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2013 | 20 | 3 | 489-498
Tytuł artykułu

Action of Some Organomercury Compounds on Photosynthesis in Spinach Chloroplasts

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The effects of five organomercury compounds (methylmercuric chloride, phenylmercuric acetate, phenylmercuric borate, phenylmercuric citrate and diphenylmercury) on photosynthetic electron transport (PET) in spinach chloroplasts were investigated. The IC50 values of organomercury compounds related to PET inhibition in spinach chloroplasts varied in the range from 468 mmol dm-3 to 942 mmol dm-3 and were approximately by one order higher than the corresponding value determined for HgCl2 applied also in DMSO solution (IC50 = 58 mmol dm-3). Due to extremely low aqueous solubility of diphenylmercury, the corresponding IC50 value could not be determined. Using EPR spectroscopy as probable sites of action of organomercury compounds in photosynthetic apparatus ferredoxin on the acceptor side of PS 1 and the quinone electron acceptors QA or QB on the reducing side of PS 2 were suggested.
PL
Zbadano wpływ pięciu związków rtęcioorganicznych (chlorku metylortęci, octanu fenylortęci, boranu fenylortęci, cytrynianu fenylortęci i difenylortęci) na fotosyntetyczny transport elektronów (PET) w chloroplastach szpinaku. Wartości IC50 dla związków rtęcioorganicznych związanych z inhibicją PET w chloroplastach szpinaku zmieniała się w zakresie od 468 do 942 μmol dm-3 i była w przybliżeniu o rząd większa od odpowiedniej wartości określonej dla HgCl2, stosowanego również w roztworze DMSO (IC50 = 58 μmol dm-3). Ze względu na bardzo małą rozpuszczalność difenylortęci w wodzie odpowiednia wartość IC50 nie może być określona. Wyniki badań za pomocą spektroskopii EPR pozwoliły na zaproponowanie prawdopodobnych miejsc działania związków rtęci w procesie fotosyntezy ferredoksyny po stronie akceptora PS 1 i chinonowego akceptora elektronów QA lub QB po stronie redukującej PS 2.
Wydawca
Rocznik
Tom
20
Numer
3
Strony
489-498
Opis fizyczny
Daty
wydano
2013-09-01
online
2013-10-08
Twórcy
  • Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina CH2, SK-84215 Bratislava, Slovak Republic. , sersen@fns.uniba.sk
  • Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina CH2, SK-84215 Bratislava, Slovak Republic.
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_eces-2013-0036
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