Ectomycorrhizal fungi affect the physiological responses of Picea glauca and Pinus banksiana seedlings exposed to an NaCl gradient.
Identifieur interne : 003313 ( Main/Exploration ); précédent : 003312; suivant : 003314Ectomycorrhizal fungi affect the physiological responses of Picea glauca and Pinus banksiana seedlings exposed to an NaCl gradient.
Auteurs : Grégory Bois [Canada] ; Francine J. Bigras ; Annick Bertrand ; Yves Piché ; Martin Y P. Fung ; Damase P. KhasaSource :
- Tree physiology [ 0829-318X ] ; 2006.
Descripteurs français
- KwdFr :
- Chlorure de sodium (pharmacologie), Mycorhizes (physiologie), Photochimie (MeSH), Picea (effets des médicaments et des substances chimiques), Picea (microbiologie), Picea (physiologie), Pinus (effets des médicaments et des substances chimiques), Pinus (microbiologie), Pinus (physiologie), Plant (effets des médicaments et des substances chimiques), Plant (microbiologie), Plant (physiologie), Relation dose-effet des médicaments (MeSH).
- MESH :
- effets des médicaments et des substances chimiques : Picea, Pinus, Plant.
- microbiologie : Picea, Pinus, Plant.
- pharmacologie : Chlorure de sodium.
- physiologie : Mycorhizes, Picea, Pinus, Plant.
- Photochimie, Relation dose-effet des médicaments.
English descriptors
- KwdEn :
- Dose-Response Relationship, Drug (MeSH), Mycorrhizae (physiology), Photochemistry (MeSH), Picea (drug effects), Picea (microbiology), Picea (physiology), Pinus (drug effects), Pinus (microbiology), Pinus (physiology), Seedlings (drug effects), Seedlings (microbiology), Seedlings (physiology), Sodium Chloride (pharmacology).
- MESH :
- chemical , pharmacology : Sodium Chloride.
- drug effects : Picea, Pinus, Seedlings.
- microbiology : Picea, Pinus, Seedlings.
- physiology : Mycorrhizae, Picea, Pinus, Seedlings.
- Dose-Response Relationship, Drug, Photochemistry.
Abstract
We tested the effects of ectomycorrhizal (ECM) inoculation on greenhouse-grown white spruce (Picea glauca (Moench) Voss) and jack pine (Pinus banksiana L.) seedlings to be used for revegetation of salt-affected tailing sands resulting from the exploitation of oil sand in northeastern Alberta, Canada. White spruce and jack pine seedlings were inoculated with three ECM fungi selected for their in vitro tolerance to excess Na+ and Cl-: Hebeloma crustuliniforme (Bull) Quel. UAMH 5247, Laccaria bicolor Maire (Orton) UAMH 8232 and a Suillus tomentosus (Kauff.) Sing., Snell and Dick isolate from a salt-affected site. The physiological responses of the seedlings to a gradient of NaCl concentration (0, 50, 100 and 200 mM) were assessed over four weeks by: (1) Na+ accumulation and allocation; (2) chlorophyll a fluorescence; (3) growth, (4) water content; and (5) organic osmolyte accumulation. Jack pine seedlings were more sensitive than white spruce seedlings to increasing Na+ and Cl- concentrations. Both species showed decreasing biomass accumulation, and increasing concentrations of organic osmotica and Na with increasing NaCl concentration. White spruce seedlings inoculated with the S. tomentosus isolate had the best growth response at all NaCl concentrations tested. Although jack pine seedlings inoculated with the L. bicolor or S. tomentosus isolate exhibited the highest growth in the 50 and 100 mM NaCl treatments, both fungi increased the photochemical stress and dehydration of their hosts in the 200 mM NaCl treatment. At the latter concentration, jack pine seedlings inoculated with H. crustuliniforme showed the greatest tolerance to salt stress. Although the different fungi altered the physiological response of the host in different ways, inoculation with salt-stress-tolerant ECM fungi increased growth and reduced the negative effects of excess NaCl. Use of controlled mycorrhization may increase survival of coniferous seedlings used for revegetation of salt-affected sites.
DOI: 10.1093/treephys/26.9.1185
PubMed: 16740494
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Dose-Response Relationship, Drug (MeSH)</term>
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<term>Photochemistry (MeSH)</term>
<term>Picea (drug effects)</term>
<term>Picea (microbiology)</term>
<term>Picea (physiology)</term>
<term>Pinus (drug effects)</term>
<term>Pinus (microbiology)</term>
<term>Pinus (physiology)</term>
<term>Seedlings (drug effects)</term>
<term>Seedlings (microbiology)</term>
<term>Seedlings (physiology)</term>
<term>Sodium Chloride (pharmacology)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Chlorure de sodium (pharmacologie)</term>
<term>Mycorhizes (physiologie)</term>
<term>Photochimie (MeSH)</term>
<term>Picea (effets des médicaments et des substances chimiques)</term>
<term>Picea (microbiologie)</term>
<term>Picea (physiologie)</term>
<term>Pinus (effets des médicaments et des substances chimiques)</term>
<term>Pinus (microbiologie)</term>
<term>Pinus (physiologie)</term>
<term>Plant (effets des médicaments et des substances chimiques)</term>
<term>Plant (microbiologie)</term>
<term>Plant (physiologie)</term>
<term>Relation dose-effet des médicaments (MeSH)</term>
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<term>Pinus</term>
<term>Seedlings</term>
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<term>Plant</term>
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<term>Pinus</term>
<term>Seedlings</term>
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<keywords scheme="MESH" qualifier="pharmacologie" xml:lang="fr"><term>Chlorure de sodium</term>
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<term>Relation dose-effet des médicaments</term>
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<front><div type="abstract" xml:lang="en">We tested the effects of ectomycorrhizal (ECM) inoculation on greenhouse-grown white spruce (Picea glauca (Moench) Voss) and jack pine (Pinus banksiana L.) seedlings to be used for revegetation of salt-affected tailing sands resulting from the exploitation of oil sand in northeastern Alberta, Canada. White spruce and jack pine seedlings were inoculated with three ECM fungi selected for their in vitro tolerance to excess Na+ and Cl-: Hebeloma crustuliniforme (Bull) Quel. UAMH 5247, Laccaria bicolor Maire (Orton) UAMH 8232 and a Suillus tomentosus (Kauff.) Sing., Snell and Dick isolate from a salt-affected site. The physiological responses of the seedlings to a gradient of NaCl concentration (0, 50, 100 and 200 mM) were assessed over four weeks by: (1) Na+ accumulation and allocation; (2) chlorophyll a fluorescence; (3) growth, (4) water content; and (5) organic osmolyte accumulation. Jack pine seedlings were more sensitive than white spruce seedlings to increasing Na+ and Cl- concentrations. Both species showed decreasing biomass accumulation, and increasing concentrations of organic osmotica and Na with increasing NaCl concentration. White spruce seedlings inoculated with the S. tomentosus isolate had the best growth response at all NaCl concentrations tested. Although jack pine seedlings inoculated with the L. bicolor or S. tomentosus isolate exhibited the highest growth in the 50 and 100 mM NaCl treatments, both fungi increased the photochemical stress and dehydration of their hosts in the 200 mM NaCl treatment. At the latter concentration, jack pine seedlings inoculated with H. crustuliniforme showed the greatest tolerance to salt stress. Although the different fungi altered the physiological response of the host in different ways, inoculation with salt-stress-tolerant ECM fungi increased growth and reduced the negative effects of excess NaCl. Use of controlled mycorrhization may increase survival of coniferous seedlings used for revegetation of salt-affected sites.</div>
</front>
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<Title>Tree physiology</Title>
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<ArticleTitle>Ectomycorrhizal fungi affect the physiological responses of Picea glauca and Pinus banksiana seedlings exposed to an NaCl gradient.</ArticleTitle>
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<Abstract><AbstractText>We tested the effects of ectomycorrhizal (ECM) inoculation on greenhouse-grown white spruce (Picea glauca (Moench) Voss) and jack pine (Pinus banksiana L.) seedlings to be used for revegetation of salt-affected tailing sands resulting from the exploitation of oil sand in northeastern Alberta, Canada. White spruce and jack pine seedlings were inoculated with three ECM fungi selected for their in vitro tolerance to excess Na+ and Cl-: Hebeloma crustuliniforme (Bull) Quel. UAMH 5247, Laccaria bicolor Maire (Orton) UAMH 8232 and a Suillus tomentosus (Kauff.) Sing., Snell and Dick isolate from a salt-affected site. The physiological responses of the seedlings to a gradient of NaCl concentration (0, 50, 100 and 200 mM) were assessed over four weeks by: (1) Na+ accumulation and allocation; (2) chlorophyll a fluorescence; (3) growth, (4) water content; and (5) organic osmolyte accumulation. Jack pine seedlings were more sensitive than white spruce seedlings to increasing Na+ and Cl- concentrations. Both species showed decreasing biomass accumulation, and increasing concentrations of organic osmotica and Na with increasing NaCl concentration. White spruce seedlings inoculated with the S. tomentosus isolate had the best growth response at all NaCl concentrations tested. Although jack pine seedlings inoculated with the L. bicolor or S. tomentosus isolate exhibited the highest growth in the 50 and 100 mM NaCl treatments, both fungi increased the photochemical stress and dehydration of their hosts in the 200 mM NaCl treatment. At the latter concentration, jack pine seedlings inoculated with H. crustuliniforme showed the greatest tolerance to salt stress. Although the different fungi altered the physiological response of the host in different ways, inoculation with salt-stress-tolerant ECM fungi increased growth and reduced the negative effects of excess NaCl. Use of controlled mycorrhization may increase survival of coniferous seedlings used for revegetation of salt-affected sites.</AbstractText>
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<MeshHeading><DescriptorName UI="D028223" MajorTopicYN="N">Pinus</DescriptorName>
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<QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName>
<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
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<MeshHeading><DescriptorName UI="D036226" MajorTopicYN="N">Seedlings</DescriptorName>
<QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
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