Crop Science Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Crop Sci 34:67-71 (1994)
© 1994 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Foster, J. D.
Right arrow Articles by Murray, D. S.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Foster, J. D., Jr.
Right arrow Articles by Murray, D. S.
Agricola
Right arrow Articles by Foster, J. D.
Right arrow Articles by Murray, D. S.

Prometryn Tolerance in Glanded versus Glandless Isolines of Cotton

J. David Foster, Jr.

Merck, Sharp & Dohme, 12700 W. 117th St., Overland Park, KS 66210

Laval M. Verhalen* and Don S. Murray

Dep. of Agronomy, Oklahoma State Univ., Stillwater, OK 74078

* Corresponding author.

Cotton (Gossypium hirsutum L.) cultivars normally have lysigenous glands conditioned by two dominant, independently inherited alleles, Gl2 and Gl3. Glandless (gl2gl2gl3gl3) isogenic lines are now available for a number of those cultivars. Such lines allow a decisive test for the relationship formerly proposed between accumulation of the herbicide prometryn [N,N'-bis(1-methylethyl)-6-(methylthio)-l,3,5-triazine-2,4-diamine] in the lysigenous glands and increased crop tolerance to that pesticide. Experiments were conducted in a growth chamber to compare the prometryn tolerance of glanded vs. glandless ‘Empire 61 (WR)’ and ‘Westburn M’ isolines. Two intermediately glanded Empire isolines (Gl2Gl2gl3gl3 and gl2gl2Gl3Gl3) were also available for analysis. Ratios derived from leaf chlorophyll fluorescence measurement curves established that the photosynthetic inhibition caused by prometryn in glanded cotton seedlings was of less intensity and shorter duration than in glandless plants within the same genetic background. Comparisons involving the intermediately glanded Empire isolines sugo gested that Gl2 enhances seedling tolerance more than does Gl3. Glanded vs. glandless isolines in five genetic backgrounds (i.e., Empire 61 (WR), Westburn M, ‘Delcot 277’, ‘TH 149’, and ‘Stoneville 213’) plus the two intermediate Empire isolines were also evaluated for prometryn tolerance in the field. Visual crop injury ratings and measured lint yields support the growth chamber data. The treated glanded isoline on each background displayed less injury (20–56%) and higher yield (44–60%) than the corresponding glandless isoline. Again, Gl2 showed less injury than Gl3 though differences in lint yield were not significant. Clearly, lysigenous glands enhance prometryn tolerance in cotton, and higher gland density is directly associated with higher photosynthetic rates and reduced crop injury.

Thesis research submitted by the senior author in partial fulfillment of the requirements for the M.S. degree at Oklahoma State Univ. Approved for publication by the Director, Oklahoma Agric. Exp. Stn. This research was supported under Projects H-933 and H-1135.

Received for publication November 9, 1992.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1994 by the Crop Science Society of America.