Exogenous paclobutrazol can relieve the low irradiance stress in Capsicum annuum seedlings

Received 3 April 2021, last revision 7 August 2021, accepted 1 September 2021. Abbreviations: ABS/CSo absorption flux per cross section (CS) (at t = 0); ABS/RC radiation energy absorbed by RC; Chl chlorophyll; DIo/CSo dissipated energy flux per cross section (CS) (at t = 0); DIo/RC light energy dissipated by RC (at t = 0); ETo/CSo electron transport flux per cross section (CS) (at t = 0); ETo/RC the RC unit of the reaction center captures the energy used for electron transport (at t = 0); Fm maximal chlorophyll fluorescence measured in the dark-adapted state during the application of a saturating radiation pulse; Fo minimal chlorophyll fluorescence measured in the dark-adapted state when all PS II RCs are open; Fv/Fm maximum quantum yield of PS II photochemistry measured in the dark-adapted state; Fv/F0 efficiency of the water-splitting complex on the donor side of PS II; GA3 gibberellic acid; MDA malondialdehyde; PN net photosynthetic rate; PP333 paclobutrazol; PS photosystem; LCP light compensation point; RC reaction center of PS II; TBA thiobarbituric acid; TCA trichloroacetic acid; TRo/CSo trapped energy flux per cross section (CS) (at t = 0); TRo/RC RC captures energy used to restore QA (at t = 0). Acknowledgements: This work was supported by the Natural science foundation of higher education institutions of Anhui province, China (KJ2018A0155). +These authors contributed equally. Conflict of interest: The authors declare that they have no conflict of interest. Abstract