Ultrafine bubbles alleviated osmotic stress in soybean seedlings

Iijima, Morio; Yamashita, Kaito; Hirooka, Yoshihiro; Ueda, Yoshikatsu; Yamane, Koji; Kamimura, Chikashi

doi:10.1080/1343943x.2021.2021094

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…It regulated heme oxygenase-1/carbon monoxide pathways and increased root development [ 13 ]. Some researchers have suggested that hydrogen has antioxidant properties, which can help to reduce oxidative stress in plants, improve nutrient uptake by plants, and improve overall plant growth and development [ 6 , 8 , 10 , 13 , 22 ]. Hydrogen molecules are not easy to apply.…”

Section: Discussionmentioning

confidence: 99%

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Safe Farming: Ultrafine Bubble Water Reduces Insect Infestation and Improves Melon Yield and Quality

Hung,

Li,

Peng

et al. 2024

Plants

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Melon pest management relies on the excessive application of pesticides. Reducing pesticide spraying has become a global issue for environmental sustainability and human health. Therefore, developing a new cropping system that is sustainable and eco-friendly is important. This study found that melon seedlings irrigated with ultrafine water containing H2 and O2 (UFW) produced more root hairs, increased shoot height, and produced more flowers than the control irrigated with reverse osmosis (RO) water. Surprisingly, we also discovered that UFW irrigation significantly reduced aphid infestation in melons. Based on cryo-scanning electron microscope (cryo-SEM) observations, UFW treatment enhanced trichome development and prevented aphid infestation. To investigate whether it was H2 or O2 that helped to deter insect infestation, we prepared UF water enrichment of H2 (UF+H2) and O2 (UF+O2) separately and irrigated melons. Cryo-SEM results indicated that both UF+H2 and UF+O2 can increase the density of trichomes in melon leaves and petioles. RT-qPCR showed that UF+H2 significantly increased the gene expression level of the trichome-related gene GLABRA2 (GL2). We planted melons in a plastic greenhouse and irrigated them with ultrafine water enrichment of hydrogen (UF+H2) and oxygen (UF+O2). The SPAD value, photosynthetic parameters, root weight, fruit weight, and fruit sweetness were all better than the control without ultrafine water irrigation. UFW significantly increased trichome development, enhanced insect resistance, and improved fruit traits. This system thus provides useful water management for pest control and sustainable agricultural production.

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Section: Discussionmentioning

confidence: 99%

“…Hydrogen pretreatment can improve the salt stress resistance of rice and Arabidopsis [ 20 ]. It has been reported that molecular hydrogen (H 2 ) has antioxidant activity, removing reactive oxygen species (ROS) and reactive nitrogen species (RNS) and reducing free radical toxicity [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Safe Farming: Ultrafine Bubble Water Reduces Insect Infestation and Improves Melon Yield and Quality

Hung,

Li,

Peng

et al. 2024

Plants

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“…In experiments, UFB promoted high growth under oligotrophic conditions in hydroponic soybean cultivation. UFB also exhibited the same effect on growth when polyethylene glycol was added as desiccation stress (Iijima et al 2022b). Thus, we infer that UFB promote plant growth under environmental stress.…”

Section: Graphical Abstract Introductionmentioning

confidence: 90%

Fine soil particle aggregation in ultra-fine bubble irrigated paddy fields

et al. 2022

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The flotation method of ultra-fine bubbles (UFB) aims to address pollution and has been used for combating the undesirable reducibility of paddy soils. Hence, water containing UFB is gaining increasing attention for potential agricultural applications. Although certain hypotheses have been proposed, such as the collection of ions in water through the electrical characteristic of UFB, no clear experimental data have been provided. We found that improvement in turbidity may cause the adsorption of fine soil particles in the water by the UFB, thereby improving the quality of the water. The data from the paddy field showed that a decrease in turbidity (below 2 nephelometric turbidity units) occurred over a short period of time (3 days). UFB concentration is directly related to turbidity with a coefficient of determination of 0.93. This phenomenon was also observed through the distribution of bubbles and soil particles, where the average particle size increased because of the aggregation of soil particles and the decrease in turbidity in the paddy field, indicating that UFB collect soil particles and thereby improve water quality. Therefore, UFB are highly effective in cleaning rice field water and will be a preferred method for purifying the environment in the future.

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