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Endogenous Hydrogen Sulfide Homeostasis Is Responsible for the Alleviation of Senescence of Postharvest Daylily Flower via Increasing Antioxidant Capacity and Maintained Energy Status

文献类型： 外文期刊

作者： Liu, Dan 1 ; Xu, Sheng 2 ; Hu, Huali 4 ; Pan, Jincheng 1 ; Li, Pengxia 4 ; Shen, Wenbiao 1 ;

作者机构： 1.Nanjing Agr Univ, Lab Ctr Life Sci, Coll Life Sci, Nanjing 210095, Jiangsu, Peoples R China

2.Inst Bot, Nanjing 210014, Jiangsu, Peoples R China

3.Chinese Acad Sci, Nanjing 210014, Peoples R China

4.Jiangsu Acad Agr Sci, Inst Agr Prod Proc, Nanjing 210014, Peoples R China

关键词： daylily;endogenous hydrogen sulfide homeostasis;senescence;antioxidant capacity;energy status

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

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收录情况： SCI

摘要： 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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