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Titolo:
Oxygen uptake, acidification of medium and nitrate uptake induced by blue light in nitrate-starved Chlorella cells
Autore:
Kamiya, A;
Indirizzi:
Teikyo Univ, Fac Pharmaceut Sci, Chem Lab, Sagamiko, Kanagawa 1990195, Japan Teikyo Univ Sagamiko Kanagawa Japan 1990195 miko, Kanagawa 1990195, Japan
Titolo Testata:
PLANT AND CELL PHYSIOLOGY
fascicolo: 4, volume: 41, anno: 2000,
pagine: 534 - 540
SICI:
0032-0781(200004)41:4<534:OUAOMA>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTEIN KINASE-C; SIGNAL-TRANSDUCTION; COLORLESS MUTANT; OKADAIC-ACID; CALYCULIN-A; AMMONIA; REDUCTASE; INHIBITOR; STARCH; STAUROSPORINE;
Keywords:
blue light; Chlorella; glycine; K252a; oxygen uptake; protein phosphatase; staurosporine;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Kamiya, A Teikyo Univ, Fac Pharmaceut Sci, Chem Lab, Sagamiko, Kanagawa 1990195, Japan Teikyo Univ Sagamiko Kanagawa Japan 1990195 gawa 1990195, Japan
Citazione:
A. Kamiya, "Oxygen uptake, acidification of medium and nitrate uptake induced by blue light in nitrate-starved Chlorella cells", PLANT CEL P, 41(4), 2000, pp. 534-540

Abstract

Blue light-induced oxygen uptake of the colorless mutant of Chlorella kessleri (No, 9.80) was 30-40% higher in the presence of exogenous glycine thanin its absence. None of the other amino acids tested had this effect. Moreover, mutant cells in which glutamine synthetase was inhibited by methionine sulphoximine, accumulated approximately 65% more ammonium ions under blueirradiation in the presence of exogenous glycine than in its absence. The protein kinase C inhibitors, staurosporine or K252a, reduced the enhancement of oxygen uptake by approximately 40%. The present results indicate that blue light-dependent deamination of endogenous glycine might be a prerequisite for enhanced oxygen uptake in Chlorella. This blue light-induced oxygenuptake was not influenced by the inhibitors of protein phosphatase, calyculin A or okadaic acid. On the contrary, calyculin A and okadaic acid had a marked effect on the acidification of the suspension medium and nitrate uptake induced by blue light in Chlorella cells. The different responses to the inhibitors of protein kinase and phosphatase suggest the presence of different pathways among the blue light signal transduction operating on oxygenuptake, acidification of the medium and nitrate uptake in Chlorella.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 01:19:24