Ultraviolet-C treatment regulates the greening process of water bamboo (Zizania latifolia) shoots during postharvest storage

文献类型： 外文期刊

第一作者： Zhao, Xuening

作者： Zhao, Xuening;Liu, Ruiling;Han, Yanchao;Niu, Ben;Chen, Huizhi;Fang, Xiangjun;Gao, Haiyan;Chen, Hangjun

作者机构：

关键词： Water bamboo shoots; Ultraviolet-C; Postharvest greening; Chlorophyll synthesis; Chloroplast development

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：6.8； 五年影响因子：7.5 ）

ISSN： 0925-5214

年卷期： 2025 年 230 卷

页码：

收录情况： SCI

摘要： Water bamboo shoots (WBS) are highly susceptible to postharvest greening when exposed to light or environmental stressors, resulting in a deterioration of their appearance, textural degradation, and abnormal chlorophyll accumulation. These alterations severely compromise their market value and consumer appeal. At present, the molecular mechanisms governing the greening process in WBS and effective mitigation strategies remain inadequately characterized. In this study, we examined the effects of Ultraviolet-C (UV-C) treatment on quality, chlorophyll synthesis and chloroplast development during greening of WBS, including whiteness, hardness, chlorophyll, activity of key enzymes in chlorophyll synthesis and expression of corresponding enzyme coding genes. UV-C treatment (especially 6.192 kJ m(-2), 16 min) demonstrated a significant ability to maintain whiteness and suppress the increase in weight loss, hardness, and chlorophyll content in WBS. UV-C treatment suppressed chlorophyll synthesis by inhibiting the expression of related genes -notably, UV-C treatment inhibited the expression of ZlCPOX and ZlPPOX genes -and reducing Coproporphyrinogen III oxidase (CPOX) and Protoporphyrinogen III oxidase (PPOX) enzyme activities, thereby limiting the conversion of Coproporphyrinogen III (Coprogen III) to Protoporphyrin IX (Proto IX). UV-C inhibited proplastid-to-chloroplast conversion and induced chloroplast degradation. UV-C treatment effectively suppresses postharvest greening in WBS by orchestrating synergistic multi-pathway regulatory mechanisms, which not only significantly enhances their visual quality but also effectively delays textural deterioration. These findings establish a solid theoretical basis for advancing lightbased preservation technologies in postharvest management of WBS.

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