Experimental evidence of two mechanisms coupling leaf-level C assimilation to rhizosphere CO 2 release

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Standard

Experimental evidence of two mechanisms coupling leaf-level C assimilation to rhizosphere CO 2 release. / Kayler, Zachary; Keitel, Claudia; Jansen, Kirstin et al.
in: Environmental and Experimental Botany, Jahrgang 135, 01.03.2017, S. 21-26.

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Harvard

APA

Vancouver

Bibtex

@article{cd523d0863214e5687a91b91d1348f65,
title = "Experimental evidence of two mechanisms coupling leaf-level C assimilation to rhizosphere CO 2 release",
abstract = "The time span needed for carbon fixed by plants to induce belowground responses of root and rhizosphere microbial metabolic processing is of high importance for quantifying the coupling between plant canopy physiology and soil biogeochemistry, but recent observations of a rapid link cannot be explained by new assimilate transport by phloem mass flow alone. We performed 13CO2 labeling experiments designed to test if belowground respiration response to photosynthesis is faster than the arrival of new assimilates and to shed light on potential mechanisms. We provide experimental evidence that at least two mechanisms are employed by plants to couple rhizosphere respiration to canopy assimilation. We observed a fast increase of belowground respiration with the onset of photosynthesis, which we assume is induced by pressure concentration waves travelling through the phloem. A second, much later occurring, peak in respiration is fueled by new assimilates labeled with 13C. Plants and the rhizosphere are thus more tightly coupled than previously thought. Ultimately, the addition of a faster assimilate delivery mechanism to our conceptual framework of ecosystem dynamics will lead to a better understanding of belowground carbon and nutrient cycling and subsequent ecosystem response to disturbance and environmental stress.",
keywords = "Biology, speed of link, phloem transport, soil respiration, pressure concentration wave, carbon isotope, rhizosphere",
author = "Zachary Kayler and Claudia Keitel and Kirstin Jansen and Arthur Gessler",
year = "2017",
month = mar,
day = "1",
doi = "10.1016/j.envexpbot.2016.12.002",
language = "English",
volume = "135",
pages = "21--26",
journal = "Environmental and Experimental Botany",
issn = "0098-8472",
publisher = "Elsevier B.V.",

}

RIS

TY - JOUR

T1 - Experimental evidence of two mechanisms coupling leaf-level C assimilation to rhizosphere CO 2 release

AU - Kayler, Zachary

AU - Keitel, Claudia

AU - Jansen, Kirstin

AU - Gessler, Arthur

PY - 2017/3/1

Y1 - 2017/3/1

N2 - The time span needed for carbon fixed by plants to induce belowground responses of root and rhizosphere microbial metabolic processing is of high importance for quantifying the coupling between plant canopy physiology and soil biogeochemistry, but recent observations of a rapid link cannot be explained by new assimilate transport by phloem mass flow alone. We performed 13CO2 labeling experiments designed to test if belowground respiration response to photosynthesis is faster than the arrival of new assimilates and to shed light on potential mechanisms. We provide experimental evidence that at least two mechanisms are employed by plants to couple rhizosphere respiration to canopy assimilation. We observed a fast increase of belowground respiration with the onset of photosynthesis, which we assume is induced by pressure concentration waves travelling through the phloem. A second, much later occurring, peak in respiration is fueled by new assimilates labeled with 13C. Plants and the rhizosphere are thus more tightly coupled than previously thought. Ultimately, the addition of a faster assimilate delivery mechanism to our conceptual framework of ecosystem dynamics will lead to a better understanding of belowground carbon and nutrient cycling and subsequent ecosystem response to disturbance and environmental stress.

AB - The time span needed for carbon fixed by plants to induce belowground responses of root and rhizosphere microbial metabolic processing is of high importance for quantifying the coupling between plant canopy physiology and soil biogeochemistry, but recent observations of a rapid link cannot be explained by new assimilate transport by phloem mass flow alone. We performed 13CO2 labeling experiments designed to test if belowground respiration response to photosynthesis is faster than the arrival of new assimilates and to shed light on potential mechanisms. We provide experimental evidence that at least two mechanisms are employed by plants to couple rhizosphere respiration to canopy assimilation. We observed a fast increase of belowground respiration with the onset of photosynthesis, which we assume is induced by pressure concentration waves travelling through the phloem. A second, much later occurring, peak in respiration is fueled by new assimilates labeled with 13C. Plants and the rhizosphere are thus more tightly coupled than previously thought. Ultimately, the addition of a faster assimilate delivery mechanism to our conceptual framework of ecosystem dynamics will lead to a better understanding of belowground carbon and nutrient cycling and subsequent ecosystem response to disturbance and environmental stress.

KW - Biology

KW - speed of link

KW - phloem transport

KW - soil respiration

KW - pressure concentration wave

KW - carbon isotope

KW - rhizosphere

U2 - 10.1016/j.envexpbot.2016.12.002

DO - 10.1016/j.envexpbot.2016.12.002

M3 - Journal articles

VL - 135

SP - 21

EP - 26

JO - Environmental and Experimental Botany

JF - Environmental and Experimental Botany

SN - 0098-8472

ER -

DOI

Zuletzt angesehen

Forschende

  1. Andreas Tietze

Publikationen

  1. Self and social identity
  2. Generation "Kautschukmann"
  3. Der Kampf um Anerkennung in Gewaltkarrieren von Mädchen
  4. Stand der Technik und fortschrittliche Ansätze in der Entsorgung des Flowback
  5. Das Unsichtbare sichtbar machen
  6. Ecosystems and People – an inclusive, interdisciplinary journal
  7. Queer Studies as Cultural Studies?
  8. Phase-field modelling for fatigue crack growth under laser shock peening-induced residual stresses
  9. Produire un espace sacré
  10. Musik/Video
  11. Modeling strategic electricity storage
  12. Datenbanken als Zitadellen des Web 2.0
  13. Jäger des verlorenen Schatzes
  14. Wer berichtet, wird besser
  15. Autonomie und Kohärenz
  16. Schöner leben
  17. Nähe und Empathie
  18. Biodegradation potential of ofloxacin and its resulting transformation products during photolytic and photocatalytic treatment
  19. Reforming unitary and federal states in Western Europe
  20. A portrait of the artist as a researcher
  21. ABC der Alternativen 2.0
  22. Verfahren zur Herstellung eines Blechkörpers aus wenigstens zwei Blechen
  23. Wilhelm Worringer (1881-1965)
  24. Verkehrswachstum und Modal Split
  25. Rekbaar en toch precies
  26. Die Reflexion von Lehrerhandeln anstoßen
  27. Kunst in Opposition zur Staatsmacht
  28. Meeting recipients' needs in dyadic cross-group helping
  29. Zur Aktualität von Erving Goffman
  30. Vergleichende Regionalismusforschung und Diffusion
  31. Zur Normalisierung von Transdisziplinarität
  32. § 60 Republik Korea (Südkorea)
  33. Ya'ar Bar'am - An old Quercus calliprinos forest of high nature conservation value in the Mediterranean region of Israel
  34. Diskussionsinhalte der 9. Hamburger Auditing Conference am 28./29.09.2011
  35. Zukunftsdenken
  36. OSZE