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

Zdenko Rengel, Robin D. Graham

Research output: Contribution to journalArticlepeer-review

136 Citations (Scopus)

Abstract

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 p M, 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 p M. 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.

Original languageEnglish
Pages (from-to)307-316
Number of pages10
JournalPlant and Soil
Volume176
Issue number2
DOIs
Publication statusPublished - Oct 1995
Externally publishedYes

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