Fruit body formation of lentinula edodes by pulse electric field stimulations

Takaki, Koichi; Yamaguchi, Ryo; Yamazaki, Noriyuki; Mukaigawa, Seiji; Fujiwara, Tamiya; Kofujita, Hisayoshi; Takahasi, K.; Sakamoto, Yuichi; Narimatsu, Maki; Nagane, K.

doi:10.1109/ppc.2009.5386172

Cited by 5 publications

(10 citation statements)

References 10 publications

(10 reference statements)

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“…The pulsed power generator was constructed based on an IES system and was used to generate pulsed high voltages as electrical stimulation for mushrooms. The IES pulsed power generator basically consisted of primary energy storage capacitors, closing switches, a secondary energy storage inductor, and an opening switch [ 7 , 11 , 12 ]. The four primary energy storage 0.22 µF capacitors were connected in parallel and were charged up using a high-voltage dc power supply (50 kV maximum voltage).…”

Section: Methodsmentioning

confidence: 99%

“…The application of a pulsed high voltage to improve the yield in edible mushroom cultivation has also been attempted by some research groups. The fruiting capacity of shiitake mushroom ( Lentinula edodes ; L. edodes ) was remarkably promoted by applying a pulsed high voltage to log wood [ 5 , 6 , 7 ]. This effect was also recognized in L. edodes fruiting on a mature sawdust-based substrate [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Inductive energy storage (IES) pulsed power generators have favorable features for mushroom-cultivating applications, e.g., they are compact, cost effective, light, and have high voltage amplification compared with capacitive energy storage generators such as the impulse generator [ 15 , 16 ]. The yield of L. edodes fruiting bodies was improved with high-voltage stimulation generated by the IES pulsed power generators [ 6 , 7 ]. The effect of the pulsed voltage stimulation on some other types of mushroom such as P .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Electrical Stimulation on Fruit Body Formation in Cultivating Mushrooms

et al. 2014

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The effect of high-voltage electrical stimulation on fruit body formation in cultivating mushrooms was evaluated using a compact pulsed power generator designed and based on an inductive energy storage system. An output voltage from 50 to 130 kV with a 100 ns pulse width was used as the electrical stimulation to determine the optimum amplitude. The pulsed high voltage was applied to a sawdust-based substrate of Lyophyllum decastes and natural logs hosting Lentinula edodes, Pholiota nameko, and Naematoloma sublateritium. The experimental results showed that the fruit body formation of mushrooms increased 1.3–2.0 times in terms of the total weight. The accumulated yield of Lentinula edodes for four cultivation seasons was improved from 160 to 320 g by applying voltages of 50 or 100 kV. However, the yield was decreased from 320 to 240 g upon increasing the applied voltage from 100 to 130 kV. The yield of the other types of mushrooms showed tendencies similar to those of Lentinula edodes when voltage was applied. An optimal voltage was confirmed for efficient fruit body induction. The hypha activity was evaluated by the amount of hydrophobin release, which was mainly observed before the fruit body formation. The hydrophobin release decreased for three hours after stimulation. However, the hydrophobin release from the vegetative hyphae increased 2.3 times one day after the stimulation.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Electrical Stimulation on Fruit Body Formation in Cultivating Mushrooms

et al. 2014

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“…found that pulsed electricity applied to the growing area increases mushroom yield. [ 63 ] The electricity may work by increasing the bioavailability of nutrients. In fact, another research group explored the effect of lightning on metal mobilization and its increased bioavailability after a strike; [ 64 ] and another describes the mobilization of phosphorus for ecosystem use after a strike.…”

Section: Results and Analysismentioning

confidence: 99%

Lightning for Energy and Material Uses: A Structured Review

Helman

2020

Global Challenges

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The average atmospheric charge density of Earth is neutral. Charge built up from thunderstorms and lightning phenomena is offset by oceanic surface charging, and offers a source of energy that has not been harnessed broadly. Unfortunately, the total terrestrial energy of the Earth’s atmospheric electrical system is modest (250–500 MW) compared to industrial requirements: Innovations are likely to offer improvements to societal efficiency rather than broad transformations. Direct capture systems located in places with very high occurrence of lightning discharge can generate ≈1 kWh per year on average. Material processing via triggered lightning is limited to techniques that utilize rapid discharges, e.g., metal and glass preprocessing of materials, waste volume reduction, biomass energy conversion, where current prices make plasma‐arc processes prohibitive. Triggered lightning may be used to assist blasting of mountain rock; or as a high‐voltage input for processes such as nuclear fusion. Passive collection of atmospheric electricity is modest but may be used in urban agriculture to increase biomass production. Thunderstorm charge‐separation processes suggest a new class of electricity generators based on kinetic energy and material collision. Ball lightning suggests additional research in dusty plasmas. These methods are all at proof‐of‐concept or early translation stages.

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“…The application of a pulsed high voltage to improve the yield in edible mushroom cultivation has also been attempted by some research groups. The fruiting capacity of shiitake mushroom ( L. edodes; L. edodes ) was remarkably promoted by applying a pulsed high voltage to log wood [1,2,3]. This effect was also recognized in L. edodes fruiting on a mature sawdust-based substrate [4,5].…”

Section: Introductionmentioning

confidence: 99%

Development of Compact High-Voltage Power Supply for Stimulation to Promote Fruiting Body Formation in Mushroom Cultivation

et al. 2018

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The compact high-voltage power supply is developed for stimulation to promote fruiting body formation in cultivating L. edodes and Lyophyllum deeastes Sing. mushrooms. A Cockcroft-Walton (C-W) circuit is employed to generate DC high-voltage from AC 100 V plug power for the compact, easy handling and high safety use in the hilly and mountainous area. The C-W circuit is connected to high-voltage coaxial cable which works for high-voltage transmission and for charging up as energy storage capacitor. The output voltage is around 50 kV with several microseconds pulse width. The dimension and weight of the developed power supply are 0.4 × 0.47 × 1 m3 and 8.1 kg, respectively. The effect of the high-voltage stimulation on enhancement of fruiting body formation is evaluated in cultivating L. edodes and Lyophyllum deeastes Sing. mushrooms using the developed compact high-voltage power supply. The conventional Marx generator is also used for comparison in effect of high-voltage stimulation for fruiting body formation. L. edodes is cultivated with hosting to natural logs and the pulsed high voltage is applied to the cultivated natural logs. The substrate for Lyophyllum deeastes Sing. cultivation consists of sawdust. The results show that the fruiting body formation of mushrooms of L. edodes for four cultivation seasons and that of Lyophyllum deeastes Sing. for two seasons both increase approximately 1.3 times higher than control group in terms of the total weight. Although the input energy per a pulse is difference with the generators, the improvement of the fruit body yield mainly depends on the total input energy into the log. The effect for promotion on fruiting body formation by the developed compact high-voltage power supply is almost same that by the conventional Marx generator.

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Fruit body formation of lentinula edodes by pulse electric field stimulations

Cited by 5 publications

References 10 publications

Effect of Electrical Stimulation on Fruit Body Formation in Cultivating Mushrooms

Effect of Electrical Stimulation on Fruit Body Formation in Cultivating Mushrooms

Lightning for Energy and Material Uses: A Structured Review

Development of Compact High-Voltage Power Supply for Stimulation to Promote Fruiting Body Formation in Mushroom Cultivation

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