Thioredoxin-mediated reduction of the photosystem I subunit PsaF and activation through oxidation by the interaction partner plastocyanin

Farkas, Daniel L.; Hansson, Örjan

doi:10.1016/j.febslet.2011.04.073

Cited by 4 publications

(3 citation statements)

References 19 publications

(33 reference statements)

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“…2013). Plastocyanin functions as an electron transfer agent between cytochrome f and P700 + from PSI (Farkas and Hansson 2011). It differed from the previous proteomic analysis of tomato and P. tenuiflora, which had not found any differentially expressed protein associated with PSI under alkali stress (Yu et al 2013;Gong et al 2014c).…”

Section: Photosynthesiscontrasting

confidence: 71%

Global proteomic mapping of alkali stress regulated molecular networks in Helianthus tuberosus L.

et al. 2016

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Background and aims Soil salinization with high pH condition is a major abiotic stress to plant growth and crop productivity. Helianthus tuberosus L. is an important stress tolerant plant and can survive in the salinealkali soil and semiarid areas. The aim of this study is to identify the effect of alkali stress on H. tuberosus through global proteomics analysis and improve understanding of the alkalinity resistance of plants. Methods H. tuberosus seedlings were exposed to different level alkali stress for 7 days. Protein profiling was quantified by conducting MS-based comparative proteomics analysis. RT-PCR study was carried out to analyze the mRNA expression levels of candidate alkali stress response proteins. Results The response of H. tuberosus to alkali stress was detected at both physiological and molecular levels. 104 differentially expressed proteins from H. tuberosus leaves response to Na 2 CO 3 treatment were successfully identified.Functional categorization of these identified proteins showed that the accumulation level of proteins involved in glycolysis, TCA cycle, PSI system, ROS scavenging and signal transduction increased under alkali stress. Conclusions Based on the observation of plant growth and the investigation of molecular regulation, H.tuberosus could resist certain alkali stress by modulating carbohydrate metabolism and redox homeostasis. These findings provide a new sight into the underlying molecular mechanisms of alkali resistance in plant.

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Section: Photosynthesiscontrasting

confidence: 71%

Global proteomic mapping of alkali stress regulated molecular networks in Helianthus tuberosus L.

et al. 2016

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“…PSI is known to be the most efficient light converter in nature since pigments in the PSI are not being quenched and energy transfer to the electron donor is very rapid [ 38 ]. Plastocyanin functions as an electron transfer agent between cytochrome f and P700 + from PSI [ 39 ]. We speculated that the increased CAB could transfer more excitation energy to the reaction center, and the accumulation of plastocyanin can donate more electrons to PSI.…”

Section: Discussionmentioning

confidence: 99%

Water deficit mechanisms in perennial shrubs Cerasus humilis leaves revealed by physiological and proteomic analyses

et al. 2016

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BackgroundDrought (Water deficit, WD) poses a serious threat to extensively economic losses of trees throughout the world. Chinese dwarf cherry (Cerasus humilis) is a good perennial plant for studying the physiological and sophisticated molecular network under WD. The aim of this study is to identify the effect of WD on C. humilis through physiological and global proteomics analysis and improve understanding of the WD resistance of plants.MethodsCurrently, physiological parameters were applied to investigate C. humilis response to WD. Moreover, we used two-dimensional gel electrophoresis (2DE) to identify differentially expressed proteins in C. humilis leaves subjected to WD (24 d). Furthermore, we also examined the correlation between protein and transcript levels.ResultsSeveral physiological parameters, including relative water content and Pn were reduced by WD. In addition, the malondialdehyde (MDA), relative electrolyte leakage (REL), total soluble sugar, and proline were increased in WD-treated C. humilis. Comparative proteomic analysis revealed 46 protein spots (representing 43 unique proteins) differentially expressed in C. humilis leaves under WD. These proteins were mainly involved in photosynthesis, ROS scavenging, carbohydrate metabolism, transcription, protein synthesis, protein processing, and nitrogen and amino acid metabolisms, respectively.ConclusionsWD promoted the CO2 assimilation by increase light reaction and Calvin cycle, leading to the reprogramming of carbon metabolism. Moreover, the accumulation of osmolytes (i.e., proline and total soluble sugar) and enhancement of ascorbate-glutathione cycle and glutathione peroxidase/glutathione s-transferase pathway in leaves could minimize oxidative damage of membrane and other molecules under WD. Importantly, the regulation role of carbohydrate metabolisms (e. g. glycolysis, pentose phosphate pathways, and TCA) was enhanced. These findings provide key candidate proteins for genetic improvement of perennial plants metabolism under WD.Electronic supplementary materialThe online version of this article (doi:10.1186/s12953-017-0117-1) contains supplementary material, which is available to authorized users.

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“…Drought stress reduces the photosynthetic rate of plants, changes the distribution and metabolism of plant carbon, and causes decreased energy consumption and yield [36]. Here, downregulated expression of photosynthesis-related genes in drought-stressed leaves may have been associated with decreased photosynthetic capacity under drought stress [37]. The high number of downregulated genes associated with photosynthesis may also indicate that oxidative stress was higher in DSL than in DTL.…”

Section: Genes Involved In Photosynthesis and Carbon Metabolismmentioning

confidence: 95%

Comparative analysis of alfalfa (Medicago sativa L.) seedling transcriptomes reveals genotype-specific drought tolerance mechanisms

Wang

et al. 2021

Plant Physiology and Biochemistry

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BackgroundDrought is one of the main abiotic factors that affect alfalfa yield. The identi cation of genes that control this complex trait can provide important insights for alfalfa breeding. However, little is known about how alfalfa responds and adapts to drought stress, particularly in cultivars of differing drought tolerance. ResultsIn this study, the drought-tolerant cultivar Dryland 'DT' and the drought-sensitive cultivar WL343HQ 'DS' were used to characterize leaf and root physiological responses and transcriptional changes in response to water de cit. Under drought stress, Dryland roots (DTR) showed more differentially expressed genes than WL343HQ roots (DSR), whereas WL343HQ leaves (DSL) showed more differentially expressed genes than Dryland leaves (DTL). Many of these genes were involved in stress-related pathways, carbohydrate metabolism, and lignin and wax biosynthesis, which may have improved the drought tolerance of alfalfa. We also observed that several genes related to ABA metabolism, root elongation, peroxidase activity, cell membrane stability, ubiquitination, and genetic processing responded to drought stress in alfalfa. We highlighted several candidate genes, including sucrose synthase, xylan 1,4-betaxylosidase, primary-amine oxidase, and alcohol-forming fatty acyl-CoA reductase, for future studies on drought stress resistance in alfalfa and other plant species. ConclusionsIn summary, our results reveal the unique drought adaptation and resistance characteristics of two alfalfa genotypes. These ndings, which may be valuable for drought resistance breeding, warrant further gene functional analysis to augment currently available information and to clarify the drought stress regulatory mechanisms of alfalfa and other plants. HighlightsWe assembled leaf and root transcriptomes of drought-tolerant and drought-sensitive alfalfa cultivars under control and drought conditions.Under drought, the drought-tolerant cultivar exhibited more differentially expressed metabolites than the drought-sensitive cultivar.Genes associated with carbon metabolism, amino acid metabolism, hormones, and secondary metabolites were differentially expressed under drought stress.The drought-tolerant cultivar exhibited higher expression of genes encoding sucrose synthase, xylan 1,4-beta-xylosidase, primary-amine oxidase, and alcohol-forming fatty acyl-CoA.

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Thioredoxin-mediated reduction of the photosystem I subunit PsaF and activation through oxidation by the interaction partner plastocyanin

Cited by 4 publications

References 19 publications

Global proteomic mapping of alkali stress regulated molecular networks in Helianthus tuberosus L.

Global proteomic mapping of alkali stress regulated molecular networks in Helianthus tuberosus L.

Water deficit mechanisms in perennial shrubs Cerasus humilis leaves revealed by physiological and proteomic analyses

Comparative analysis of alfalfa (Medicago sativa L.) seedling transcriptomes reveals genotype-specific drought tolerance mechanisms

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