Generation of hydroxyl radicals by Fe-polyphenol-activated CaO2 as a potential treatment for soil-borne diseases

Morikawa, Cláudio Kendi

doi:10.1038/s41598-018-28078-6

Cited by 7 publications

(4 citation statements)

References 60 publications

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“…However, CaO 2 has been reported to have inhibitory effects on bacteria in shaken cultures by generating free radicals and on plant growth depending on soil type, sowing depth, and plant types, such as rice carrying anoxia tolerance genes (Biswas et al., 2001; Sladdin & Lynch, 1983; Yamauchi & Chuong, 1995). In addition, in the presence of a ferrous iron bond with polyphenol, CaO 2 exhibited a strong bactericidal effect through the Fenton reaction generating radicals (Morikawa, 2018). The mechanisms in these reports may be related to the inhibition of initial growth by the double coating of seeds with CALPER on BF in our study (Figure 2a).…”

Section: Discussionmentioning

confidence: 99%

Seed coating by biofertilizer containing spores of Bacillus pumilus TUAT1 strain enhanced initial growth of Oryza sativa L.

Agake

Ramírez

Kojima³

et al. 2021

Agronomy Journal

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In rice production, early growth is often slow in direct‐seeded system. Techniques to overcome this barrier are needed. This study evaluated the effectiveness of Kikuichi—a biofertilizer containing Bacillus pumilus TUAT1 spore—in promoting rice growth in a direct‐sowing system. Oxygen, iron, and molybdenum as coating materials were also evaluated to combine with biofertilizer. The seeds were coated with powdered Kikuichi with polyvinyl alcohol followed by a coating with calcium peroxide (CALPER), molybdenum (Benmoly), and iron powder. Double coating with the biofertilizer and Benmoly promoted plant growth. We applied amounts of Kikuichi equivalent to one, two and a half, and five times the weight of the seeds and found that the growth‐promoting effect was dependent on the amount applied. The best timing of application of the coating, specifically during sprouting, was before the coleoptile emerged. Bacillus pumilus TUAT1 can enhance the growth of rice when it exists in high concentration on the spermosphere by coating with molybdenum, but double coating with neither calcium peroxide nor iron powder contributed to the initial growth of the seeds. Kikuichi coating with Benmoly has positive effects on the rice growth. This coating method is suitable to apply biofertilizer for direct sowing cultivation of rice.

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Section: Discussionmentioning

confidence: 99%

Seed coating by biofertilizer containing spores of Bacillus pumilus TUAT1 strain enhanced initial growth of Oryza sativa L.

Agake

Ramírez

Kojima³

et al. 2021

Agronomy Journal

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“…However, contact with Bacillus subtilis had no effect on the amount of •OH produced. In the Fe-polyphenol catalyst made from coffee grounds, Morikawa (2018) isolated polyphenols from coffee, including caffeic acid and chlorogenic acid, which are crucial in the production of hydroxyl radicals. Application of H 2 O 2 along with caffeic acid and chlorogenic acid in soil was found to minimize Ralstonia solanacearum –caused soil-borne illness in tomato cv.…”

Section: Reactive Oxygen Species Functioning Under Pathogenic Stressmentioning

confidence: 99%

ROS generated from biotic stress: Effects on plants and alleviation by endophytic microbes

Sahu

Jayalakshmi²,

Tilgam³

et al. 2022

Front. Plant Sci.

109

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Aerobic living is thought to generate reactive oxygen species (ROS), which are an inevitable chemical component. They are produced exclusively in cellular compartments in aerobic metabolism involving significant energy transfer and are regarded as by-products. ROS have a significant role in plant response to pathogenic stress, but the pattern varies between necrotrophs and biotrophs. A fine-tuned systemic induction system is involved in ROS-mediated disease development in plants. In regulated concentrations, ROS act as a signaling molecule and activate different pathways to suppress the pathogens. However, an excess of these ROS is deleterious to the plant system. Along with altering cell structure, ROS cause a variety of physiological reactions in plants that lower plant yield. ROS also degrade proteins, enzymes, nucleic acids, and other substances. Plants have their own mechanisms to overcome excess ROS and maintain homeostasis. Microbes, especially endophytes, have been reported to maintain ROS homeostasis in both biotic and abiotic stresses by multiple mechanisms. Endophytes themselves produce antioxidant compounds and also induce host plant machinery to supplement ROS scavenging. The structured reviews on how endophytes play a role in ROS homeostasis under biotic stress were very meager, so an attempt was made to compile the recent developments in ROS homeostasis using endophytes. This review deals with ROS production, mechanisms involved in ROS signaling, host plant mechanisms in alleviating oxidative stress, and the roles of endophytes in maintaining ROS homeostasis under biotic stress.

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“…g. antibiotics, bacteriocins, lytic enzymes) and/or antagonistic microorganisms that produce antibiotic agents and cause competitive protection on infection sites. − The latters include probenazole (PBZ), , benzothidiazole (BTH), , β-aminobutyric acid (BABA), , and salicylic acid analogues, which are able to induce the systemic acquired resistance (SAR), an innate immunity for broad disease defense response; some of the activators have been used practically . The group also involves immunity elicitors derived from microorganisms based on the concept of pathogen associated molecular patterns (PAMPs). , In addition to the defense activators, evidence has shown that certain iron compounds were effective for disease preventions − and that Fe-specific manners such as fenton reaction and iron availability were involved in disease suppressions. − Notably, the previous work showed that biogenous iron oxides (BIOXs) were applicable for disease control agents; the foliar application of BIOX materials induced the transcriptional activation of defense-related genes and significantly suppressed various plant diseases including anthracnose of Japanese mustard spinach cause by Colletotrichum destructivum and crucifer gray mold caused by Botrytis cinerea through preventing the elongation of invading hyphas…”

Section: Introductionmentioning

confidence: 99%

Suppression of Bacterial Plant Diseases by Soil Admixture with Biogenous Iron Oxide Precipitates

Tamura

Takada

2021

ACS Agric. Sci. Technol.

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Aquatic iron oxidizing bacterium Leptothrix ochracea abundantly produces biogenous microtubular iron oxide (BIOX) precipitates consisting mainly of amorphous ferric oxyhydroxide nanoparticles with low contents of silicon and phosphorus. The BIOXs are generally known as facile, environmentally benign, and multifunctional materials for various industrial fields. Here, we report the beneficial effects of BIOX-incorporated soil admixtures on the prevention of bacterial plant diseases using several plant–pathogen combinations. When tomato seedlings were grown on a BIOX (2% w/w) admixture with cultivation soils for at least 1 week, symptom developments of bacterial wilt were effectively suppressed after 2 weeks of challenge inoculation; however, the disease preventions were abrogated in the case of using heat (800 °C, 2 h)-treated BIOX samples, suggesting that the amorphous state is crucial to fulfilling the disease suppressive effects. In addition, similar disease suppressions were observed in black rot and bacterial leaf spot on Chinese cabbage plants cultivated on the BIOX–soil admixture. Gene expression analyses revealed that transcript levels of various defense-related genes including AtPR1a and AtPAL1 were elevated in Arabidopsis plants after 7 days of transplanting onto BIOX–soil admixtures. Disease severity experiments using various Arabidopsis mutant and transgenic lines with a bacterial speck pathogen suggested that the salicylic-acid-dependent defense pathway is attributed predominantly to the disease suppressive effects plausibly through the systemic acquired resistance induced by interacting host plant roots with BIOX sheaths. Micromorphology analysis showed a high compatibility between the root surfaces and amorphous BIOX sheath body. The results therefore demonstrate that the BIOX precipitates can serve as an eco-friendly agricultural material for disease control via admixing to cultivation soils.

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Generation of hydroxyl radicals by Fe-polyphenol-activated CaO2 as a potential treatment for soil-borne diseases

Cited by 7 publications

References 60 publications

Seed coating by biofertilizer containing spores of Bacillus pumilus TUAT1 strain enhanced initial growth of Oryza sativa L.

Seed coating by biofertilizer containing spores of Bacillus pumilus TUAT1 strain enhanced initial growth of Oryza sativa L.

ROS generated from biotic stress: Effects on plants and alleviation by endophytic microbes

Suppression of Bacterial Plant Diseases by Soil Admixture with Biogenous Iron Oxide Precipitates

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