Early effect of sodium pentachlorophenate on photosynthetic activity of the alga Chlorella pyrenoidosa Chick. S-39

Плеханов, С. Е.; Chemeris, Yu. K.

doi:10.1134/s1062359008030047

Cited by 16 publications

(17 citation statements)

References 15 publications

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“…This significant decrease may be a result of the effect of this toxicant on the ETR between photosystem I and II as well as disturbance of photo reduction of NADP+ [5]. These effects were in linear pattern with PCP concentration and exposure time.…”

Section: Discussionmentioning

confidence: 67%

“…In China, dichlorophenol is extensively used in industry representing about 16% of total industrial effluents [13]. In Russian Federation, wastewaters of bleach plants contain approximately 20 various chlorinated phenolic compounds, including PCP, whose concentration reaches 1 mgL −1 [5,14].…”

Section: Introductionmentioning

confidence: 99%

“…These compounds enter the aquatic ecosystems and exert adverse effect on the aquatic life [4,5]. Due to their high toxicity, chemical stability, and bioaccumulation in living organisms, they are listed as the most toxic environmental pollutants by US EPA [6].…”

Section: Introductionmentioning

confidence: 99%

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Short-Term Bioassay of Chlorophenol Compounds Using Euglena gracilis

Ahmed

Häder²

2010

SRX Ecology

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Short-term bioassay of chlorophenol compounds such as di-and pentachlorophenol (DCP and PCP) on the movement parameters and photosynthesis activity is tested using Euglena gracilis. Cells were exposed to different concentrations of 2,4-dichlorophenol (2,4-DCP) and pentachlorophenol (PCP) for different incubation times. Results of acute toxicity tests of cell motility showed that Euglena was highly sensitive to PCP after direct exposure in comparison to 2,4-DCP (EC 50 were 26.8 mgL −1 and 205.2 mgL −1 ), respectively. In contrast, 2,4-dichlorophenol shows significant impact on the movement and photosynthesis of the Euglena after longer incubation times (24 hours). Photosynthetic yield of Euglena was suppressed at concentrations ≥1.5 and ≥12 mgL −1 of pentachlorophenol and 2,4-dichlorophenol, respectively. This proves inactivation of photosystem II through inhibition of both electron transport and potential energy of photosynthetic membrane, whereas lower concentrations disturbed Photosystem II making it work ineffectively. Rapid, sensitive, and automatic measurements of several parameters are the main advantages of the studied bioassay.

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Section: Discussionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

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Short-Term Bioassay of Chlorophenol Compounds Using Euglena gracilis

Ahmed

Häder²

2010

SRX Ecology

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“…[11] The decrease of Fv/Fm ratio in the lichen P. furfuracea is in accordance with studies on the impact of Co 2+ stress on algae. [12] Plekhanov and Chemeris [12] showed that the Fv/Fm ratio in Chlorella pyrenoidosa treated with 0.1, 1, and 10 mM Co 2+ , rapidly decreased to 0.45, 0.25, and 0.15, respectively. In the present study, 24-hour exposure to Co 2+ resulted in Fv/Fm values of 0.47 and 0.1 at 15 mM and 30 mM concentrations; suggesting that particularly at 30 mM, Co 2+ decreases the photosynthesis capacity of lichen below the non-stressed levels and induces significant photo-destructive effects on PSII, respectively.…”

Section: Discussionmentioning

confidence: 99%

Response to cobalt toxicity in lichen Pseudevernia furfuracea; uptake, photosynthetic quantum yield, membrane integrity and deoxyribonucleic acid fragmentation

Yiğittürk

Özakça

Çavuşoğlu³

et al. 2016

FNG & Bilim Tıp Dergisi

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Pseudevernia furfuracea'da kobalt toksisitesine yanıt; alım, fotosentetik kuantum verimi, membran bütünlüğü ve deoksiribonükleik asit fragmantasyonu ÖZ Amaç: Bu çalışmada fotosistem II fotosentetik kuantum verimi, membran bütünlüğü ve deoksiribonükleik asit (DNA) fragmantasyonu formasyonu üzerinde kobaltın (Co) toksik potansiyeli incelendi. Gereç ve yöntemler: Oligonükleozomal DNA fragmantasyonu terminal deoksinükleotidil transferaz dUTP çentik uç işaretleme (TUNEL) testi ile tespit edildi. Lipid peroksidasyonu malondialdehit analizi ile belirlendi. Bulgular: Bir, üç ve 24 saat boyunca farklı Co konsantrasyonlarına (NO3)2 (5, 15 ve 30 mM) maruziyetten sonra Pseudevernia furfuracea'da Fv/Fm oranı azaldı. Co 2+ -tedavisi likende Co birikimine yol açtı, hidrojen peroksit üretimi ciddi oksidatif stres başlattı, membran bütünlüğüne zarar verdi ve malondialdehit ile ölçüldüğü üzere lipid peroksidasyonu oluşturdu. On beş mM ve 30 mM Co (NO3)2 ile tedavi edilen örneklerin hücre ölümü yüzdesi 5 mM ile tedavi edilen gruptan daha yüksek idi. Sonuç: Bildiğimiz kadarıyla, bu çalışma Pseudevernia furfuracea'nın fikobiont katmanında in situ yüksek oranda DNA fragmantasyonu tespit ederken mikobiont katmanda daha düşük oranda TUNEL pozitif hücre olduğunu gösteren ilk çalışmadır. Kobalt maruziyetinin Pseudevernia furfuracea'da oksidatif stres ve DNA fragmantasyonunun eşlik ettiği bozulmuş fotosenteze yol açtığı sonucuna varıldı; tüm bu etkiler konsantrasyona bağımlı idi.Anahtar sözcükler: Kobalt; deoksiribonükleik asit fragmantasyonu; liken; oksidatif stres; Pseudevernia furfuracea; TUNEL. ABSTRACT Objectives:This study aims to examine the toxic potential of Cobalt (Co) on photosystem II photosynthetic quantum yield, membrane integrity, and deoxyribonucleic acid (DNA) fragmentation formation. Materials and methods: Oligonucleosomal DNA fragmentation was detected by terminal deoxynucleotidyl transferase-dUTP nick end labeling (TUNEL) assay. Lipid peroxidation was determined with malondialdehyde analyzing. Results: The Fv/Fm ratio decreased in Pseudevernia furfuracea following exposure to various concentrations of Co (NO3)2 (5, 15 and 30 mM) for one, three and 24 hours. Co 2+ -treatment caused the accumulation of Co in lichen, induced severe oxidative stress by the generation of hydrogen peroxide, impaired the membrane integrity, and induced lipid peroxidation as measured by malondialdehyde. Samples treated with 15 mM and 30 mM of Co (NO3)2 had higher percentage of cell death than 5 mM-treated group. Conclusion: To our knowledge, this is the first study detecting a high rate of DNA fragmentation in situ in phycobiont layer of Pseudevernia furfuracea; while it reveals that mycobiont layer has a lower rate of TUNEL-positive cells. It has been concluded that Co exposure results in impaired photosynthesis accompanied by oxidative stress and DNA fragmentation in Pseudevernia furfuracea; all these effects were concentration-dependent.

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“…중금속의 (Oh and Koh, 2013;Plekhanov and Chemeris, 2003;Travieso et al, 1999). 한편, 엽록소형광 분석법은 광합성 기구 중에서도 광 계II(Photosystem II; PSII)의 반응을 비파괴적으로, 그 리고 객관적으로 신뢰할 수 있는 측정 방법 중 하나이며, 광합성 기구에 대한 여러 가지 중요한 정보를 제공한다 (Strasser and Strasser, 1995;Serôdio et al, 1997 Küpper et al, 1996).…”

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Assessment of Heavy Metal Effects on the Freshwater Microalga, Chlorella vulgaris, by Chlorophyll Fluorescence Analysis

Oh¹,

Koh

2015

Journal of Environmental Science International

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The response of the freshwater microalga, Chlorella vulgaris, to heavy metal stress was examined based on chlorophyll fluorescence analysis to assess the toxic effects of heavy metals in freshwater ecosystems. When toxic effects were analyzed using regular chlorophyll fluorescence analysis, photosystem II activity(Fv/Fm) decreased significantly when exposed to Cu , and Cd 2+. These results suggest that Fv/Fm, as well as Φ′PSII, RFd, Fo, and NPQ could be used to assess the effects of heavy metal ions in freshwater ecosystems. However, because many types of heavy metal ions and toxic compounds co-occur under natural conditions, it is difficult to assess heavy metal toxicity in freshwater ecosystems. When Chlorella was exposed to heavy metal ions for 12 or 24h, Fv/Fm and maximal fluorescence yield(Fm) changed in response to Hg 2+ and Cu 2+ based on image analysis. However, assessing quantitatively the toxic effects of several heavy metal ions is challenging.

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Early effect of sodium pentachlorophenate on photosynthetic activity of the alga Chlorella pyrenoidosa Chick. S-39

Cited by 16 publications

References 15 publications

Short-Term Bioassay of Chlorophenol Compounds Using Euglena gracilis

Short-Term Bioassay of Chlorophenol Compounds Using Euglena gracilis

Response to cobalt toxicity in lichen Pseudevernia furfuracea; uptake, photosynthetic quantum yield, membrane integrity and deoxyribonucleic acid fragmentation

Assessment of Heavy Metal Effects on the Freshwater Microalga, Chlorella vulgaris, by Chlorophyll Fluorescence Analysis

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