Regulation of Avena Fatua Seed Germination by Smoke Solutions, Gibberellin A3 and Ethylene

Kępczyński, Jan; Białecka, Bożena; Light, M.E.; Staden, J. Van

doi:10.1007/s10725-006-0008-4

Cited by 27 publications

(23 citation statements)

References 50 publications

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“…2b, d). The data presented are also in agreement with earlier results showing that aqueous smoke extract produced from burnt Themeda triandra leaves also removes dormancy in A. fatua florets and caryopses (Kępczyński et al 2006). The reaction of A. fatua florets or seeds to SW, like in the case of T. triandra seeds (Baxter et al 1995), was independent of plant material used for smoke production.…”

Section: Discussionsupporting

confidence: 91%

“…Dormant caryopses can be induced to germinate by a variety of factors, e.g. dry storage (Foley 1994;Kępczyński et al 2013), gibberellins (Adkins et al 1986;Kępczyński et al 2006Kępczyński et al , 2013, plant-derived smoke (Adkins and Peters 2001;Kępczyński et al 2006) and karrikinolide (3-methyl-2H-furo [2,3-c]pyran-2-one, KAR 1 ) (Daws et al 2007;Stevens et al 2007;Kępczyński et al 2010Kępczyński et al , 2013, a compound identified in smoke (Flematti et al 2004;Van Staden et al 2004).…”

Section: Introductionmentioning

confidence: 99%

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Plant-derived smoke induced activity of amylases, DNA replication and β-tubulin accumulation before radicle protrusion of dormant Avena fatua L. caryopses

Cembrowska-Lech

Kępczyński

2016

Acta Physiol Plant

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Florets of Avena fatua (wild oat) did not germinate at temperatures from 5 to 35°C, nor did caryopses at 5 and above 15°C. Smoke-water (SW) was found to partly or substantially induce dormant florets and caryopses to germinate at temperatures from 10 to 25°C, whereby almost all caryopses germinated at 15 and 20°C. When florets were dry-stored at 25°C for 4 months, their dormancy, and that of florets was markedly or completely, respectively, removed at 20°C. Floret and caryopsis SW demand decreased with time of dry storage. Paclobutrazol, a gibberellin biosynthesis inhibitor, completely antagonized the stimulatory effect of SW on germination of caryopses. Gibberellic acid (GA 3 ) reversed inhibition caused by paclobutrazol applied alone or in combination with SW. SW enhanced a-and b-amylase activities in caryopses before radicle protrusion. SW increased a-amylase activity and reduced starch content more effectively in intact caryopses than in embryoless ones. SW enhanced btubulin accumulation and the transition from G 1 to S and also from S to G 2 phases before radicle protrusion. The results presented indicate that florets are more dormant than caryopses and less sensitive to SW at incubation temperatures from 20°C. Germination induction of dormant Avena fatua caryopses by SW required gibberellin biosynthesis. SW induction of dormant caryopsis germination involves mobilization of starch and cell cycle activation.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Plant-derived smoke induced activity of amylases, DNA replication and β-tubulin accumulation before radicle protrusion of dormant Avena fatua L. caryopses

Cembrowska-Lech

Kępczyński

2016

Acta Physiol Plant

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“…Dormancy of A. fatua caryopses was removed in our experiments by KAR 1 at very low concentration (10 -8 M). Ethylene, liberated from ethephon, applied as a gas or converted from the exogenous precursor of its biosynthesis, ACC, which was shown previously to increase ethylene biosynthesis in germinating dormant A. fatua caryopses (Kępczyński et al 2006b) was not able to remove dormancy (Fig. 2).…”

Section: Discussionmentioning

confidence: 82%

“…Smoke contains many compounds besides the KAR 1 , some of which may inhibit germination (Light et al 2010). Both smoke and the KAR 1 stimulate germination of partially dormant caryopses (seeds) of Avena fatua, an important widespread, persistent weed, which infests agricultural soils for several years (Adkins and Peters 2001;Kępczyński et al 2006b;Daws et al 2007;Stevens et al 2007). This compound completely removed dormancy in A. fatua caryopses at 15-25°C when used continuously (Kępczyński et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Interaction of karrikinolide and ethylene in controlling germination of dormant Avena fatua L. caryopses

Kępczyński

Staden

2012

Plant Growth Regul

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Caryopses of Avena fatua L. are dormant after harvest and germinate poorly at 20°C. Dormancy was released by after-ripening the dry caryopses in the dark at 25°C for 3 months. Karrikinolide (butenolide, 3-methyl-2H-furo[2,3-c]pyran-2-one, KAR 1 ), in contrast to exogenous ethylene and the precursor of ethylene biosynthesis 1-aminocyclopropane-1-carboxylic acid (ACC), completely overcame dormancy. The effect of KAR 1 was not affected by aminoethoxyvinylglycine (AVG), a-aminoisobutyric acid (AIB) and CoCl 2 , inhibitors of ACC synthase and oxidase, respectively. 2,5-Norbornadiene (NBD), a reversible inhibitor of ethylene binding to its receptor, counteracted the stimulatory effect of KAR 1 . Ethylene, ethephon and ACC counteracted and AVG reinforced inhibition caused by norbornadiene. Inhibition due to norbornadiene, applied during the first 3 days of imbibition in the presence of KAR 1 , disappeared after transfer to air or ethylene. The obtained results confirm that KAR 1 breaks dormancy and indicate that ethylene alone plays no role in releasing dormancy of Avena fatua caryopses. KAR 1 probably did not relieve dormancy via the stimulation of ethylene biosynthesis. Some level of endogenous ethylene is probably required for ethylene action, which might be required for releasing dormancy by KAR 1 or for subsequent germination of caryopses after removing dormancy.

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“…This dormancy was completely released at temperatures below 30°C by smoke-water. Previous results showed that smoke-water caused total germination of partially dormant A. fatua seeds (Adkins and Peters 2001;Kępczyński et al 2006). Butenolide was a very active dormancy breaking factor at very low concentrations (10 -8 M) and could remove completely or partially deep dormancy in seeds at 15-25°C.…”

Section: Discussionmentioning

confidence: 86%

Releasing primary dormancy in Avena fatua L. caryopses by smoke-derived butenolide

2010

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The effect of smoke and smoke-derived butenolide in releasing dormancy of caryopses (referred to as seeds) of the economically important weed Avena fatua L. was studied. Seeds of A. fatua are dormant after harvest. Both smoke-water and butenolide, applied continuously, removed dormancy in darkness at 15, 20 and 25°C and slightly at 30°C. Butenolide was very active at a concentration of 10 -8M. Butenolide at 10 -8 M was also able to remove dormancy at 20°C when applied for 12 or 24 h at 4°C or for 3 to 24 h at 20°C. Sensitivity to butenolide decreased with longer preincubation times in water. This compound was less effective in releasing dormancy in the light than in darkness. Dormancy release by butenolide involves induction of cell-cycle activity just before coleorhiza protrusion. Stimulatory effects of smoke-water and butenolide were also observed in respect of seedling growth and vigor.

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Regulation of Avena Fatua Seed Germination by Smoke Solutions, Gibberellin A3 and Ethylene

Cited by 27 publications

References 50 publications

Plant-derived smoke induced activity of amylases, DNA replication and β-tubulin accumulation before radicle protrusion of dormant Avena fatua L. caryopses

Plant-derived smoke induced activity of amylases, DNA replication and β-tubulin accumulation before radicle protrusion of dormant Avena fatua L. caryopses

Interaction of karrikinolide and ethylene in controlling germination of dormant Avena fatua L. caryopses

Releasing primary dormancy in Avena fatua L. caryopses by smoke-derived butenolide

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