Air Ion Effects on the Oxygen Consumption of Barley Seedlings

Kotaka, S.; Krueger, A. P.; Andriese, Paul C.; Nishizawa, Kazutoshi; Ohuchi, Takeshi; Takenobu, M.; Kozure, Yasuo

doi:10.1038/2081112a0

Cited by 25 publications

(11 citation statements)

References 7 publications

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“…In this study, air anion treatments led to extensive root growth and an elevated transpiration rate, which could have enhanced nutrient uptake from roots. In addition, on the basis of a previous finding that air anions promoted respiration (Kotaka et al, 1965), ATP generated through root respiration might stimulate the active transport of minerals from soil (Veen, 1981). Krueger et al (1964) reported that the increased Fe absorption was observed in barley seedlings treated with air anions.…”

Section: Xwulhqw 8swdnhmentioning

confidence: 95%

“…5D). The changes in stomatal con- Previous studies have shown that air anions stimulate plant respiration (Kotaka et al, 1965;Sidaway and Asprey, 1968). In addition, our previous study demonstrated that air anions improved the photosynthetic rate and subsequent lettuce growth (Song et al, 2014).…”

Section: *Dv ([Fkdqjh Lq Doh /Hdyhvmentioning

confidence: 98%

“…The improvement to plant respiration and growth was a major phenomenon as a result of air anion application in several plants (Kotaka et al, 1965;Krueger et al, 1962aKrueger et al, , 1962b. However, the growth promoting mechanism of air anions remains unclear, and the effect of air anion concentrations has not been determined.…”

Section: Introductionmentioning

confidence: 99%

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Air anions improve growth and mineral content of kale in plant factories

Lee

Kang

Han

et al. 2015

Hortic. Environ. Biotechnol.

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Air anions affect plant growth by stimulating various biological mechanisms. We investigated the effect of atmospheric anion concentrations on plant growth and mineral concentration in kale (Brassica oleracea var. acephala cv. TBC) plants cultivated in a plant factory. Kale seedlings grown under normal growth conditions for two weeks were transplanted to a nutrient film technique (NFT) system in a plant factory equipped with light-emitting diodes (LEDs) [red:white:blue (RWB) = 8:1:1 and red:green:blue (RGB) = 8:1:1, 181 ± 4.0 µmol·m -2 ·s -1, 12 h photoperiod]. Three concentrations of air anions (low, 2.9 × 10 5 ions·cm -3 ; medium, 5.4 × 10 5 ions·cm -3 ; and high, 7.8 × 10 5 ions·cm -3 ) were applied to the kale seedlings for four weeks using high voltage air anion generators. The medium and high levels of air anions increased shoot fresh weight to approximately 1.5-fold compared to the control after four weeks. Medium and high-level air anion treatments led to significantly higher leaf area than the control. The medium level of air anions improved the photosynthetic rate at four weeks of treatment although there was no significant difference between air anion treatments and the control. In addition, transpiration rate and stomatal conductance were significantly increased in the low and medium levels of air anion treatments, which likely supported biomass accumulation. Air anions also increased mineral uptake. The content of macroelements (P, K, Ca, Mg, and S) was at least 1.5-fold higher for plants exposed to RGB LEDs and 1.3-fold higher under RWB LEDs exposure. Microelements (Fe, Mn, and Zn) were increased at least 1.6-and 1.3-fold in kale shoots treated with air anions under RGB and RWB LEDs, respectively. In conclusion, air anions had a positive effect on kale growth and air anion generators could be used as a new technology for enhancing plant growth in plant factories and greenhouses.

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Section: Xwulhqw 8swdnhmentioning

confidence: 95%

Section: *Dv ([Fkdqjh Lq Doh /Hdyhvmentioning

confidence: 98%

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Air anions improve growth and mineral content of kale in plant factories

Lee

Kang

Han

et al. 2015

Hortic. Environ. Biotechnol.

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“…Air ions of both signs stimulated growth and the rate of oxygen consumption was markedly increased [52]. Worden [53] showed that negative air ions increased the growth rate of mouse fibroblasts.…”

Section: Activated Oxygenmentioning

confidence: 99%

A Unifying Concept of Carcinogenesis and its Therapeutic Implications

Smith

Kenyon²

1973

Oncology

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The Warburg theory of carcinogenesis is reexamined in the light of recent information, and objections are discussed. We conclude that these objections are not valid in view of the present data. Intercellular communication in normal cells and its lack in tumors is discussed. A model of carcinogenesis in which cell oscillations are related to intercellular communication is shown to have support. Several different pathways to cancer are shown ro result. Therapeutic implications, including activated oxygen by means of negative ions and electromagnetic excitation as therapy, are suggested. A possible role of antioxidant vitamins in retarding cancer is considered. A unified outlook of several levels of carcinogenesis is now possible and lines of further research are suggested.

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“…During the past 8 years the authors have investigated the effect of gaseous ions on higher plants and have found that moderate concentrations of positive and negative ions markedly stimulate plant growth and increase oxygen consumption (2,3,6,7). They increase both the rates of shrinking and swelling of isolated chloroplasts and the utilization of ATP in the process (4).…”

mentioning

confidence: 99%

Some Observations on the Bleaching Effect of Ethylenediaminetetraacetic Acid on Green Barley Leaves

Kotaka

Krueger

1969

Plant Physiol.

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Abstract. Green barley leaves (Hordeum vulgaris) floated on the surface of 0.05 Mi ethylenediamine disodium tetraacetate, EDTA-ZNa, pH 7.0 and exposed to light (5000 lux) at 250 exhibited a marked bleaching (EDTA-bleaching) visible to the naked eye and paralleled by a striking reduction in content of chlorophylls a and b. This loss of color did not occur in controls which were treated with H,O instead of EDTA (water controls). In darkness the leaves in the water controls were bleached while EDTA-treated leaves retained all their color.EDTA bleaching was observed only in intact leaves. When leaves were boiled EDTA protected their pigment against photodecomposition. Without EDTA boiled leaves were bleached completely in light.When intact green leaves which had been floated on water and exposed to light for 48 hr were treated with boiling ethanol or acetone, the chlorophylls extracted by this procedure did not undergo bleaching if EDTA were present in solution. Under these conditions a green fine grain precipitate formed which was insoluble in ethanol or acetone and was stable in light or darkness.EDTA bleaching of green barley leaveE was inhibited by KCN, and by the addition of casein hydrolysate.During the past 8 years the authors have investigated the effect of gaseous ions on higher plants and have found that moderate concentrations of positive and negative ions markedly stimulate plant growth and increase oxygen consumption (2, 3, 6, 7). They increase both the rates of shrinking and swelling of isolated chloroplasts and the utilization of ATP in the process (4). They enhance iron uptake and in plants suffering from iron chlorosis increase the "residual" iron pool (including cytochromes and other Fe-containing enzymes) while the "active" iron fraction of the tissues decreases and the chlorophvll content is diminished (2, /7). Active iron, contained in the chloroplasts, participates in the production of chlorophyll while residual iron is not associated with chloroplasts nor is it involved in the biosynthesis of chlorophyll (1, 8).In studying the effect of air ions on chlorophyll biosynthesis attempts have been made to use etiolated seedlings for the preparation of isolated chloroplast suspensions which had retained their ability to produce chlorophyll. Unfortunately such isolates bleach when exposed to light; even green chloroplasts become decolorized during light treatment for 72 hr. In our experience retention of the green color of chloroplasts is closelv linked to their retention of catalytic activitv. Therefore it seemed reasonable that if one knew how to prevent the bleaching of chloroplasts, he might hope to obtain etiolated chloroplast suspensions capable of synthesizing chlorophyll in the light. These considerations led us to study the mechanism of decolorization of isolated green chloroplasts in a defined medium.In preliminary experiments it was noted that EDTA, a component of the isolation and suspension medium, was responsible for the decolorization of green chloroplasts. It appeared to us that an ...

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Air Ion Effects on the Oxygen Consumption of Barley Seedlings

Cited by 25 publications

References 7 publications

Air anions improve growth and mineral content of kale in plant factories

Air anions improve growth and mineral content of kale in plant factories

A Unifying Concept of Carcinogenesis and its Therapeutic Implications

Some Observations on the Bleaching Effect of Ethylenediaminetetraacetic Acid on Green Barley Leaves

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