Plants can utilize iron form Fe‐N,N'‐di‐(2‐hydroxybenzoyl)‐ethylenediamine‐N,N'‐diacetic acid, a ferric chelate with 10⁶ greater formation constant than Fe‐EDDHA.

References

• Anderegg , G. and Eplattenier , R.L. 1964 . Metal indicators 7: The acid constants and the iron complex of N,N‐ethylene‐bis‐(o‐hydroxyphenyl‐glycine) (=EHPG) (In German) . Helv. Chim. Acta , 47 : 1067 – 1075 .
   Web of Science ®Google Scholar
• Brown , J.C. , Tiffin , L.O. and Holmes , R.S. 1960 . Competition between chelating agents and roots as factor affecting absorption of iron and other ions by plant species . Plant Physiol. , 35 : 878 – 886 .
   PubMed Web of Science ®Google Scholar
• Brown , J.C. , Tiffin , L.O. , Specht , A.W. and Resnicky , J.W. 1961a . Iron absorption by roots as affected by plant species and concentration of chelating agent . Agron. J. , 53 : 81 – 85 .
   Google Scholar
• Brown , J.C. , Tiffin , L.O. , Specht , A.W. and Resnicky , J.W. 1961b . Stability and concentration of metal chelates, factors in iron chlorosis of plants . Agron. J. , 53 : 85 – 90 .
   Google Scholar
• Chaberek , S. Jr. , Bersworth , P.C. and Martell , A.E. 1954 . Chelating agents as metal buffers in biological systems. I. Principles and use of ethylenediaminetetraacetic acid . Arch. Biochem. Biophys. , 55 : 321 – 337 .
   Web of Science ®Google Scholar
• Chaney , R.L. and Bell , P.F. in press . Complexity of iron nutrition: lessons for plant‐soil interaction research . J. Plant Nutr. ,
   Web of Science ®Google Scholar
• Chaney , R.L. , Brown , J.C. and Tiffin , L.O. 1972 . Obligatory reduction of ferric chelates in iron uptake by soybeans . Plant Physiol. , 50 : 208 – 213 .
   PubMed Web of Science ®Google Scholar
• Clark , R.B. 1982 . Nutrient solution growth of sorghum and corn in mineral nutrition studies . J. Plant Nutr. , 5 : 1039 – 1057 .
   Web of Science ®Google Scholar
• Cline , G.R. , Powell , P.E. , Szaniszlo , P.J. and Reid , C.P.P. 1982 . Comparison of the abilities of hydoxamic, synthetic, and other natural organic acids to chelate iron and other ions in nutrient solution . Soil Sci. Soc. Am. J. , 46 : 1158 – 1164 .
   Web of Science ®Google Scholar
• Cronquist , A. 1981 . An Integrated System of dassification of Flowering Plants , 1262 New York : Columbia University Press .
   Google Scholar
• Dahlgren , R. 1980 . A revised system of classification of the angiosperms . Bot. J. Linn. Soc. , 80 : 91 – 124 .
   Web of Science ®Google Scholar
• DeKock , P.C. and Mitchell , R.L. 1957 . Uptake of chelated metals by plants . Soil Sci. , 84 : 55 – 62 .
   Google Scholar
• Dragun , J. , Baker , D.E. and Risius , M.L. 1976 . Growth and element accumulation by two single‐cross corn hybrids as affected by copper in solution . Agron. J. , 68 : 466 – 470 .
   Web of Science ®Google Scholar
• Folson , B.L. and Lee , C.R. 1981 . Zinc and cadmium uptake by the freshwater marsh plant Cyperus esculentus grown in contaminated sediments under reduced (flooded) and oxidized (upland) disposal conditions . J. Plant Nutr. , 3 : 233 – 244 .
   Web of Science ®Google Scholar
• Frost , A.E. , Freedman , H.H. , Westerback , S.J. and Martell , A.E. 1958 . Chelating tendencies of N,N'‐ethylene‐bis‐[2‐(o‐hydroxyphenyl)]glycine . J. Am. Chem. Soc. , 80 : 530 – 536 .
   Web of Science ®Google Scholar
• Grady , R.W. and Jacobs , A. 1981 . “ The screening of potential iron chelating drugs ” . In Development of Iron Chelators For Clinical Use , Edited by: Martell , A.E. 133 – 138 . Amsterdam : Elsevier‐North Holland Medical Press .
   Google Scholar
• Halvorson , A.D. and Lindsay , W.L. 1972 . Equilibrium relationships of metal chelates in hydroponic solutions . Soil Sci. Soc. Am. Proc. , 36 : 755 – 761 .
   Web of Science ®Google Scholar
• Halvorson , A.D. and Lindsay , W.L. 1977 . The critical Zn2+ concentration for corn and the nonabsorption of chelated zinc . Soil Sci. Soc. Am. J. , 41 : 531 – 534 .
   Web of Science ®Google Scholar
• Hershko , C. , Grady , R.W. and Link , G. 1984 . Development and evaluation of the improved iron chelating agents, EHPG, HBED, and their dimethyl esters . Haematologia , 17 : 25 – 33 .
   PubMedGoogle Scholar
• Holm , L.G. , Plucknett , D.L. , Pancho , J.V. and Herberger , J.P. 1977 . Chapter 16, Cyperus esculentus L. The World's Worst Weeds: Distribution and Biology , Honolulu : Univ. Press of Hawaii .
   Google Scholar
• Kroll , H. , Knell , M. , Powers , J. and Simonian , J. 1957 . A phenolic analog of ethylenediaminetetraacetic acid . J. Am. Chem. Soc. , 79 : 2024 – 2025 .
   Web of Science ®Google Scholar
• L'Eplattenier , F. , Murase , I. and Marteil , A.E. 1967 . New multidentate liganis. VI. Chelating tendencies of N,N'‐di(2‐hydroxybenzcy)ethylerie‐diamine‐N'‐diacetic acid . J. Am. Chem. Soc. , 89 : 837 – 843 .
   Web of Science ®Google Scholar
• Lindsay , W.L. 1979 . Chemical Equilibria in Soils , 449 New York : John Wiley & Sons .
   Google Scholar
• Martell , A.E. 1981 . “ The design and synthesis of chelating agents ” . In Development of Iron Chelators For Clinical Use , Edited by: Martell , A.E. , Anderson , W.F. and Badman , D.G. 67 – 104 . Amsterdam : Elsevier‐North Holland Press .
   Google Scholar
• Martell , A.E. and Smith , R.M. 1974 . Critical Stability Constants. Vol. 1: Amino Acids , New York : Plenum Press .
   Google Scholar
• Parker , D.R. , Zelazny , L.W. and Kinraide , T.B. 1987 . Improvements to the program GEOCHEM . Soil Sci. Soc. Am. J. , 51 : 488 – 491 .
   Web of Science ®Google Scholar
• Romheld , V. and Marschner , H. 1986 . Mobilization of iron in the rhizosphere of different plant species . Adv. Plant Nutr. , 2 : 155 – 204 .
   Google Scholar
• Romheld , V. 1987 . “ Existence of two different strategies for the acquisition of iron in higher plants ” . In Iron Transport in Microbes, Plants, and Animals , Edited by: van der Helm , D. , Neilands , J.B. and Winkelmann , G. Weinheim, , FRG : VCH. Verlags . In press
   Google Scholar
• Schroder , K.H. 1964a . Complex formation with trivalent iron and N,N'‐ethylene‐bis[2(o‐hydroxyphenyl)]glycine . Nature , 202 : 898 – 899 .
   Web of Science ®Google Scholar
• Schroder , K.H. 1964b . A study of the polarographic behavior of N,N'‐ethylenebis‐[2‐(o‐hydroxyphenyl)]‐glycine in the presence of iron ions . Acta Chem. Scand. , 18 : 596 – 602 .
   Google Scholar
• Sposito , G. and Mattigod , S.V. 1980 . GEOCHEM: A computer program for the calculation of chemical equilibria in soil solutions and other natural water systems , 92 Riverside : Kearney Foundation of Soil Science, University of California .
   Google Scholar
• Sugiura , Y. and Nomoto , K. 1984 . Phytosiderophores. Structures and properties of mugineic acids and their metal complexes . Structure & Bonding , 58 : 106 – 135 .
   Web of Science ®Google Scholar
• Tong , Y.A. , Fan , F. , Korcak , R.F. , Chaney , R.L. and Faust , M. 1986 . Effect of micronutrients, phosphorus, and chelator to iron ratio on growth, chlorosis, and nutrition of apple seedlings . J. Plant Nutr. , 9 : 23 – 41 .
   Web of Science ®Google Scholar
• Wallace , A. , Mueller , R.T. , Lunt , O.R. , Ashcroft , R.T. and Shannon , L.M. 1955 . Comparisons of five chelating agents in soils, in nutrient solutions, and in plant responses . Soil Sci. , 80 : 101 – 108 .
   Google Scholar
• Weaver , C.M. , Schmitt , H.A. , Stuart , M.A. , Mason , A.C. , Meyer , N.R. and Elliott , J.G. 1984 . Radiolabeled iron in soybeans: Intrinsic labeling and bioavailability of iron to rats from defatted flour . J. Nutr. , 114 : 1035 – 1041 .
   PubMed Web of Science ®Google Scholar