Abstract
Future atmospheric CO2 concentrations are predicted to increase, and directly affect host plant phenology, which, in turn, is assumed to mediate the performance of herbivorous insects indirectly as well as the abundance and epidemiology of plant diseases. In a 4-year field experiment, spring wheat (Triticum aestivum L. cv. Triso) and spring oilseed rape (Brassica napus L. cv. Campino) were grown using a mini- free-air CO2 enrichment (FACE) system, which consisted of a control (CON), an ambient treatment (AMB) and FACE treatments. The CON and AMB treatments did not receive additional CO2, whereas the FACE plots were moderately elevated by 150μLL-1 CO2. The impact of elevated CO2 was examined with regard to plant phenology, biomass, leaf nitrogen and carbon, abundance of insect pest species and their relative population growth by either direct counts or yellow sticky traps. Occurrence and damage of plants by pathogens on spring wheat and oilseed rape were directly assessed. Disease infestations on plants were not significantly different between ambient and elevated CO2 in any of the years. Plant phenology, aboveground biomass, foliar nitrogen and carbon concentrations were also not significantly affected by CO2 enrichment. In contrast, the abundance of some species of insects was significantly influenced by elevated CO2, showing either an increase or a decrease in infestation intensity.
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Claims 4
Claim · model-written summary
Disease infestations on wheat and oilseed rape were not significantly different between ambient and elevated CO2 in any year.
- Taxon
- spring wheat (Triticum aestivum L. cv. Triso) and spring oilseed rape (Brassica napus L. cv. Campino)
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napus
Triticum aestivume0 - Treatment
- elevated CO2e1
- Outcome
- Disease infestationse1
- Direction
- not significantly differente1
- Comparator
- ambiente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“spring wheat (Triticum aestivum L. cv. Triso) and spring oilseed rape (Brassica napus L. cv. Campino) were grown”
e1“Disease infestations on plants were not significantly different between ambient and elevated CO2 in any of the years”
Claim · model-written summary
Plant phenology and aboveground biomass were not significantly affected by CO2 enrichment in wheat and oilseed rape.
- Taxon
- spring wheat (Triticum aestivum L. cv. Triso) and spring oilseed rape (Brassica napus L. cv. Campino)Brassica napusTriticum aestivume0
- Treatment
- CO2 enrichmente2
- Outcome
- Plant phenology, aboveground biomasse2
- Direction
- not significantly affectede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spring wheat (Triticum aestivum L. cv. Triso) and spring oilseed rape (Brassica napus L. cv. Campino) were grown”
e2“Plant phenology, aboveground biomass, foliar nitrogen and carbon concentrations were also not significantly affected by CO2 enrichment”
Claim · model-written summary
Foliar nitrogen and carbon concentrations were not significantly affected by CO2 enrichment in wheat and oilseed rape.
- Taxon
- spring wheat (Triticum aestivum L. cv. Triso) and spring oilseed rape (Brassica napus L. cv. Campino)Brassica napusTriticum aestivume0
- Treatment
- CO2 enrichmente2
- Outcome
- foliar nitrogen and carbon concentrationse2
- Direction
- not significantly affectede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spring wheat (Triticum aestivum L. cv. Triso) and spring oilseed rape (Brassica napus L. cv. Campino) were grown”
e2“Plant phenology, aboveground biomass, foliar nitrogen and carbon concentrations were also not significantly affected by CO2 enrichment”
Claim · model-written summary
Elevated CO2 significantly influenced the abundance of some insect species, with either an increase or a decrease.
- Taxon
- spring wheat (Triticum aestivum L. cv. Triso) and spring oilseed rape (Brassica napus L. cv. Campino)Brassica napusTriticum aestivume0
- Treatment
- elevated CO2e3
- Outcome
- abundance of some species of insectse3
- Direction
- an increase or a decreasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spring wheat (Triticum aestivum L. cv. Triso) and spring oilseed rape (Brassica napus L. cv. Campino) were grown”
e3“the abundance of some species of insects was significantly influenced by elevated CO2, showing either an increase or a decrease in infestation intensity”
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