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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

2020-07-09Artigo científico Acesso aberto
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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.authorSimões-Costa, Maria C.
dc.contributor.authorMoura, Isabel
dc.contributor.authorPais, Isabel P.
dc.contributor.authorScotti-Campos, Paula
dc.contributor.authorPartelli, Fábio L.
dc.contributor.authorCampostrini, Eliemar
dc.contributor.authorRibeiro-Barros, Ana I.
dc.contributor.authorDaMatta, Fábio M.
dc.contributor.authorRamalho, José C.
dc.contributor.institutionGeoBioTec - Geobiociências, Geoengenharias e Geotecnologias
dc.contributor.pblFrontiers Media
dc.date.accessioned2021-07-12T22:18:01Z
dc.date.available2021-07-12T22:18:01Z
dc.date.issued2020-07-09
dc.descriptionNo 727934 PTDC/ASP-AGR/31257/2017 UIDB/00239/2020 UIDP/04035/2020 E-26/202.323/2017
dc.description.abstractThis study unveils the single and combined drought and heat impacts on the photosynthetic performance of Coffea arabica cv. Icatu and C. canephora cv. 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°C, day/night), and thereafter exposed to a gradual temperature rise up to 42/30°C, followed by a 14-day water and temperature recovery. Single drought affected all gas exchanges (including Amax) and most fluorescence parameters in both genotypes. However, Icatu maintained Fv/Fm 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 (b559, f, b563) contents in CL153. Remarkable heat tolerance in potential photosynthetic functioning was detected in WW plants of both genotypes (up to 37/28°C or 39/30°C), likely associated with CEF in Icatu. Yet, at 42/30°C the tolerance limit was exceeded. Reduced Amax and increased Ci values reflected non-stomatal limitations of photosynthesis, agreeing with impairments in energy capture (F0 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°C, stresses interaction was largely absent, and drought played the major role in constraining photosynthesis functioning. Harsher conditions (SWD, 42/30°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°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.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent1252595
dc.identifier.doi10.3389/fpls.2020.01049
dc.identifier.issn1664-462X
dc.identifier.otherPURE: 32496633
dc.identifier.otherPURE UUID: d22b4bb2-56fe-442f-9b65-f89c2e555f69
dc.identifier.otherScopus: 85088441596
dc.identifier.otherPubMed: 2733525
dc.identifier.otherPubMedCentral: PMC7363965
dc.identifier.otherWOS: 000555807200001
dc.identifier.urihttp://hdl.handle.net/10362/120916
dc.identifier.urlhttps://www.scopus.com/pages/publications/85088441596
dc.language.isoeng
dc.peerreviewedyes
dc.subjectacclimation
dc.subjectclimate change
dc.subjectcoffee
dc.subjectdrought
dc.subjectheat
dc.subjectphotoinhibition
dc.subjectphotosynthesis
dc.subjectPlant Science
dc.subjectSDG 13 - Climate Action
dc.titleResilient and Sensitive Key Points of the Photosynthetic Machinery of Coffea spp. to the Single and Superimposed Exposure to Severe Drought and Heat Stressesen
dc.typejournal article
degois.publication.titleFrontiers in Plant Science
degois.publication.volume11
dspace.entity.typePublication
rcaap.rightsopenAccess

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