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Microorganisms Associated with Velvetleaf (Abutilon theophrasti) Seeds on the Soil Surface

Published online by Cambridge University Press:  12 June 2017

Robert J. Kremer
Robert J. Kremer*
Affiliation:
U.S. Dep. Agric., Agric. Res. Ser., Univ. Missouri. Columbia 65211 Dep. Agron., Univ. Missouri. Columbia 65211
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Abstract

The relationships between microorganisms and velvetleaf (Abutilon theophrasti Medic. # ABUTH) seeds in contact with soil were studied to determine microbial effects on velvetleaf seed viability. The characteristic seed microbial association persisted on velvetleaf seeds placed on the soil surface during 32 days of incubation. The fungal association comprised of Alternaria alternata (Fr.) Keissl., Cladosporium cladosporioides (Fres.) de Vries, Epicoccum purpurascens Ehrenb. ex Schlecht, and Fusarium spp. was detected on over 50% of the seeds during incubation. Establishment of soil microorganisms on 50% of seeds occurred at only one sampling date. Such establishment was largely unsuccessful due to the effective barrier presented by seedborne microorganisms. Seedborne and soilborne microorganisms were unable to reduce viability of velvetleaf seeds in contact with soil as the total viability of all seeds tested exceeded 90% during incubation. Velvetleaf seedborne microorganisms may augment seed longevity on and in soils by acting as a barrier to potential seed decomposers originating from soil.

Keywords

Deterioration resistanceseed persistenceseed viabilityABUTH
Type
Weed Biology and Ecology
Information
Weed Science , Volume 34 , Issue 2 , March 1986 , pp. 233 - 236
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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