Soil microbial communities buffer physiological responses to drought stress in three hardwood species.
Identifieur interne : 000131 ( Main/Exploration ); précédent : 000130; suivant : 000132Soil microbial communities buffer physiological responses to drought stress in three hardwood species.
Auteurs : Steven A. Kannenberg [États-Unis] ; Richard P. Phillips [États-Unis]Source :
- Oecologia [ 1432-1939 ] ; 2017.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical : Soil, Water.
- Droughts, Plant Leaves, Quercus, Soil Microbiology, Stress, Physiological, Trees.
Abstract
Trees possess myriad adaptations for coping with drought stress, but the extent to which their drought responses are influenced by interactions with soil microbes is poorly understood. To explore the role of microbes in mediating tree responses to drought stress, we exposed saplings of three species (Acer saccharum, Liriodendron tulipifera, and Quercus alba) to a four week experimental drought in mesocosms. Half of the pots were inoculated with a live soil slurry (i.e., a microbial inoculum derived from soils beneath the canopies of mature A. saccharum, L. tulipifera or Q. alba stands), while the other half of the pots received a sterile soil slurry. Soil microbes ameliorated drought stress in L. tulipifera by minimizing reductions in leaf water potential and by reducing photosynthetic declines. In A. saccharum, soil microbes reduced drought stress by lessening declines in leaf water potential, though these changes did not buffer the trees from declining photosynthetic rates. In Q. alba, soil microbes had no effects on leaf physiological parameters during drought stress. In all species, microbes had no significant effects on dynamic C allocation during drought stress, suggesting that microbial effects on plant physiology were unrelated to source-sink dynamics. Collectively, our results suggest that soil microbes have the potential to alter key parameters that are used to diagnose drought sensitivity (i.e., isohydry or anisohydry). To the extent that our results reflect dynamics occurring in forests, a revised perspective on plant hydraulic strategies that considers root-microbe interactions may lead to improved predictions of forest vulnerability to drought.
DOI: 10.1007/s00442-016-3783-2
PubMed: 27896478
Affiliations:
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Kannenberg</name><affiliation wicri:level="1"><nlm:affiliation>Department of Biology, Indiana University, Bloomington, IN, 47403, USA. sakannen@indiana.edu.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biology, Indiana University, Bloomington, IN, 47403</wicri:regionArea><wicri:noRegion>47403</wicri:noRegion></affiliation></author><author><name sortKey="Phillips, Richard P" sort="Phillips, Richard P" uniqKey="Phillips R" first="Richard P" last="Phillips">Richard P. Phillips</name><affiliation wicri:level="1"><nlm:affiliation>Department of Biology, Indiana University, Bloomington, IN, 47403, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biology, Indiana University, Bloomington, IN, 47403</wicri:regionArea><wicri:noRegion>47403</wicri:noRegion></affiliation></author></analytic><series><title level="j">Oecologia</title><idno type="eISSN">1432-1939</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Droughts (MeSH)</term><term>Plant Leaves (MeSH)</term><term>Quercus (MeSH)</term><term>Soil (MeSH)</term><term>Soil Microbiology (MeSH)</term><term>Stress, Physiological (MeSH)</term><term>Trees (MeSH)</term><term>Water (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (MeSH)</term><term>Eau (MeSH)</term><term>Feuilles de plante (MeSH)</term><term>Microbiologie du sol (MeSH)</term><term>Quercus (MeSH)</term><term>Sol (MeSH)</term><term>Stress physiologique (MeSH)</term><term>Sécheresses (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Soil</term><term>Water</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Droughts</term><term>Plant Leaves</term><term>Quercus</term><term>Soil Microbiology</term><term>Stress, Physiological</term><term>Trees</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Arbres</term><term>Eau</term><term>Feuilles de plante</term><term>Microbiologie du sol</term><term>Quercus</term><term>Sol</term><term>Stress physiologique</term><term>Sécheresses</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Trees possess myriad adaptations for coping with drought stress, but the extent to which their drought responses are influenced by interactions with soil microbes is poorly understood. To explore the role of microbes in mediating tree responses to drought stress, we exposed saplings of three species (Acer saccharum, Liriodendron tulipifera, and Quercus alba) to a four week experimental drought in mesocosms. Half of the pots were inoculated with a live soil slurry (i.e., a microbial inoculum derived from soils beneath the canopies of mature A. saccharum, L. tulipifera or Q. alba stands), while the other half of the pots received a sterile soil slurry. Soil microbes ameliorated drought stress in L. tulipifera by minimizing reductions in leaf water potential and by reducing photosynthetic declines. In A. saccharum, soil microbes reduced drought stress by lessening declines in leaf water potential, though these changes did not buffer the trees from declining photosynthetic rates. In Q. alba, soil microbes had no effects on leaf physiological parameters during drought stress. In all species, microbes had no significant effects on dynamic C allocation during drought stress, suggesting that microbial effects on plant physiology were unrelated to source-sink dynamics. Collectively, our results suggest that soil microbes have the potential to alter key parameters that are used to diagnose drought sensitivity (i.e., isohydry or anisohydry). To the extent that our results reflect dynamics occurring in forests, a revised perspective on plant hydraulic strategies that considers root-microbe interactions may lead to improved predictions of forest vulnerability to drought.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">27896478</PMID><DateCompleted><Year>2017</Year><Month>05</Month><Day>15</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1432-1939</ISSN><JournalIssue CitedMedium="Internet"><Volume>183</Volume><Issue>3</Issue><PubDate><Year>2017</Year><Month>03</Month></PubDate></JournalIssue><Title>Oecologia</Title><ISOAbbreviation>Oecologia</ISOAbbreviation></Journal><ArticleTitle>Soil microbial communities buffer physiological responses to drought stress in three hardwood species.</ArticleTitle><Pagination><MedlinePgn>631-641</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/s00442-016-3783-2</ELocationID><Abstract><AbstractText>Trees possess myriad adaptations for coping with drought stress, but the extent to which their drought responses are influenced by interactions with soil microbes is poorly understood. To explore the role of microbes in mediating tree responses to drought stress, we exposed saplings of three species (Acer saccharum, Liriodendron tulipifera, and Quercus alba) to a four week experimental drought in mesocosms. Half of the pots were inoculated with a live soil slurry (i.e., a microbial inoculum derived from soils beneath the canopies of mature A. saccharum, L. tulipifera or Q. alba stands), while the other half of the pots received a sterile soil slurry. Soil microbes ameliorated drought stress in L. tulipifera by minimizing reductions in leaf water potential and by reducing photosynthetic declines. In A. saccharum, soil microbes reduced drought stress by lessening declines in leaf water potential, though these changes did not buffer the trees from declining photosynthetic rates. In Q. alba, soil microbes had no effects on leaf physiological parameters during drought stress. In all species, microbes had no significant effects on dynamic C allocation during drought stress, suggesting that microbial effects on plant physiology were unrelated to source-sink dynamics. Collectively, our results suggest that soil microbes have the potential to alter key parameters that are used to diagnose drought sensitivity (i.e., isohydry or anisohydry). To the extent that our results reflect dynamics occurring in forests, a revised perspective on plant hydraulic strategies that considers root-microbe interactions may lead to improved predictions of forest vulnerability to drought.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Kannenberg</LastName><ForeName>Steven A</ForeName><Initials>SA</Initials><AffiliationInfo><Affiliation>Department of Biology, Indiana University, Bloomington, IN, 47403, USA. sakannen@indiana.edu.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Phillips</LastName><ForeName>Richard P</ForeName><Initials>RP</Initials><AffiliationInfo><Affiliation>Department of Biology, Indiana University, Bloomington, IN, 47403, USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, 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MajorTopicYN="Y">Soil</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012988" MajorTopicYN="N">Soil Microbiology</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013312" MajorTopicYN="N">Stress, Physiological</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="Y">Drought stress</Keyword><Keyword MajorTopicYN="Y">Gas exchange</Keyword><Keyword MajorTopicYN="Y">Inoculation</Keyword><Keyword MajorTopicYN="Y">Isohydry</Keyword><Keyword MajorTopicYN="Y">Root-microbe interaction</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2016</Year><Month>05</Month><Day>26</Day></PubMedPubDate><PubMedPubDate 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Kannenberg</name></noRegion><name sortKey="Phillips, Richard P" sort="Phillips, Richard P" uniqKey="Phillips R" first="Richard P" last="Phillips">Richard P. Phillips</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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