Effect of Zinc on the Development of Brown Spot in Rice

Moreira, Wiler Ribas; Rodrigues, Fabrício Ávila; Duarte, Henrique da Silva Silveira

doi:10.1111/jph.12125

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…Similar results were reported by Elamawi et al, (2016) on rice brown spot disease. In contrast to this investigation, Moreira et al, (2013) found that increasing Zn in leaf tissues was Egypt. J.…”

Section: Discussioncontrasting

confidence: 86%

Estimate of the Antifungal Activity and Phytotoxicity of ZnO Nanoparticles on Magnaporthe oryzae and Rice Cultivar Sakha 101 using Morphological, Biochemical and Molecular Markers

Elamawi

Youssef

El–Refaee³

2019

Egyptian Journal of Phytopathology

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ice blast caused by Magnaporthe oryzae is the major biotic stress influences rice yield. The current investigation aimed to estimate the antifungal activity and phytotoxicity effect of different concentrations of ZnO nanoparticles (0.0, 10, 25, 50, 100 and 200 mg/L) on M. oryzae and rice cultivar Sakha101 using morphological, biochemical and molecular markers. Five ISSR markers and seven RAPD primers were utilized to estimate the potentiality effects of ZnO nanoparticles (NPs). The effect of different rates and applications of ZnO NPs used to control rice blast disease and improve grain yield were estimated in the field during 2017 and 2018 growing seasons. The results showed that, in vitro antifungal assay of ZnO NPs showed a significant decrease in colony formation in comparison to control. Foliar application of ZnO NPs at 25 mg/L was the most effective treatments for mitigation rice blast at five days before inoculation. While under field conditions, foliar spray with 25 mg/L at nursery increased the grain yield to 4.366 ton/fed in season 2017 and to 4.625 ton/fed in 2018. Foliar spray with ZnO NPs of rice offer a practical and useful approach to improve rice grain yield and reduce leaf blast disease when applied at optimal concentrations. ZnO NPs at lower concentrations (10 and 25 mg/L) enhanced seed germination and improved seedling growth, while the higher concentrations (100 and 200 mg/L) resulted in phytotoxicity. ZnO NPs treatments altered the expression patterns of seeds storage protein; induced newly synthesized isoforms and disappearance of existing ones. The obtained results using molecular markers confirmed that the lower concentrations of ZnO-NPs (10 and 25 mg/L) are considered as a good enhancement agent, as in case of rice cultivar Sakha101, using UBC 825 primer with 306 bp at concentration of 25 mg/L and OPA-9 primer with 948 bp at concentration of 10 mg/L.

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Section: Discussioncontrasting

confidence: 86%

Estimate of the Antifungal Activity and Phytotoxicity of ZnO Nanoparticles on Magnaporthe oryzae and Rice Cultivar Sakha 101 using Morphological, Biochemical and Molecular Markers

Elamawi

Youssef

El–Refaee³

2019

Egyptian Journal of Phytopathology

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“…Contrary results were observed by Lin and Xing 2008 which, phytotoxicity of commercially available ZnO nanoparticle to rye grass was reported. Moreira et al 2013 showed that high foliar concentration of Zn was associated with high concentrations of Zn in leaf tissues consequently increasing rice susceptibility to brown spot (Moreira et al 2013). According to Duffy (2007), the intensity of several diseases can be reduced or increased by supplying Zn to plants.…”

Section: Resultsmentioning

confidence: 99%

Effect of Zinc Oxide Nanoparticles on Brown Spot Disease and Rice Productivity Under Saline Soil

Elamawi

Bassiouni

Elkhoby

et al. 2016

Journal of Plant Protection and Pathology

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The present study investigates the effect of zinc oxide nanoparticles (ZnO-NPs) on rice plants growth and their role in management of brown spot disease caused by the causal agent Helmenthosporium oryza. The antifungal activity of ZnO-NPs (20 to 35 nm particle size) was evaluated at different concentrations. Spores germination percentage, colony formation and sporulation of H. oryza were reduced at concentrations 25 and 50 ppm, in vitro. The greenhouse results showed that seed soaking treatment and foliar spray 5 day before inoculation (DBI) of ZnO-NPs leaded to reduce infection percentage of brown spot without significant difference between ZnO-NPs concentrations. Foliar spray ٢ days post-inoculation (DPI) with the lower concentrations 10 and 25 ppm of ZnO-NPs were able to reduce infection percentage of brown spot. Under field conditions, During 2013 and 2014 seasons at El-sirw Agriculture Research Station, Dammietta, Egypt, rice varieties Giza 177, Giza 178 and Giza 179 under ZnO-NPs level (0, 10, 20 and 30 ppm) as foliar spray twice at mid tillering and panicle initiation stages were evaluated. Application of ZnO-NPs at level 20 ppm effectively reduced brown spot disease severity and discolored grains of all tested varieties. The studied rice varieties were varied in their growth, yield attributes, grain yield and brown spot severity whereas Giza 178 and Giza 179 had good performance under ZnO-NPs treatments. Therefore both Giza 178 and Giza 179 had showed significant salt tolerance at 20 ppm of ZnO-NPs. The performance of Giza 177 as a salinity-sensitive variety was improved at 20 ppm ZnO-NPs. The all ZnO-NPs treatment positively improved rice growth, yield attributes, rice grain yield and brown spot severity over control treatment. Finally, ZnO-NPs can be used as future "nanofertilizers".

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“…Supply of Zn can lead to increase or decrease in disease severity in plants (Duffy, 2007). Moreira et al (2013) observed a positive correlation between the elevated Zn concentration in leaves and its susceptibility to brown spot in rice. Though these effects of elevated levels of Zn were found selective.…”

Section: Environment Conservation Journalmentioning

confidence: 86%

Agronomic practices for sustainable diseases management in rice: A review

Jehangir

Ahangar

Hassan

et al. 2022

ECJ

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Rice is globally the most important food crop and there is a dire need to feed the ever-increasing population by improving its productivity. It has been realised that diseases are the major impediment towards enhancing the productivity of this crop. Despite the advent of modern effective disease control measures such as use of chemicals, bioagents and resistant varieties; agronomic practices still play a vital role in disease management in rice. Optimum use of different agro-techniques can be exploited for efficient control of various devastating diseases like rice blast, sheath blight, bakanae and many more by providing a favourable environment to better crop survival. Besides, appropriate selection of a variety, use of quality seed, method of establishment, planting time, nutrient, water and weed management practices can be well exploited to control various diseases. This manuscript entails to review the work pertaining to use of agronomic practices for exploiting the potential of crop environment interaction through reduced disease infection and to bridge the yield gap for ensuring sustained food security.

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Effect of Zinc on the Development of Brown Spot in Rice

Cited by 5 publications

References 7 publications

Estimate of the Antifungal Activity and Phytotoxicity of ZnO Nanoparticles on Magnaporthe oryzae and Rice Cultivar Sakha 101 using Morphological, Biochemical and Molecular Markers

Estimate of the Antifungal Activity and Phytotoxicity of ZnO Nanoparticles on Magnaporthe oryzae and Rice Cultivar Sakha 101 using Morphological, Biochemical and Molecular Markers

Effect of Zinc Oxide Nanoparticles on Brown Spot Disease and Rice Productivity Under Saline Soil

Agronomic practices for sustainable diseases management in rice: A review

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