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A New Rapid Micro-method for the Molecular-chemical Characterization of Rhizodeposits by Field-ionization Mass Spectrometry by Peter Leinweber; Kai-Uwe Eckhardt; Holger Fischer; Yakov Kuzyakov is a Chemistry article available to read on EtoBox.

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## Abstract Time‐consuming investigation of rhizodeposit composition by leaching, freeze‐drying of leachate, and pyrolysis‐field ionization mass spectrometry (Py‐FIMS) of solid samples was replaced by direct Py‐FIMS of a 5 μL liquid rhizodeposit sample which was evaporated overnight in the quartz tube of a mass spectrometer inlet system. Application of this new rapid technique to a set of 14 liquid rhizodeposit samples from maize (__Zea mays__ L.), leached twice with a time lag of 80 min, unequivocally showed the effect of soil texture on the chemical composition of the rhizodeposits. Irrespective of leaching time, a partial least‐squares analysis separated the Py‐FI mass spectra of the maize rhizodeposits leached from a soil from those leached from a soil + quartz sand‐mixture (prepared by addition of 50% w/w quartz sand to the original soil). The signals which had the strongest discrimination power and were significantly enriched in leachates from the soil + quartz sand were assigned to sugars, peptides and polyamines. Mass signals of putrescine and cadaverine, __a priori__ not expected in the rhizodeposits, were indicators of modified root environment and rhizosphere processes i

Who reads A New Rapid Micro-method for the Molecular-chemical Characterization of Rhizodeposits by Field-ionization Mass Spectrometry?

Author

Peter Leinweber; Kai-Uwe Eckhardt; Holger Fischer; Yakov Kuzyakov

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0951-4198)

Published

2008

Language

EN

Field

Chemistry (Physical Sciences)