Early Growth Effects of Nanosecond Pulsed Electric Field (nsPEFs) Exposure on <i>Haloxylon ammodendron</i>

Su, Bo; Guo, Junming; Nian, Weifeng; Feng, Hongqing; Wang, Kaile; Zhang, Jue; Fang, Jing

doi:10.1002/ppap.201400131

Cited by 25 publications

(28 citation statements)

References 48 publications

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“…As shown in Fig. 7a , the ORP decreased almost linearly with the pulsed electric filed intensity, changing from 61 to 40 mV, which was consistent with our previous work 25 . Recently, some studies proposed an economically competitive strategy based on ORP for improving fermentation efficiency, which suggest that ORP could serve as an index to evaluate the antibiotic production 39 40 41 .…”

Section: Resultssupporting

confidence: 92%

“…This point can also be evidenced from the work of B. Su et al . on seed growing, where the nsPEFs treatment with low intensity could elevate the germination rate of Haloxylon ammodendron seed, while high field intensity would lead to significant inhibition 25 .…”

Section: Resultsmentioning

confidence: 99%

“…Intense nsPEFs treatments with high field strength could induce apoptosis in human and mouse tumor cells 30 31 32 33 , bacterial inactivation with irreversible nanopores formation 34 , and DNA damage 35 . While, mild nsPEFs treatments with low field strength could activate intracellular signaling pathways 26 36 37 38 , improve the growth of Arabidopsis thaliana and Haloxylon ammodendron seeds, as well as enhance the cell proliferation 23 24 25 26 38 . Therefore, it is speculated that mild nsPEFs treatment in this study may not lead to the mutation of S. avermitilis .…”

Section: Resultsmentioning

confidence: 99%

“…More recently, an interest is growing in concerning the proliferation effect induced by nsPEFs under relatively low electric field strength. Several researches have been reported that nsPEFs could improve the growth of Arabidopsis thaliana 23 24 and Haloxylon ammodendron seeds 25 as well as enhance the proliferation and dedifferentiation of chondrocytes 26 . Inspired by the promising capability of nsPEFs for cell proliferation enhancement, we attempt to introduce this pulsed power technology to stimulate cell growth and to increase avermectins production of S. avermitilis .…”

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confidence: 99%

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Raising the avermectins production in Streptomyces avermitilis by utilizing nanosecond pulsed electric fields (nsPEFs)

Guo

et al. 2016

Sci Rep

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Avermectins, a group of anthelmintic and insecticidal agents produced from Streptomyces avermitilis, are widely used in agricultural, veterinary, and medical fields. This study presents the first report on the potential of using nanosecond pulsed electric fields (nsPEFs) to improve avermectin production in S. avermitilis. The results of colony forming units showed that 20 pulses of nsPEFs at 10 kV/cm and 20 kV/cm had a significant effect on proliferation, while 100 pulses of nsPEFs at 30 kV/cm exhibited an obvious effect on inhibition of agents. Ultraviolet spectrophotometry assay revealed that 20 pulses of nsPEFs at 15 kV/cm increased avermectin production by 42% and reduced the time for reaching a plateau in fermentation process from 7 days to 5 days. In addition, the decreased oxidation reduction potential (ORP) and increased temperature of nsPEFs-treated liquid were evidenced to be closely associated with the improved cell growth and fermentation efficiency of avermectins in S. avermitilis. More importantly, the real-time RT-PCR analysis showed that nsPEFs could remarkably enhance the expression of aveR and malE in S. avermitilis during fermentation, which are positive regulator for avermectin biosynthesis. Therefore, the nsPEFs technology presents an alternative strategy to be developed to increase avermectin output in fermentation industry.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Raising the avermectins production in Streptomyces avermitilis by utilizing nanosecond pulsed electric fields (nsPEFs)

Guo

et al. 2016

Sci Rep

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“…The authors suggest that this might have been caused by the release of calcium from internal stores, which was observed in the action of nsPEF on the cells of mammals (Eing et al 2009). Su et al (2015) studied the effect of pulsed electric field (nsPEFs) with intensity of 10, 20 and 30 kV·cm -1 and 100 ns on seed germination and on the height of seedlings of the tree saxaul (Haloxylon ammodendron). An increase of seed germination rate from 72.9% to 90.3% and 98%, respectively, was noted for the field intensities of 10 and 20 kV·cm -1 .…”

Section: ____________________________________________________________mentioning

confidence: 99%

The Use of Physical Factors for Seed Quality Improvement of Horticultural Plants

Krawiec

Dziwulska‐Hunek

Kornarzyński

2018

Journal of Horticultural Research

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Due to the common trend towards limitation of excessive use of chemicals in agriculture, there is a growth of interest in methods of seed quality improvement that would be safe for the environment. These include methods based on the effect of various physical factors, such as laser light, magnetic field, seed treatment with magnetized water, electric field. The work provides detailed information on the impact of seed stimulation of these factors on germination, growth, development and yielding of horticultural plants. Summarizing the results of the study, it can be concluded that the application of physical factors in appropriate doses can be an effective way to enhance many plant parameters that increase their productivity. The beneficial effects of seed stimulation are mainly related to the first stages of plant life, i.e. – germination, emergence and growth of seedlings. In many cases, the enhancement of these features is also the result of the increase of plant yields. The increase of yield is even several dozen percent. The results of the study encourage the implementation of these physical methods of seed quality improvement into agricultural and horticultural practice.

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Pulsed power applications for agriculture and food processing

Takaki

Takahashi

Hayashi³

et al. 2021

Rev. Mod. Plasma Phys.

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Recently, pulsed power technologies, including pulsed electric fields (PEFs) and time-modulated plasmas, are starting to be applied actively in agriculture and food processing. In the applications, compact pulsed power generators with moderate peak power and repetitive operation are developed for controlling discharge plasmas and electric field distribution. These applications are mainly based on the biological effects of a spatially distributed electric field and the chemically active species in the plasma. The PEFs are caused by applying pulse voltage between the electrodes and contribute to form pores on the cell membrane or to change conformation of protein. When the applied voltage exceeds the discharge onset criterion, plasmas are generated through the avalanche process of electron accelerated with intense electric field in a gas or liquids medium. The plasmas produce chemically active species, UV radiation, an intense electric field in the vicinity of discharge channel and shock waves, which also have different biological effects. The agricultural applications of pulsed power can be categorized as two phases: pre-harvest and post-harvest phases. The pre-harvest phase consists of seed germination, seedling growth, plant growth and growth mode change from vegetative to reproductive. Pulsed power technologies are used to promotion of seed germination, plant growth enhancement through direct stimulation or indirect effect such as inactivation of bacteria in soil and liquid hydroponic media, and promotion of mushroom fruit body formation. The post-harvest phase consists of harvesting the agricultural produce, storing the products, transporting the products to consumers and food processing such as drying, pasteurization (sterilization of bacteria), permeabilization and fermentation. The pulsed power technologies are also used to keep freshness of agricultural produce through decontaminating airborne, inactivating bacteria and decomposition of plant hormone in the storage containers. The poration of cell membrane by PEF contributes improvement of extraction of juice, nutritional agents, and antioxidant metabolites such as polyphenols from agricultural products. In this review, at first, a basis of pulsed power system for agricultural applications and bio-effect by high-electric field exposure is outlined. After that, pre-harvest and post-harvest agricultural applications are described. The utilization of pulsed power technologies to contribute efficient food processing and improve food safety and quality is also described.

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Early Growth Effects of Nanosecond Pulsed Electric Field (nsPEFs) Exposure on Haloxylon ammodendron

Cited by 25 publications

References 48 publications

Raising the avermectins production in Streptomyces avermitilis by utilizing nanosecond pulsed electric fields (nsPEFs)

Raising the avermectins production in Streptomyces avermitilis by utilizing nanosecond pulsed electric fields (nsPEFs)

The Use of Physical Factors for Seed Quality Improvement of Horticultural Plants

Pulsed power applications for agriculture and food processing

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