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Science 11 November 1983:
Vol. 222. no. 4624, pp. 621 - 623
DOI: 10.1126/science.222.4624.621
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Articles

Nickel: An Essential Micronutrient for Legumes and Possibly All Higher Plants

DAVID L. ESKEW 1, ROSS M. WELCH 2, and EARLE E. CARY 2

1 Department of Agronomy, Cornell University, Ithaca, New York 14853
2 U.S. Department of Agriculture, Plant, Soil, and Nutrition Laboratory, Agricultural Research Service, Ithaca, New York 14853

Soybean plants deprived of nickel accumulated toxic concentrations of urea (2.5 percent) in necrotic lesions on their leaflet tips. This occurred regardless of whether the plants were supplied with inorganic nitrogen or were dependent on nitrogen fixation. Nickel deprivation resulted in delayed nodulation and in a reduction of early growth. Addition of nickel (1 microgram per liter) to the nutrient media prevented urea accumulation, necrosis, and growth reductions. This evidence suggests that nickel is essential for soybeans and possibly for higher plants in general.

Submitted on February 4, 1983
Accepted on June 24, 1983


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