Relationship between allocation of absorbed light energy in PSII and photosynthetic rates of C3 and C4 plants.

摘要: Two C3 dicotyledonous crops and five C4 monocotyledons treated with three levels of nitrogen were used to evaluate quantitatively the relationship between allocation absorbed light energy in PSII photosynthetic rates (PN) a warm condition (25–26°C) at four [200, 400, 800, 1,200 (both C4) 2,000 (C4 only) μmol m−2 s−1] photon flux density (PPFD). For plants same type (C3 or C4), there was linear positive correlation fraction that utilized photochemistry (P) PN, regardless broad range their due species-specific effect and/or application; meanwhile, dissipated through non-photochemical quenching (D) showed negative regression PN for each level PPFD. The intercept lines P decreased, D increased increasing With as main components dissipation complementary other, excess (E) unchanged by under At had lower higher than plants, fact little no photorespiration is considered limited sink electrons. Nevertheless significant when data from both varied PPFD merged. slope 0.85, indicating types, most unnecessary (ca. 85%) could dissipate quenching, inhibited low limitation all illumination experiment.