Plant and Soil

, Volume 176, Issue 2, pp 307–316 | Cite as

Wheat genotypes differ in Zn efficiency when grown in chelate-buffered nutrient solution

I. Growth
  • Zdenko Rengel
  • Robin D. Graham
Research Article


Ten Triticum aestivum and two Triticum turgidum conv. durum genotypes were grown in chelate-buffered nutrient solution at Zn supplies ranging from deficient to sufficient (free Zn activities from 2 to 200 pM, pZn from 11.7 to 9.7). The critical level of Zn ion activity in solution for healthy growth of wheat plants was around 40 pM. Genotypes differed in the growth response: those classified as Zn-efficient suffered less reduction of shoot growth and did not change the rate of root growth at a Zn supply quite deficient for Zn-inefficient genotypes. Root growth of Zn-inefficient genotypes increased at deficient Zn supply. The shoot/root ratio was the most sensitive parameter of Zn efficiency; Zn-efficient genotypes showed less reduction in the ratio when grown at deficient compared to sufficient Zn supply. Classification of wheat genotypes into Zn-efficient and Zn-inefficient groups after screening in chelate-buffered nutrient solution corresponded well with classification obtained in field experiments on Zn-deficient soil.

Key words

chelate deficiency genotypic differences growth screening Triticum zinc 


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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • Zdenko Rengel
    • 1
  • Robin D. Graham
    • 1
  1. 1.Department of Plant Science, Waite Agricultural Research InstituteUniversity of AdelaideAustralia

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