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Inhibition of photosystem II of nitrogen‐fixing blue‐green alga Nostoc linckia by the rice‐field herbicide benthiocarb
Author(s) -
Singh R. K.,
Singh B. D.,
Singh H. N.
Publication year - 1983
Publication title -
zeitschrift für allgemeine mikrobiologie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0044-2208
DOI - 10.1002/jobm.19830230708
Subject(s) - reversion , photosystem ii , heterocyst , photosynthesis , cyanobacteria , nostoc , paddy field , biology , nitrogen , chemistry , nitrogen fixation , botany , biochemistry , nitrogenase , agronomy , bacteria , organic chemistry , genetics , gene , phenotype
Effects of rice‐field herbicide benthiocarb (S‐(4‐chlorobenzyl)‐N,N‐diethyl thiolcarbamate) was studied on the nitrogen‐fixing blue‐green alga Nostoc linckia. The herbicide caused inhibition of growth and heterocyst formation, an increase in intensity of photoacoustic signals, and a four‐fold reduction in oxygen evolution, but did not affect dark O 2 ‐uptake. The inhibition of growth and heterocyst formation was relieved by 500 μg/ml glucose. A Het − Nif − mutant of Nostoc muscorum failed to show an increase in reversion frequency after treatment with 10 μg/ml benthiocarb for 1 hr.