Day and Night Fluctuations in GABA Biosynthesis Contribute to Drought Responses in Nicotiana tabacum L

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dc.authoridTURKAN, ISMAIL/0000-0001-9042-6870
dc.authoridBOR, MELIKE/0000-0002-0170-2800
dc.authorwosidYolcu, Seher/ABG-9341-2021
dc.contributor.authorPelvan, Alpay
dc.contributor.authorBor, Melike
dc.contributor.authorYolcu, Seher
dc.contributor.authorOzdemir, Filiz
dc.contributor.authorTurkan, Ismail
dc.date.accessioned2023-01-12T20:00:01Z
dc.date.available2023-01-12T20:00:01Z
dc.date.issued2021
dc.departmentN/A/Departmenten_US
dc.description.abstractWhen synchronized with the light/dark cycle the circadian rhythm is termed a diurnal rhythm and this organizes an organism's daily life cycle in relation to the metabolic shifts during the day/night cycles. This is a complex task, particularly under stress conditions. Accurate maintenance of the diurnal rhythm becomes an issue under environmental extremes, such as drought due to the impairment of metabolism, redox balance, and structural integrity. In plants, the non-proteinogenic amino acid GABA accumulates to high levels in response to several stress factors but this is not always dependent on the activation of its biosynthesis. Here we propose a regulatory role to GABA during the diurnal rhythm in plants which is similar to its function in animals where it adjusts the circadian rhythm. Here we investigated whether GABA-biosynthesis was affected by drought stress during the diurnal cycle. For this, we took samples from leaves of N. tabacum plants subjected to PEG-mediated drought stress (-0.73 MPa) during the day and night cycle during a 24 hour period. Glutamate, GABA, and proline contents, along with GDH, GAD enzyme activities and transcript profiles were analyzed. Overall, we conclude that the oscillations in GABA biosynthesis during day and night cycle have an impact on drought stress responses which needs to be elucidated by further analysis.en_US
dc.description.sponsorshipEge University Research Foundation [14-FEN-045]en_US
dc.description.sponsorshipThe authors thank to Prof. Steven Footitt for his critical reading and helpful contributions to the manuscript. This work was supported by grant-in-aid 14-FEN-045 from Ege University Research Foundation.en_US
dc.identifier.doi10.1080/15592324.2021.1899672
dc.identifier.issn1559-2316
dc.identifier.issn1559-2324
dc.identifier.issue5en_US
dc.identifier.pmid33704006en_US
dc.identifier.urihttps://doi.org/10.1080/15592324.2021.1899672
dc.identifier.urihttps://hdl.handle.net/11454/77273
dc.identifier.volume16en_US
dc.identifier.wosWOS:000627650300001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherTaylor & Francis Incen_US
dc.relation.ispartofPlant Signaling & Behavioren_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectOsmotic stressen_US
dc.subjectgamma-aminobutyric aciden_US
dc.subjectglutamateen_US
dc.subjectprolineen_US
dc.subjectcircadian rhythmen_US
dc.subjectAminobutyric-Acid Gabaen_US
dc.subjectGamma-Aminobutyrateen_US
dc.subjectStress Responsesen_US
dc.subjectCircadian Clocksen_US
dc.subjectEvening Complexen_US
dc.subjectPlant-Responsesen_US
dc.subjectWild-Typeen_US
dc.subjectMetabolismen_US
dc.subjectGlutamateen_US
dc.subjectProlineen_US
dc.titleDay and Night Fluctuations in GABA Biosynthesis Contribute to Drought Responses in Nicotiana tabacum Len_US
dc.typeArticleen_US

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