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Stomata Variations in Canada Thistle and Response to Herbicides

Published online by Cambridge University Press:  12 June 2017

J. M. Hodgson  and
H. D. Moore
J. M. Hodgson
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U. S. Dep. of Agr., Bozeman, Montana 59715
H. D. Moore
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U. S. Dep. of Agr., Bozeman, Montana 59715
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Abstract

Canada thistle (Cirsium arvense (L) Scop.) includes many regional races that are heritable, distinct ecotypes. When cultured at Bozeman, Montana a group of these ecotypes varied in phenological, morphological, and anatomical characteristics. These ecotypes also responded differently to (2,4-dichlorophenoxy)acetic acid (2,4-D) and 3-amino-s-triazole (amitrole). Stomatal frequency and area on leaves also differed among ecotypes studied. Although stomatal frequency and stomatal area differed among the ecotypes studied, there was no correlation with herbicide response. Apparently, stomata were not a significant portal of entry of 2,4-D into the upper surface of Canada thistle leaves.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 1 , January 1972 , pp. 68 - 70
Copyright
Copyright © Weed Science Society of America 

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References

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