STRUCTURE AND SITE OF ACTION OF AN ALGICIDE FROM A CYANOBACTERIUM, OSCILLATORIA LATE-VIRENS

被引：20

作者：

BAGCHI, SN

机构：

[1] Department of Biological Sciences, R. D. University, Jabalpur, Madhya Pradesh

来源：

JOURNAL OF PLANT PHYSIOLOGY | 1995年 / 146卷 / 03期

关键词：

CYANOBACTERIUM; OSCILLATORIA LATE-VIRENS; ALGICIDAL/HERBICIDAL METABOLITE; PHOTOSYSTEM II ACCEPTOR SITE;

D O I：

10.1016/S0176-1617(11)82072-9

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

An algicidal (herbicidal) metabolite from cyanobacterium Oscillatoria late-virens was purified and the mechanism of action determined. The algicide had a molecular weight of 444 Da, an emperical formula of C29H48O3, and contained phenol, C-20 alkane and an alpha, beta-unsaturated carbonyl residue. With K3Fe(CN)(6) and benzoquinones, 50 % inhibition of photosynthetic electron flow (I-50) was attained by 1.25-2.35 mu M of algicide. Chlorophyll fluorescence data indicate that the algicide interacted at the acceptor site of photosystem (PS)II, although the mechanism may be different from that of another herbicide, 3-(3,4-dichlorophenyl)-1, 1-dimethyl urea (DCMU). Structural resemblance with phenolic herbicides indicates their common mode of interaction.

引用

页码：372 / 374

页数：3

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