STUDIES ON THE PERSISTENCE OF <i>AVENA FATUA</i>

Banting, J. D.

doi:10.4141/cjps66-021

Cited by 52 publications

(28 citation statements)

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“…4. Comparison of the wild oat (A venafatua) putative aldose reductase amino acid sequence with that of bromegrass (Bromus inermis) [25] and barley (Hordeum vulgare) [3]. A dash ( -) indicates an amino acid match with the corresponding amino acid in wild oat aldose reductase.…”

Section: Discussionmentioning

confidence: 99%

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Cloning and characterization of differentially expressed genes in imbibed dormant and afterripened Avena fatua embryos

Foley

1995

Plant Mol Biol

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To analyze the patterns of gene expression associated with seed dormancy in wild oat (Avenafatua), we have isolated cDNA clones corresponding to genes that are differentially expressed in dormant and afterripened line M73 embryos. Gene transcripts of these clones were maintained in embryos of imbibed dormant caryopses, but declined rapidly in afterripened embryos after imbibition. GA3 treatment of dormant caryopses, which breaks dormancy, could lower the transcript levels in dormant embryos. When the germination of afterripened caryopses was inhibited by high temperature (35 °C), the decline in abundance of the transcripts in afterripened embryos was arrested. These genes were expressed to various degrees in water-stressed, but not in unstressed, 7-day-old seedlings. The expression of the genes was also ABA-inducible in afterripened embryos. The expression patterns in non-dormant line SH430 wild oat were similar to those of afterripened M73. DNA sequence analyses indicated that some of the cDNA clones encode LEA (late embryogenesis-abundant) proteins and aldose reductase. The significance of the expression of these genes in maintaining seed dormancy or longevity is discussed.

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Section: Discussionmentioning

confidence: 99%

“…In fact, seed dormancy and longevity have been considered inseperable characteristics [2]. Embryo dormancy seems to be crucial for the long-term persistance of wild oat observed in some Canadian populations [3]. In contrast, wild oat lacking embryo dormancy have a relatively short persistence in the soil [41].…”

Section: Discussionmentioning

confidence: 99%

Cloning and characterization of differentially expressed genes in imbibed dormant and afterripened Avena fatua embryos

Foley

1995

Plant Mol Biol

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“…Late germinating families might tend to escape the selection sieve owing to the volatility of the herbicide, which ordinarily is applied to the soil in the autumn or in the early spring. Also, only a fraction of the population constituting the seed bank in the soil germinates in any given season, because some seeds are known to remain dormant but viable for as long as 7 years in soil (Banting 1966). In westem Canada, where summer fallowing is a common agronomic practice, selection favours genotypes which confer long-term seed dormancy.…”

Section: Discussionmentioning

confidence: 99%

Adaptation for herbicide tolerance in populations of Avena fatua

Jana¹,

Naylor²

1982

Can. J. Bot.

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JANA, S., and J. M. NAYLOR. 1982. Adaptation for herbicide tolerance in populations of Avena fatua. Can. J. Bot. 60: 161 1-1617. A study was conducted to determine whether recurrent treatment of wild oat populations with triallate results in increased tolerance of this herbicide. Among several parameters of seedling growth investigated, percentage emergence, seedling survival, and length of the first leaf were found to be most useful in assessing response to this compound. The results revealed a substantial within-population variability for tolerance. Evidence is presented that recurrent herbicide treatment of wild oat populations by the methods commonly used in the control of this weed species in western Canada results in increased tolerance of triallate. JANA, S., et J. M. NAYLOR. 1982. Adaptation for herbicide tolerance in populations of Avena fatua. Can. J. Bot. 60: 161 1-1617.Les auteurs ont effectuC une Ctude pour dkterminer si un traitement recurrent de populations d'Avena fatua par le triallate pourrait provoquer le dkveloppement de la tolirance a cet herbicide. Parmi plusieurs paramktres de lacroissance des plantules qui ont Ct C mesurks, le pourcentage d'kmergence, la survie des plantules et la longueur de la premikre feuille se sont avCrCes les plus utiles pour Cvaluer la reaction a cet herbicide. Les rCsultats montrent une variabilitk importante pour la tolCrance a 1'intCrieur des populations. Des donnCes indiquent qu'un traitement herbicide ricurrent des populations d'Avena fatua par les mCthodes couramrnent utilisCes dans l'ouest du Canada pour combattre cette plante nuisible pourrait provoquer une augmentation de la tolCrance au triallate.[Traduit par le journal]

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“…Burying weed seeds with tillage operations increases the number of weed seeds in the soil seed bank and may cause these seeds to persist longer than seeds remained on the soil surface, potentially setting the stage for future weed problems. Banting (1966) found that wild oat seeds buried below a depth of 5 cm remained viable longer than seeds on the soil surface. More recently, Gulden et al (2003) found that canola seed lost during harvest could enter the state of secondary dormancy and persist for many years in the soil.…”

Section: Laboratory Experimentsmentioning

confidence: 99%

Do Tillage Methods Affect Germination and Species Similarity of Soil Weed Seeds Bank?

Shahgholi

Makarian

Shokati

et al. 2015

Acta Technologica Agriculturae

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Cultural practices such as tillage used for crop production influence the composition of the weed seed bank in the soil. In order to investigate the effects of different tillage methods on seed bank properties, species diversity and similarity, two laboratory and greenhouse experiments were carried out as randomized complete block design with four replications in 2011. Treatments included: once tillage per year (T1), twice tillage per year (T2), more than twice tillage (T3) and no tillage (T4). Laboratory results showed that the T3 and T4 treatments had the highest and the lowest observed seeds numbers, respectively. Between the laboratory observed weed seeds, the maximum weed seed numbers were Echinochloa crus-galli and Amaranthus retroflexus in the T3 treatment, while Chenopodium album, Polygonum aviculare and Cuscuta campestris had the highest seed numbers in the T2 treatment. At the greenhouse study, Chenopodium album, Amaranthus retroflexus and Hordeum morinum in the T2 treatment were dominant species. The highest diversity was observed in the T2 treatment, and Chenopodium album and Echinochloa crus-galli were dominant species in the T2 and T3 treatments. Maximum species similarity index was achieved from the T1 and T3 treatments. Thereby this study concluded that increasing of tillage number could affect the similarity index of weed seeds and subsequently alters the weed community composition.

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STUDIES ON THE PERSISTENCE OF AVENA FATUA

Abstract: In an attempt-to.determiue the persi

Cited by 52 publications

References 1 publication

Cloning and characterization of differentially expressed genes in imbibed dormant and afterripened Avena fatua embryos

Cloning and characterization of differentially expressed genes in imbibed dormant and afterripened Avena fatua embryos

Adaptation for herbicide tolerance in populations of Avena fatua

Do Tillage Methods Affect Germination and Species Similarity of Soil Weed Seeds Bank?

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