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Germination, Host Preference, and Phenolic Content of Witchweed (Striga hermonthica) Seed Populations

Published online by Cambridge University Press:  12 June 2017

Faiz F. Bebawi ,
Adil E. Awad  and
Sami A. Khalid
Faiz F. Bebawi
Affiliation:
Univ. Khartoum, Shambat, Sudan
Adil E. Awad
Affiliation:
Univ. Khartoum, Shambat, Sudan
Sami A. Khalid
Affiliation:
Univ. Khartoum, P.O. Box 1966, Khartoum, Sudan
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Abstract

Phenolic content, germination percentage, and host preference were compared among 11 seed populations of witchweed (Striga hermonthica (Del.) Benth. # STRHE). Significant differences in germination percentage occurred among the seed populations after preconditioning by their exposure to different durations of warm-moist conditions. Greatest percentage of seed germinated after 8 days of preconditioning. Preconditioning for more than 16 days reduced percentage germination. The host specificity range of witchweed seed populations that parasitized pearl millet [Pennisetum americanum (L.) K. Schum] was broader than were those seed populations that attacked sorghum [Sorghum bicolor (L.) Moench.]. Results of thin-layer chromatography indicated large variations in phenolic content among the witchweed seed populations.

Keywords

Germination inhibitorsSTRHE
Type
Weed Biology and Ecology
Information
Weed Science , Volume 34 , Issue 4 , July 1986 , pp. 529 - 532
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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