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X-ray fluorescence spectroscopy (XRF) applied to plant science: challenges towards in vivo analysis of plants

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Abstract

X-ray fluorescence spectroscopy (XRF) is an analytical tool used to determine the elemental composition in a myriad of sample matrices. Due to the XRF non-destructive feature, this technique may allow time-resolved plant tissue analyses under in vivo conditions, and additionally, the combination with other non-destructive techniques. In this study, we employed handheld and benchtop XRF to evaluate the elemental distribution changes in living plant tissues exposed to X-rays, as well as real-time uptake kinetics of Zn(aq) and Mn(aq) in soybean (Glycine max (L.) Merrill) stem and leaves, for 48 hours, combined with transpiration rate assessment on leaves by an infrared gas analyzer (IRGA). We found higher Zn content than Mn in stems. The latter micronutrient, in turn, presented higher concentration in leaf veins. Besides, both micronutrients were more concentrated in the first trifolium (i.e., youngest leaf) of soybean plants. Moreover, the transpiration rate was more influenced by circadian cycles than Zn and Mn uptake. Thus, XRF represents a convenient tool for in vivo nutritional studies in plants, and it can be coupled successfully to other analytical techniques.

Graphical abstract: X-ray fluorescence spectroscopy (XRF) applied to plant science: challenges towards in vivo analysis of plants

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Publication details

The article was received on 23 Sep 2019, accepted on 21 Nov 2019 and first published on 22 Nov 2019


Article type: Paper
DOI: 10.1039/C9MT00237E
Metallomics, 2020, Advance Article

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    X-ray fluorescence spectroscopy (XRF) applied to plant science: challenges towards in vivo analysis of plants

    G. S. Montanha, E. S. Rodrigues, J. P. R. Marques, E. de Almeida, A. R. dos Reis and H. W. Pereira de Carvalho, Metallomics, 2020, Advance Article , DOI: 10.1039/C9MT00237E

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