Influence of linoleic acid on growth, oxidative stress and photosynthesis of the cyanobacterium <i>Cylindrospermopsis raciborskii</i>

Xu, Sha; Yang, S-Q; Yang, Y-J; Xu, J-Z; Shi, J-Q; Wu, Z-X

doi:10.1080/00288330.2016.1197286

Cited by 8 publications

(6 citation statements)

References 44 publications

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“…To moderate the oxidative damage, U. prolifera upregulated the activity of SOD and CAT, supported herein by the gene expression level of upMnSOD and upCAT in the LC treatments ( Figure 5). Similar responses have been noted in Cylindrospermopsis raciborskii under hyper-salinity or light-stress conditions [63,64], and linoleic acid stress [65]. The upregulation of the transcript levels of FeSOD and CAT genes in U. prolifera have also been reported in response to salicylic acid and hyper-temperature [66].…”

Section: Discussionsupporting

confidence: 72%

“…The depletion of the transcript pools of LhcSR and PsbS contributed directly to the decrease in NPQ activity and likely inactivated the PSII RCs' complexes. Downregulation of Chl a and b corresponded to the downregulation of PsbA expression levels, suggesting the BE23 filtrate degraded the absorption of light energy and blocked the electron transport on the PSII receptor side [65,80]. Surplus electrons exceeded the electron transport chain capacity of U. prolifera and induced additional ROS production (Figure 3) that, in turn, damaged the PSII systems [16].…”

Section: Discussionmentioning

confidence: 99%

“…External stresses, including allelopathic stressors, can alter the algal energy flux of PSII by reducing the photosynthetic efficiency [67][68][69], and by enhancing non-photochemical quenching (NPQ) [65]. The maximum quantum yield (Fv/Fm) is an effective indicator of the efficiency of photochemical stress.…”

Section: Discussionmentioning

confidence: 99%

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Allelopathic Inhibition by the Bacteria Bacillus cereus BE23 on Growth and Photosynthesis of the Macroalga Ulva prolifera

Zhang

Zhao

et al. 2020

JMSE

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Bacteria-derived allelopathic effects on microalgae blooms have been studied with an aim to develop algicidal products that may have field applications. However, few such studies have been conducted on macroalgae. Therefore, a series of experiments was conducted to investigate the impacts of different concentrations of cell-free filtrate of the bacteria Bacillus cereus BE23 on Ulva prolifera. Excessive reactive oxygen species (ROS) were produced when these cells were exposed to high concentrations of filtrate relative to f/2 medium. In such conditions, the antioxidative defense system of the macroalga was activated as shown by activities of the enzymes superoxide dismutase (SOD) and catalase (CAT) and upregulation of the associated genes upMnSOD and upCAT. High concentrations of filtrate also inhibited growth of U. prolifera, and reduced chlorophyll a and b, the photosynthetic efficiency (Fv/Fm), and the electron transport rate (rETR). Non-photochemical quenching (NPQ) was also inhibited, as evidenced by the downregulation of the photoprotective genes PsbS and LhcSR. Collectively, this evidence indicates that the alteration of energy dissipation caused excess cellular ROS accumulation that further induced oxidative damage on the photosynthesis apparatus of the D1 protein. The potential allelochemicals were further isolated by five steps of extraction and insolation (solid phase–liquid phase–open column–UPLC–preHPLC) and identified as N-phenethylacetamide, cyclo (L-Pro-L-Val), and cyclo (L-Pro-L-Pro) by HR-ESI-MS and NMR spectra. The diketopiperazines derivative, cyclo (L-Pro-L-Pro), exhibited the highest inhibition on U. prolifera and may be a good candidate as an algicidal product for green algae bloom control.

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Section: Discussionsupporting

confidence: 72%

Section: Discussionmentioning

confidence: 99%

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Allelopathic Inhibition by the Bacteria Bacillus cereus BE23 on Growth and Photosynthesis of the Macroalga Ulva prolifera

Zhang

Zhao

et al. 2020

JMSE

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“…Similar results have also been reported by Asaeda et al [47], who showed that the chlorophyll a content of M. spicatum declined under high environmental stress. These results suggest that the ability of M. spicatum cells to synthesize chlorophyll was reduced in the presence of decomposing liquid, and the lower chlorophyll content in the treatment groups reflected a reduction in the antenna size of the photosynthetic RC complexes and thus their ability to capture light energy declined [48].…”

Section: Effects On the Photosynthetic System Of M Spicatum Apical Fmentioning

confidence: 83%

The Response of Regeneration Ability of Myriophyllum spicatum Apical Fragments to Decaying Cladophora oligoclona

Zhang

Huang

Xue

et al. 2019

Water

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During the restoration of eutrophic shallow lakes, submerged macrophyte recovery is often accompanied by an excessive proliferation of filamentous green algae (FGA). This can lead to the recession or even disappearance of the submerged macrophytes in these lakes. However, the use of plant fragments in reproduction and dispersion is an important life history strategy for submerged macrophytes. In this work, it studied apical fragment propagation in Myriophyllum spicatum and its physiological and biochemical responses to the decomposing liquid of Cladophora oligoclona. Myriophyllum spicatum apical fragments showed no new roots or buds when treated with 0.4 times the original decomposing liquid, and their PSII functional parameters were lower than those of the control. In contrast, the relevant sugar content accumulated to 115.26%, and the activities of an energy enzyme (Ca2+/Mg2+-ATPase) and a secondary metabolic-related enzyme (PAL) increased by 490.63% and 28.13%, showing an elevated defense response. These results indicated that the early regeneration of M. spicatum could be hindered by environmental stress, and that this may further affect the reproduction and colonization of these submerged macrophytes.

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“…However, high levels of linolenic acid can also cause oxidative stress in plants. Xu et al found that a high concentration of linolenic acid increased the amount of ROS in green algae and caused membrane lipid peroxidation [ 62 ].…”

Section: Discussionmentioning

confidence: 99%

Biochar-Dual Oxidant Composite Particles Alleviate the Oxidative Stress of Phenolic Acid on Tomato Seed Germination

Shen

Peng

et al. 2023

Antioxidants

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Phenolic acid is a well-known allelochemical, but also a pollutant in soil and water impeding crop production. Biochar is a multifunctional material widely used to mitigate the phenolic acids allelopathic effect. However, phenolic acid absorbed by biochar can still be released. In order to improve the removal efficiency of phenolic acids by biochar, the biochar-dual oxidant (BDO) composite particles were synthesized in this study, and the underlying mechanism of the BDO particles in ameliorating p-coumaric acid (p-CA) oxidative damage to tomato seed germination was revealed. Upon p-CA treatment, the BDO composite particles application increased the radical length, radical surface area, and germination index by 95.0%, 52.8%, and 114.6%, respectively. Compared to using biochar or oxidants alone, the BDO particles addition resulted in a higher removal rate of p-CA and produced more O2•−, HO•, SO4•− and 1O2 radicals via autocatalytic action, suggesting that BDO particles removed phenolic acid by both adsorption and free radical oxidation. The addition of BDO particles maintained the levels of the antioxidant enzyme activity close to the control, and reduced the malondialdehyde and H2O2 by 49.7% and 49.5%, compared to the p-CA treatment. Integrative metabolomic and transcriptomic analyses revealed that 14 key metabolites and 62 genes were involved in phenylalanine and linoleic acid metabolism, which increased dramatically under p-CA stress but down-regulated with the addition of BDO particles. This study proved that the use of BDO composite particles could alleviate the oxidative stress of phenolic acid on tomato seeds. The findings will provide unprecedented insights into the application and mechanism of such composite particles as continuous cropping soil conditioners.

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Influence of linoleic acid on growth, oxidative stress and photosynthesis of the cyanobacterium Cylindrospermopsis raciborskii

Cited by 8 publications

References 44 publications

Allelopathic Inhibition by the Bacteria Bacillus cereus BE23 on Growth and Photosynthesis of the Macroalga Ulva prolifera

Allelopathic Inhibition by the Bacteria Bacillus cereus BE23 on Growth and Photosynthesis of the Macroalga Ulva prolifera

The Response of Regeneration Ability of Myriophyllum spicatum Apical Fragments to Decaying Cladophora oligoclona

Biochar-Dual Oxidant Composite Particles Alleviate the Oxidative Stress of Phenolic Acid on Tomato Seed Germination

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