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Figure 5. Relationship of the difference between the newer (‘NK N25-J7’) and older (‘Pride 5’) maize (Zea mays L.) hybrid in carbon exchange rate per unit absorbed photosynthetic photon flux density (CER Abs–1) vs. the difference between the newer and older hybrid in thylakoid electron transport rate (ETR) for plants grown at low and high N levels. Differences are expressed as a proportion of the value of the newer hybrid (i.e., 100% x [NK N25-J7 – Pride 5]/NK N25-J7), and the dashed line indicates the 1:1 ratio.
