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Effect of Small Broomrape (Orobanche Minor) on Red Clover Growth and Dry Matter Partitioning

Published online by Cambridge University Press:  20 January 2017

Ryan D. Lins ,
Jed B. Colquhoun  and
Carol A. Mallory-Smith
Ryan D. Lins*
Affiliation:
Former Research Assistant, Associate Professor, and Professor, Department of Crop and Soil Science, Oregon State University, 107 Crop Science Building, Corvallis, OR 97331
Jed B. Colquhoun
Affiliation:
Former Research Assistant, Associate Professor, and Professor, Department of Crop and Soil Science, Oregon State University, 107 Crop Science Building, Corvallis, OR 97331
Carol A. Mallory-Smith
Affiliation:
Former Research Assistant, Associate Professor, and Professor, Department of Crop and Soil Science, Oregon State University, 107 Crop Science Building, Corvallis, OR 97331
*
Corresponding author's E-mail: [email protected]
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Abstract

Small broomrape is a parasite of several broadleaf plant species. Consequences of small broomrape infestation in host cropping systems include seed contamination, reduction in crop seed yield, and host plant death. The effect of small broomrape parasitism on the biomass partitioning of its primary host, red clover, has not been documented. Greenhouse experiments were conducted to determine the relationship between small broomrape and red clover biomass accumulation. Total biomass of parasitized red clover plants was 15 to 51% less than nonparasitized red clover plants. Small broomrape parasitism reduced the amount of dry matter allocated to red clover inflorescences by 50 to 80%. Small broomrape dry matter accumulation was strongly related to total red clover–small broomrape dry matter accumulation. Small broomrape attachment number per red clover plant was a poor indicator of relative small broomrape dry weight accumulation. The results of this study indicated that small broomrape accumulated resources from red clover at the greatest expense to the economically important reproductive tissues.

Keywords

Small broomrape, Orobanche minor Sm. ORAMIred clover, Trifolium pratense L. TRFPRBiomass partitioningparasitic plant
Type
Weed Management
Information
Weed Science , Volume 55 , Issue 5 , October 2007 , pp. 517 - 520
Copyright
Copyright © Weed Science Society of America 

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References

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