In:
Scientific Reports, Springer Science and Business Media LLC, Vol. 10, No. 1 ( 2020-06-11)
Kurzfassung:
The release of rhizodeposits differs depending on the root position and is closely related to the assimilated carbon (C) supply. Therefore, quantifying the C partitioning over a short period may provide crucial information for clarifying root–soil carbon metabolism. A non-invasive method for visualising the translocation of recently assimilated C into the root system inside the rhizobox was established using 11 CO 2 labelling and the positron-emitting tracer imaging system. The spatial distribution of recent 11 C-photoassimilates translocated and released in the root system and soil were visualised for white lupin ( Lupinus albus ) and soybean ( Glycine max ). The inputs of the recently assimilated C in the entire root that were released into the soil were approximately 0.3%–2.9% for white lupin within 90 min and 0.9%–2.3% for soybean within 65 min, with no significant differences between the two plant species; however, the recently assimilated C of lupin was released at high concentrations in specific areas (hotspots), whereas that of soybean was released uniformly in the soil. Our method enabled the quantification of the spatial C allocations in roots and soil, which may help to elucidate the relationship between C metabolism and nutrient cycling at specific locations of the root–soil system in response to environmental conditions over relatively short periods.
Materialart:
Online-Ressource
ISSN:
2045-2322
DOI:
10.1038/s41598-020-65668-9
Sprache:
Englisch
Verlag:
Springer Science and Business Media LLC
Publikationsdatum:
2020
ZDB Id:
2615211-3
