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Drought and salinity: A comparison of their effects on the ammonium‐preferring species Spartina alterniflora

2021-06Artigo científico Acesso aberto
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dc.contributor.authorHessini, Kamel
dc.contributor.authorJeddi, Kaouthar
dc.contributor.authorSiddique, Kadambot H. M.
dc.contributor.authorCruz, Cristina
dc.date.accessioned2021-09-29T19:18:38Z
dc.date.available2022-06-04T00:30:28Z
dc.date.issued2021-06
dc.description.abstractDrought and salinity are the most serious environmental factors affecting crop productivity worldwide; hence, it is important to select and develop both salt- and drought-tolerant crops. The perennial smooth cordgrass Spartina alterniflora Loisel is unusual in that it is highly salt-tolerant and seems to prefer ammonium (NH4+) over nitrate (NO3−) as an inorganic N source. In this study, we determined whether Spartina's unique preference for NH4+ enhances performance under salt and drought stress. Greenhouse experiments were conducted to compare the interactive effects of N source, salinity, and low water availability on plant performance (growth and antioxidant metabolism). Drought significantly reduced growth and photosynthetic activity in S. alterniflora, more so with NH4+ than NO3−; in contrast, NH4+ enhanced growth under high salinity. The increased tolerance of S. alterniflora to salt stress in the presence of NH4+ was linked to a high level of antioxidant enzyme activity, combined with low MDA content, EL, and H2O2 production. In contrast, drought stress negated the growth advantages for S. alterniflora exposed to salt stress in the presence of NH4+. The susceptibility of S. alterniflora to drought was partly due to reduced antioxidant enzyme activities, thereby reducing the defense against the oxidative damages induced by osmotic stress. In conclusion, in contrast to salt stress, drought stress negates the beneficial effects of ammonium as an N source in the C4 plant Spartina alterniflora.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationHessini, K, Jeddi, K, Siddique, KHM, Cruz, C. Drought and salinity: A comparison of their effects on the ammonium-preferring species Spartina alterniflora. Physiologia Plantarum. 2021; 172: 431– 440. https://doi.org/10.1111/ppl.13241pt_PT
dc.identifier.doi10.1111/ppl.13241pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/49706
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWileypt_PT
dc.relationTURSP-2020/94pt_PT
dc.relation.publisherversionhttps://onlinelibrary.wiley.com/doi/10.1111/ppl.13241pt_PT
dc.titleDrought and salinity: A comparison of their effects on the ammonium‐preferring species Spartina alterniflorapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage440pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage431pt_PT
oaire.citation.titlePhysiologia Plantarumpt_PT
oaire.citation.volume172pt_PT
person.familyNameCruz
person.givenNameCristina
person.identifier.ciencia-idE416-7201-8A84
person.identifier.orcid0000-0003-3100-463X
rcaap.embargofctO tipo de licença envolvido com a editora Wiley para esta revista, não envolvendo pagamento (APC), apenas permite acesso em repositório público do formato 'aceite' (i.e não editado e paginado pela editora) após período de embargo de 12 meses após a data da sua publicação final.pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationa22a48ab-1c74-450c-a512-cdd10abd962b
relation.isAuthorOfPublication.latestForDiscoverya22a48ab-1c74-450c-a512-cdd10abd962b

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