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Some Effects of Amitrol on the Respiratory Activities of Zea mays

Published online by Cambridge University Press:  12 June 2017

C. G. McWhorter  and
W. K. Porter
C. G. McWhorter
Affiliation:
Louisiana State University, Baton Rouge, Louisiana Crops Research Division, Agricultural Research Service, U.S. Department of Agriculture, Delta Branch Experiment Station, Stoneville, Mississippi
W. K. Porter
Affiliation:
Louisiana State University, Baton Rouge, Louisiana
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Extract

Amitrol (3-amino-1,2,4-triazole) has received considerable attention in recent years as a herbicide and defoliant. This material was noted to have growth-inhibiting and defoliating properties by Hall et al. in 1952. Hall et al. reported that amitrol caused chlorophyll destruction under certain conditions and that chlorophyll synthesis was impaired in tissues formed at the time of, or subsequent to, absorption of the chemical. These workers also reported that cotton treated with amitrol showed a loss approximately 50 percent of the original reducing sugars and sucrose. Herbert and Linck have reported an initial increase in the rate of respiration of Canada thistle following treatment with amitrol. This initial respiratory increase was followed by a decrease which was dependent upon time as well as the concentration of amitrol applied to the plants. Similar results were obtained by Miller and Hall using Avena sections and cotton leaf discs. Heim et al. found that amitrol caused decreases in catalase activity of certain plants. Reduction of chlorophyll content and catalase activity were obtained following application of amitrol to leaves of potato, barley, and sunflower. In experiments reported in a more recent paper by these workers, amitrol caused in vitro inhibition of catalase activity.

Type
Research Article
Information
Weeds , Volume 8 , Issue 1 , January 1960 , pp. 29 - 38
Copyright
Copyright © 1960 Weed Science Society of America 

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References

Literature Cited

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