Germination Response of Dormant Tanglehead (Heteropogon contortus) Seeds to Smoke-infused Water and the Smoke-associated Stimulatory Compounds, Karrikinolide and Cyanide

Baldos, Orville C.; DeFrank, Joseph; Sakamoto, Glenn S.

doi:10.21273/hortsci.50.3.421

Cited by 11 publications

(7 citation statements)

References 48 publications

(90 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During this period, the SW treatment stimulated the germination of dry stored seeds in both daylight and darkness [39]. The authors emphasize the use of smoke-infused water for large-scale projects of the restoration of savanna, also previously postulated by Baldos et al [18].…”

Section: Ecological and Practical Implicationssupporting

confidence: 57%

“…This means that not only KAR1, but also other smoke-derived compounds stimulated seed germination. In this research and a paper [18], the interest is in the mode of action of different compounds acting individually (KARs, benzaldehydes, cyanohydrins and nitrates) or in concert when aerosol smoke or smoke-saturated water (smoke water, SW) is used. Technically, aerosol smoke and SW contain the same compounds as gaseous products of combustion.…”

Section: The Impact Of Smoke Formulations and Isolated Smoke Compound...mentioning

confidence: 99%

“…However, the existence of smoke-responsive plant species that did not react to KAR1 led to the discovery of other biologically active smoke chemicals: cyanohydrins glyceronitrile (2,3-dihydroxypropanenitrile) and mandelonitrile (MAN), hydroquinones, nitrates, and syringaldehyde [15,16]. These were found to be responsible for germination, and many papers and reviews described the use of some of these compounds as biostimulants [8,14,15,[17][18][19][20][21][22]. Moreover, a smoke-derived inhibitor of germination, 3,4,5-trimethylfuran-2(5H)-one or trimethylbutenolide (TMB), was identified [17,23,24].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Interplay of Light and Smoke Compounds in Photoblastic Seeds

Bączek-Kwinta

2022

Plants

View full text Add to dashboard Cite

Light increases the germinability of positively photoblastic seeds and inhibits the germination of negative ones. In an area where plant-generated smoke from fire is a periodically occurring environmental factor, smoke chemicals can affect the germination of seeds, including those that are photoblastically sensitive. Moreover, as smoke and its compounds, mostly karrikin 1, KAR1, have been used for priming the seeds of many species, including photoblastic ones, a systematic review of papers dealing with the phenomenon was conducted. The review indicates that the unification of experimental treatments (light spectrum, intensity and photoperiod, and KAR1 concentration within the species) could improve the quality of global research on the impact of smoke chemicals on photoblastic seeds, also at the molecular level. The review also reveals that the physiologically active concentration of KAR1 varies in different species. Moreover, the physiological window of KAR’s impact on germination can be narrow due to different depths of primary seed dormancy. Another concern is the mode of action of different smoke sources and formulations (aerosol smoke, smoke-saturated water), or pure smoke chemicals. The reason for this concern is the additive or synergetic effect of KARs, cyanohydrins, nitrates and other compounds, and the presence of a germination inhibitor, trimethylbutenolide (TMB) in smoke and its formulations. Obviously, environmental factors that are characteristic of the local environment need to be considered. From a practical perspective, seeds germinating faster in response to smoke chemicals can outcompete other seeds. Hence, a thorough understanding of this phenomenon can be useful in the restoration of plant habitats and the protection of rare species, as well as yielding an improvement in plants that are sown directly to the field. On the other hand, the application of smoke compounds can induce “suicidal germination” in the photoblastic seeds that are buried in the soil and deplete the soil seed bank of the local population of unwanted species.

show abstract

Section: Ecological and Practical Implicationssupporting

confidence: 57%

Section: The Impact Of Smoke Formulations and Isolated Smoke Compound...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Interplay of Light and Smoke Compounds in Photoblastic Seeds

Bączek-Kwinta

2022

Plants

View full text Add to dashboard Cite

show abstract

“…The existence of smoke-responsive species that do not respond to KAR1 (Downes, Lamont, Light, & Van Staden 2010;Flematti et al 2011) led to the discovery of a new germination cue, the cyanohydrin glyceronitrile (2,3-dihydroxypropanenitrile) (Flematti et al 2011). Furthermore, the stimulatory effects of cyanohydrin analogues, such as glycolonitrile, acetone cyanohydrin, 2,3,4-trihydroxybutyronitrile and mandelonitrile (hereafter 'MAN'), on germination have also been determined in several studies (Flematti et al 2011;Baldos, DeFrank, & Sakamoto 2015;Tavşanoglu et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of fire-derived chemicals on germination and seedling growth in Mediterranean plant species

Çatav

Küçükakyüz

Tavşanoğlu

et al. 2018

Basic and Applied Ecology

View full text Add to dashboard Cite

The promoting effect of smoke-derived chemicals (e.g. karrikinolide and cyanohydrin) on germination in many plants from Mediterranean-type ecosystems such as South Africa and southwestern Australia is well documented. However, very little is known about (1) the relative importance of different compounds and their possible interactive effects, (2) their role in enhancing seedling growth in wild plants, and (3) their effect on the germination of plants in the Mediterranean Basin. To fill these gaps in knowledge, we performed experiments to evaluate the effect of smoke water, karrikinolide, mandelonitrile (a cyanohydrin analogue), potassium nitrate and gibberellic acid on the germination and seedling growth of 37 species from the Mediterranean Basin. The results suggest that germination and/or seedling growth of 21 species are enhanced by at least one of the fire-derived chemicals. There were positive correlations between most of the compounds tested in terms of germination response, but synergetic and inhibitory effects were also detected. Stimulation of germination was most prominent in species with annual life cycles. Fire-derived chemicals were more effective in stimulating root growth than shoot growth. In conclusion, we provide novel evidence that the recruitment of different Mediterranean species may be enhanced by different smoke compounds, and that synergetic and inhibitory effects of chemical compounds are important in the germination ecology of plants.

show abstract

“…All treatments and rates resulted in zero germination, despite seeds exhibiting viability. The lack of response may indicate that the dormancy present is a nondeep to intermediate form of PD (Baldos et al, 2015;. D E S I C C A T I O N C H A M B E R CALIBRATION.…”

Section: Resultsmentioning

confidence: 99%

Torrid Panicgrass Dormancy Relief Through Exogenous Chemical Treatments and Seed Storage Optimization of Temperature and Relative Humidity Parameters

Lukas

DeFrank

Baldos

et al. 2019

hortte

Self Cite

View full text Add to dashboard Cite

Seed dormancy is an evolutionary adaptation for increasing seedling survival by delaying germination and is found in many families of seed plants. Although dormancy is ecologically important, it becomes problematic during agronomic production and restoration. Torrid panicgrass (Panicum torridum) is a native Hawaiian annual grass that has been identified as a re-vegetation candidate for seasonally dry areas. Torrid panicgrass seed appears to possess a nondeep to intermediate physiological dormancy. This research aimed to characterize dormancy relief parameters by 1) evaluating exogenous hormonal, reactive oxygen intermediates, and simulated combustion product treatments; and 2) determining optimized storage conditions of relative humidity (RH) and temperature over a 10-month duration. Results indicate that all exogenous chemical treatments tested were not effective at relieving the dormancy present in torrid panicgrass. Optimal storage conditions to relieve dormancy were found with seeds equilibrated to 12% RH, stored at 30 °C for a period of 8 months resulting in 55% germination. Maintenance of viability for long-term storage up to 10 months was best achieved with seeds stored at 12% RH at 10, 20, or 30 °C.

show abstract

Germination Response of Dormant Tanglehead (Heteropogon contortus) Seeds to Smoke-infused Water and the Smoke-associated Stimulatory Compounds, Karrikinolide and Cyanide

Cited by 11 publications

References 48 publications

An Interplay of Light and Smoke Compounds in Photoblastic Seeds

An Interplay of Light and Smoke Compounds in Photoblastic Seeds

Effect of fire-derived chemicals on germination and seedling growth in Mediterranean plant species

Torrid Panicgrass Dormancy Relief Through Exogenous Chemical Treatments and Seed Storage Optimization of Temperature and Relative Humidity Parameters

Contact Info

Product

Resources

About