References
- Thauer , R. K. , Diekert , G. and Schoenheit , P. 1978 . Biological role of nickel . Trends Biochem. Sci. , 5 : 304 – 306 .
- Nielson , F. H. 1984 . Ultratrace elements in nutrition . Annu. Rev. Nutr. , 4 : 21 – 41 .
- Welch , R. M. 1981 . The biological significance of nickel . J. Plant Nutr. , 31 : 345 – 356 .
- Eskew , D. L. , Welch , R. M. and Cary , E. E. 1983 . Nickel: An essential micronutrient for legumes and possibly all higher plants . Science , 222 : 621 – 623 .
- Dixon , N. E. , Gazzola , C. , Blakeley , R. L. and Zerner , B. 1975 . Jack‐Bean urease (E. C. 3.5.1.5.3.). A metalloenzyme. A simple biological role for nickel . J. Am. Chem. Soc. , 97 : 4131 – 4133 .
- Smith , N. G. and Woodburn , J. 1983 . Nickel and ethylene involvement in the senescence of leaves and flowers . Naturwissenschaften , 71 : 210 – 211 .
- Morgutti , S. M. , Sacchi , G. A. and Cocucci , S. M. 1984 . Effects of Ni2+ on proton extrusion, dark CO2 fixation and malate synthesis in maize roots . Physiol. Plant. , 60 : 70 – 74 .
- Anke , M. , Groppel , B. , Kronemann , H. and Grün , M. 1984 . Nickel in the Human Environment , Edited by: Sunderman , J. R. and Aito , A. 339 – 365 . N.Y. : IARC Sci. Publ. .
- Walker , C. D. , Graham , R. D. , Madison , J. T. , Cary , E. E. and Welch , R. M. 1985 . Effects of nickel deficiency on some nitrogen metabolites in cowpea (Vigna unguiculata L. Walp.) . Plant Physiol. , 79 : 474 – 479 .
- Eskew , D. L. , Welch , R. M. and Cary , E. E. 1984 . A simple plant nutrient solution purification method for effective removal of trace metals using controlled pore glass‐bead 8‐hydroxyquijnoline chelation column chromatography . Plant Physiol. , 76 : 103 – 105 .
- Eskew , D. L. , Welch , R. M. and Norvel , W. A. 1984 . Nickel in higher plants. Further evidence for an essential role . Plant Physiol. , 76 : 691 – 693 .
- Ulrich , A. and Hills , F. G. 1967 . Plant Analysis , Madison : Soil Science Soc. of America .
- Bollard , E. G. 1959 . Urease, urea and ureides in plants . Symp. Soc. Exp. Biol. , 13 : 304 – 329 .
- Watanabe , Y. , Saramura , H. and Himada , N. 1984 . Distribution of urease in higher plants . Chiba Diagaku Engeigakabu Gakujutsu Hokuku , 32 : 37 – 43 .
- Rainbird , R. M. , Thorne , J. H. and Hardy , R. W. F. 1984 . Role of amides, amino acids and ureides in the nutrition of developing soybean seeds . Plant Physiol. , 74 : 329 – 334 .
- Mishra , D. and Kar , M. 1974 . Nickel in plant growth and metabolism . Bot. Rev. , 40 : 395 – 452 .
- Lau , O. and Yang , S. F. 1976 . Inhibition of ethylene production by cobaltous ion . Plant Physiol. , 58 : 114 – 117 .
- Dalton , D. A. , Evans , H. J. and Hanus , F. J. 1985 . Effects of nickel fertilization on soybeans . Plant Soil , 88 : 245 – 258 .