Comparison of the decay of slow delayed luminescence in triazine‐susceptible and ‐resistant biotypes of Erigeron canadensis L

FEBS Letters

Demeter, Sándor¹  Hideg, Éva¹ 

[1] Institute of Plant Physiology, Biological Research Center, Hungarian Academy of Sciences, PO Box 521, Szeged H-6701, Hungary

关键词: Delayed luminescence Triazine resistance Herbicide Photosystem II Secondary quinone acceptor Photosynthesis;    atrazine;    2-chloro-4-ethylamino-6-isopropylamino-s-triazine;    DCMU;    3-(3';    4'-dichloro-phenyl)-1;    1-dimethylurea;    dinoseb;    2;    4-dinitro-6-(2-butyl)phenol;    PS;    photosystem;    QA;    primary quinone electron acceptor of PS II;    QB;    secondary quinone electron acceptor of PS II;   

DOI  :  10.1016/0014-5793(86)80526-9

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The decay of flash-induced delayed luminescence was compared in the seconds to minutes time region in triazine-susceptible and -resistant chloroplasts. The slow luminescence component assigned to S₂Q⁻ _B and S₃Q⁻ _B recombination decayed more rapidly in resistant as compared to susceptible chloroplasts (t_1/2 ~ 8.5 and 44 s, respectively) indicating that the midpoint potential of q_b is lowered in the resistant chloroplasts. The luminescence intensity depended on the number of exciting flashes. The oscillation pattern was opposite in the two biotypes and could be computer simulated with the assumption that the Q_B/Q_B ⁻ ratio was about 1 in sensitive and 1.5 in resistant chloroplasts. Thus atrazine resistance also induces a change in the oxidation-reduction state of the Q_B pool.

【 授权许可】

Unknown