Nickel: A Micronutrient Essential for Higher Plants

Brown, Patrick H.; Welch, Ross M.; Cary, E. E.

doi:10.1104/pp.85.3.801

Cited by 448 publications

(264 citation statements)

References 12 publications

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“…In plants, Ni is a component of the enzyme urease and is considered an essential micronutrient for growth (Brown et al 1987). However, excess Ni is known to be toxic and many studies have been conducted concerning Ni toxicity of various species (see reviews by Mishra and Kar (1974) and Seregin and Kozhevnikova (2006)).…”

Section: Introductionmentioning

confidence: 99%

Toxic effects of Ni2+ on growth of cowpea (Vigna unguiculata)

2007

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Despite the importance of Ni-polluted soils throughout the world, comparatively little is known about the activity of Ni 2+ required to reduce plant growth and the effects that Ni 2+ toxicity has on the plant. Cowpea (Vigna unguiculata (L.) Walp. cv Caloona) was grown in dilute nutrient solutions to investigate the effect of Ni 2+ activity on shoot and root growth. A Ni 2+ activity of 1.4 μM was found to cause a 10 % reduction in the relative fresh mass of the root and shoots. The primary site of Ni 2+ toxicity was the shoots, with the younger leaves displaying an interveinal chlorosis (possibly a Niinduced Fe deficiency) at Ni 2+ activities ≥ 1.7 μM. Lateral root formation was inhibited in the two highest Ni 2+ treatments (3.3 and 5.1 μM), and the roots growing at the highest Ni 2+ activity were short and stubby and brown in color. However, no other symptoms of toxicity were observed on the roots at lower Ni 2+ activities.Kopittke, P.M., C

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Section: Introductionmentioning

confidence: 99%

Toxic effects of Ni2+ on growth of cowpea (Vigna unguiculata)

2007

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“…The Ni-metalloenzyme urease catalyzes the initial step of the urea hydrolysis to CO 2 and NH 3 (Mulrooney & Hausinger, 2003). Therefore, higher urease activity mediated by Ni (Eskew et al, 1984;Brown et al, 1987;Marschner, 2008) helps to prevent urea accumulation in the plant. Gerendás & Sattelmacher (1997a,b) verified the need for Ni for urease activation, for plant growth on urea-based media and for recycling endogenous urea.…”

Section: Introductionmentioning

confidence: 99%

“…In 1975, Dixon et al (1975) found that Ni is a component of urease, a ubiquitous metalloenzyme present in plants, and later on, based on works by Eskew et al (1983Eskew et al ( , 1984 and Brown et al (1987), Ni was classified as a micronutrient (Salisbury & Ross, 1992;Marschner, 2008). However, research with Ni has mainly addressed its toxic effects on plants and on how Ni-hyperaccumulator plants respond to high Ni concentrations.…”

Section: Introductionmentioning

confidence: 99%

Effects of nickel and nitrogen soil fertilization on lettuce growth and urease activity

Oliveira¹,

Fontes²,

Rezende³

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYNickel is a micronutrient involved in nitrogen metabolism and a constituent of the urease molecule. Plant growth and urease activity were evaluated in lettuce (Lactuca sativa L.) grown in soil-filled pots in a 2 x 8 factorial design with two nitrogen (N) sources and eight Ni rates, with five replications. Nitrogen was applied at 200 mg dm -3 (half the dose incorporated into the soil at seedling transplanting and half top-dressed later) using the sources NH 4 NO 3 (AN) and CO(NH 2 ) 2 (Ur). The Ni treatments (0, 2, 4, 8, 12, 16, 24 and 32 mg dm -3 ) were applied as NiCl 2 . The shoot dry-matter yield, leaf urease activity, Ni levels in the lettuce leaves and Ni levels extracted from soil with Mehlich-3 (M-3) and DTPA were determined. In the plants supplied with AN , the shoot dry-matter yield was higher than in those supplied with Ur. There was no difference in shoot dry matter in response to soil-applied Ni. The leaf urease activity increased with Ni application, regardless of the N source. The extractions with M-3 and DTPA were efficient to evaluate Ni availability for lettuce in the Red-Yellow Latosol. Ni (0, 2, 4, 8, 12, 16, 24

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“…In plants nickel is a component of the enzyme urease and is considered as an essential micronutrient for growth (Brown et al, 1987). However, excess nickel is known to be toxic and many studies have been conducted concerning nickel toxicity of various species (Mishra and Kar, 1974;Seregin and Kozhevnikova, 2006).…”

Section: Effect Of Nickel On Growth Rate and Biomassmentioning

confidence: 99%