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Phosphorus addition increased carbon partitioning to autotrophic respiration but not to biomass production in an experiment with Zea mays

Ven, Arne LU ; Verlinden, Melanie S. ; Fransen, Erik ; Olsson, Pål Axel LU ; Verbruggen, Erik ; Wallander, Håkan LU and Vicca, Sara (2020) In Plant Cell and Environment 43(9). p.2054-2065
Abstract

Plant carbon (C) partitioning—the relative use of photosynthates for biomass production, respiration, and other plant functions—is a key but poorly understood ecosystem process. In an experiment with Zea mays, with or without arbuscular mycorrhizal fungi (AMF), we investigated the effect of phosphorus (P) fertilization and AMF on plant C partitioning. Based on earlier studies, we expected C partitioning to biomass production (i.e., biomass production efficiency; BPE) to increase with increasing P addition due to reduced C partitioning to AMF. However, although plant growth was clearly stimulated by P addition, BPE did not increase. Instead, C partitioning to autotrophic respiration increased. These results contrasted with our... (More)

Plant carbon (C) partitioning—the relative use of photosynthates for biomass production, respiration, and other plant functions—is a key but poorly understood ecosystem process. In an experiment with Zea mays, with or without arbuscular mycorrhizal fungi (AMF), we investigated the effect of phosphorus (P) fertilization and AMF on plant C partitioning. Based on earlier studies, we expected C partitioning to biomass production (i.e., biomass production efficiency; BPE) to increase with increasing P addition due to reduced C partitioning to AMF. However, although plant growth was clearly stimulated by P addition, BPE did not increase. Instead, C partitioning to autotrophic respiration increased. These results contrasted with our expectations and with a previous experiment in the same set-up where P addition increased BPE while no effect on autotropic respiration was found. The comparison of both experiments suggests a key role for AMF in explaining these contrasts. Whereas in the previous experiment substantial C partitioning to AMF reduced BPE under low P, in the current experiment, C partitioning to AMF was too low to directly influence BPE. Our results illustrate the complex influence of nutrient availability and mycorrhizal symbiosis on plant C partitioning.

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organization
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type
Contribution to journal
publication status
published
subject
keywords
arbuscular mycorrhizal fungi, autotrophic respiration, biomass production efficiency, carbon allocation, carbon balance, carbon partitioning, carbon use efficiency, phosphorus
in
Plant Cell and Environment
volume
43
issue
9
pages
12 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:85085700650
  • pmid:32400909
ISSN
0140-7791
DOI
10.1111/pce.13785
language
English
LU publication?
yes
id
965c7344-c82b-4a1d-b279-2443bd26056c
date added to LUP
2020-06-15 11:20:04
date last changed
2021-01-06 08:15:35
@article{965c7344-c82b-4a1d-b279-2443bd26056c,
  abstract     = {<p>Plant carbon (C) partitioning—the relative use of photosynthates for biomass production, respiration, and other plant functions—is a key but poorly understood ecosystem process. In an experiment with Zea mays, with or without arbuscular mycorrhizal fungi (AMF), we investigated the effect of phosphorus (P) fertilization and AMF on plant C partitioning. Based on earlier studies, we expected C partitioning to biomass production (i.e., biomass production efficiency; BPE) to increase with increasing P addition due to reduced C partitioning to AMF. However, although plant growth was clearly stimulated by P addition, BPE did not increase. Instead, C partitioning to autotrophic respiration increased. These results contrasted with our expectations and with a previous experiment in the same set-up where P addition increased BPE while no effect on autotropic respiration was found. The comparison of both experiments suggests a key role for AMF in explaining these contrasts. Whereas in the previous experiment substantial C partitioning to AMF reduced BPE under low P, in the current experiment, C partitioning to AMF was too low to directly influence BPE. Our results illustrate the complex influence of nutrient availability and mycorrhizal symbiosis on plant C partitioning.</p>},
  author       = {Ven, Arne and Verlinden, Melanie S. and Fransen, Erik and Olsson, Pål Axel and Verbruggen, Erik and Wallander, Håkan and Vicca, Sara},
  issn         = {0140-7791},
  language     = {eng},
  number       = {9},
  pages        = {2054--2065},
  publisher    = {Wiley-Blackwell},
  series       = {Plant Cell and Environment},
  title        = {Phosphorus addition increased carbon partitioning to autotrophic respiration but not to biomass production in an experiment with Zea mays},
  url          = {http://dx.doi.org/10.1111/pce.13785},
  doi          = {10.1111/pce.13785},
  volume       = {43},
  year         = {2020},
}