2018
DOI: 10.1111/ppa.12871
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Abstract: Nickel (Ni) is a cofactor for urease, an enzyme that breaks down urea into ammonia and carbon dioxide. This study aimed to evaluate the physiological impact of Ni on urea, antioxidant metabolism and powdery mildew severity in soybean plants. Seven levels of Ni (0, 10, 20, 40, 60, 80 and 100 g ha À1) alone or combined with the fungicides fluxapyroxad and pyraclostrobin were applied to soybean plants. The total Ni concentration ranged from 3.8 to 38.0 mg kg À1 in leaves and 3.0 to 18.0 mg kg À1 in seeds. A stron… Show more

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Cited by 35 publications
(21 citation statements)
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References 33 publications
(51 reference statements)
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“…In their work, plants presented reduced growth and large amounts of accumulated urea due to the reduction of urease activity. Similar results were obtained previously by Walker et al (1985), Krogmeier et al (1991) and more recently by Moraes et al (2009), Barcelos et al (2018), and Freitas et al (2018). Therefore, the addition of Ni in solutions of urea for spraying or fertigation could also increase the N fertilizer use efficiency and maximize the profits of farmers.…”
Section: Introductionsupporting
confidence: 93%
See 1 more Smart Citation
“…In their work, plants presented reduced growth and large amounts of accumulated urea due to the reduction of urease activity. Similar results were obtained previously by Walker et al (1985), Krogmeier et al (1991) and more recently by Moraes et al (2009), Barcelos et al (2018), and Freitas et al (2018). Therefore, the addition of Ni in solutions of urea for spraying or fertigation could also increase the N fertilizer use efficiency and maximize the profits of farmers.…”
Section: Introductionsupporting
confidence: 93%
“…After urease action, N is quickly metabolized and incorporated into amino acids and amides. The urease foliar activity is very important when N comes from foliar applications, and although this enzyme helps in the efficient N assimilation, ammonia toxicity can occur when its activity is too high (BARCELOS et al, 2018;BARCELOS et al, 2017;BOER et al, 2014;POLACCO et al, 2013).…”
Section: Introductionmentioning
confidence: 99%
“…The dose used in the present study was based on our preliminary experiments (authors' unpublished data) and on data provided by Barcelos et al . (2018). At 3 days after Ni treatment, plants were inoculated with a suspension of 10 5 urediniospores of P .…”
Section: Methodsmentioning
confidence: 99%
“…oxysporum f. sp. lycopersici (Ahmed et al , 2016), pecan– Fusicladium effusum (Wood et al , 2012), day lily– Puccinia hemerocallidis (Wood and Reilly, 2007), and soybean– Microsphaera diffusa (Barcelos et al , 2018), are also negatively affected by Ni.…”
Section: Introductionmentioning
confidence: 99%
“…These studies also support the high accumulation possibility of Ni in industrial zones. Actually Ni is a component of the urease enzyme responsible for the hydrolysis of urea nitrogen (Gerendás et al, 1999;Barcelos et al, 2018). A large part of the nickel nutrient taken from the Ni element is excreted with feces without being absorbed by intestines, some of them accumulate in tissues such as the lung, intestine and skin, and nickel has been reported to have carcinogenic effects especially in children (Qing et al, 2015;Vural, 1993).…”
Section: Resultsmentioning
confidence: 99%