Short-term exposure to elevated atmospheric CO2 benefits the growth of a facultative annual root hemi-parasite, Rhinanthus minor (L.) more than that of its host, Poa pratensis (L.)

J K Hwangbo, W E Seel, S J Woodin

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9 Citations (Scopus)

Abstract

The effects of elevated CO2 (650 ppm) on interactions between a chlorophyllous parasitic angiosperm, Rhinanthus minor (L.) and a host, Poa pratensis (L.) were investigated. R. minor benefited from elevate CO2, with both photosynthesis and biomass increasing, and transpiration and tissue N concentration remaining unaffected. However, this did not alleviate the negative effect of the parasite on the host; R. minor reduced host photosynthesis, transpiration, leaf area and biomass, irrespective of CO2 concentration. Elevated CO2 resulted in increased host photosynthesis, but there was no concomitant increase in biomass and foliar N decreased. It appears that the parasite may reduce host growth more by competition for nitrogen than for carbon. Contrary to expectation, R. minor did not reduce the productivity of the host-parasite association, and it actually contributed to the stimulation of productivity of the association by elevated CO2.

Original languageEnglish
Pages (from-to)1951-1955
Number of pages5
JournalJournal of Experimental Botany
Volume54
DOIs
Publication statusPublished - 2003

Fingerprint

Rhinanthus minor
Poa
Poa pratensis
Photosynthesis
Biomass
Parasites
parasites
Growth
Angiosperms
photosynthesis
transpiration
biomass
Nitrogen
Carbon
Angiospermae
leaf area
carbon
nitrogen

Keywords

  • elevated CO2
  • nitrogen
  • parasitic angiosperm
  • photosynthesis
  • Poa pratensis
  • Rhinanthus minor
  • STRIGA-HERMONTHICA
  • PARASITIC PLANT
  • GAS-EXCHANGE
  • USE-EFFICIENCY
  • IMPACT
  • PHOTOSYNTHESIS
  • BIOCHEMISTRY
  • PHYSIOLOGY
  • SATIVA
  • FIELD

Cite this

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title = "Short-term exposure to elevated atmospheric CO2 benefits the growth of a facultative annual root hemi-parasite, Rhinanthus minor (L.) more than that of its host, Poa pratensis (L.)",
abstract = "The effects of elevated CO2 (650 ppm) on interactions between a chlorophyllous parasitic angiosperm, Rhinanthus minor (L.) and a host, Poa pratensis (L.) were investigated. R. minor benefited from elevate CO2, with both photosynthesis and biomass increasing, and transpiration and tissue N concentration remaining unaffected. However, this did not alleviate the negative effect of the parasite on the host; R. minor reduced host photosynthesis, transpiration, leaf area and biomass, irrespective of CO2 concentration. Elevated CO2 resulted in increased host photosynthesis, but there was no concomitant increase in biomass and foliar N decreased. It appears that the parasite may reduce host growth more by competition for nitrogen than for carbon. Contrary to expectation, R. minor did not reduce the productivity of the host-parasite association, and it actually contributed to the stimulation of productivity of the association by elevated CO2.",
keywords = "elevated CO2, nitrogen, parasitic angiosperm, photosynthesis, Poa pratensis, Rhinanthus minor, STRIGA-HERMONTHICA, PARASITIC PLANT, GAS-EXCHANGE, USE-EFFICIENCY, IMPACT, PHOTOSYNTHESIS, BIOCHEMISTRY, PHYSIOLOGY, SATIVA, FIELD",
author = "Hwangbo, {J K} and Seel, {W E} and Woodin, {S J}",
year = "2003",
doi = "10.1093/jxb/erg194",
language = "English",
volume = "54",
pages = "1951--1955",
journal = "Journal of Experimental Botany",
issn = "0022-0957",
publisher = "Oxford University Press",

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TY - JOUR

T1 - Short-term exposure to elevated atmospheric CO2 benefits the growth of a facultative annual root hemi-parasite, Rhinanthus minor (L.) more than that of its host, Poa pratensis (L.)

AU - Hwangbo, J K

AU - Seel, W E

AU - Woodin, S J

PY - 2003

Y1 - 2003

N2 - The effects of elevated CO2 (650 ppm) on interactions between a chlorophyllous parasitic angiosperm, Rhinanthus minor (L.) and a host, Poa pratensis (L.) were investigated. R. minor benefited from elevate CO2, with both photosynthesis and biomass increasing, and transpiration and tissue N concentration remaining unaffected. However, this did not alleviate the negative effect of the parasite on the host; R. minor reduced host photosynthesis, transpiration, leaf area and biomass, irrespective of CO2 concentration. Elevated CO2 resulted in increased host photosynthesis, but there was no concomitant increase in biomass and foliar N decreased. It appears that the parasite may reduce host growth more by competition for nitrogen than for carbon. Contrary to expectation, R. minor did not reduce the productivity of the host-parasite association, and it actually contributed to the stimulation of productivity of the association by elevated CO2.

AB - The effects of elevated CO2 (650 ppm) on interactions between a chlorophyllous parasitic angiosperm, Rhinanthus minor (L.) and a host, Poa pratensis (L.) were investigated. R. minor benefited from elevate CO2, with both photosynthesis and biomass increasing, and transpiration and tissue N concentration remaining unaffected. However, this did not alleviate the negative effect of the parasite on the host; R. minor reduced host photosynthesis, transpiration, leaf area and biomass, irrespective of CO2 concentration. Elevated CO2 resulted in increased host photosynthesis, but there was no concomitant increase in biomass and foliar N decreased. It appears that the parasite may reduce host growth more by competition for nitrogen than for carbon. Contrary to expectation, R. minor did not reduce the productivity of the host-parasite association, and it actually contributed to the stimulation of productivity of the association by elevated CO2.

KW - elevated CO2

KW - nitrogen

KW - parasitic angiosperm

KW - photosynthesis

KW - Poa pratensis

KW - Rhinanthus minor

KW - STRIGA-HERMONTHICA

KW - PARASITIC PLANT

KW - GAS-EXCHANGE

KW - USE-EFFICIENCY

KW - IMPACT

KW - PHOTOSYNTHESIS

KW - BIOCHEMISTRY

KW - PHYSIOLOGY

KW - SATIVA

KW - FIELD

U2 - 10.1093/jxb/erg194

DO - 10.1093/jxb/erg194

M3 - Article

VL - 54

SP - 1951

EP - 1955

JO - Journal of Experimental Botany

JF - Journal of Experimental Botany

SN - 0022-0957

ER -