018). Among these techniques, preservative solutions stand out, since they can be used throughout the production chain, from production to final consumer (Menegaes et al, 2019).…”

Post-harvest quality of safflower flower stems at different pre-cooling periods and preservative solutions

“…To check the durability of flower stems, after pre-cooling, they were placed in clear glass containers (1.2 L volume) containing 300 mL of preservative solutions (with a 7-cm water column) corresponding to the aforementioned solutions, with renewal every three days. Environmental conditions of the experimental room were maintained through air conditioning at an average temperature of 20º C and a constant average relative humidity of 65% (Menegaes et al, 2019a;.…”

“…The first is aimed at reducing respiratory activity, which is directly related to vase life. Low temperatures tend to slow down breathing, reducing the production of ethylene and, consequently, delaying the degradation of sugar reserves or other substrates, prolonging the durability of flowers and foliage in preservation environments Menegaes et al (2023) Post-harvest quality of safflower flower... (Almeida et al, 2009;Menegaes et al, 2019a;b).…”

Investigation the role of Plasma-Activated Water Washing and Storage on the Shelf Life of Cestrum nocturnum L. (Night-Blooming Jasmine) Flowers

“…substantially higher compared to NO 2 ˉ ions (1.4 mg L -1 at 30 minutes). This discrepancy is attributed to the higher stability of NO 3 ˉ in PAW compared to other dissolved species like NO 2 ˉ, H 2 O 2 , and dissolved O 3 , as indicated in equations(7)(8)(9)(10)(11) (27, 37, 43, 49, 59- …”

“…This phenomenon explains the observed rise and fall behavior in H 2 O 2 and dissolved O 3 concentrations. Initially, their concentrations increase with time, and later, they decrease due to the reactions outlined in equations(7)(8)(9)(10)(11).…”