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The relationships between PSII yield/qPd and NPQ derived from the measurements on the leaves of npq4 mutant (lacking PsbS) of Arabidopsis using the scheme presented in figure 1. (b) The relationship between NPQ, actinic light intensity and qPd derived from the measurements using figure 1 scheme on 30 leaves. The legend on the right shows the qPd scale of grey shading of diamond symbols to reflect the extent of photodamage. For other details, see §3b.
