Photosynthetica 2024, 62(2):168-179 | DOI: 10.32615/ps.2024.012

Selenite foliar application increased the accumulation of medicinal components in Paeonia ostii by promoting antioxidant capacity, reducing oxidative stress, and improving photosynthetic capacity

L.X. ZHANG1, †, Q.S. CHANG2, †, Y.L. HE1, X.L. ZHAO1, W. LIU1, Q. GUO1, K. CHEN1, X.G. HOU1
1 College of Agriculture, Henan University of Science and Technology, 471003 Luoyang, China
2 College of Horticulture and Plant Protection, Henan University of Science and Technology, 471003 Luoyang, China

The effects of selenite (0, 15, 30, 45 mg L-1) on physiological characteristics and medicinal components of Paeonia ostii were analyzed. The results showed that selenite application promoted the activity of superoxide dismutase and the contents of soluble sugar, proline, carotenoids, total flavonoids, and total polyphenols, and decreased the contents of reactive oxygen species, relative electrical conductivity, and malondialdehyde. In addition, selenite also increased chlorophyll content, improved electron transfer ability, PSI and PSII performance, and the coordination between PSI and PSII, which significantly improved photosynthetic capacity. Moreover, selenite treatment also greatly increased the contents of gallic acid, catechin, albiflorin, paeoniflorin, benzoic acid, and paeonol in Moutan cortex radicis (MCR). These results showed that selenite effectively protected the photosynthetic apparatus from photooxidative damage by enhancing antioxidant capacity, improving photosynthetic capacity, and increasing the content of the medicinal compounds in MCR.

Additional key words: chlorophyll fluorescence; Paeonia ostii; photosynthesis; secondary metabolites; selenite.

Received: October 18, 2023; Revised: January 23, 2024; Accepted: February 6, 2024; Prepublished online: March 21, 2024; Published: June 27, 2024  Show citation

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ZHANG, L.X., CHANG, Q.S., HE, Y.L., ZHAO, X.L., LIU, W., GUO, Q., CHEN, K., & HOU, X.G. (2024). Selenite foliar application increased the accumulation of medicinal components in Paeonia ostii by promoting antioxidant capacity, reducing oxidative stress, and improving photosynthetic capacity. Photosynthetica, 62(2), 168-179. doi: 10.32615/ps.2024.012
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