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題名 | Bisulfite (HSO□) Hydroponics Induced Oxidative Stress and Its Effect on Nutrient Element Compositions in Rice Seedlings=亞硫酸氫鈉水培誘導水稻幼苗氧化脅迫並影響營養元素的組分 |
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作者姓名(中文) | 林植芳; 劉楠; 陳少微; 林桂珠; 莫輝; 彭長連; | 書刊名 | Botanical Studies |
卷期 | 52:2 2011.04[民100.04] |
頁次 | 頁173-182 |
分類號 | 434.111 |
關鍵詞 | 水稻; 亞硫酸氫鈉; 硫含量; 超氧陰離子自由基; 過氧化氫; 元素/硫比率; Bisulfite; Element/sulfur ratio; Hydrogen peroxide; Oryza sativa; Sulfur content; Superoxide radical; |
語文 | 英文(English) |
中文摘要 | 為了探明SO2的衍生物NaHSO3(HSO3–)誘致植物組織和細胞水準的氧化脅迫狀態及主要營養元素的吸收與平衡的變化,我們將水稻品種兩優培九的幼苗用加入亞硫酸氫鈉(NaHSO3) 1、2、4和5 mM的Hoagland溶液培養3天。分析其光合色素,S、P、N、C、K、Na、Ca、Mg的含量,並以組織化學和細胞化學方法定位研究活性氧H2O2和O2 • –的產生位點與數量。結果表明,經HSO3– 處理後幼苗的莖葉中S顯著積累,P、K、Na、Ca、Mg的積累較少,C、N和葉綠素含量下降。每種元素與S的比率隨HSO3– 濃度增高而降低,兩者之間呈負相關性。與此相反,根中的大多數營養元素含量均下降,導致莖葉/ 根比率升高。葉片中兩種活性氧產生的數量明顯增多,在葉表皮組織中,H2O2主要定位於氣孔的保衛細胞,附衛細胞和一些表皮細胞中,而O2• –則出現於大多數表皮細胞中。葉肉細胞中的H2O2首先出現於細胞質膜和胞壁之間的連接區,隨後因濃度增高而擴展至胞壁和葉綠體的類囊體上。 |
英文摘要 | Rice seedlings (Oryza sativa, cv. Liangyou peiju) were kept under hydroponic conditions in Hoagland solution containing sodium bisulfite (1, 2, 4 and 5 mM) for 3 days. To investigate the status of oxidative stress in tissue and cell levels in vivo, changes in the uptake/balance of main nutrient elements induced by bisulfite, as well as changes in the generation site and amount of active oxygen species O2• – and H2O2 , the contents of photosynthetic pigments and the total contents of S, P, N, C, K, Na, Ca, Mg were assayed. In shoots, bisulfite treatment resulted in a significant accumulation of sulfur and a less pronounced accumulation of P, K, Na, Ca and Mg, but a reduction in C, N and chlorophyll contents. Each element to sulfur ratio was decreased as a result of increased sulfur content, and the ratio was negatively correlated to the treated bisulfite concentration. In contrast, most of the test elements in roots decreased upon bisulfite treatment, leading to an increase in the shoot/root ratio of nutrient elements. Histochemical and cytochemical localization of the two reactive oxygen species showed that generations of O2• – and H2O2 were significantly enhanced by bisulfite in rice leaves. In epidermis tissue, H2O2 was predominantly present in guard and subsidiary stomata cells and some epidermal cells, while O2• – was found in most epidermal cells. In mesophyll cells, H2O2 occurred firstly on the plasmalemma and cell wall conjunction point, and then expanded to cell wall and even to thylakoid in chloroplasts as bisulfite concentration increased. |
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