Comparative toxicity of insecticides on thylakoids of intact Scenedesmus bijugatus [Turp.] Kutz. and Ankistrodesmus convolutus Corda cells: measurement of chlorophyll a fluorescence

• Autorzy: Mohapatra P K , Mohanty R.C.
• Języki publikacji: EN

Abstrakty

EN

A decrease in maximum fluorescence (Fm) and fluorescence yield (Fv/Fm) and increase in non-photochemical quenching (qN) were observed in the cultures treated with quinalphos, endosulfan, and carbaryl. The effects were time dependent but most of them were observed during the first 2 h. The insecticides also effectively increased the transthylakoid pH difference (ΔpH), this being attributed to inhibition of thylakoid ATPase. Acceleration of qN showed a direct correlation with the increase in ΔpH in all cases. A. convolutus was more sensitive to all insecticides. Carbaryl was less toxic than quinalphos and endosulfan.

PL

W kulturach stwierdzono spadek maksymalnej fluorescencji (Fm) i wydajności fluorescencji (Fv/Fm), oraz wzrost niefotochemicznego wygaszania (qN) pod wpływem quinalfosu, endosulfanu i karbarylu. Zjawiska te były zależne od czasu, ale największe nasilenie ich obserwowano przez pierwsze 2 godziny. Insektycydy istotnie zwiększały transtylakoidową różnicę pH (ΔpH), co było związane z inhibicją tylakoidowej ATPazy. We wszystkich przypadkach przyspieszenie qN wykazywało bezpośredni związek z wzrostem ΔpH. A. convolutus był bardziej wrażliwy na wszystkie insektycydy. Karbaryl był mniej toksyczny od quinalfosu i endosulfanu.

Słowa kluczowe

EN

chlorophyll a; cell; fluorescence; Ankistrodesmus convolutus; toxicity; thylakoid; Scenedesmus bijugatus; insecticide

• Wydawca: -
• Czasopismo: Acta Hydrobiologica
• Rocznik: 1996
• Tom: 38
• Numer: 3-4
• Opis fizyczny: p.109-116

Twórcy

autor

Mohapatra P K

• Rostock University, Freiligrathstrasse 7-8, 18051-Rostock, Germany

autor

Mohanty R.C.

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