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首页> 外文期刊>Plant and Soil >Synchrotron mu XRF imaging of live seedlings ofBerkheya coddiiandOdontarrhena muralisduring germination and seedling growth
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Synchrotron mu XRF imaging of live seedlings ofBerkheya coddiiandOdontarrhena muralisduring germination and seedling growth

机译：Synchrotron Mu XRF成像的现场幼苗，伯伯Keya Coddiiandodontarrhena Muralismed萌发和幼苗生长

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Aims Nickel hyperaccumulator plants require highly evolved mechanisms to avoid cellular-level toxicity to cope with the high prevailing concentrations of nickel in their seeds and seedlings. This study aimed to investigate tissue-level distribution and redistribution of Ni and other physiologically relevant elements during the germination of hyperaccumulator plants. Methods Berkheya coddiiRoessler (Asteraceae) andOdontarrhena muralis sensu latu(Waldst. & Kit.) Endl. (O. chalcidica), formerlyAlyssum murale(Waldst. & Kit.) (Brassicaceae), were germinated for several days at room temperature before using synchrotron micro X-ray Fluorescence Spectroscopy (mu XRF) to obtain high-sensitivity and high-resolution elemental images of live/hydrated plants at various stages of seed germination and seedling growth. Results The results show that fruits and seeds of both species were highly enriched in nickel. InBerkheya coddii, nickel was located in the cotyledons, the micropylar area, the seed coat, and the point of attachment of the pappus with the cypsela body. InOdontarrhena muralisseeds, nickel occurred in the cotyledons and hypocotyl. The emergence of true leaves initiates nickel and calcium redistribution within seedlings in both species. Conclusions The diversity in physiological responses to nickel inBerkheya coddiiandOdontarrhena muralisdoes not only occur at the mature stage, but is inherent to both species as seed elemental storage and tolerance mechanisms during seedling development differ.
机译：AIMS镍高沉积厂需要高度进化的机制，以避免细胞水平毒性，以应对其种子和幼苗的高普遍浓度的镍。该研究旨在在高累积厂萌发过程中调查Ni和其他生理相关元素的组织级分布和再分配。方法Berkheya Coddiiroessler（Asteraceae）andodontarrhena Muralis Sensu Latu（waldst。＆kit。）endl。 （o. chalcidica），前阿拉伯斯穆拉莱（Waldst。＆kit。）（Brassicaceae）在室温下在使用同步微X射线荧光光谱（MU XRF）之前在室温下发芽，获得高灵敏度和高分辨率元素种子萌发和幼苗生长的各个阶段的活/水合植物的图像。结果结果表明，两种物种的水果和种子高度富含镍。 inberkheya Coddii，镍位于子叶，微囊面积，种子涂层和Pappus与cypsela主体的附着点。 Inodontarrhena Muralisseeds，镍发生在子叶和下丘脑中。真实叶片的出现在两种种类的幼苗内引发镍和钙再分分配。结论对镍Inberkheya CoddiianDodontarhena Muralisdoes的生理反应的多样性不仅发生在成熟阶段，而且在幼苗开发过程中作为种子元素储存和耐受机制的固有。

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