Regulation of the nitrite transport system in Chlorella fusca Shih. et Krauss

• Autorzy: Abdel-Basset R , Ali A.H.
• Języki publikacji: EN

Abstrakty

EN

Uptake of nitrite by C. fusca cells was considerable only in the light. Pre-starvation in the dark or permanent darkness was accompanied by very low rates of nitrite uptake. 2,4 dinitrophenol, an energy metabolism inhibitor, also inhibited nitrite uptake. Nevertheless, it is difficult to assume that nitrite uptake is an active process. Metabolic inhibitors having various targets in plant cell metabolism such as arsenate, cyanide, cyclohexamide and 6.methylpurine also inhibited nitrite uptake. A feedback inhibition of nitrite uptake was observed in the presence of glutamate or glutamine. The addition of NO3- or NH4+ competitively inhibited NO2- uptake. Therefore, NO2- uptake in C. fusca is conditioned by several factors.

PL

Zauważalne pobieranie azotynów przez komórki C. fusca ma miejsce tylko w świetle. Po wstępnej inkubacji w ciemności lub w warunkach nieprzerwanej ciemności stwierdzono niskie tempo pobierania azotynów. Pobieranie azotynów jest również hamowane przez 2,4 dinitrofenol. Pomimo to trudno jest uznać pobór azotynów za proces aktywny. Inhibitory metaboliczne działające na różne procesy metaboliczne komórek roślinnych, jak arseniany, cyjanki, cykloheksamid, 6.metylopuryna również hamują pobieranie azotynów. Sprzężenie zwrotne hamujące pobieranie azotynów stwierdzono w obecności glutaminianu lub glutaminy. Dodatek NO3- lub NH4+ hamuje konkurencyjnie pobór NO2- .Wskazuje to, że pobieranie NO2- przez C. fusca jest uzależnione od kilku czynników.

Słowa kluczowe

EN

nitrite transport; nitrite uptake; regulation; Chlorella fusca; hydrobiology; inhibitor

• Wydawca: -
• Czasopismo: Acta Hydrobiologica
• Rocznik: 1995
• Tom: 37
• Numer: 4
• Opis fizyczny: p.183-189,fig.

Twórcy

autor

Abdel-Basset R

• University of Assiut, Assiut, Egypt

autor

Ali A.H.

Bibliografia

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