Plasticity and Constraints On Fatty Acid Composition in the Phospholipids and Triacylglycerols of Arabidopsis Accessions Grown at Different Temperatures

dc.contributor.utaustinauthorSanyal, Anushreeen_US
dc.contributor.utaustinauthorLinder, Craig Randalen_US
dc.creatorSanyal, Anushreeen_US
dc.creatorLinder, Craig Randalen_US
dc.date.accessioned2016-10-28T19:49:29Z
dc.date.available2016-10-28T19:49:29Z
dc.date.issued2013-04en_US
dc.description.abstractNatural selection acts on multiple traits in an organism, and the final outcome of adaptive evolution may be constrained by the interaction of physiological and functional integration of those traits. Fatty acid composition is an important determinant of seed oil quality. In plants the relative proportions of unsaturated fatty acids in phospholipids and seed triacylglycerols often increases adaptively in response to lower growing temperatures to increase fitness. Previous work produced evidence of genetic constraints between phospholipids and triacylglycerols in the widely studied Arabidopsis lines Col and Ler, but because these lines are highly inbred, the correlations might be spurious. In this study, we grew 84 wild Arabidopsis accessions at two temperatures to show that genetic correlation between the fatty acids of the two lipid types is not expected and one should not influence the other and seed oil evolution and also tested for the adaptive response of fatty acids to latitude and temperature. Results: As expected no significant correlations between the two lipids classes at either growing temperature were observed. The saturated fatty acids and erucic acid of triacylglycerols followed a significant latitudinal cline, while the fatty acids in phospholipids did not respond to latitude as expected. The expected plastic response to temperature was observed for all the triacylglycerol fatty acids whereas only oleic acid showed the expected pattern in phospholipids. Considerable phenotypic variation of the fatty acids in both the lipid types was seen. Conclusion: We report the first evidence supporting adaptive evolution of seed triacylglycerols in Arabidopsis on a latitudinal cline as seen in other species and also their plastic adaptive response to growing temperature. We show that as expected there is no genetic correlations between the fatty acids in triacylglycerols and phospholipids, indicating selection can act on seed triacylglycerols without being constrained by the fatty acid requirements of the phospholipids. Phospholipid fatty acids do not respond to latitude and temperature as seen elsewhere and needs further investigation. Thus, the adaptive response of Arabidopsis and the genetic tools available for manipulating Arabidopsis, makes it an excellent system for studying seed oil evolution and also for breeding seed oil crops especially the Brassica species.en_US
dc.description.departmentIntegrative Biologyen_US
dc.description.sponsorshipen_US
dc.identifierdoi:10.15781/T2HD7NW01
dc.identifier.citationSanyal, Anushree, and Craig Randal Linder. "Plasticity and constraints on fatty acid composition in the phospholipids and triacylglycerols of Arabidopsis accessions grown at different temperatures." BMC plant biology, Vol. 13, No. 1 (Apr., 2013): 1.en_US
dc.identifier.doi10.1186/1471-2229-13-63en_US
dc.identifier.issn1471-2229en_US
dc.identifier.urihttp://hdl.handle.net/2152/43149
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialBMC Plant Biologyen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectseed oil evolutionen_US
dc.subjectfatty aciden_US
dc.subjecttriacylglycerolsen_US
dc.subjectphospholipidsen_US
dc.subjectarabidopsisen_US
dc.subjectmembrane-lipid-compositionen_US
dc.subjectseed oil compositionen_US
dc.subjectplasma-membraneen_US
dc.subjectcold-acclimationen_US
dc.subjectlatitudinal variationen_US
dc.subjectadaptive evolutionen_US
dc.subjectplanten_US
dc.subjectlipidsen_US
dc.subjectthalianaen_US
dc.subjectmutantsen_US
dc.subjectgenomeen_US
dc.subjectplant sciencesen_US
dc.titlePlasticity and Constraints On Fatty Acid Composition in the Phospholipids and Triacylglycerols of Arabidopsis Accessions Grown at Different Temperaturesen_US
dc.typeArticleen_US

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