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s-Triazine Effects on Seed Germination and Hypocotyl Hook Opening

Published online by Cambridge University Press:  12 June 2017

C. G. P. Pillai  and
D. E. Davis
C. G. P. Pillai
Affiliation:
Dep. Bot. and Microbiol., Auburn Univ. Agr. Exp. Sta., Auburn, AL 36830
D. E. Davis
Affiliation:
Dep. Bot. and Microbiol., Auburn Univ. Agr. Exp. Sta., Auburn, AL 36830
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Abstract

The effects of seven s-triazines on the opening of the hypocotyl hook of cotton (Gossypium hirsutum L. ‘DPL Smooth Leaf’) and the germination of lettuce seed (Lactuca sativa L. ‘Grand Rapids’) were investigated. The s-triazines used were ametryne [2-(ethylamino)-4-(isopropylamino)-6-(methylthio)-s-triazine], atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine], cyprazine [2-chloro-4-(cyclopropylamino)-6-(isopropylamino)-s-triazine], prometone [2,4-bis (isopropylamino)-6-methoxy-s-triazine], prometryne [2,4-bis (isopropylamino)-6-(methylthio)-s-triazine], propazine [2-chloro-4,6-bis(isopropylamino)-s-triazine], and simazine [2-chloro-4,6-bis(ethylamino)-s-triazine]. All triazines except cyprazine stimulated germination of lettuce seed given 4 min of dim red light but none were stimulatory in the dark. Maximum stimulation occurred with 1 X 10-8 to 1 X 10-12 M s-triazine. All triazines except atrazine and cyprazine stimulated the opening of cotton hypocotyl hooks given 2 hr of dim red light of the s-triazines tested. Prometryne and ametryne were the most stimulatory to hook opening in the light and the most inhibitory in the dark. Their effects paralleled those of kinetin.

Type
Research Article
Information
Weed Science , Volume 21 , Issue 5 , September 1973 , pp. 461 - 464
Copyright
Copyright © 1973 Weed Science Society of America 

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References

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