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Rodrigues AP, Pais IP, Leitão AE, Dubberstein D, Lidon FC, Marques I, Semedo JN, Rakocevic M, Scotti-Campos P, Campostrini E, Rodrigues WP, Simões-Costa MC, Reboredo FH, Partelli FL, DaMatta FM, Ribeiro-Barros AI, Ramalho JC. Uncovering the wide protective responses in Coffea spp. leaves to single and superimposed exposure of warming and severe water deficit. FRONTIERS IN PLANT SCIENCE 2024; 14:1320552. [PMID: 38259931 PMCID: PMC10801242 DOI: 10.3389/fpls.2023.1320552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 11/30/2023] [Indexed: 01/24/2024]
Abstract
Climate changes boosted the frequency and severity of drought and heat events, with aggravated when these stresses occur simultaneously, turning crucial to unveil the plant response mechanisms to such harsh conditions. Therefore, plant responses/resilience to single and combined exposure to severe water deficit (SWD) and heat were assessed in two cultivars of the main coffee-producing species: Coffea arabica cv. Icatu and C. canephora cv. Conilon Clone 153 (CL153). Well-watered plants (WW) were exposed to SWD under an adequate temperature of 25/20°C (day/night), and thereafter submitted to a gradual increase up to 42/30°C, and a 14-d recovery period (Rec14). Greater protective response was found to single SWD than to single 37/28°C and/or 42/30°C (except for HSP70) in both cultivars, but CL153-SWD plants showed the larger variations of leaf thermal imaging crop water stress index (CWSI, 85% rise at 37/28°C) and stomatal conductance index (IG, 66% decline at 25/20°C). Both cultivars revealed great resilience to SWD and/or 37/28°C, but a tolerance limit was surpassed at 42/30°C. Under stress combination, Icatu usually displayed lower impacts on membrane permeability, and PSII function, likely associated with various responses, usually mostly driven by drought (but often kept or even strengthened under SWD and 42/30°C). These included the photoprotective zeaxanthin and lutein, antioxidant enzymes (superoxide dismutase, Cu,Zn-SOD; ascorbate peroxidase, APX), HSP70, arabinose and mannitol (involving de novo sugar synthesis), contributing to constrain lipoperoxidation. Also, only Icatu showed a strong reinforcement of glutathione reductase activity under stress combination. In general, the activities of antioxidative enzymes declined at 42/30°C (except Cu,Zn-SOD in Icatu and CAT in CL153), but HSP70 and raffinose were maintained higher in Icatu, whereas mannitol and arabinose markedly increased in CL153. Overall, a great leaf plasticity was found, especially in Icatu that revealed greater responsiveness of coordinated protection under all experimental conditions, justifying low PIChr and absence of lipoperoxidation increase at 42/30°C. Despite a clear recovery by Rec14, some aftereffects persisted especially in SWD plants (e.g., membranes), relevant in terms of repeated stress exposure and full plant recovery to stresses.
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Affiliation(s)
- Ana P. Rodrigues
- Laboratório de Interações Planta-Ambiente e Biodiversidade (PlantStress & Biodiversity), Centro de Estudos Florestais (CEF), Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Oeiras, Lisboa, Portugal
- Laboratório Associado TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Lisboa, Portugal
| | - Isabel P. Pais
- Unidade de Investigação em Biotecnologia e Recursos Genéticos, Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV), Oeiras, Portugal
- Unidade de GeoBiociências, GeoEngenharias e GeoTecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Caparica, Portugal
| | - António E. Leitão
- Laboratório de Interações Planta-Ambiente e Biodiversidade (PlantStress & Biodiversity), Centro de Estudos Florestais (CEF), Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Oeiras, Lisboa, Portugal
- Laboratório Associado TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Lisboa, Portugal
- Unidade de GeoBiociências, GeoEngenharias e GeoTecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Caparica, Portugal
| | - Danielly Dubberstein
- Laboratório de Interações Planta-Ambiente e Biodiversidade (PlantStress & Biodiversity), Centro de Estudos Florestais (CEF), Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Oeiras, Lisboa, Portugal
- Laboratório Associado TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Lisboa, Portugal
- Centro Univ. Norte do Espírito Santo (CEUNES), Dept. Ciências Agrárias e Biológicas (DCAB), Univ. Federal Espírito Santo (UFES), São Mateus, ES, Brazil
- Assistência Técnica e Gerencial em Cafeicultura - Serviço Nacional de Aprendizagem Rural (SENAR), Porto Velho, RO, Brazil
| | - Fernando C. Lidon
- Unidade de GeoBiociências, GeoEngenharias e GeoTecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Caparica, Portugal
| | - Isabel Marques
- Laboratório de Interações Planta-Ambiente e Biodiversidade (PlantStress & Biodiversity), Centro de Estudos Florestais (CEF), Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Oeiras, Lisboa, Portugal
- Laboratório Associado TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Lisboa, Portugal
| | - José N. Semedo
- Unidade de Investigação em Biotecnologia e Recursos Genéticos, Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV), Oeiras, Portugal
- Unidade de GeoBiociências, GeoEngenharias e GeoTecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Caparica, Portugal
| | - Miroslava Rakocevic
- Centro Univ. Norte do Espírito Santo (CEUNES), Dept. Ciências Agrárias e Biológicas (DCAB), Univ. Federal Espírito Santo (UFES), São Mateus, ES, Brazil
| | - Paula Scotti-Campos
- Unidade de Investigação em Biotecnologia e Recursos Genéticos, Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV), Oeiras, Portugal
- Unidade de GeoBiociências, GeoEngenharias e GeoTecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Caparica, Portugal
| | - Eliemar Campostrini
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Rio de Janeiro, Brazil
| | - Weverton P. Rodrigues
- Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Rio de Janeiro, Brazil
- Centro de Ciências Agrárias, Naturais e Letras, Universidade Estadual da Região Tocantina do Maranhão, Maranhão, Brazil
| | - Maria Cristina Simões-Costa
- Laboratório de Interações Planta-Ambiente e Biodiversidade (PlantStress & Biodiversity), Centro de Estudos Florestais (CEF), Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Oeiras, Lisboa, Portugal
- Laboratório Associado TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Lisboa, Portugal
| | - Fernando H. Reboredo
- Unidade de GeoBiociências, GeoEngenharias e GeoTecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Caparica, Portugal
| | - Fábio L. Partelli
- Centro Univ. Norte do Espírito Santo (CEUNES), Dept. Ciências Agrárias e Biológicas (DCAB), Univ. Federal Espírito Santo (UFES), São Mateus, ES, Brazil
| | - Fábio M. DaMatta
- Departamento de Biologia Vegetal, Universidade Federal Viçosa (UFV), Viçosa, MG, Brazil
| | - Ana I. Ribeiro-Barros
- Laboratório de Interações Planta-Ambiente e Biodiversidade (PlantStress & Biodiversity), Centro de Estudos Florestais (CEF), Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Oeiras, Lisboa, Portugal
- Laboratório Associado TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Lisboa, Portugal
- Unidade de GeoBiociências, GeoEngenharias e GeoTecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Caparica, Portugal
| | - José C. Ramalho
- Laboratório de Interações Planta-Ambiente e Biodiversidade (PlantStress & Biodiversity), Centro de Estudos Florestais (CEF), Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Oeiras, Lisboa, Portugal
- Laboratório Associado TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, (ISA/ULisboa), Lisboa, Portugal
- Unidade de GeoBiociências, GeoEngenharias e GeoTecnologias (GeoBioTec), Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), Caparica, Portugal
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Dhepe A, Joshi K. Role of the antioxidant system in the regulation of the chlorophyll biosynthesis pathway in the vascular plant Cucumis sativus. FUNCTIONAL PLANT BIOLOGY : FPB 2018; 45:464-473. [PMID: 32290985 DOI: 10.1071/fp16393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Accepted: 10/09/2017] [Indexed: 06/11/2023]
Abstract
In this study, the role of the antioxidant system has been examined in the regulation of the chlorophyll biosynthesis pathway in the vascular plant Cucumis sativus L. To generate reactive oxygen species (ROS), etiolated (E) and green (G) cucumber cotyledons were treated with methyl viologen (MV) or were exposed to high light (HL, 400-500µEm-2s-1). ROS generation was confirmed by measuring proline and H2O2 concentrations. With the effects of the MV- and HL-induced oxidative stress, it was observed that the chlorophyll biosynthesis pathway was severely affected in the HL-treated etiolated cotyledons (E-HL), MV-treated etiolated cotyledons (E-MV) and in MV-treated green cotyledons (G-MV) at 5-amino levulinic acid (ALA) as well as at protoporphyrin IX and Mg-protoporphyrin IX monomethyl ester levels. The antioxidant assays conducted showed that the ascorbate peroxidase (APX) activity had decreased in the E-HL, E-MV and G-MV cotyledons along with the levels of ascorbate and lutein. A decrease in the NADPH-dependent thioredoxin reductase (NTRC) was also observed in the MV-treated cotyledons with a significant impairment of the catalase activity in the E-HL cotyledons. Conversely, in the HL-treated green i.e. G-HL cotyledons, where the accumulation of H2O2 and the inhibition of chlorophyll biosynthesis were not observed, an increase in the levels of APX, NTRC, peroxiredoxin, ascorbate, glutathione and lutein was noted. Thus, the results obtained suggested that the antioxidant system could influence the flow of the chlorophyll biosynthesis pathway through maintaining the levels of H2O2.
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Affiliation(s)
- Aarti Dhepe
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India - 411007
| | - Komal Joshi
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India - 411007
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Fini A, Guidi L, Ferrini F, Brunetti C, Di Ferdinando M, Biricolti S, Pollastri S, Calamai L, Tattini M. Drought stress has contrasting effects on antioxidant enzymes activity and phenylpropanoid biosynthesis in Fraxinus ornus leaves: an excess light stress affair? JOURNAL OF PLANT PHYSIOLOGY 2012; 169:929-39. [PMID: 22537713 DOI: 10.1016/j.jplph.2012.02.014] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 02/02/2012] [Accepted: 02/07/2012] [Indexed: 05/18/2023]
Abstract
The experiment was conducted using Fraxinus ornus plants grown outside under full sunlight irradiance, and supplied with 100% (well-watered, WW), 40% (mild drought, MD), or 20% (severe drought, SD) of the daily evapotranspiration demand, with the main objective of exploring the effect of excess light stress on the activity of antioxidant enzymes and phenylpropanoid biosynthesis. Net CO₂ assimilation rate at saturating light and daily assimilated CO₂ were significantly smaller in SD than in WW and MD plants. Xanthophyll-cycle pigments supported nonphotochemical quenching to a significantly greater extent in SD than in MD and WW leaves. As a consequence, the actual efficiency of PSII (Φ(PSII)) was smaller, while the excess excitation-energy in the photosynthetic apparatus was greater in SD than in WW or MD plants. The concentrations of violaxanthin-cycle pigments relative to total chlorophyll (Chl(tot)) exceeded 200 mmol mol⁻¹ Chl(tot) in SD leaves at the end of the experiment. This leads to hypothesize for zeaxanthin a role not only as nonphotochemical quencher, but also as chloroplast antioxidant. Reductions in ascorbate peroxidase and catalase activities, as drought-stress progressed, were paralleled by greater accumulations of esculetin and quercetin 3-O-glycosides, both phenylpropanoids having effective capacity to scavenge H₂O₂. The drought-induced accumulation of esculetin and quercetin 3-O-glycosides in the vacuoles of mesophyll cells is consistent with their putative functions as reducing agents for H₂O₂ in excess light-stressed leaves. Nonetheless, the concentration of H₂O₂ and the lipid peroxidation were significantly greater in SD than in MD and WW leaves. It is speculated that vacuolar phenylpropanoids may constitute a secondary antioxidant system, even on a temporal basis, activated upon the depletion of primary antioxidant defences, and aimed at keeping whole-cell H₂O₂ within a sub-lethal concentration range.
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Affiliation(s)
- Alessio Fini
- Dipartimento di Scienze delle Produzioni Vegetali, del Suolo e dell'Ambiente Agroforestale, Università di Firenze, Viale delle Idee 30, I-50019 Sesto Fiorentino, Firenze, Italy
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