Differential response of corn inbreds to calcium

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Abstract
Differential responses were noted among several corn (Zea mays L.) inbreds for Ca when grown in nutrient solutions at varied Ca stresses. Properties of one of the more Ca-efficient inbreds (Oh43) compared to 1 of the more Ca-inefficient inbreds (A251) are reported. Oh43 produced more dry matter and developed fewer Ca stress symptoms when grown at both low and high Ca or with high Mg and K than A251. Comparable dry matter was produced by Oh43 at 4 times less Ca than A251. Oh43 also produced more dry matter per unit Ca than A251. Oh43 leaves and roots had lower Ca concentrations than A251 leaves and roots. With added Ca to solutions, Mg, K, Mn, Zn and Cu concentrations decreased more in A251 than in Oh43. A251 contained higher P concentrations than Oh43. Functional and critical Ca concentrations were lower in Oh43 than in A251. Oh43 should grow and adapt better to Ca stress conditions than A251.