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Alkaloid Response to Defoliation of Velvet Lupine (Lupinus leucophyllus)

Published online by Cambridge University Press:  12 June 2017

Michael H. Ralphs  and
Coburn Williams
Michael H. Ralphs
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Poisonous Plant Res. Lab., 1150 E. 1400 N., Logan, UT 84321
Coburn Williams
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Poisonous Plant Res. Lab., 1150 E. 1400 N., Logan, UT 84321
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Abstract

Velvet lupine planst were defoliated (50% of upper foliage) in 1983 and 1984 to determine total alkaloid concentration (TAC), percent crude protein (CP), and fiber in regrowth foliage. TAC in regrowth leaves was 15% lower than in the original leaves removed at the beginning of the study. Percent CP of regrowth leaves was 22% lower than in original defoliated leaves. Alkaloids and CP did not increase in response to defoliation stress from simulated herbivory as plant defense theories predicted.

Keywords

Velvet lupineLupinus leucophyllus Dougl. # LUPLEPoisonous plantplant chemical defensecrude proteinneutral detergent fiberLUPLE
Type
Research
Information
Weed Technology , Volume 2 , Issue 4 , October 1988 , pp. 429 - 432
Copyright
Copyright © 1988 by the Weed Science Society of America 

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