期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 65, 期 4, 页码 718-726出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b04389
关键词
daylily; endogenous hydrogen sulfide homeostasis; senescence; antioxidant capacity; energy status
资金
- Jiangsu Independent Innovation Fund for Agricultural Science and Technology [CX(16)1022]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (RAPD)
There are limited data concerning the role of endogenous H2S in prolonging the postharvest of vegetables and fruits. Using a fluorescence microscope with a specific probe, we discovered that, during the senescence of postharvest daylily flower, endogenous H2S homeostasis was impaired. The activities of two important synthetic enzymes of H2S, and D-cysteine desulfhydrase, exhibited decreasing tendencies. However, NaHS (a H2S donor) not only blocked the decreased H2S production but also extended the postharvest life of daylilies. These beneficial roles were verified by the alleviation of lipid peroxidation and the increased activities of antioxidant enzymes. Meanwhile, the energy status was sustained, and the respiration rate was decreased. In contrast to NaHS, the addition of an inhibitor of H2S synthesis alone aggravated lipid peroxidation and lowered energy charge. Together, the present study implies that endogenous H2S alleviates senescence of postharvest daylilies via increasing antioxidant capacity and maintained energy status.
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