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首页> 外文期刊>Rice >Effects of different Fe supplies on mineral partitioning and remobilization during the reproductive development of rice (Oryza sativa L.)
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Effects of different Fe supplies on mineral partitioning and remobilization during the reproductive development of rice (Oryza sativa L.)

机译：不同铁元素供应对水稻生殖发育过程中矿物质分配和迁移的影响

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Background Minimal information exists on whole-plant dynamics of mineral flow through rice plants and on the source tissues responsible for mineral export to developing seeds. Understanding these phenomena in a model plant could help in the development of nutritionally enhanced crop cultivars. A whole-plant accumulation study, using harvests during reproductive development under different Fe supplies, was conducted to characterize mineral accumulation in roots, non-flag leaves, flag leaves, stems/sheaths, and panicles of Kitaake rice plants. Results Low Fe supply promoted higher accumulation of Zn, Cu and Ni in roots, Mn, Ca, Mg and K in leaves and Zn in stems/sheaths and a smaller accumulation of Fe, Mn and Ca in roots and Zn and Ni in leaves. HighFe supply promoted higher accumulation of Fe in roots and Zn in leaves and a smaller accumulation of Fe in leaves and stems/sheaths and Zn, Cu and K in roots. Correlation analyzes indicated that fluctuations in Mn-Ca, Zn-Cu, Zn-Ni, Cu-Ni, Mo-S, Ca-Mg, Cu-Mn and Cu-Mg concentrations in response to different Fe supplies were positively correlated in at least four of the five organs analyzed. Conclusions Mineral content loss analysis indicated that mineral remobilization from vegetative organs can occur in rice plants; however, for seeds to acquire minerals, vegetative remobilization is not absolutely required. Also, mineral remobilization from vegetative tissues in rice was greatly dependent of plant Fe nutrition. Remobilization was observed for severalminerals from flag leaves and stems/sheaths, but the amounts were generally far below the total mineral accretion observed in panicles, suggesting that continued uptake and translocation of minerals from the roots during seed fill are probably more important than mineral remobilization.
机译：背景技术关于通过水稻植物的矿物质流的全植物动力学以及负责矿物输出到发育中种子的来源组织的信息很少。了解示范植物中的这些现象可能有助于开发营养增强型作物品种。进行了整株植物蓄积研究，利用不同铁供应条件下生殖发育过程中的收成，来表征北岳水稻植株的根，无旗叶，旗叶，茎/鞘和穗中的矿物质蓄积。结果低铁供应促进了根中锌，铜，镍，叶片中锰，钙，镁和钾的较高积累，茎/鞘中锌含量的增加，根，叶中铁，锰，钙，锌和镍的积累较少。高铁的供应促进了根中铁和叶片中锌的较高积累，叶和茎/鞘中铁和根中的锌，铜和钾的积累量较小。相关分析表明，至少在不同的Fe供应下，Mn-Ca，Zn-Cu，Zn-Ni，Cu-Ni，Mo-S，Ca-Mg，Cu-Mn和Cu-Mg浓度的波动呈正相关。分析了五个器官中的四个。结论矿物质含量损失分析表明，水稻植物中可以发生营养器官的矿物质迁移。但是，对于种子获取矿物质而言，并非绝对需要进行营养复员。此外，水稻营养组织中的矿物质迁移很大程度上取决于植物的铁营养。在旗叶和茎/鞘中观察到多种矿物质的迁移，但是该量通常远低于在穗部中观察到的总矿物质吸收量，这表明种子填充过程中从根部持续吸收和转运矿物质可能比矿物质迁移更为重要。

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