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Download PDF by Carl Fedtke: Biochemistry and Physiology of Herbicide Action

By Carl Fedtke

ISBN-10: 3642683754

ISBN-13: 9783642683756

ISBN-10: 3642683770

ISBN-13: 9783642683770

Herbicides are a part of smooth agricultural construction platforms and consequently give a contribution considerably to the financial system of agricultural items. whilst, herbicides are powerful and particular inhibitors of plant metabolism and will hence be used as precious instruments in uncomplicated plant physiological examine. a widely known instance is the photosynthesis-inhibiting herbicide diuron, identified to plant physiologists as DCMU, which has turn into one of many necessities in glossy photosynthesis learn. equally, wisdom in different components of plant metabolism will be complex by way of herbicides as particular inhibitors. This booklet describes the results of herbicides at the metabolism of upper vegetation from the perspective of the plant physiologist. the cloth of this publication is consequently, so far as attainable, divided into parts of metabolism. This publication intends (1) to give the reader with present wisdom and perspectives within the sector of herbicide modes of motion and (2) to advertise the long run use of herbicides as metabolic inhibitors in plant physiological learn to the benefit of either, the pesticide and the plant sciences. I desire to exhibit my due to my colleagues and associates Prof. N. Amrhein, Prof. E. Elstner, Dr. L. Eue, Dr. J. Konze, Dr. okay. Liirssen, Dr. W.Oettmeier, Dr. H. Quader, Dr. R. R. Schmidt, Dr. R. H. Shimabukuro, Dr. J. Stetter, Prof.

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Chloroplasts isolated from either tolerant sugar beet leaves or sensitive Sinapis and Chenopodium leaves did not differ in their pI 50-values [31, 196]. However, the herbicide is rapidly detoxified by the formation of an N-glucoside in sugar Table 11. Structures, water solubilities, and pIso-values of pyrldazinone herbicides (cf. Table 4) Common name Structure Pyrazone :X;tO (CU')'NJ:;N-0 ' I Water sol. 6 m. 47 Inhibition of Photosynthetic Electron Flow beet [202,203], resulting in a rapid recovery of photosynthetic CO 2-fixation [60].

4 H °D ct NAO N H Terbacil a{N/C(co,), CH3 I NAo H 44 C. Photosynthesis Bromacil [40, 185], likefluometuron and atrazine, but at lower concentrations, retards the senescence in maize leaves [186]. This effect may be seen with all inhibitors of photosynthesis and has been interpreted to be a consequence of partial inhibition of photosynthesis. ) [187]. Photosynthesis was initially inhibited in both types of plants, but only in the resistant species was CO 2-fIXation recovered after 6 days. Uptake and transport of the inhibitor were correlated with the transpiration rate, but the detoxification rate was considerably higher in the resistant plants.

Consequently, other factors than foliar detoxification may play an important role in the tolerance of some grasses to cyanazine. Prometon [135]. Prometryne [116] is one of the most active inhibitors of photosynthesis in the s-triazine series both in vitro and in vivo [136]. Whereas the carbon-fixation pattern after feeding with 14C02 is unchanged in the dark, in the light there is an increased labelling of aspartate and organic acids but a decreased labelling of amino acids, sugars, and glycerate.

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Biochemistry and Physiology of Herbicide Action by Carl Fedtke

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