
%0 Journal Article
%A Leece, DR 
%T Distribution of physiologically inactive zinc in maize growing on a black earth soil
%J Australian Journal of Agricultural Research
%D 1978/08/01
%V 29
%N 4
%P 749-758
%K 
%R https://doi.org/10.1071/AR9780749
%U https://www.publish.csiro.au/paper/AR9780749 
%X Physiologically inactive zinc occurred in the roots and leaves but not the stems of maize seedlings when grown for 30 days in pots on a black earth soil. Expanded leaves had very high zinc concentrations (60&ndash;200 &#181;g/g), yet expressed symptoms of zinc deficiency, which indicated that most of the zinc in these tissues was inactive. By contrast, stem tissue, which was 36&#37; leaf sheaths and 64&#37; new leaves and meristems, contained low levels of zinc (17 &#181;g/g) when unfertilized and normal levels (27 &#181;g/g) when fertilized with 10 &#181;g/g zinc. Stem growth indicated that this zinc was active. Fertilizer phosphorus (200 &#181;g/g) induced phosphorus/zinc imbalance and inactivated zinc further in roots, certain expanded leaves, and the stem. Zinc and phosphorus deficiencies and zinc inactivation were prevented by fertilization with both zinc (10 &#181;g/g) and phosphorus (200 &#181;g/g). This system is proposed as a model for the study of chemical and biochemical forms of active and inactive zinc in maize. 
