The effects of hydroxy fatty acids on the hyphal branching of germinated spores of AM fungi.
Identifieur interne : 002325 ( Main/Corpus ); précédent : 002324; suivant : 002326The effects of hydroxy fatty acids on the hyphal branching of germinated spores of AM fungi.
Auteurs : Gerald Nagahashi ; David D. DoudsSource :
- Fungal biology [ 1878-6146 ]
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Decanoates, Hydroxy Acids, Plant Exudates.
- chemistry : Daucus carota, Plant Roots.
- growth & development : Hyphae, Mycorrhizae, Spores, Fungal.
- physiology : Mycorrhizae.
Abstract
Two hydroxy fatty acids, tentatively identified previously in carrot root exudates, were tested for their effects on hyphal growth of the arbuscular mycorrhizal (AM) fungus, Gigaspora gigantea (Nicol. and Gerd.) Gerdemann and Trappe. Best results were achieved with a long-term bioassay (7-8d) with nanomolar concentrations throughout the Petri dish in contrast to the rapid microinjection bioassay (16-24h) in which nanogram quantities were injected near growing hyphal tips. When 5nM 2-hydroxy fatty acids of various chain length were tested, the length of the hydroxyl fatty acid was significant since only 2-hydroxytetradecanoic acid (2OH-TDA) and to a slightly lesser degree, 2-hydroxydodecanoic acid (2OH-DDA) induced a hyphal growth response while 2-hydroxydecanoic acid (2OH-DA) and 2-hydroxyhexadecanoic (2OH-HDA) acid did not. The position of the hydroxyl group was critical since 5nM 3-hydroxytetradecanoic acid (3OH-TDA) had no effect on hyphal growth. The length of the non-hydroxy containing straight chain fatty acid, per se, did not appear significant since none of these fatty acids had an effect on hyphal growth. The morphological growth response promoted by 2OH-TDA consisted of multiple lateral branches, spaced fairly regularly apart, along the primary germ tubes as well as some lateral branch formation off the major secondary hyphae. This growth response was identical to that observed when germinated spores were allowed to grow towards cultured carrot roots in vitro. This response to 2OH-TDA also was observed with an unidentified Gigaspora species but no morphological response was observed with Glomus intraradices Schenck and Smith. The results indicate that 2-hydroxy fatty acids are another putative category of root exudate signals perceived by Gigaspora species, stimulating an increase in elongated lateral branches.
DOI: 10.1016/j.funbio.2011.01.006
PubMed: 21530917
Links to Exploration step
pubmed:21530917Le document en format XML
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Douds</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2011">2011 Apr-May</date><idno type="RBID">pubmed:21530917</idno><idno type="pmid">21530917</idno><idno type="doi">10.1016/j.funbio.2011.01.006</idno><idno type="wicri:Area/Main/Corpus">002325</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">002325</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">The effects of hydroxy fatty acids on the hyphal branching of germinated spores of AM fungi.</title><author><name sortKey="Nagahashi, Gerald" sort="Nagahashi, Gerald" uniqKey="Nagahashi G" first="Gerald" last="Nagahashi">Gerald Nagahashi</name><affiliation><nlm:affiliation>Eastern Regional Research Center, USDA, ARS, ERRC, 600 E. Mermaid Lane, Wyndmoor, PA 19038 USA.</nlm:affiliation></affiliation></author><author><name sortKey="Douds, David D" sort="Douds, David D" uniqKey="Douds D" first="David D" last="Douds">David D. Douds</name></author></analytic><series><title level="j">Fungal biology</title><idno type="ISSN">1878-6146</idno></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Daucus carota (chemistry)</term><term>Decanoates (chemistry)</term><term>Hydroxy Acids (chemistry)</term><term>Hyphae (growth & development)</term><term>Mycorrhizae (growth & development)</term><term>Mycorrhizae (physiology)</term><term>Plant Exudates (chemistry)</term><term>Plant Roots (chemistry)</term><term>Spores, Fungal (growth & development)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Decanoates</term><term>Hydroxy Acids</term><term>Plant Exudates</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Daucus carota</term><term>Plant Roots</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Hyphae</term><term>Mycorrhizae</term><term>Spores, Fungal</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Mycorrhizae</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Two hydroxy fatty acids, tentatively identified previously in carrot root exudates, were tested for their effects on hyphal growth of the arbuscular mycorrhizal (AM) fungus, Gigaspora gigantea (Nicol. and Gerd.) Gerdemann and Trappe. Best results were achieved with a long-term bioassay (7-8d) with nanomolar concentrations throughout the Petri dish in contrast to the rapid microinjection bioassay (16-24h) in which nanogram quantities were injected near growing hyphal tips. When 5nM 2-hydroxy fatty acids of various chain length were tested, the length of the hydroxyl fatty acid was significant since only 2-hydroxytetradecanoic acid (2OH-TDA) and to a slightly lesser degree, 2-hydroxydodecanoic acid (2OH-DDA) induced a hyphal growth response while 2-hydroxydecanoic acid (2OH-DA) and 2-hydroxyhexadecanoic (2OH-HDA) acid did not. The position of the hydroxyl group was critical since 5nM 3-hydroxytetradecanoic acid (3OH-TDA) had no effect on hyphal growth. The length of the non-hydroxy containing straight chain fatty acid, per se, did not appear significant since none of these fatty acids had an effect on hyphal growth. The morphological growth response promoted by 2OH-TDA consisted of multiple lateral branches, spaced fairly regularly apart, along the primary germ tubes as well as some lateral branch formation off the major secondary hyphae. This growth response was identical to that observed when germinated spores were allowed to grow towards cultured carrot roots in vitro. This response to 2OH-TDA also was observed with an unidentified Gigaspora species but no morphological response was observed with Glomus intraradices Schenck and Smith. The results indicate that 2-hydroxy fatty acids are another putative category of root exudate signals perceived by Gigaspora species, stimulating an increase in elongated lateral branches.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21530917</PMID><DateCompleted><Year>2011</Year><Month>07</Month><Day>18</Day></DateCompleted><DateRevised><Year>2011</Year><Month>05</Month><Day>02</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">1878-6146</ISSN><JournalIssue CitedMedium="Internet"><Volume>115</Volume><Issue>4-5</Issue><PubDate><MedlineDate>2011 Apr-May</MedlineDate></PubDate></JournalIssue><Title>Fungal biology</Title><ISOAbbreviation>Fungal Biol</ISOAbbreviation></Journal><ArticleTitle>The effects of hydroxy fatty acids on the hyphal branching of germinated spores of AM fungi.</ArticleTitle><Pagination><MedlinePgn>351-8</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.funbio.2011.01.006</ELocationID><Abstract><AbstractText>Two hydroxy fatty acids, tentatively identified previously in carrot root exudates, were tested for their effects on hyphal growth of the arbuscular mycorrhizal (AM) fungus, Gigaspora gigantea (Nicol. and Gerd.) Gerdemann and Trappe. Best results were achieved with a long-term bioassay (7-8d) with nanomolar concentrations throughout the Petri dish in contrast to the rapid microinjection bioassay (16-24h) in which nanogram quantities were injected near growing hyphal tips. When 5nM 2-hydroxy fatty acids of various chain length were tested, the length of the hydroxyl fatty acid was significant since only 2-hydroxytetradecanoic acid (2OH-TDA) and to a slightly lesser degree, 2-hydroxydodecanoic acid (2OH-DDA) induced a hyphal growth response while 2-hydroxydecanoic acid (2OH-DA) and 2-hydroxyhexadecanoic (2OH-HDA) acid did not. The position of the hydroxyl group was critical since 5nM 3-hydroxytetradecanoic acid (3OH-TDA) had no effect on hyphal growth. The length of the non-hydroxy containing straight chain fatty acid, per se, did not appear significant since none of these fatty acids had an effect on hyphal growth. The morphological growth response promoted by 2OH-TDA consisted of multiple lateral branches, spaced fairly regularly apart, along the primary germ tubes as well as some lateral branch formation off the major secondary hyphae. This growth response was identical to that observed when germinated spores were allowed to grow towards cultured carrot roots in vitro. This response to 2OH-TDA also was observed with an unidentified Gigaspora species but no morphological response was observed with Glomus intraradices Schenck and Smith. The results indicate that 2-hydroxy fatty acids are another putative category of root exudate signals perceived by Gigaspora species, stimulating an increase in elongated lateral branches.</AbstractText><CopyrightInformation>Published by Elsevier Ltd.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Nagahashi</LastName><ForeName>Gerald</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>Eastern Regional Research Center, USDA, ARS, ERRC, 600 E. Mermaid Lane, Wyndmoor, PA 19038 USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Douds</LastName><ForeName>David D</ForeName><Initials>DD</Initials><Suffix>Jr</Suffix></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2011</Year><Month>02</Month><Day>01</Day></ArticleDate></Article><MedlineJournalInfo><Country>Netherlands</Country><MedlineTA>Fungal Biol</MedlineTA><NlmUniqueID>101524465</NlmUniqueID></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D003651">Decanoates</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D006880">Hydroxy Acids</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D053147">Plant Exudates</NameOfSubstance></Chemical><Chemical><RegistryNumber>5393-81-7</RegistryNumber><NameOfSubstance UI="C024706">2-hydroxydecanoic acid</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D018552" MajorTopicYN="N">Daucus carota</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D003651" MajorTopicYN="N">Decanoates</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006880" MajorTopicYN="N">Hydroxy Acids</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D025301" MajorTopicYN="N">Hyphae</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D038821" MajorTopicYN="N">Mycorrhizae</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D053147" MajorTopicYN="N">Plant Exudates</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013172" MajorTopicYN="N">Spores, Fungal</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2010</Year><Month>11</Month><Day>01</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2010</Year><Month>12</Month><Day>15</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2011</Year><Month>01</Month><Day>21</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2011</Year><Month>5</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2011</Year><Month>5</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>7</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">21530917</ArticleId><ArticleId IdType="pii">S1878-6146(11)00010-9</ArticleId><ArticleId IdType="doi">10.1016/j.funbio.2011.01.006</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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