Journal
SCIENTIA HORTICULTURAE
Volume 226, Issue -, Pages 110-116Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scienta.2017.08.039
Keywords
Antioxidant enzyme; Brassinosteroids; Daylily flower buds; Lipid peroxidation; Plant hormone; Postharvest quality
Categories
Funding
- Chinese National Foundation of Nature and Science [31671926, 31671925]
- Special Fund for Agro-scientific Research in the Public Interest [201303088]
- PADA
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Flower buds of daylily are perishable, which limits their taste and consumer acceptability. This study aims to research the effects of 2,4-epibrassinolide (EBR) on the postharvest quality and physiological metabolism during senescence of fresh daylily flower buds during storage. The buds Were sprayed with an aqueous solution containing 0.5 mg L-1 EBR, dried for 1 h and then stored at 4 +/- 1 degrees C for 24 days. The results were as follows: EBR treatment decreased electrolyte leakage and malondialdehyde (MDA) content, suggesting maintaining the membrane integrity of daylily flower buds. EBR treatment inhibited the accumulation of H2O2 content, and increased the activity of antioxidant enzymes including superoxide dismutase, catalase, peroxidase and ascorbate peroxidase, suggesting active oxygen metabolism in the buds. EBR treatment enhanced gibberellic acid and zeatin riboside content, and reduced abscisic acid content, suggesting sustained balance of plant hormones. These results indicated that EBR treatment preserved postharvest quality including sensory quality, chlorophyll content and weight loss of daylily flower buds during storage. This study suggested that EBR treatment offers the potential to delay the senescence of stored daylily flower buds and extend their postharvest life.
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