Effects of UV-B radiation on photosynthesis activity of Wolffia arrhiza as probed by chlorophyll fluorescence transients

Wang, Gaohong; Hao, Zhixin; Anken, Ralf; Lu, Jingying; Liu, Yongding

doi:10.1016/j.asr.2009.12.004

Cited by 41 publications

(25 citation statements)

References 34 publications

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“…The OJIP test is highly useful and it is being potentially applied in multidisciplinary fields for detection of various stress effects such as heavy metals, UV-B effects etc. (Sayed 2003, Cuchiara et al 2013, Wang et al 2008. ChlF parameters derived from OJIP curve was reported to be useful for measuring freezing tolerance in wheat cultivars as it senses the early metabolic changes in PS II that are initiated following exposure to low and freezing temperatures (Rapacz 2007.…”

Section: Introductionmentioning

confidence: 99%

Features of chlorophyll fluorescence transients can be used to investigate low temperature induced effects on photosystem II of algal lichens from polar regions ( Short Communication )

Mishra¹,

Hájek²,

Tuháčková³

et al. 2015

Czech Polar Rep.

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Chlorophyll fluorescence is an effective tool for investigating characteristics of any photosynthesizing organisms and its responses due to different stressors. Here, we have studied a short-term temperature response on three Antarctic green algal lichen species: Umbilicaria antarctica, Xanthoria elegans, and Rhizoplaca melanophtalma. We measured slow chlorophyll fluorescence transients in these Antarctic lichen species during slowely cooling of thallus temperature from 20°C to 5, 0 and-5°C with 20 minute acclimation at each temperature. The measurements were supplemented with saturation pulses for the analysis of chlorophyll fluorescence parameters: maximum yield of PS II photochemistry (F V /F M), effective quantum yield of PS II photochemistry ( PSII) and quenching parameters. In response to decreasing thallus temperature, we observed species-specific changes in chlorophyll fluorescence parameters as well as in the shape of the chlorophyll fluorescence transients. We propose that species-specific changes in the slow phase of chlorophyll fluorescence transients can be potentially used as indicators of freezing stress in photosynthetic apparatus of lichen algal photobionts.

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Section: Introductionmentioning

confidence: 99%

Features of chlorophyll fluorescence transients can be used to investigate low temperature induced effects on photosystem II of algal lichens from polar regions ( Short Communication )

Mishra¹,

Hájek²,

Tuháčková³

et al. 2015

Czech Polar Rep.

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“…In an excessive salinity condition, the toxic ionic stress and salt osmotic cause the reduction of photosynthetic rate, which in turn will cause a decrease in chlorophyll contents (Moradi and Ismail, 2007). Wang et al(2010Wang et al( , 2011suggested that salinity stress may inhibit electron transport at the PSII donor site. In general, the high concentration of NaCl (0.3 M) caused a remarkable reduction in protein content and the productivity of all studied strains.…”

Section: Discussionmentioning

confidence: 99%

Optimization of biomass and some metabolites productivity of Merismopedia tenuissima and Spirulina (Arthrospira) platensis grown under stress conditions

2020

ZJPAS

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The attention to using cyanobacteria as a nutrient supplement has increased due to their nutritional value and high bioactive metabolites contents. The reason behind designing such a study is to illustrate and clarify stress conditions effects like nitrogen and phosphorus supplementation and deficiency, salinity stress, and different pH values on the biomass, lipid, protein, amino acid, and carbohydrate productivities of Merismopedia tenuissima and Spirulina (Arthrospira) platensis. The obtained results revealed that an increase in sodium nitrate by 100% caused an improvement in biomass, protein, and amino acid's productivity of S. platensis and M. tenuissima by 7.02 % and 7.05, 9.2% and 47.5%, 11.8% and19.5, respectively while 100% nitrogen deficiency enhanced lipid productivity of S. platensis and M. tenuissima to 41% and 94%. Moreover, phosphorus limitation led to a reduction in biomass, protein, amino acid, and carbohydrate S. platensis to 24.3%, 21.1%, 43.3%, and 28.1%, respectively. However, phosphorus-free medium showed an increase in lipid productivity of S. platensis and M. tenuissima by 46.8% and 81.8%, respectively. The addition of 0.05 M NaCl concentration to S. platensis medium stimulates the biomass, protein, and carbohydrate productivity by 6%, 7.75%, and 18.1%, respectively, whilst, among all concentration, zero M NaCl (control) resulted in increasing biomass, protein, and amino acids, whilst, high concentration (0.3M) of NaCl enhanced lipid productivity to 125.9% and 153.5% at S. platensis and M. tenuissima, respectively. Applications of high alkalinity (pH 9) increased the productivities of all studied metabolites in S. platensis and reduction of all mention metabolites in M. tenuissima.

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“…UV-B pretreatment decreases rotifers, nematodes and mites population size and increases generation time in soils polluted with heavy metals due to reproductive defects; nevertheless, it protects Caenorhabditis elegans from disturbed locomotion [ 16 , 17 ]. Experiments showed that a large increase in nematode density in Antarctic soils (especially microbivorous genus Plectus ) resulted from blocking UV with a UV-absorbing perspex cloth [ 18 ].…”

Section: Effect Of Elevated Uv Radiation On Soilsmentioning

confidence: 99%

Effect of Elevated CO₂, O₃, and UV Radiation on Soils

Formánek

Rejšek

Vranová

2014

The Scientific World Journal

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In this work, we have attempted to review the current knowledge on the impact of elevated CO2, O3, and UV on soils. Elevated CO2 increases labile and stabile soil C pool as well as efficiency of organic pollutants rhizoremediation and phytoextraction of heavy metals. Conversely, both elevated O3 and UV radiation decrease inputs of assimilates to the rhizosphere being accompanied by inhibitory effects on decomposition processes, rhizoremediation, and heavy metals phytoextraction efficiency. Contrary to elevated CO2, O3, or UV-B decreases soil microbial biomass, metabolisable C, and soil Nt content leading to higher C/N of soil organic matter. Elevated UV-B radiation shifts soil microbial community and decreases populations of soil meso- and macrofauna via direct effect rather than by induced changes of litter quality and root exudation as in case of elevated CO2 or O3. CO2 enrichment or increased UV-B is hypothesised to stimulate or inhibit both plant and microbial competitiveness for soluble soil N, respectively, whereas O3 favours only microbial competitive efficiency. Understanding the consequences of elevated CO2, O3, and UV radiation for soils, especially those related to fertility, phytotoxins inputs, elements cycling, plant-microbe interactions, and decontamination of polluted sites, presents a knowledge gap for future research.

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Effects of UV-B radiation on photosynthesis activity of Wolffia arrhiza as probed by chlorophyll fluorescence transients

Cited by 41 publications

References 34 publications

Features of chlorophyll fluorescence transients can be used to investigate low temperature induced effects on photosystem II of algal lichens from polar regions ( Short Communication )

Features of chlorophyll fluorescence transients can be used to investigate low temperature induced effects on photosystem II of algal lichens from polar regions ( Short Communication )

Optimization of biomass and some metabolites productivity of Merismopedia tenuissima and Spirulina (Arthrospira) platensis grown under stress conditions

Effect of Elevated CO₂, O₃, and UV Radiation on Soils

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Effects of UV-B radiation on photosynthesis activity of Wolffia arrhiza as probed by chlorophyll fluorescence transients

Cited by 41 publications

References 34 publications

Features of chlorophyll fluorescence transients can be used to investigate low temperature induced effects on photosystem II of algal lichens from polar regions ( Short Communication )

Features of chlorophyll fluorescence transients can be used to investigate low temperature induced effects on photosystem II of algal lichens from polar regions ( Short Communication )

Optimization of biomass and some metabolites productivity of Merismopedia tenuissima and Spirulina (Arthrospira) platensis grown under stress conditions

Effect of Elevated CO2, O3, and UV Radiation on Soils

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Effect of Elevated CO₂, O₃, and UV Radiation on Soils