A tillering inhibition gene influences root-shoot carbon partitioning and pattern of water use to improve wheat productivity in rainfed environments.
Identifieur interne : 002398 ( PubMed/Checkpoint ); précédent : 002397; suivant : 002399A tillering inhibition gene influences root-shoot carbon partitioning and pattern of water use to improve wheat productivity in rainfed environments.
Auteurs : P W Hendriks ; J A Kirkegaard ; J M Lilley ; P J Gregory [Royaume-Uni] ; G J Rebetzke [Australie]Source :
- Journal of experimental botany [ 1460-2431 ] ; 2016.
Descripteurs français
- KwdFr :
- Agriculture, Carbone (métabolisme), Eau (métabolisme), Grains comestibles (croissance et développement), Pousses de plante (métabolisme), Protéines végétales (génétique), Protéines végétales (métabolisme), Racines de plante (métabolisme), Triticum (croissance et développement), Triticum (génétique), Triticum (physiologie).
- MESH :
- croissance et développement : Grains comestibles, Triticum.
- génétique : Protéines végétales, Triticum.
- métabolisme : Carbone, Eau, Pousses de plante, Protéines végétales, Racines de plante.
- physiologie : Triticum.
- Agriculture.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : Plant Proteins.
- chemical , metabolism : Carbon, Plant Proteins, Water.
- genetics : Triticum.
- growth & development : Edible Grain, Triticum.
- metabolism : Plant Roots, Plant Shoots.
- physiology : Triticum.
- Agriculture.
Abstract
Genetic modification of shoot and root morphology has potential to improve water and nutrient uptake of wheat crops in rainfed environments. Near-isogenic lines (NILs) varying for a tillering inhibition (tin) gene and representing multiple genetic backgrounds were phenotyped in contrasting, controlled environments for shoot and root growth. Leaf area, shoot and root biomass were similar until tillering, whereupon reduced tillering in tin-containing NILs produced reductions of up to 60% in total leaf area and biomass, and increases in total root length of up to 120% and root biomass to 145%. Together, the root-to-shoot ratio increased two-fold with the tin gene. The influence of tin on shoot and root growth was greatest in the cv. Banks genetic background, particularly in the biculm-selected NIL, and was typically strongest in cooler environments. A separate de-tillering study confirmed greater root-to-shoot ratios with regular tiller removal in non-tin-containing genotypes. In validating these observations in a rainfed field study, the tin allele had a negligible effect on seedling growth but was associated with significantly (P<0.05) reduced tiller number (-37%), leaf area index (-26%), and spike number (-35%) to reduce plant biomass (-19%) at anthesis. Root biomass, root-to-shoot ratio at early stem elongation, and root depth at maturity were all increased in tin-containing NILs. Soil water use was slowed in tin-containing NILs, resulting in greater water availability, greater stomatal conductance, cooler canopy temperatures, and maintenance of green leaf area during grain-filling. Together these effects contributed to increases in harvest index and grain yield. In both the controlled and field environments, the tin gene was commonly associated with increased root length and biomass, but the significant influence of genetic background and environment suggests careful assessment of tin-containing progeny in selection for genotypic increases in root growth.
DOI: 10.1093/jxb/erv457
PubMed: 26494729
Affiliations:
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Near-isogenic lines (NILs) varying for a tillering inhibition (tin) gene and representing multiple genetic backgrounds were phenotyped in contrasting, controlled environments for shoot and root growth. Leaf area, shoot and root biomass were similar until tillering, whereupon reduced tillering in tin-containing NILs produced reductions of up to 60% in total leaf area and biomass, and increases in total root length of up to 120% and root biomass to 145%. Together, the root-to-shoot ratio increased two-fold with the tin gene. The influence of tin on shoot and root growth was greatest in the cv. Banks genetic background, particularly in the biculm-selected NIL, and was typically strongest in cooler environments. A separate de-tillering study confirmed greater root-to-shoot ratios with regular tiller removal in non-tin-containing genotypes. In validating these observations in a rainfed field study, the tin allele had a negligible effect on seedling growth but was associated with significantly (P<0.05) reduced tiller number (-37%), leaf area index (-26%), and spike number (-35%) to reduce plant biomass (-19%) at anthesis. Root biomass, root-to-shoot ratio at early stem elongation, and root depth at maturity were all increased in tin-containing NILs. Soil water use was slowed in tin-containing NILs, resulting in greater water availability, greater stomatal conductance, cooler canopy temperatures, and maintenance of green leaf area during grain-filling. Together these effects contributed to increases in harvest index and grain yield. In both the controlled and field environments, the tin gene was commonly associated with increased root length and biomass, but the significant influence of genetic background and environment suggests careful assessment of tin-containing progeny in selection for genotypic increases in root growth.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">26494729</PMID><DateCreated><Year>2015</Year><Month>12</Month><Day>18</Day></DateCreated><DateCompleted><Year>2016</Year><Month>09</Month><Day>23</Day></DateCompleted><DateRevised><Year>2017</Year><Month>02</Month><Day>20</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1460-2431</ISSN><JournalIssue CitedMedium="Internet"><Volume>67</Volume><Issue>1</Issue><PubDate><Year>2016</Year><Month>Jan</Month></PubDate></JournalIssue><Title>Journal of experimental botany</Title><ISOAbbreviation>J. Exp. Bot.</ISOAbbreviation></Journal><ArticleTitle>A tillering inhibition gene influences root-shoot carbon partitioning and pattern of water use to improve wheat productivity in rainfed environments.</ArticleTitle><Pagination><MedlinePgn>327-40</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/jxb/erv457</ELocationID><Abstract><AbstractText>Genetic modification of shoot and root morphology has potential to improve water and nutrient uptake of wheat crops in rainfed environments. Near-isogenic lines (NILs) varying for a tillering inhibition (tin) gene and representing multiple genetic backgrounds were phenotyped in contrasting, controlled environments for shoot and root growth. Leaf area, shoot and root biomass were similar until tillering, whereupon reduced tillering in tin-containing NILs produced reductions of up to 60% in total leaf area and biomass, and increases in total root length of up to 120% and root biomass to 145%. Together, the root-to-shoot ratio increased two-fold with the tin gene. The influence of tin on shoot and root growth was greatest in the cv. Banks genetic background, particularly in the biculm-selected NIL, and was typically strongest in cooler environments. A separate de-tillering study confirmed greater root-to-shoot ratios with regular tiller removal in non-tin-containing genotypes. In validating these observations in a rainfed field study, the tin allele had a negligible effect on seedling growth but was associated with significantly (P<0.05) reduced tiller number (-37%), leaf area index (-26%), and spike number (-35%) to reduce plant biomass (-19%) at anthesis. Root biomass, root-to-shoot ratio at early stem elongation, and root depth at maturity were all increased in tin-containing NILs. Soil water use was slowed in tin-containing NILs, resulting in greater water availability, greater stomatal conductance, cooler canopy temperatures, and maintenance of green leaf area during grain-filling. Together these effects contributed to increases in harvest index and grain yield. In both the controlled and field environments, the tin gene was commonly associated with increased root length and biomass, but the significant influence of genetic background and environment suggests careful assessment of tin-containing progeny in selection for genotypic increases in root growth.</AbstractText><CopyrightInformation>© The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hendriks</LastName><ForeName>P W</ForeName><Initials>PW</Initials><AffiliationInfo><Affiliation>CSIRO Agriculture, PO Box 1600, ACT 2601 Australia ENESAD, Dijon France now Domaine le Pérou, 18170 Le Chatelet France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kirkegaard</LastName><ForeName>J A</ForeName><Initials>JA</Initials><AffiliationInfo><Affiliation>CSIRO Agriculture, PO Box 1600, ACT 2601 Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lilley</LastName><ForeName>J M</ForeName><Initials>JM</Initials><AffiliationInfo><Affiliation>CSIRO Agriculture, PO Box 1600, ACT 2601 Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Gregory</LastName><ForeName>P J</ForeName><Initials>PJ</Initials><AffiliationInfo><Affiliation>Department of Soil Science, University of Reading, Whiteknights, Reading RG6 6DW, UK.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Rebetzke</LastName><ForeName>G J</ForeName><Initials>GJ</Initials><AffiliationInfo><Affiliation>CSIRO Agriculture, PO Box 1600, ACT 2601 Australia Greg.Rebetzke@csiro.au.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2015</Year><Month>10</Month><Day>22</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>J Exp Bot</MedlineTA><NlmUniqueID>9882906</NlmUniqueID><ISSNLinking>0022-0957</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D010940">Plant Proteins</NameOfSubstance></Chemical><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical><Chemical><RegistryNumber>7440-44-0</RegistryNumber><NameOfSubstance UI="D002244">Carbon</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><CommentsCorrectionsList><CommentsCorrections RefType="Cites"><RefSource>Theor Appl Genet. 2013 Jun;126(6):1563-74</RefSource><PMID Version="1">23525632</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>J Exp Bot. 2014 Nov;65(21):6231-49</RefSource><PMID Version="1">24963000</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Planta. 1967 Sep;77(3):261-76</RefSource><PMID Version="1">24522544</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>New Phytol. 2013 May;198(3):801-20</RefSource><PMID Version="1">23425331</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Theor Appl Genet. 2004 Oct;109(6):1303-10</RefSource><PMID Version="1">15448895</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Theor Appl Genet. 1996 Jan;92(1):28-39</RefSource><PMID Version="1">24166113</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Crop Sci. 2002 Jan;42(1):111-121</RefSource><PMID Version="1">11756261</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>J Exp Bot. 2013 Aug;64(11):3439-51</RefSource><PMID Version="1">23873998</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>J Exp Bot. 2013 Apr;64(6):1745-53</RefSource><PMID Version="1">23564959</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>J Exp Bot. 2012 May;63(9):3485-98</RefSource><PMID Version="1">22553286</PMID></CommentsCorrections></CommentsCorrectionsList><MeshHeadingList><MeshHeading><DescriptorName UI="D000383" MajorTopicYN="N">Agriculture</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D002244" MajorTopicYN="N">Carbon</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002523" MajorTopicYN="N">Edible Grain</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="Y">genetics</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018520" MajorTopicYN="N">Plant Shoots</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014908" MajorTopicYN="N">Triticum</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading></MeshHeadingList><OtherID Source="NLM">PMC4682434</OtherID><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Drought</Keyword><Keyword MajorTopicYN="N">phenotyping</Keyword><Keyword MajorTopicYN="N">root distribution</Keyword><Keyword MajorTopicYN="N">root length</Keyword><Keyword MajorTopicYN="N">root weight</Keyword><Keyword MajorTopicYN="N">tin</Keyword><Keyword MajorTopicYN="N">water use</Keyword><Keyword MajorTopicYN="N">wheat.</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2015</Year><Month>10</Month><Day>24</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2015</Year><Month>10</Month><Day>24</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2016</Year><Month>9</Month><Day>24</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">26494729</ArticleId><ArticleId IdType="pii">erv457</ArticleId><ArticleId IdType="doi">10.1093/jxb/erv457</ArticleId><ArticleId 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