Imaging and functional characterization of crop root systems using spectroscopic electrical impedance measurements

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*Title:*	Main Title: Imaging and functional characterization of crop root systems using spectroscopic electrical impedance measurements
*Description:*	Abstract: Background and aims Non- or minimally invasive methods are urgently needed to characterize and moni- tor crop root systems to foster progress in phenotyping and general system understanding. Electrical methods have come into focus due to their unique sensitivity to various structural and functional root characteristics. The aim of this study is to highlight imaging capabili- ties of these methods with regard to crop root systems and to investigate changes in electrical signals caused by physiological reactions. Methods Spectral electrical impedance tomography (sEIT) and electrical impedance spectroscopy (EIS) were used in three laboratory experiments to char- acterize oilseed root systems embedded in nutrient solution. Two experiments imaged the root exten- sion with sEIT, including one experiment monitoring a nutrient stress situation. In the third experiment electrical signatures were observed over the diurnal cycle using EIS. Results Root system extension was imaged using sEIT under static conditions. During continuous nutrient deprivation, electrical polarization signals decreased steadily. Systematic changes were observed over the diurnal cycle, indicating further sensitivity to asso- ciated physiological processes. Spectral parameters suggest polarization processes at the μm scale. Conclusions Electrical imaging methods are able to non-invasively characterize crop root systems in con- trolled laboratory conditions, thereby offering links to root structure and function. The methods have the potential to be upscaled to the field scale.
*Identifier:*	10.1007/s11104-018-3867-3 (DOI)
*Related Resource:*	Has Part https://link.springer.com/article/10.1007%2Fs11104-018-3867-3 (URL)

Responsible Party

*Creators:*	Maximilian Weigand (Author), Andreas Kemna (Author)
*Publisher:*	Springer International Publishing
*Publication Year:*	2019

Topic

*TR32 Topic:*	Other
*Related Subproject:*	B6
*Subjects:*	Keywords: Geophysics, EIT, Root

File Details

*Filename:*	Weigand_Kemna_2019_PS.pdf
*Data Type:*	Text - Article
*File Size:*	4.6 MB
*Date:*	Accepted: 31.10.2018
*Mime Type:*	application/pdf
*Data Format:*	PDF
*Language:*	English
*Status:*	Completed

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*Download Permission:*	Only Project Members
*General Access and Use Conditions:*	According to the TR32DB data policy agreement.
*Access Limitations:*	According to the TR32DB data policy agreement.
*Licence:*	[TR32DB] Data policy agreement

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*Publication Status:*	Published
*Review Status:*	Peer reviewed
*Publication Type:*	Article
*Article Type:*	Journal
*Source:*	Plant Soil
*Issue:*	1-2
*Volume:*	435
*Number of Pages:*	24 (201 - 224)

Metadata Details

*Metadata Creator:*	Shari van Treeck
*Metadata Created:*	12.03.2019
*Metadata Last Updated:*	12.03.2019
*Subproject:*	B6
*Funding Phase:*	3
*Metadata Language:*	English
*Metadata Version:*	V50

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