Two wheat genotypes [Triticum aestivum L. cv. Warigal and T. turgidum
L. conv. durum (Desf.) MacKey cv. Durati] differing in Zn efficiency h
ad also different gas exchange characteristics. The Zn-efficient genot
ype showed higher rates of the net CO2, especially under a low Zn supp
ly and a high irradiance.