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Resilient and sensitive key points of the photosynthetic machinery of coffea spp. to the single and superimposed exposure to severe drought and heat stresses

2020-07-09Journal article Open access
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dc.contributor.authorDubberstein, Danielly
dc.contributor.authorLidon, Fernando C.
dc.contributor.authorRodrigues, Ana P.
dc.contributor.authorSemedo, José N.
dc.contributor.authorMarques, Isabel
dc.contributor.authorRodrigues, Weverton P.
dc.contributor.authorGouveia, Duarte
dc.contributor.authorARMENGAUD, Jean
dc.contributor.authorSemedo, Magda C.
dc.contributor.authorMartins, Sónia
dc.contributor.authorSimoes-Costa, Maria C.
dc.contributor.authorMoura, Isabel
dc.contributor.authorPais, Isabel P.
dc.contributor.authorScotti-Campos, Paula
dc.contributor.authorPartelli, Fábio Luiz
dc.contributor.authorE, Campostrini
dc.contributor.authorRibeiro-Barros, Ana I.
dc.contributor.authorDaMatta, Fabio
dc.contributor.authorRamalho, José C.
dc.date.accessioned2021-01-21T12:32:36Z
dc.date.available2021-01-21T12:32:36Z
dc.date.issued2020-07-09
dc.description.abstractThis study unveils the single and combined drought and heat impacts on the photosynthetic performance ofCoffea arabicacv. Icatu andC. canephoracv. Conilon Clone 153 (CL153). Well-watered (WW) potted plants were gradually submitted to severe water deficit (SWD) along 20 days under adequate temperature (25/20 degrees C, day/night), and thereafter exposed to a gradual temperature rise up to 42/30 degrees C, followed by a 14-day water and temperature recovery. Single drought affected all gas exchanges (includingA(max)) and most fluorescence parameters in both genotypes. However, Icatu maintainedF(v)/F(m)and RuBisCO activity, and reinforced electron transport rates, carrier contents, and proton gradient regulation (PGR5) and chloroplast NADH dehydrogenase-like (NDH) complex proteins abundance. This suggested negligible non-stomatal limitations of photosynthesis that were accompanied by a triggering of protective cyclic electron transport (CEF) involving both photosystems (PSs). These findings contrasted with declines in RuBisCO and PSs activities, and cytochromes (b(559),f,b(563)) contents in CL153. Remarkable heat tolerance in potential photosynthetic functioning was detected in WW plants of both genotypes (up to 37/28 degrees C or 39/30 degrees C), likely associated with CEF in Icatu. Yet, at 42/30 degrees C the tolerance limit was exceeded. ReducedA(max)and increasedC(i)values reflected non-stomatal limitations of photosynthesis, agreeing with impairments in energy capture (F(0)rise), PSII photochemical efficiency, and RuBisCO and Ru5PK activities. In contrast to PSs activities and electron carrier contents, enzyme activities were highly heat sensitive. Until 37/28 degrees C, stresses interaction was largely absent, and drought played the major role in constraining photosynthesis functioning. Harsher conditions (SWD, 42/30 degrees C) exacerbated impairments to PSs, enzymes, and electron carriers, but uncontrolled energy dissipation was mitigated by photoprotective mechanisms. Most parameters recovered fully between 4 and 14 days after stress relief in both genotypes, although some aftereffects persisted in SWD plants. Icatu was more drought tolerant, with WW and SWD plants usually showing a faster and/or greater recovery than CL153. Heat affected both genotypes mostly at 42/30 degrees C, especially in SWD and Icatu plants. Overall, photochemical components were highly tolerant to heat and to stress interaction in contrast to enzymes that deserve special attention by breeding programs to increase coffee sustainability in climate change scenarios.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDUBBERSTEIN, Danielly; [et al] – Resilient and sensitive key points of the photosynthetic machinery of coffea spp. to the single and superimposed exposure to severe drought and heat stresses. Frontiers in Plant Science. ISSN 1664-462X. Vol. 11 (2020), pp. 1-22pt_PT
dc.identifier.doi10.3389/fpls.2020.01049pt_PT
dc.identifier.issn1664-462X
dc.identifier.urihttp://hdl.handle.net/10400.21/12662
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherFRONTIERS MEDIA SApt_PT
dc.relationPTDC/ASP-AGR/31257/2017 - FCTpt_PT
dc.relationBREEDing Coffee for AgroForestry Systems
dc.relationUIDP/04035/2020 - FCTpt_PT
dc.relationE-26/202.323/2017 - Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ)pt_PT
dc.subjectAcclimationpt_PT
dc.subjectClimate changept_PT
dc.subjectCoffeept_PT
dc.subjectDroughtpt_PT
dc.subjectHeatpt_PT
dc.subjectPhotoinhibitionpt_PT
dc.subjectPhotosynthesispt_PT
dc.titleResilient and sensitive key points of the photosynthetic machinery of coffea spp. to the single and superimposed exposure to severe drought and heat stressespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleBREEDing Coffee for AgroForestry Systems
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/727934/EU
oaire.citation.endPage22pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleFrontiers in Plant Sciencept_PT
oaire.citation.volume11pt_PT
oaire.fundingStreamH2020
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project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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