Pigment content and photosynthetic parameters The contents of Chl a , Chl b , Car, and Chl ( a + b ) in all treatments showed a trend of rising first and then decreasing ( Fig. 2 ).
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Selenite foliar application increased the accumulation of medicinal components in <i>Paeonia ostii</i> by promoting antioxidant capacity, reducing oxidative stress, and improving photosynthetic capacity.
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