Germination of dormant seeds of Stylosanthes humilis as promoted by ethylene accumulation in closed environments

Ribeiro, Dimas M.; Barros, Raimundo Santos

doi:10.1590/s1677-04202004000200003

Cited by 4 publications

(5 citation statements)

References 12 publications

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“…The positive regulation of germination by ethylene evolved from ethrel solution was observed for dormant Fagus silvatica seeds (Calvo et al 2004). Gaseous ethylene also removed dormancy and stimulated germination of Stylosanthes humilis seeds (Ribeiro and Barros 2004). As reported previously HCN pretreatment breaks dormancy of apple embryos (Bogatek et al 1991(Bogatek et al , 2003.…”

Section: Discussionsupporting

confidence: 63%

Breaking the apple embryo dormancy by nitric oxide involves the stimulation of ethylene production

Gniazdowska

Dobrzynska

Babanczyk

et al. 2007

Planta

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Mature seeds of apple (Mallus domestica Borb. cv. Antonówka) are dormant and do not germinate unless their dormancy is removed by several weeks of moist-cold treatment. We investigated the effect of short-term (3 h) nitric oxide (NO) pretreatment on breaking of apple embryonic dormancy expressed as inhibition of germination and morphological abnormalities of young seedlings. Imbibition of embryos isolated from dormant apple seeds with sodium nitroprusside (SNP) or S-nitroso,N-acetyl penicillamine (SNAP) as NO donors resulted in enhanced germination. Moreover, NO treatment removed morphological abnormalities of seedlings developing from dormant embryo. The NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-teramethylimidazoline-1-oxyl-3 oxide (cPTIO) removed the above effects. NO-mediated breaking of embryonic dormancy correlated well with enhanced ethylene production. Inhibitor of ethylene synthesis (AOA) reversed the stimulatory effect of NO donors on embryo germination. Additionally SNP reduced embryo sensitivity to exogenously applied ABA ensuing dormancy breakage. We can conclude that NO acts as a regulatory factor included in the control of apple embryonic dormancy breakage by stimulation of ethylene biosynthesis.

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Section: Discussionsupporting

confidence: 63%

Breaking the apple embryo dormancy by nitric oxide involves the stimulation of ethylene production

Gniazdowska

Dobrzynska

Babanczyk

et al. 2007

Planta

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“…In the first, seeds were provided with AVG plus Co 2þ , and germination and ethylene accumulation in the flask atmosphere were monitored. Table 1 shows that germination and ethylene production were impaired completely by the inhibitors only in dormant seeds; in water some ethylene was produced and, as consequence of its accumulation, some germination occurred (Ribeiro and Barros, 2004a). The inhibitors depressed ethylene production by non-dormant seeds to a very large extent, but germination was still appreciable, above 20% (Table 1), under the same conditions without added ethylene (Fig.…”

Section: Resultsmentioning

confidence: 81%

“…1), which might cast some doubt on the role of the regulator in seed germination. However, because the unavailability of endogenous free ACC seems to constitute an impairment for germination of dormant seeds (Pinheiro, 2004) and because they also respond to applied ACC and CEPA (Vieira and Barros, 1994), and more promptly to ethylene itself (Ribeiro and Barros, 2004a), ethylene is likely to be involved in germination. Three approaches were adopted to ascertain this.…”

Section: Resultsmentioning

confidence: 99%

“…), a tropical annual forage legume, possess a relatively hard cover and, when freshly harvested, also display physiological dormancy that is gradually overcome with seed ageing (Vieira and Barros, 1994). Germination of scarified, dormant seeds is promoted by the ethylene-producing compounds, 2-chloroethylphosphonic acid (CEPA, an ethylene-releasing compound) and 1-aminocyclopropane-1-carboxylic acid (ACC) (Vieira and Barros, 1994), or by ethylene itself (Ribeiro and Barros, 2004a). Furthermore, imbibed non-dormant seeds produce as much as 10-to 12-fold more ethylene than dormant seeds (Pelacani et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity to ethylene as a major component in the germination of seeds of Stylosanthes humilis

Ribeiro

Barros

2006

Seed Sci. Res.

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Physiological dormancy of scarified seeds of Townsville stylo (Stylosanthes humilisH.B.K.) is broken by ethylene. When the biosynthesis of this gas was impaired by 2-aminoethoxyvinylglycine (AVG) plus Co2+, the response to ethylene at very low concentrations was appreciable in non-dormant seeds and nil in the dormant ones. Complete inhibition of germination of non-dormant seeds occurred only when they were treated with AVG plus Co2+under an ethylene-free atmosphere, a condition in which no trace of the gas in the atmosphere of Erlenmeyer flasks could be detected. Injection of ethylene into that system triggered germination of both dormant and non-dormant seeds, demonstrating a requirement for the gas. Non-dormant seeds were at least 50-fold more sensitive to ethylene than the dormant ones. Perception of ethylene occurred within a very short time (at most 15 min), since exposure of both dormant and non-dormant seeds to the gas, at a steeply declining concentration, sufficed to cause substantial germination.

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“…Nano-fertilizers can increase the effectiveness of nutrient use three-fold, as well as provide improved stress resistance [2]. The rate of germination is affected by environmental factors such as abiotic stress, including draught, low temperatures [3], salination [4], and heavy metal toxicity [5]. Many researchers have also studied the impact of nanoparticles on the germination and growth of plants with a view to promoting the use of such compounds in agriculture [6].…”

Section: Introductionmentioning

confidence: 99%

Impact of Inorganic Metal (Ag, Cu) Nanoparticles on the Quality of Seeds and Dried Rapeseed Sprouts

et al. 2022

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The present study focuses on the impact of copper and silver nanoparticles on the chemical composition and physical properties of rapeseeds and rape sprouts. The seeds and sprouts were obtained from winter rape grown in a three-year cultivation (2018–2020) treated with silver (AgNP) and copper (CuNP) nanoparticles. In addition, the effect of the freeze-drying temperature (20; 40; 60 °C) on selected properties of the sprouts was studied. Spraying growing plants with nanoparticles resulted, in most cases, and depending on the year, in a reduction in the mass of seeds (MTS) by 9.5% (single nanoparticles spray ×1 CuNP in 2018), an increase in the fat content (by 8.80% for ×1 CuNP in 2018), a reduction in the protein content (by 12.93% for ×1 CuNP in 2018) and flavonoid content (by up to 58% for ×1 AgNP and CuNP in 2018), as well as increase in the glucosinolates content by 25% (for double nanoparticles spray ×2 AgNP in 2019). For the sprouts obtained from the rapeseeds, in most cases, a decrease in the content of flavonoids was observed (26.68% for ×1 AgNP; 20 °C in 2018), depending on the year of cultivation, the nanoparticles used, and the drying temperature. The obtained results remain inconclusive, which encourages the authors to undertake further research.

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Germination of dormant seeds of Stylosanthes humilis as promoted by ethylene accumulation in closed environments

Cited by 4 publications

References 12 publications

Breaking the apple embryo dormancy by nitric oxide involves the stimulation of ethylene production

Breaking the apple embryo dormancy by nitric oxide involves the stimulation of ethylene production

Sensitivity to ethylene as a major component in the germination of seeds of Stylosanthes humilis

Impact of Inorganic Metal (Ag, Cu) Nanoparticles on the Quality of Seeds and Dried Rapeseed Sprouts

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