Toxic mechanism of two cyanobacterial volatiles β-cyclocitral and β-ionone on the photosynthesis in duckweed by altering gene expression

Du S.; Xu H.; Yang M.Pan N.Zheng T.Xu C.Li Y.Zuo Z.

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Toxic mechanism of two cyanobacterial volatiles β-cyclocitral and β-ionone on the photosynthesis in duckweed by altering gene expression

机译：Toxic mechanism of two cyanobacterial volatiles β-cyclocitral and β-ionone on the photosynthesis in duckweed by altering gene expression

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? 2022 Elsevier LtdVolatile organic compounds (VOCs) promote cyanobacteria dominating eutrophicated waters, with aquatic plant decrease and even disappearance. To uncover the toxic mechanism of cyanobacterial VOCs on aquatic plants, we investigated the growth, photosynthetic pigment levels, photosynthetic abilities and related gene expression in duckweed treated with β-cyclocitral and β-ionone, 2 main components in the VOCs. The levels of chlorophylls and carotenoids gradually declined with raising the concentration of the 2 compounds and prolonging the treatment time. Their decline should result from the down-regulation of 8 genes associated with photosynthetic pigment biosynthesis and up-regulation of 2 genes involved in carotenoid degradation. The reduction was also found in the photosystem II (PSII) efficiency and O2 evolution rate, which should result from the lowered photosynthetic pigment levels and down-regulation of 38 genes related with photosynthetic process. The frond numbers, total frond area and fresh weight gradually decreased with raising the 2 compound concentration, which may result from the lowered photosynthetic abilities as well as down-regulated expression of 7 genes associated with growth-promoting hormone biosynthesis and signal transduction. It can be speculated that cyanobacterial VOCs may poison aquatic plants by lowering the photosynthesis and growth through altering related gene expression.

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《Environmental Pollution》 |2022年第9期|119711.1-119711.10|共10页
作者
Du S.; Xu H.; Yang M.Pan N.Zheng T.Xu C.Li Y.Zuo Z.;
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作者单位

State Key Laboratory of Subtropical Silviculture Zhejiang A&F University||Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions Zhejiang A&F University;

State Key Laboratory of Subtropical Silviculture Zhejiang A&F University;

State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityState Key Laboratory of Subtropical Silviculture Zhejiang A&F University||Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions Zhejiang A&F Universi;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
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Gene expression; Photosynthetic ability; Toxic mechanism; β-Cyclocitral; β-Ionone;

Toxic mechanism of two cyanobacterial volatiles β-cyclocitral and β-ionone on the photosynthesis in duckweed by altering gene expression

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