Weed-Pathogen interactions and elevated CO2: growth changes in favour of the biological control agent

Shabbir, A., Dhileepan, K., Khan, N. and Adkins, S. W. (2014) Weed-Pathogen interactions and elevated CO2: growth changes in favour of the biological control agent. Weed Research, 54 3: 217-222. doi:10.1111/wre.12078

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Author Shabbir, A.
Dhileepan, K.
Khan, N.
Adkins, S. W.
Title Weed-Pathogen interactions and elevated CO2: growth changes in favour of the biological control agent
Journal name Weed Research   Check publisher's open access policy
ISSN 0043-1737
Publication date 2014-01-28
Sub-type Article (original research)
DOI 10.1111/wre.12078
Open Access Status Not yet assessed
Volume 54
Issue 3
Start page 217
End page 222
Total pages 6
Place of publication Chichester, West Sussex, United Kingdom
Publisher Wiley-Blackwell
Language eng
Formatted abstract
In this study, we used Parthenium hysterophorus and one of its biological control agents, the winter rust (Puccinia abrupta var. partheniicola) as a model system to investigate how the weed may respond to infection under a climate change scenario involving an elevated atmospheric CO2 (550 μmol mol-1) concentration. Under such a scenario, P. hysterophorus plants grew significantly taller (52%) and produced more biomass (55%) than under the ambient atmospheric CO2 concentration (380 μmol mol-1). Following winter rust infection, biomass production was reduced by 17% under the ambient and by 30% under the elevated atmospheric CO2 concentration. The production of branches and leaf area was significantly increased by 62% and 120%, under the elevated as compared with ambient CO2 concentration, but unaffected by rust infection under either condition. The photosynthesis and water use efficiency (WUE) of P. hysterophorus plants were increased by 94% and 400%, under the elevated as compared with the ambient atmospheric CO2 concentration. However, in the rust-infected plants, the photosynthesis and WUE decreased by 18% and 28%, respectively, under the elevated CO2 and were unaffected by the ambient atmospheric CO2 concentration. The results suggest that although P. hysterophorus will benefit from a future climate involving an elevation of the atmospheric CO2 concentration, it is also likely that the winter rust will perform more effectively as a biological control agent under these same conditions.
Keyword Parthenium hysterophorus
Parthenium weed
Winter rust
Elevated CO2
Growth efficiency
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 4 times in Scopus Article | Citations
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Created: Fri, 21 Mar 2014, 03:49:22 EST by Professor Steve Adkins on behalf of Qld Alliance for Agriculture and Food Innovation