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Relative Canopy Height Influences Wild Oat (Avena fatua) Seed Viability, Dormancy, and Germination

The environment in which a plant grows (maternal environment) can affect seed viability, germination, and dormancy. We assessed the effects of maternal environment on wild oat seed viability, germination, dormancy, and pathogen infection by collecting and analyzing wild oat seed from above and below... Full description

Journal Title: Weed science 2013, Vol.61 (4), p.564-569
Main Author: Lehnhoff, Erik A.
Other Authors: Miller, Zachariah J. , Brelsford, Monica J. , White, Sherry , Maxwell, Bruce D.
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: 810 East 10th Street, Lawrence, KS 66044-8897: Weed Science Society of America
ID: ISSN: 0043-1745
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recordid: cdi_proquest_miscellaneous_1468381679
title: Relative Canopy Height Influences Wild Oat (Avena fatua) Seed Viability, Dormancy, and Germination
format: Article
creator:
  • Lehnhoff, Erik A.
  • Miller, Zachariah J.
  • Brelsford, Monica J.
  • White, Sherry
  • Maxwell, Bruce D.
subjects:
  • Avena fatua
  • bacteria
  • barley
  • Biological and medical sciences
  • canopy
  • Cereals
  • Competition
  • crop height
  • crops
  • demography
  • Dormancy
  • environmental factors
  • Fundamental and applied biological sciences. Psychology
  • Fungi
  • Germination
  • Herbicides
  • Hordeum vulgare
  • Influence
  • maternal effects
  • microclimate
  • Microorganisms
  • Oats
  • Overstory
  • Parasitic plants. Weeds
  • pathogens
  • Phytopathology. Animal pests. Plant and forest protection
  • Population
  • seed decay
  • seed germination
  • seedbank
  • Seeds
  • Understory
  • Vegetation canopies
  • Viability
  • WEED BIOLOGY AND ECOLOGY
  • weed demography
  • weed management
  • Weeds
ispartof: Weed science, 2013, Vol.61 (4), p.564-569
description: The environment in which a plant grows (maternal environment) can affect seed viability, germination, and dormancy. We assessed the effects of maternal environment on wild oat seed viability, germination, dormancy, and pathogen infection by collecting and analyzing wild oat seed from above and below a barley canopy at three field sites in Montana. The viability of wild oat seed collected below a crop canopy was consistently less than it was for seed from the overstory but varied among sites and years. Reductions in viability because of relative canopy position ranged from 10% to 30%. Effects of position relative to crop canopy on weed seed germination/dormancy rates varied by site and suggest that the direction and magnitude of the effects of maternal environment on dormancy depend on environmental conditions. These effects may be driven by crop competition or by changes in seed pathogen pressure or both. Seven species each of fungi and bacteria were isolated from wild oat seeds. The only fungi causing reductions in seed viability (15%) was isolated from understory seeds, and several bacteria from both overstory and understory sources reduced seed germination. Results suggest that, in addition to the known weed-suppressive effects of using taller or earlier emerging varieties of crops, such crops can reduce weed spread through effects on weed seed demography because weeds growing beneath the crop canopy produce a reduced amount of viable seed that is less likely to germinate in the following year.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0043-1745
fulltext: fulltext
issn:
  • 0043-1745
  • 1550-2759
url: Link


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titleRelative Canopy Height Influences Wild Oat (Avena fatua) Seed Viability, Dormancy, and Germination
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creatorLehnhoff, Erik A. ; Miller, Zachariah J. ; Brelsford, Monica J. ; White, Sherry ; Maxwell, Bruce D.
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descriptionThe environment in which a plant grows (maternal environment) can affect seed viability, germination, and dormancy. We assessed the effects of maternal environment on wild oat seed viability, germination, dormancy, and pathogen infection by collecting and analyzing wild oat seed from above and below a barley canopy at three field sites in Montana. The viability of wild oat seed collected below a crop canopy was consistently less than it was for seed from the overstory but varied among sites and years. Reductions in viability because of relative canopy position ranged from 10% to 30%. Effects of position relative to crop canopy on weed seed germination/dormancy rates varied by site and suggest that the direction and magnitude of the effects of maternal environment on dormancy depend on environmental conditions. These effects may be driven by crop competition or by changes in seed pathogen pressure or both. Seven species each of fungi and bacteria were isolated from wild oat seeds. The only fungi causing reductions in seed viability (15%) was isolated from understory seeds, and several bacteria from both overstory and understory sources reduced seed germination. Results suggest that, in addition to the known weed-suppressive effects of using taller or earlier emerging varieties of crops, such crops can reduce weed spread through effects on weed seed demography because weeds growing beneath the crop canopy produce a reduced amount of viable seed that is less likely to germinate in the following year.
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subjectAvena fatua ; bacteria ; barley ; Biological and medical sciences ; canopy ; Cereals ; Competition ; crop height ; crops ; demography ; Dormancy ; environmental factors ; Fundamental and applied biological sciences. Psychology ; Fungi ; Germination ; Herbicides ; Hordeum vulgare ; Influence ; maternal effects ; microclimate ; Microorganisms ; Oats ; Overstory ; Parasitic plants. Weeds ; pathogens ; Phytopathology. Animal pests. Plant and forest protection ; Population ; seed decay ; seed germination ; seedbank ; Seeds ; Understory ; Vegetation canopies ; Viability ; WEED BIOLOGY AND ECOLOGY ; weed demography ; weed management ; Weeds
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descriptionThe environment in which a plant grows (maternal environment) can affect seed viability, germination, and dormancy. We assessed the effects of maternal environment on wild oat seed viability, germination, dormancy, and pathogen infection by collecting and analyzing wild oat seed from above and below a barley canopy at three field sites in Montana. The viability of wild oat seed collected below a crop canopy was consistently less than it was for seed from the overstory but varied among sites and years. Reductions in viability because of relative canopy position ranged from 10% to 30%. Effects of position relative to crop canopy on weed seed germination/dormancy rates varied by site and suggest that the direction and magnitude of the effects of maternal environment on dormancy depend on environmental conditions. These effects may be driven by crop competition or by changes in seed pathogen pressure or both. Seven species each of fungi and bacteria were isolated from wild oat seeds. The only fungi causing reductions in seed viability (15%) was isolated from understory seeds, and several bacteria from both overstory and understory sources reduced seed germination. Results suggest that, in addition to the known weed-suppressive effects of using taller or earlier emerging varieties of crops, such crops can reduce weed spread through effects on weed seed demography because weeds growing beneath the crop canopy produce a reduced amount of viable seed that is less likely to germinate in the following year.
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abstractThe environment in which a plant grows (maternal environment) can affect seed viability, germination, and dormancy. We assessed the effects of maternal environment on wild oat seed viability, germination, dormancy, and pathogen infection by collecting and analyzing wild oat seed from above and below a barley canopy at three field sites in Montana. The viability of wild oat seed collected below a crop canopy was consistently less than it was for seed from the overstory but varied among sites and years. Reductions in viability because of relative canopy position ranged from 10% to 30%. Effects of position relative to crop canopy on weed seed germination/dormancy rates varied by site and suggest that the direction and magnitude of the effects of maternal environment on dormancy depend on environmental conditions. These effects may be driven by crop competition or by changes in seed pathogen pressure or both. Seven species each of fungi and bacteria were isolated from wild oat seeds. The only fungi causing reductions in seed viability (15%) was isolated from understory seeds, and several bacteria from both overstory and understory sources reduced seed germination. Results suggest that, in addition to the known weed-suppressive effects of using taller or earlier emerging varieties of crops, such crops can reduce weed spread through effects on weed seed demography because weeds growing beneath the crop canopy produce a reduced amount of viable seed that is less likely to germinate in the following year.
cop810 East 10th Street, Lawrence, KS 66044-8897
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