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. 2022 Oct 13;23(20):12247. doi: 10.3390/ijms232012247

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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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Changes in (A) total chlorophyll content, (B) chlorophyll a content, (C) chlorophyll b content, (D) chlorophyll a/b ratio, (E) photochemical efficiency, (F) performance index on absorption basis, (G) malondialdehyde content, and (H) electrolyte leakage of wild type (WT) and transgenic Arabidopsis thaliana overexpressing the TrSAMS (OE4 and OE5) involved in spermidine biosynthesis under normal condition and heat stress. Vertical bars indicate ±SE of mean (n = 4). Different letters above column indicate significant differences (p ≤ 0.05) among treatments under a particular condition (normal condition or heat stress). The asterisk “*” indicates significant differences (p ≤ 0.05) for a particular material (WT, OE4, or OE5) for comparison between normal condition and heat stress.