Effects of elevated atmospheric CO2 concentration on the nutrient uptake characteristics of Japanese larch (Larix kaempferi).
Identifieur interne : 003071 ( Main/Corpus ); précédent : 003070; suivant : 003072Effects of elevated atmospheric CO2 concentration on the nutrient uptake characteristics of Japanese larch (Larix kaempferi).
Auteurs : Takuro Shinano ; Takuya Yamamoto ; Keitaro Tawaraya ; Masaru Tadokoro ; Takayoshi Koike ; Mitsuru OsakiSource :
- Tree physiology [ 0829-318X ] ; 2007.
English descriptors
- KwdEn :
- MESH :
- chemical , pharmacology : Carbon Dioxide.
- drug effects : Larix, Mycorrhizae, Plant Roots.
- metabolism : Larix, Mycorrhizae, Plant Roots.
- microbiology : Plant Roots.
- Atmosphere.
Abstract
We evaluated the response of Japanese larch (Larix kaempferi Sieb. & Zucc.) to elevated atmospheric CO(2) concentration ([CO(2)]) (689 +/- 75 ppm in 2002 and 697 +/- 90 ppm in 2003) over 2 years in a field experiment with open-top chambers. Root activity was assessed as nitrogen, phosphorus and potassium uptake rates estimated from successive measurements of absorbed amounts. Dry matter production of whole plants was unaffected by elevated [CO(2)] in the first year of treatment, but increased significantly in response to elevated [CO(2)] in the second year. In contrast, elevated [CO(2)] increased the root to shoot ratio and fine root dry mass in the first year, but not in the second year. Elevated [CO(2)] had no effect on tissue N, P and K concentrations. Uptake rates of N, P and K correlated with whole-plant relative growth rates, but were unaffected by growth [CO(2)], as was ectomycorrhizal colonization, a factor assumed to be important for nutrient uptake in trees. We conclude that improved growth of Larix kaempferi in response to elevated [CO(2)] is accompanied by increased root biomass, but not by increased root activity.
DOI: 10.1093/treephys/27.1.97
PubMed: 17169911
Links to Exploration step
pubmed:17169911Le document en format XML
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<author><name sortKey="Shinano, Takuro" sort="Shinano, Takuro" uniqKey="Shinano T" first="Takuro" last="Shinano">Takuro Shinano</name>
<affiliation><nlm:affiliation>Sousei Creative Research Initiative, Hokkaido University, Kita 21, Nishi 10, Kitaku, Sapporo 001-0021, Japan. takuro@chem.agr.hokudai.ac.jp</nlm:affiliation>
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<author><name sortKey="Yamamoto, Takuya" sort="Yamamoto, Takuya" uniqKey="Yamamoto T" first="Takuya" last="Yamamoto">Takuya Yamamoto</name>
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<author><name sortKey="Tawaraya, Keitaro" sort="Tawaraya, Keitaro" uniqKey="Tawaraya K" first="Keitaro" last="Tawaraya">Keitaro Tawaraya</name>
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<author><name sortKey="Tadokoro, Masaru" sort="Tadokoro, Masaru" uniqKey="Tadokoro M" first="Masaru" last="Tadokoro">Masaru Tadokoro</name>
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<author><name sortKey="Koike, Takayoshi" sort="Koike, Takayoshi" uniqKey="Koike T" first="Takayoshi" last="Koike">Takayoshi Koike</name>
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<author><name sortKey="Osaki, Mitsuru" sort="Osaki, Mitsuru" uniqKey="Osaki M" first="Mitsuru" last="Osaki">Mitsuru Osaki</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Effects of elevated atmospheric CO2 concentration on the nutrient uptake characteristics of Japanese larch (Larix kaempferi).</title>
<author><name sortKey="Shinano, Takuro" sort="Shinano, Takuro" uniqKey="Shinano T" first="Takuro" last="Shinano">Takuro Shinano</name>
<affiliation><nlm:affiliation>Sousei Creative Research Initiative, Hokkaido University, Kita 21, Nishi 10, Kitaku, Sapporo 001-0021, Japan. takuro@chem.agr.hokudai.ac.jp</nlm:affiliation>
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<author><name sortKey="Koike, Takayoshi" sort="Koike, Takayoshi" uniqKey="Koike T" first="Takayoshi" last="Koike">Takayoshi Koike</name>
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<series><title level="j">Tree physiology</title>
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<term>Carbon Dioxide (pharmacology)</term>
<term>Larix (drug effects)</term>
<term>Larix (metabolism)</term>
<term>Mycorrhizae (drug effects)</term>
<term>Mycorrhizae (metabolism)</term>
<term>Plant Roots (drug effects)</term>
<term>Plant Roots (metabolism)</term>
<term>Plant Roots (microbiology)</term>
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<keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Carbon Dioxide</term>
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<keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Larix</term>
<term>Mycorrhizae</term>
<term>Plant Roots</term>
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<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Larix</term>
<term>Mycorrhizae</term>
<term>Plant Roots</term>
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<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Plant Roots</term>
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<front><div type="abstract" xml:lang="en">We evaluated the response of Japanese larch (Larix kaempferi Sieb. & Zucc.) to elevated atmospheric CO(2) concentration ([CO(2)]) (689 +/- 75 ppm in 2002 and 697 +/- 90 ppm in 2003) over 2 years in a field experiment with open-top chambers. Root activity was assessed as nitrogen, phosphorus and potassium uptake rates estimated from successive measurements of absorbed amounts. Dry matter production of whole plants was unaffected by elevated [CO(2)] in the first year of treatment, but increased significantly in response to elevated [CO(2)] in the second year. In contrast, elevated [CO(2)] increased the root to shoot ratio and fine root dry mass in the first year, but not in the second year. Elevated [CO(2)] had no effect on tissue N, P and K concentrations. Uptake rates of N, P and K correlated with whole-plant relative growth rates, but were unaffected by growth [CO(2)], as was ectomycorrhizal colonization, a factor assumed to be important for nutrient uptake in trees. We conclude that improved growth of Larix kaempferi in response to elevated [CO(2)] is accompanied by increased root biomass, but not by increased root activity.</div>
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<Abstract><AbstractText>We evaluated the response of Japanese larch (Larix kaempferi Sieb. & Zucc.) to elevated atmospheric CO(2) concentration ([CO(2)]) (689 +/- 75 ppm in 2002 and 697 +/- 90 ppm in 2003) over 2 years in a field experiment with open-top chambers. Root activity was assessed as nitrogen, phosphorus and potassium uptake rates estimated from successive measurements of absorbed amounts. Dry matter production of whole plants was unaffected by elevated [CO(2)] in the first year of treatment, but increased significantly in response to elevated [CO(2)] in the second year. In contrast, elevated [CO(2)] increased the root to shoot ratio and fine root dry mass in the first year, but not in the second year. Elevated [CO(2)] had no effect on tissue N, P and K concentrations. Uptake rates of N, P and K correlated with whole-plant relative growth rates, but were unaffected by growth [CO(2)], as was ectomycorrhizal colonization, a factor assumed to be important for nutrient uptake in trees. We conclude that improved growth of Larix kaempferi in response to elevated [CO(2)] is accompanied by increased root biomass, but not by increased root activity.</AbstractText>
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