Variable effects of arbuscular mycorrhizal fungal inoculation on physiological and molecular measures of root and stomatal conductance of diverse Medicago truncatula accessions

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dc.contributor.authorWatts-Williams, S.
dc.contributor.authorCavagnaro, T.
dc.contributor.authorTyerman, S.
dc.date.issued2019
dc.description.abstractAssociation with arbuscular mycorrhizal fungi (AMF) can impact on plant water relations; mycorrhizal plants can exhibit increased stomatal conductance (gs ) and root hydraulic conductance (normalized to root dry weight, Lo ), and altered expression of aquaporins (AQP). Many factors regulate such responses; however, plant intraspecific diversity effects have yet to be explored. Twenty geographically diverse accessions of Medicago truncatula were inoculated with the AMF Funneliformis mosseae or mock-inoculated, and grown under well-watered conditions. Biomass, gs , shoot nutrient concentrations and mycorrhizal colonization were measured in all accessions, and Lo and gene expression in five accessions. The diverse accessions varied in physiology and gene expression; some accessions were also larger or had higher gs when colonized by F. mosseae. In the five accessions, Lo was higher in two accessions when colonized by AMF and also maintained within a much smaller range than the mock-inoculated plants. Expression of MtPIP1 correlated with both gs and Lo , and when plants were more than 3% colonized, mycorrhizal colonization correlated with Lo . Accession and AMF treatments had profound effects on M. truncatula, including several measures of plant water relations. Correlations between response variables, especially between molecular and physiological variables, across genotypes, highlight the findings of this study.
dc.description.statementofresponsibilityStephanie J. Watts, Williams, Timothy R. Cavagnaro, Stephen D. Tyerman
dc.identifier.citationPlant, Cell and Environment, 2019; 42(1):285-294
dc.identifier.doi10.1111/pce.13369
dc.identifier.issn0140-7791
dc.identifier.issn1365-3040
dc.identifier.orcidWatts-Williams, S. [0000-0003-3467-0662]
dc.identifier.orcidCavagnaro, T. [0000-0002-9922-5677]
dc.identifier.orcidTyerman, S. [0000-0003-2455-1643]
dc.identifier.urihttp://hdl.handle.net/2440/117707
dc.language.isoen
dc.publisherJohn Wiley & Sons
dc.relation.granthttp://purl.org/au-research/grants/arc/CE140100008
dc.rights© 2018 John Wiley & Sons Ltd.
dc.source.urihttps://doi.org/10.1111/pce.13369
dc.subjectFunneliformis mosseae
dc.subjectaquaporin
dc.subjectphosphate transporter
dc.subjectwater relations
dc.titleVariable effects of arbuscular mycorrhizal fungal inoculation on physiological and molecular measures of root and stomatal conductance of diverse Medicago truncatula accessions
dc.typeJournal article
pubs.publication-statusPublished

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