Photochemical Efficiency and Oxidative Metabolism of Tree Species during Acclimation to High and Low Irradiance

Junior, Adamir da Rocha Nina; Maia, Jair Max Furtunato; Martins, Samuel C. V.; Gonçalves, José Francisco de Carvalho

doi:10.3390/plants9081047

Cited by 6 publications

(6 citation statements)

References 80 publications

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“…As hypothesized, we expect that late-successional species may be photoinhibited when exposed to excessive light energy in degraded areas [ 47 , 48 ]. Late-successional D .…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, the high performance of N-fixers, especially Acacia spp., was evidenced under different water and nutrient conditions. As hypothesized, we expect that late-successional species may be photoinhibited when exposed to excessive light energy in degraded areas [47,48]. Late-successional D. odorata increased energy dissipation, indicating photoinhibition and oxidative stress [13].…”

Section: Specific Performance and Stress Responsesmentioning

confidence: 99%

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Fertilization and seasonality influence on the photochemical performance of tree legumes in forest plantation for area recovery in the Amazon

et al. 2021

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N-fixing leguminous species can reach atmospheric dinitrogen gas (N2), having an advantage under N-limited degraded environments. These N-fixers are constantly used as facilitative species. Chlorophyll a fluorescence (ChF) acknowledges how different species take up and use light energy during photosynthesis. These techniques assess stress and performance responses to photosynthesis and are used for the selection of species with potential for reforestation. Six Fabaceae species were selected for this study: three nonfixing species (Cenostigma tocantinum, Senna reticulata and Dipteryx odorata) and three N-fixing species (Clitoria fairchildiana, Inga edulis and Acacia spp.). Variations in chlorophyll fluorescence under high vs. low water and nutrient conditions were studied. Multivariate analysis was performed to detect the effects of seasonality and fertilization on dark-adapted ChF two years after the experiment was established. The correlation among ChF variables and growth, photosynthesis and foliar nutrient concentrations was evaluated. Under high water- and nutrient-availability conditions, plants exhibited an enhanced performance index on absorption basis values correlated with electron transport fluxes. Under drought and nutrient-poor conditions, most species exhibit increased energy dissipation as photoprotection. High interspecific variation was found; therefore, species-specific responses should be considered in future ChF studies. Corroborating the ability to colonize high-light environments, N-fixers showed an increased performance index correlated with electron transport and Zn and N foliar concentrations. Negative correlations were found between photosynthesis and trapped fluxes. Diameter growth was positively correlated with electron transport fluxes. Given the different responses among species, ChF is an effective technique to screen for seasonality, fertilization and species effects and should be considered for use during forest restoration. Finally, the addition of fertilization treatments may facilitate tropical forest restoration due to the importance of nutrients in physiological processes. N-fixers showed high photochemical performance and tolerance to abiotic stress in degraded areas and therefore should be included to support ecosystem biomass restoration.

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“…As hypothesized, we expect that late-successional species may be photoinhibited when exposed to excessive light energy in degraded areas [ 47 , 48 ]. Late-successional D .…”

Section: Discussionmentioning

confidence: 99%

Section: Specific Performance and Stress Responsesmentioning

confidence: 99%

Fertilization and seasonality influence on the photochemical performance of tree legumes in forest plantation for area recovery in the Amazon

et al. 2021

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“…Usually, degraded environments expose plants to excessive light energy, and early-successional species are thought to be less photoinhibited than late-successional species (33,34). Correspondingly, energy dissipation increased in the late-successional D. odorata , indicating photoinhibition and oxidative stress (35).…”

Section: Discussionmentioning

confidence: 99%

“…With high water and nutrient availability, plant energy is mainly directed to photochemistry (32) and electron transport in plants increases, thus improving plant performance (Fig 6). Usually, degraded environments expose plants to excessive light energy, and earlysuccessional species are thought to be less photoinhibited than late-successional species (33,34). Correspondingly, energy dissipation increased in the late-successional D. odorata, indicating photoinhibition and oxidative stress (35).…”

Section: Ecofunctional Aspects Of Seasonal and Nutrient Effects On Chfmentioning

confidence: 99%

Effects of seasonality, fertilization and species on the chlorophyllafluorescence as related with photosynthesis and leguminous tree growth during Amazonian forest restoration

Jaquetti

Gonçalves

Nascimento

et al. 2020

Preprint

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The ability of species to adjust their light energy uptake is determined during plant establishment and development. Changes in resource availability may impact energy fluxes and photosynthesis. General and specific variations in chlorophyll a fluorescence under high vs. low water and nutrient conditions have been studied. N2-fixing leguminous trees, which are commonly used in tropical forest restoration, seem to be very well adapted to degraded ecosystems. To understand the effects of biological nitrogen fixation on Chl a fluorescence variables, three of the six Fabaceae species selected for this study were N2-fixing species. Additionally, the correlation among Chl a fluorescence and growth, photosynthesis and nutrient levels was evaluated. A 24-month forest restoration experiment was established, and data on dark-adapted Chl a fluorescence, photosynthesis, diameter growth and foliar nutrients were collected. Multivariate analysis was performed to detect the effects of seasonality and fertilization. Under high water- and nutrient-availability conditions, plants exhibited enhanced performance index values that were correlated with electron transport fluxes. Under drought and nutrient-poor conditions, most species exhibited increased energy dissipation as a method of photoprotection. Great interspecific variation was found; therefore, species-specific responses to the test conditions should be considered in future studies. N2-fixing species showed increased performance index and maximum fluorescence values, indicating their ability to colonize high-light environments. Negative correlations were found between photosynthesis and trapped fluxes and between diameter growth and initial fluorescence. Electron transport fluxes were positively correlated with growth. Given the different responses identified among species, Chl a fluorescence is considered a cost-effective technique to screen for seasonality, nutrient and N2-fixing species effects and should be considered for use during forest restoration. Finally, including N2-fixing species and multiple fertilization treatments in related studies may greatly facilitate the restoration of biogeochemical cycles in the tropics.

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“…Pregnancy is particularly sensitive to oxidative stress, defined as increased basal oxygen consumption in both the fetus and the mother [ 1 ]. Numerous factors can trigger oxidative stress during gestation.…”

Section: Introductionmentioning

confidence: 99%

Melatonin Alleviates Oxidative Stress Induced by H2O2 in Porcine Trophectoderm Cells

Chen

Zhao

et al. 2022

Antioxidants

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Placental oxidative stress has been implicated as a main risk factor for placental dysfunction. Alleviation of oxidative stress and enhancement of antioxidant capacity of porcine trophectoderm (PTr2) cells are effective means to maintaining normal placental function. The present study was conducted to evaluate the protective effect of melatonin (MT) on H2O2-induced oxidative damage in PTr2 cells. Our data revealed that pretreatment with MT could significantly improve the decrease in cell viability induced by H2O2, and reduce intracellular reactive oxygen species (ROS) levels and the ratio of apoptotic cells. Here, we compared the transcriptomes of untreated versus melatonin-treated PTr2 cells by RNA-seq analysis and found that differentially expressed genes (DEGs) were highly enriched in the Wnt signaling, TGF-beta signaling and mTOR signaling pathways. Moreover, pretreatment with MT upregulated the antioxidant-related genes such as early growth response3 (EGR3), WAP four-disulfide core domain1 (WFDC1), heme oxygenase1 (HMOX1) and vimentin (VIM). These findings reveal that melatonin protects PTr2 cells from H2O2-induced oxidative stress damage.

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Photochemical Efficiency and Oxidative Metabolism of Tree Species during Acclimation to High and Low Irradiance

Cited by 6 publications

References 80 publications

Fertilization and seasonality influence on the photochemical performance of tree legumes in forest plantation for area recovery in the Amazon

Fertilization and seasonality influence on the photochemical performance of tree legumes in forest plantation for area recovery in the Amazon

Effects of seasonality, fertilization and species on the chlorophyllafluorescence as related with photosynthesis and leguminous tree growth during Amazonian forest restoration

Melatonin Alleviates Oxidative Stress Induced by H2O2 in Porcine Trophectoderm Cells

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