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Published in Crop Sci 10:228-232 (1970)
© 1970 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of 2,3,5-Triiodobenzoic Acid on Flax1

R. J. Vetter, D. J. Holden and R. S. Albrechtsen2

Two varieties of flax (Linum usitatissimum L.), ‘Summit’ and ‘Nored,’ were treated with 2,3,5-triiodobenzoic acid (TIBA) in an attempt to increase lateral branching and seed yield. Rates of 100 ppm to 300 ppm TIBA successfully inhibited apical dominance and broke lateral bud dormancy; however, timing of treatment was critical for maximum bud breakage with minimum injury to the flax plant. The only significant effects on seed yield were decreases, but indications are that TIBA has the potential of increasing yield in flax when certain critical environmental factors are present.

Key Words: TIBA • Lateral bud dormancy • Apical dominance • Lateral branching

1 Contribution from the Departments of Botany-Biology and Agronomy, South Dakota State University and the South Dakota Agricultural Experiment Station, Brookings. Approved for publication by the Dean and Director as Journal Series No. 890. Part of a thesis submitted by the senior author in partial fulfillment of the requirements for the M.S. degree. This investigation was supported in part by a grant from the International Minerals and Chemical Corporation.

2 Formerly Graduate Research Assistant (now Graduate Assistant, Purdue University); Professor of Botany-Biology; and Associate Professor of Agronomy; respectively, South Dakota State University, Brookings, 57006.

Received for publication June 4, 1969.




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