Abstract:We have produced plasma activated water (PAW) using air, O2, N2, He and Ar atmospheric pressure dielectric barrier discharge plasma irradiation to deionized water. Then, PAW was kept for 1 hour or 1 day at room temperature to reduce concentrations of short lifetime reactive oxygen species and reactive nitrogen species before supplying to plants. O2, air and N2PAW induces growth enhancement of plants. For 1 hour PAW supply the longest seedling length after 3 days cultivation is 1.62, 1.38, 1.13, 1.12, and 1.04 … Show more
“…Previous publication 33 reported that PAW-treated lentil seedlings exhibited 34% and 128% increase in the seedling length after the 3 rd and 6 th days of irrigation. Few reports also observed that the air PAW induced significant seedling growth compared to O 2 , N 2 , and He PAW 35 .Figure 3Effect of PAW treatment at different time-intervals on ( a ) physiological status of tomato seedlings (28 days old) grown in vermiculite. ( b ) shoot and root length (cm) and ( c ) shoot: root length ratio.…”
Plants are very vulnerable to pathogen attacks and environmental stress as they are exposed to harsh environments in natural conditions. However, they have evolved a self-defense system whereby reactive oxygen and nitrogen species (RONS) act as double-edged swords by imposing (at higher concentration) and mitigating (at lower concentration) environmental stress. Cold plasma is emerging as a feasible option to produce a variety of RONS in a controlled manner when amalgamate with water. Cold plasma activated/treated water (PAW) contains a variety of RONS at concentrations, which may help to activate the plant’s defense system components. In the present study, we examine the effect of cold atmospheric-air jet plasma exposure (15 min, 30 min, and 60 min) on the water’s RONS level, as well as the impact of PAW irrigation, (assigned as 15PAW, 30PAW, and 60PAW) on tomato seedlings growth and defense response. We found that PAW irrigation (priming) upregulate seedlings growth, endogenous RONS, defense hormone (salicylic acid and jasmonic acid), and expression of key pathogenesis related (PR) gene. 30 min PAW contains RONS at concentrations which can induce non-toxic signaling. The present study suggests that PAW irrigation can be beneficial for agriculture as it modulates plant growth as well as immune response components.
“…Previous publication 33 reported that PAW-treated lentil seedlings exhibited 34% and 128% increase in the seedling length after the 3 rd and 6 th days of irrigation. Few reports also observed that the air PAW induced significant seedling growth compared to O 2 , N 2 , and He PAW 35 .Figure 3Effect of PAW treatment at different time-intervals on ( a ) physiological status of tomato seedlings (28 days old) grown in vermiculite. ( b ) shoot and root length (cm) and ( c ) shoot: root length ratio.…”
Plants are very vulnerable to pathogen attacks and environmental stress as they are exposed to harsh environments in natural conditions. However, they have evolved a self-defense system whereby reactive oxygen and nitrogen species (RONS) act as double-edged swords by imposing (at higher concentration) and mitigating (at lower concentration) environmental stress. Cold plasma is emerging as a feasible option to produce a variety of RONS in a controlled manner when amalgamate with water. Cold plasma activated/treated water (PAW) contains a variety of RONS at concentrations, which may help to activate the plant’s defense system components. In the present study, we examine the effect of cold atmospheric-air jet plasma exposure (15 min, 30 min, and 60 min) on the water’s RONS level, as well as the impact of PAW irrigation, (assigned as 15PAW, 30PAW, and 60PAW) on tomato seedlings growth and defense response. We found that PAW irrigation (priming) upregulate seedlings growth, endogenous RONS, defense hormone (salicylic acid and jasmonic acid), and expression of key pathogenesis related (PR) gene. 30 min PAW contains RONS at concentrations which can induce non-toxic signaling. The present study suggests that PAW irrigation can be beneficial for agriculture as it modulates plant growth as well as immune response components.
“…[15,[29][30][31] The indirect plasma treatment/activation of seeds and plants by the CP, that is, the effect of plasma activated gas or plasma activated water (PAW) is far less studied than the direct plasma effect even though it can also enhance seed germination and plant growth. The PAW can be generated by operating electric discharges directly in water [32,33] but more often in gas in a contact with water, [34] usually above the water surface, for example, gliding arc, [35][36][37] glow discharge, [38] dielectric barrier discharge, [39][40][41][42] or plasma jets. [43,44] Besides pure water also other liquid media, such as drainage water from pots, [32] nutrient solution, [33] or fertilizer [43] have been activated and used.…”
The paper presents the study on the effects of the plasma activated water (PAW) generated by transient spark discharge on the wheat (Triticum aestivum L.) cultivated in vitro and in vivo. Water uptake and germination of seeds, growth parameters of seedlings and plants, as well as the content of photosynthetic pigments, soluble proteins and activity of antioxidant enzymes are reported and correlated with the concentrations of reactive oxygen and nitrogen species in the PAW. The PAW improves germination, early development of the seedlings, the content of photosynthetic pigments in the leaves and soluble protein content in the roots, and suppresses the activity of antioxidant enzymes. The results indicate that the PAW may effectively stimulate growth of the wheat seedlings and positively affect their metabolism especially in the soil with low nutrient content.
“…Studies have recorded plant growth enhancement during plant cultivation with PAW. [32,33] Some studies noted that PAW contained significant levels of nitrogen-related species (NO x and NH x ). [11,34,35] A separate study highlighted that PAW exhibited a strong bactericidal effect due to the generation of strong and short-lived reactive oxygen species (ROS) such as hydroperoxyl radical (HOO·).…”
Section: Introductionmentioning
confidence: 99%
“…Plasma‐activated water (PAW), also referred to as plasma‐treated water (PTW), can be used as an effective hydroponic fertilizer. Studies have recorded plant growth enhancement during plant cultivation with PAW . Some studies noted that PAW contained significant levels of nitrogen‐related species (NO x and NH x ) .…”
This study assesses a potential use of the recently developed nonthermal atmospheric pressure plasma technology in hydroponic plant cultivation. Two types of plasma‐activated liquid solutions were compared, namely, l‐Phenylalanine (l‐Phe), which had a benzene ring structure, and l‐Alanine (l‐Ala), which did not have a benzene ring structure. Antimicrobial property and plant growth enhancement were simultaneously obtained when plasma‐activated l‐Phe was used. We found that the benzene ring structure in solution contributed to antimicrobial property. Further, colony forming unit assay indicated that 99% of Escherichia coli (E. coli) were eliminated after 24‐h incubation and radish sprout growth increased by about 40% after 2 days of cultivation.
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