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Physiological and Cytological Effects of BAS 9052 OH on Corn (Zea mays) Seedlings

Published online by Cambridge University Press:  12 June 2017

Nana K. Asare-Boamah  and
Ronald A. Fletcher
Nana K. Asare-Boamah
Affiliation:
Dep. Environ. Biol., Univ. of Guelph, Guelph, Ontario, Canada N1G 2W1
Ronald A. Fletcher
Affiliation:
Dep. Environ. Biol., Univ. of Guelph, Guelph, Ontario, Canada N1G 2W1
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Abstract

Four days after treatment of corn (Zea mays L. 'SX111′) seedlings with BAS 9052 OH {2 - [1-(ethoxyimino) butyl] - 5 - [2 - (ethylthio) - propyl] - 3 - hydroxy - 2 - cyclohexene-1 - one} growth was inhibited and a purple color developed in the leaves. Low dosages (0.02 and 0.04 kg/ha) caused bleaching of the newly expanding leaves. Dosages higher than 0.04 kg/ha caused significant reductions in length and fresh and dry weights of both shoots and roots. Anthocyanin and total - sugar content increased, whereas chlorophyll accumulation and respiratory activity were reduced by herbicide treatment. BAS 9052 OH did not alter the mitotic index of corn root tips, but induced binucleate cells by preventing cell-plate and -wall formation. In some cells, the daughter nuclei were reoriented with respect to the longitudinal axis of the cells, and in others, the nuclei failed to migrate to the poles. These physiological and cytological effects of BAS 9052 OH on corn seedlings may be responsible for the phytotoxic action of the herbicide on grasses.

Keywords

Anthocyaninchlorophyllsugarsrespirationmitosis
Type
Research Article
Information
Weed Science , Volume 31 , Issue 1 , January 1983 , pp. 49 - 55
Copyright
Copyright © 1983 Weed Science Society of America 

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