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dc.contributor.authorLiu, Junwei
dc.contributor.authorHe, Hanzi
dc.contributor.authorVitali, Marco
dc.contributor.authorVisentin, Ivan
dc.contributor.authorCharnikhova, Tatsiana V.
dc.contributor.authorHaider, Imran
dc.contributor.authorSchubert, Andrea
dc.contributor.authorRuyter-Spira, Carolien P.
dc.contributor.authorBouwmeester, Harro J J
dc.contributor.authorLovisolo, Claudio
dc.contributor.authorCardinale, Francesca
dc.date.accessioned2015-08-12T09:29:54Z
dc.date.available2015-08-12T09:29:54Z
dc.date.issued2015-02-26
dc.identifier.citationLiu, J., He, H., Vitali, M., Visentin, I., Charnikhova, T., Haider, I., … Cardinale, F. (2015). Osmotic stress represses strigolactone biosynthesis in Lotus japonicus roots: exploring the interaction between strigolactones and ABA under abiotic stress. Planta, 241(6), 1435–1451. doi:10.1007/s00425-015-2266-8
dc.identifier.issn00320935
dc.identifier.doi10.1007/s00425-015-2266-8
dc.identifier.urihttp://hdl.handle.net/10754/566142
dc.description.abstractMain conclusion: Strigolactone changes and cross talk with ABA unveil a picture of root-specific hormonal dynamics under stress.Abstract: Strigolactones (SLs) are carotenoid-derived hormones influencing diverse aspects of development and communication with (micro)organisms, and proposed as mediators of environmental stimuli in resource allocation processes; to contribute to adaptive adjustments, therefore, their pathway must be responsive to environmental cues. To investigate the relationship between SLs and abiotic stress in Lotus japonicus, we compared wild-type and SL-depleted plants, and studied SL metabolism in roots stressed osmotically and/or phosphate starved. SL-depleted plants showed increased stomatal conductance, both under normal and stress conditions, and impaired resistance to drought associated with slower stomatal closure in response to abscisic acid (ABA). This confirms that SLs contribute to drought resistance in species other than Arabidopsis. However, we also observed that osmotic stress rapidly and strongly decreased SL concentration in tissues and exudates of wild-type Lotus roots, by acting on the transcription of biosynthetic and transporter-encoding genes and independently of phosphate abundance. Pre-treatment with exogenous SLs inhibited the osmotic stress-induced ABA increase in wild-type roots and down-regulated the transcription of the ABA biosynthetic gene LjNCED2. We propose that a transcriptionally regulated, early SL decrease under osmotic stress is needed (but not sufficient) to allow the physiological increase of ABA in roots. This work shows that SL metabolism and effects on ABA are seemingly opposite in roots and shoots under stress.
dc.publisherSpringer Nature
dc.subjectCarotenoid cleavage enzymes
dc.subjectCCD7
dc.subjectCCD8
dc.subjectD27
dc.subjectDrought
dc.subjectGR24 (synthetic strigolactone analogue)
dc.subjectMAX1
dc.subjectNCED
dc.subjectPDR1
dc.subjectPhosphate starvation
dc.subjectStomatal conductance
dc.titleOsmotic stress represses strigolactone biosynthesis in Lotus japonicus roots: exploring the interaction between strigolactones and ABA under abiotic stress
dc.typeArticle
dc.contributor.departmentBiological and Environmental Science and Engineering (BESE) Division
dc.contributor.departmentCenter for Desert Agriculture
dc.identifier.journalPlanta
dc.contributor.institutionDepartment of Agricultural, Forest and Food Sciences (DISAFA), University of Turin, Largo P. Braccini 2Grugliasco, TO, Italy
dc.contributor.institutionLaboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1Wageningen, Netherlands
dc.contributor.institutionBusiness Unit Bioscience, Plant Research International, Droevendaalsesteeg 1Wageningen, Netherlands
kaust.personHaider, Imran
dc.date.published-online2015-02-26
dc.date.published-print2015-06


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