The Relationship between Relative Growth Rate and Susceptibility to Aphids in Wild Barley under Different Nutrient Levels

The Resource Availability Hypothesis (RAH) states that plants with a low Relative Growth Rate (RGR) and high levels of defence against herbivores or pathogens are favoured in habitats with low resource availability, whereas plants with a high potential RGR and low levels of defence are favoured in e...

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Veröffentlicht in:Oecologia 2003-12, Vol.137 (4), p.564-571
Hauptverfasser: Elberse, I. A. M., J. H. B. Turin, Wäckers, F. L., Van Damme, J. M. M., P. H. Van Tienderen
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container_end_page 571
container_issue 4
container_start_page 564
container_title Oecologia
container_volume 137
creator Elberse, I. A. M.
J. H. B. Turin
Wäckers, F. L.
Van Damme, J. M. M.
P. H. Van Tienderen
description The Resource Availability Hypothesis (RAH) states that plants with a low Relative Growth Rate (RGR) and high levels of defence against herbivores or pathogens are favoured in habitats with low resource availability, whereas plants with a high potential RGR and low levels of defence are favoured in environments with high resource availability. High levels of defence are expected to result in lower reproduction and/or growth of the herbivores or pathogens. To test this hypothesis, four accessions of each of nine natural Hordeum spontaneum (wild barley) populations were grown in a climate chamber under two levels of nutrient supply. Susceptibility to Schizaphis graminum (greenbug) was quantified by placing a single adult greenbug on each plant and measuring its realised fecundity after 8 days. Data on potential RGR were available from a previous experiment. No support for the RAH was found. The correlation between potential RGR and greenbug reproduction was not significant, neither at the high nor at the low level of nutrient supply. Furthermore, on average plants grown under high and low nutrients did not differ in susceptibility. However, accessions-within-populations differed in the way susceptibility was affected by nutrient supply, and most accessions had a higher susceptibility under nutrient-poor conditions. It could be that these accessions differed in the spectrum of secondary metabolites they produced. Whatever the cause, the genetic variation for the reaction in susceptibility to nutrient supply suggests that selection could act in favour of more or less plasticity in plants without any apparent change in potential RGR.
doi_str_mv 10.1007/s00442-003-1383-4
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A. M. ; J. H. B. Turin ; Wäckers, F. L. ; Van Damme, J. M. M. ; P. H. Van Tienderen</creator><creatorcontrib>Elberse, I. A. M. ; J. H. B. Turin ; Wäckers, F. L. ; Van Damme, J. M. M. ; P. H. Van Tienderen</creatorcontrib><description>The Resource Availability Hypothesis (RAH) states that plants with a low Relative Growth Rate (RGR) and high levels of defence against herbivores or pathogens are favoured in habitats with low resource availability, whereas plants with a high potential RGR and low levels of defence are favoured in environments with high resource availability. High levels of defence are expected to result in lower reproduction and/or growth of the herbivores or pathogens. To test this hypothesis, four accessions of each of nine natural Hordeum spontaneum (wild barley) populations were grown in a climate chamber under two levels of nutrient supply. Susceptibility to Schizaphis graminum (greenbug) was quantified by placing a single adult greenbug on each plant and measuring its realised fecundity after 8 days. Data on potential RGR were available from a previous experiment. No support for the RAH was found. The correlation between potential RGR and greenbug reproduction was not significant, neither at the high nor at the low level of nutrient supply. Furthermore, on average plants grown under high and low nutrients did not differ in susceptibility. However, accessions-within-populations differed in the way susceptibility was affected by nutrient supply, and most accessions had a higher susceptibility under nutrient-poor conditions. It could be that these accessions differed in the spectrum of secondary metabolites they produced. 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A. M.</creatorcontrib><creatorcontrib>J. H. B. Turin</creatorcontrib><creatorcontrib>Wäckers, F. L.</creatorcontrib><creatorcontrib>Van Damme, J. M. M.</creatorcontrib><creatorcontrib>P. H. Van Tienderen</creatorcontrib><title>The Relationship between Relative Growth Rate and Susceptibility to Aphids in Wild Barley under Different Nutrient Levels</title><title>Oecologia</title><addtitle>Oecologia</addtitle><description>The Resource Availability Hypothesis (RAH) states that plants with a low Relative Growth Rate (RGR) and high levels of defence against herbivores or pathogens are favoured in habitats with low resource availability, whereas plants with a high potential RGR and low levels of defence are favoured in environments with high resource availability. High levels of defence are expected to result in lower reproduction and/or growth of the herbivores or pathogens. To test this hypothesis, four accessions of each of nine natural Hordeum spontaneum (wild barley) populations were grown in a climate chamber under two levels of nutrient supply. Susceptibility to Schizaphis graminum (greenbug) was quantified by placing a single adult greenbug on each plant and measuring its realised fecundity after 8 days. Data on potential RGR were available from a previous experiment. No support for the RAH was found. The correlation between potential RGR and greenbug reproduction was not significant, neither at the high nor at the low level of nutrient supply. Furthermore, on average plants grown under high and low nutrients did not differ in susceptibility. However, accessions-within-populations differed in the way susceptibility was affected by nutrient supply, and most accessions had a higher susceptibility under nutrient-poor conditions. It could be that these accessions differed in the spectrum of secondary metabolites they produced. 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A. M.</au><au>J. H. B. Turin</au><au>Wäckers, F. L.</au><au>Van Damme, J. M. M.</au><au>P. H. Van Tienderen</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Relationship between Relative Growth Rate and Susceptibility to Aphids in Wild Barley under Different Nutrient Levels</atitle><jtitle>Oecologia</jtitle><addtitle>Oecologia</addtitle><date>2003-12-01</date><risdate>2003</risdate><volume>137</volume><issue>4</issue><spage>564</spage><epage>571</epage><pages>564-571</pages><issn>0029-8549</issn><eissn>1432-1939</eissn><coden>OECOBX</coden><abstract>The Resource Availability Hypothesis (RAH) states that plants with a low Relative Growth Rate (RGR) and high levels of defence against herbivores or pathogens are favoured in habitats with low resource availability, whereas plants with a high potential RGR and low levels of defence are favoured in environments with high resource availability. High levels of defence are expected to result in lower reproduction and/or growth of the herbivores or pathogens. To test this hypothesis, four accessions of each of nine natural Hordeum spontaneum (wild barley) populations were grown in a climate chamber under two levels of nutrient supply. Susceptibility to Schizaphis graminum (greenbug) was quantified by placing a single adult greenbug on each plant and measuring its realised fecundity after 8 days. Data on potential RGR were available from a previous experiment. No support for the RAH was found. The correlation between potential RGR and greenbug reproduction was not significant, neither at the high nor at the low level of nutrient supply. Furthermore, on average plants grown under high and low nutrients did not differ in susceptibility. However, accessions-within-populations differed in the way susceptibility was affected by nutrient supply, and most accessions had a higher susceptibility under nutrient-poor conditions. It could be that these accessions differed in the spectrum of secondary metabolites they produced. Whatever the cause, the genetic variation for the reaction in susceptibility to nutrient supply suggests that selection could act in favour of more or less plasticity in plants without any apparent change in potential RGR.</abstract><cop>Berlin</cop><pub>Springer-Verlag</pub><pmid>13680349</pmid><doi>10.1007/s00442-003-1383-4</doi><tpages>8</tpages></addata></record>
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subjects Adaptation, Physiological
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Aphids
Autoecology
Barley
Biological and medical sciences
Climate
Fecundity
Feeding Behavior
Female
Fertility
Fundamental and applied biological sciences. Psychology
Genetic diversity
Growth rate
Herbivores
Hordeum - growth & development
Male
Metabolites
Nutrient availability
Nutrient nutrient interactions
Nutrients
Nymphs
Pathogens
Plant Animal Interactions
Plant growth
Plant nutrition
Plants
Plants and fungi
Plants, Edible
Population Dynamics
Resource availability
Secondary metabolites
Species
title The Relationship between Relative Growth Rate and Susceptibility to Aphids in Wild Barley under Different Nutrient Levels
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