Impact of Irrigation Strategies on Tomato Root Distribution and Rhizosphere Processes in an Organic System.
Identifieur interne : 000119 ( Main/Corpus ); précédent : 000118; suivant : 000120Impact of Irrigation Strategies on Tomato Root Distribution and Rhizosphere Processes in an Organic System.
Auteurs : Meng Li ; Jennifer E. Schmidt ; Deirdre G. Lahue ; Patricia Lazicki ; Angela Kent ; Megan B. Machmuller ; Kate M. Scow ; Amélie C M. GaudinSource :
- Frontiers in plant science [ 1664-462X ] ; 2020.
Abstract
Root exploitation of soil heterogeneity and microbially mediated rhizosphere nutrient transformations play critical roles in plant resource uptake. However, how these processes change under water-saving irrigation technologies remains unclear, especially for organic systems where crops rely on soil ecological processes for plant nutrition and productivity. We conducted a field experiment and examined how water-saving subsurface drip irrigation (SDI) and concentrated organic fertilizer application altered root traits and rhizosphere processes compared to traditional furrow irrigation (FI) in an organic tomato system. We measured root distribution and morphology, the activities of C-, N-, and P-cycling enzymes in the rhizosphere, the abundance of rhizosphere microbial N-cycling genes, and root mycorrhizal colonization rate under two irrigation strategies. Tomato plants produced shorter and finer root systems with higher densities of roots around the drip line, lower activities of soil C-degrading enzymes, and shifts in the abundance of microbial N-cycling genes and mycorrhizal colonization rates in the rhizosphere of SDI plants compared to FI. SDI led to 66.4% higher irrigation water productivity than FI, but it also led to excessive vegetative growth and 28.3% lower tomato yield than FI. Our results suggest that roots and root-microbe interactions have a high potential for coordinated adaptation to water and nutrient spatial patterns to facilitate resource uptake under SDI. However, mismatches between plant needs and resource availability remain, highlighting the importance of assessing temporal dynamics of root-soil-microbe interactions to maximize their resource-mining potential for innovative irrigation systems.
DOI: 10.3389/fpls.2020.00360
PubMed: 32292412
PubMed Central: PMC7118217
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Lahue</name><affiliation><nlm:affiliation>Department of Crop and Soil Sciences, Washington State University, Mount Vernon, WA, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Lazicki, Patricia" sort="Lazicki, Patricia" uniqKey="Lazicki P" first="Patricia" last="Lazicki">Patricia Lazicki</name><affiliation><nlm:affiliation>Department of Land, Air, and Water Resources, University of California, Davis, Davis, CA, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Kent, Angela" sort="Kent, Angela" uniqKey="Kent A" first="Angela" last="Kent">Angela Kent</name><affiliation><nlm:affiliation>Department of Natural Resources and Environmental Science, University of Illinois at Urbana-Champaign, Urbana, IL, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Machmuller, Megan B" sort="Machmuller, Megan B" uniqKey="Machmuller M" first="Megan B" last="Machmuller">Megan B. 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Gaudin</name><affiliation><nlm:affiliation>Department of Plant Sciences, University of California, Davis, Davis, CA, United States.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2020">2020</date><idno type="RBID">pubmed:32292412</idno><idno type="pmid">32292412</idno><idno type="doi">10.3389/fpls.2020.00360</idno><idno type="pmc">PMC7118217</idno><idno type="wicri:Area/Main/Corpus">000119</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000119</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Impact of Irrigation Strategies on Tomato Root Distribution and Rhizosphere Processes in an Organic System.</title><author><name sortKey="Li, Meng" sort="Li, Meng" uniqKey="Li M" first="Meng" last="Li">Meng Li</name><affiliation><nlm:affiliation>Department of Plant Sciences, University of California, Davis, Davis, CA, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Schmidt, Jennifer E" sort="Schmidt, Jennifer E" uniqKey="Schmidt J" first="Jennifer E" last="Schmidt">Jennifer E. Schmidt</name><affiliation><nlm:affiliation>Department of Plant Sciences, University of California, Davis, Davis, CA, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Lahue, Deirdre G" sort="Lahue, Deirdre G" uniqKey="Lahue D" first="Deirdre G" last="Lahue">Deirdre G. Lahue</name><affiliation><nlm:affiliation>Department of Crop and Soil Sciences, Washington State University, Mount Vernon, WA, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Lazicki, Patricia" sort="Lazicki, Patricia" uniqKey="Lazicki P" first="Patricia" last="Lazicki">Patricia Lazicki</name><affiliation><nlm:affiliation>Department of Land, Air, and Water Resources, University of California, Davis, Davis, CA, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Kent, Angela" sort="Kent, Angela" uniqKey="Kent A" first="Angela" last="Kent">Angela Kent</name><affiliation><nlm:affiliation>Department of Natural Resources and Environmental Science, University of Illinois at Urbana-Champaign, Urbana, IL, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Machmuller, Megan B" sort="Machmuller, Megan B" uniqKey="Machmuller M" first="Megan B" last="Machmuller">Megan B. Machmuller</name><affiliation><nlm:affiliation>Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, United States.</nlm:affiliation></affiliation><affiliation><nlm:affiliation>Department of Soil and Crop Science, Colorado State University, Fort Collins, CO, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Scow, Kate M" sort="Scow, Kate M" uniqKey="Scow K" first="Kate M" last="Scow">Kate M. Scow</name><affiliation><nlm:affiliation>Department of Land, Air, and Water Resources, University of California, Davis, Davis, CA, United States.</nlm:affiliation></affiliation></author><author><name sortKey="Gaudin, Amelie C M" sort="Gaudin, Amelie C M" uniqKey="Gaudin A" first="Amélie C M" last="Gaudin">Amélie C M. Gaudin</name><affiliation><nlm:affiliation>Department of Plant Sciences, University of California, Davis, Davis, CA, United States.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Frontiers in plant science</title><idno type="ISSN">1664-462X</idno><imprint><date when="2020" type="published">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Root exploitation of soil heterogeneity and microbially mediated rhizosphere nutrient transformations play critical roles in plant resource uptake. However, how these processes change under water-saving irrigation technologies remains unclear, especially for organic systems where crops rely on soil ecological processes for plant nutrition and productivity. We conducted a field experiment and examined how water-saving subsurface drip irrigation (SDI) and concentrated organic fertilizer application altered root traits and rhizosphere processes compared to traditional furrow irrigation (FI) in an organic tomato system. We measured root distribution and morphology, the activities of C-, N-, and P-cycling enzymes in the rhizosphere, the abundance of rhizosphere microbial N-cycling genes, and root mycorrhizal colonization rate under two irrigation strategies. Tomato plants produced shorter and finer root systems with higher densities of roots around the drip line, lower activities of soil C-degrading enzymes, and shifts in the abundance of microbial N-cycling genes and mycorrhizal colonization rates in the rhizosphere of SDI plants compared to FI. SDI led to 66.4% higher irrigation water productivity than FI, but it also led to excessive vegetative growth and 28.3% lower tomato yield than FI. Our results suggest that roots and root-microbe interactions have a high potential for coordinated adaptation to water and nutrient spatial patterns to facilitate resource uptake under SDI. However, mismatches between plant needs and resource availability remain, highlighting the importance of assessing temporal dynamics of root-soil-microbe interactions to maximize their resource-mining potential for innovative irrigation systems.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">32292412</PMID><DateRevised><Year>2020</Year><Month>09</Month><Day>28</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Print">1664-462X</ISSN><JournalIssue CitedMedium="Print"><Volume>11</Volume><PubDate><Year>2020</Year></PubDate></JournalIssue><Title>Frontiers in plant science</Title><ISOAbbreviation>Front Plant Sci</ISOAbbreviation></Journal><ArticleTitle>Impact of Irrigation Strategies on Tomato Root Distribution and Rhizosphere Processes in an Organic System.</ArticleTitle><Pagination><MedlinePgn>360</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.3389/fpls.2020.00360</ELocationID><Abstract><AbstractText>Root exploitation of soil heterogeneity and microbially mediated rhizosphere nutrient transformations play critical roles in plant resource uptake. However, how these processes change under water-saving irrigation technologies remains unclear, especially for organic systems where crops rely on soil ecological processes for plant nutrition and productivity. We conducted a field experiment and examined how water-saving subsurface drip irrigation (SDI) and concentrated organic fertilizer application altered root traits and rhizosphere processes compared to traditional furrow irrigation (FI) in an organic tomato system. We measured root distribution and morphology, the activities of C-, N-, and P-cycling enzymes in the rhizosphere, the abundance of rhizosphere microbial N-cycling genes, and root mycorrhizal colonization rate under two irrigation strategies. Tomato plants produced shorter and finer root systems with higher densities of roots around the drip line, lower activities of soil C-degrading enzymes, and shifts in the abundance of microbial N-cycling genes and mycorrhizal colonization rates in the rhizosphere of SDI plants compared to FI. SDI led to 66.4% higher irrigation water productivity than FI, but it also led to excessive vegetative growth and 28.3% lower tomato yield than FI. Our results suggest that roots and root-microbe interactions have a high potential for coordinated adaptation to water and nutrient spatial patterns to facilitate resource uptake under SDI. However, mismatches between plant needs and resource availability remain, highlighting the importance of assessing temporal dynamics of root-soil-microbe interactions to maximize their resource-mining potential for innovative irrigation systems.</AbstractText><CopyrightInformation>Copyright © 2020 Li, Schmidt, LaHue, Lazicki, Kent, Machmuller, Scow and Gaudin.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Li</LastName><ForeName>Meng</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Department of Plant Sciences, University of California, Davis, Davis, CA, United States.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Schmidt</LastName><ForeName>Jennifer E</ForeName><Initials>JE</Initials><AffiliationInfo><Affiliation>Department of Plant Sciences, University of California, Davis, Davis, CA, United States.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>LaHue</LastName><ForeName>Deirdre G</ForeName><Initials>DG</Initials><AffiliationInfo><Affiliation>Department of Crop and Soil Sciences, Washington State University, Mount Vernon, WA, United States.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lazicki</LastName><ForeName>Patricia</ForeName><Initials>P</Initials><AffiliationInfo><Affiliation>Department of Land, Air, and Water Resources, University of California, Davis, Davis, CA, United States.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kent</LastName><ForeName>Angela</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Department of Natural Resources and Environmental Science, University of Illinois at Urbana-Champaign, Urbana, IL, United States.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Machmuller</LastName><ForeName>Megan B</ForeName><Initials>MB</Initials><AffiliationInfo><Affiliation>Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO, United States.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Soil and Crop Science, Colorado State University, Fort Collins, CO, United States.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Scow</LastName><ForeName>Kate M</ForeName><Initials>KM</Initials><AffiliationInfo><Affiliation>Department of Land, Air, and Water Resources, University of California, Davis, Davis, CA, United States.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Gaudin</LastName><ForeName>Amélie C M</ForeName><Initials>ACM</Initials><AffiliationInfo><Affiliation>Department of Plant Sciences, University of California, Davis, Davis, CA, United States.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2020</Year><Month>03</Month><Day>27</Day></ArticleDate></Article><MedlineJournalInfo><Country>Switzerland</Country><MedlineTA>Front Plant Sci</MedlineTA><NlmUniqueID>101568200</NlmUniqueID><ISSNLinking>1664-462X</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">N-cycling functional genes</Keyword><Keyword MajorTopicYN="N">mycorrhizae</Keyword><Keyword MajorTopicYN="N">organic system</Keyword><Keyword MajorTopicYN="N">rhizosphere</Keyword><Keyword MajorTopicYN="N">root distribution</Keyword><Keyword MajorTopicYN="N">soil enzyme activity</Keyword><Keyword MajorTopicYN="N">subsurface drip irrigation</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2019</Year><Month>09</Month><Day>11</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2020</Year><Month>03</Month><Day>12</Day></PubMedPubDate><PubMedPubDate 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