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. 2022 May 27;11(11):1765. doi: 10.3390/cells11111765

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Impact of drought on the photosynthetic parameters. (A) Quantum yield of photosystem II photochemistry (ϕ_PSII). The right Y-axis shows volumetric water content (VWC) at the corresponding time points. (B) The quantum efficiency of open photosystem II centers (F_v/F_m). (C) Non-photochemical quenching (NPQ). (D) Energy-dependent quenching (qE). (E) Photoinhibitory quenching (qI). (F) Open photosystem II centers (qL). The values represent the mean ± SD of 5 biological replicates for both control and drought treatments.