Response of stomatal conductance, transpiration, and photosynthesis to light and CO₂ for rice leaves with different appearance days.

Chlorophyll activity, Rubisco activity, RuBP regeneration capacity, and nitrogen content (positively correlated with the photosynthetic potential of leaves) generally exhibited an increasing trend during the leaf expansion phase, followed by the maintenance of relatively high values, and then decreased as the leaves aged ( Murchie et al., 2002 ; Suzuki et al., 2009 ; Gunasekera et al., 2013 ), which might be the primary reasons for the variation in g sw , T r , and P n .

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