Effect of allelochemicals on photosynthetic and antioxidant defense system of Ulva prolifera

Li, Naicheng; Tong, Mengmeng; Glibert, Patricia M.

doi:10.1016/j.aquatox.2020.105513

Cited by 24 publications

(11 citation statements)

References 60 publications

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“…), together with other phenylpropanoids might contribute to this worst invasive alien species [ 21 ]. Several studies reported on the phytotoxic effects of eugenol [ 22 , 23 ]. It inhibited Avena fatua L. weed germination and strongly suppressed seedling root growth by activating oxidative stress and membrane damage in the root tissue [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Piper betle L. Extract and Allelochemical Eugenol on Rice and Associated Weeds Germination and Seedling Growth

Choopayak

Aranyakanon

Prompakdee

et al. 2022

Plants

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Natural herbicide is considered as a sustainable approach for weed management in agriculture. Here, allelopathic activities of Piper betle L. extract (BE) and known allelochemical eugenol (EU) were studied against rice and associated weeds in terms of germination and seedling growth. Five plant species including a rice crop (Oryza sativa L.); a dicot weed, false daisy (Eclipta prostrata (L.) L.); and three monocot weeds, barnyard grass (Echinochloa crus-galli (L.) P. Beauv.), swollen fingergrass (Chloris barbata Sw.), and weedy rice (Oryza sativa f. spontanea Roshev.) were studied. The paper-based results demonstrated that BE and EU had inhibitory effects on seed germination and seedling growth. The IC50 values of BE and EU for seed germination were ranked from swollen fingergrass, to false daisy, barnyard grass, rice, and weedy rice, respectively. The ratio of root to shoot length of the seedlings indicated that the roots were more affected by the treatments than the shoots. In addition, the gel-based results showed the reduction of the rice seedling root system, especially on lateral root length and the numbers upon the treatments. Taken together, BE had an allelopathic activity similar to that of EU. Interestingly, the major paddy weed, barnyard grass, was more sensitive to BE than rice, underlining BE as a natural herbicide in rice agriculture.

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Section: Introductionmentioning

confidence: 99%

Effects of Piper betle L. Extract and Allelochemical Eugenol on Rice and Associated Weeds Germination and Seedling Growth

Choopayak

Aranyakanon

Prompakdee

et al. 2022

Plants

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“…Meanwhile, the nutrients, including the inorganic nutrient from f/2 + artificial seawater and the nutrient carrying over by the B. cereus BE23 filtrate (4~40 mL), contributed to the growth of macroalga. Inorganic nitrogen, i.e., nitrate or ammonium, has been reported to be rapidly taken up by Ulva [28], and within 192 h, the addition of inorganic nutrient of f/2 medium was calculated to be sufficient to the thalli of U. prolifera [50,51]. The carried-over inorganic nutrient was low (less than 10%), therefore, the effects of nutrients in B. cereus BE23 filtrate were minimal to the growth of Ulva in the present study.…”

Section: Discussionmentioning

confidence: 99%

“…The maximum quantum yield (Fv/Fm) is an effective indicator of the efficiency of photochemical stress. In Ulva sp., changes in Fv/Fm have been observed when the algae are exposed to internal or external stresses [70] such as light [71], desiccation [72], salinity [73], and allelopathy [50].…”

Section: Discussionmentioning

confidence: 99%

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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“…The excess energy, driven by exogenous stress, had a negative effect on the diatom Phaeodactylum tricornutum [81,82], dinoflagellate Prorocentrum donghaiense [83,84], prymnesiophyte Phaeocystis globosa [84,85], estuarine phytoplankton [24], and polar phytoplankton in the Polar Frontal Zone and Antarctic waters [86]. The antioxidative defense system is initiated to scavenge excess ROS [82,87].…”

Section: Toxinological Mechanism Of Hemolytic Activitymentioning

confidence: 99%

“…The toxigenic and toxicological mechanisms of action of these fish-killing species; however, remain largely unclear due to the toxins' instability, multiple structures and/or synergistic or antagonistic effects. Hemolytic compounds extracted from C. marina were identified as polyunsaturated fatty acids [13,18], or lipids and glycolipids [24], or chlorophyll (chl) c derivatives [20]. Those extracted from Heterocapsa circularisquama were characterized as a porphyrin derivative with a chemical structure similar to a pyropheophorbide a methyl ester [7].…”

Section: Introductionmentioning

confidence: 99%

Hemolytic Activity in Relation to the Photosynthetic System in Chattonella marina and Chattonella ovata

Tong

Gou

et al. 2021

Marine Drugs

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Chattonella species, C. marina and C. ovata, are harmful raphidophycean flagellates known to have hemolytic effects on many marine organisms and resulting in massive ecological damage worldwide. However, knowledge of the toxigenic mechanism of these ichthyotoxic flagellates is still limited. Light was reported to be responsible for the hemolytic activity (HA) of Chattonella species. Therefore, the response of photoprotective, photosynthetic accessory pigments, the photosystem II (PSII) electron transport chain, as well as HA were investigated in non-axenic C. marina and C. ovata cultures under variable environmental conditions (light, iron and addition of photosynthetic inhibitors). HA and hydrogen peroxide (H2O2) were quantified using erythrocytes and pHPA assay. Results confirmed that% HA of Chattonella was initiated by light, but was not always elicited during cell division. Exponential growth of C. marina and C. ovata under the light over 100 µmol m−2 s−1 or iron-sufficient conditions elicited high hemolytic activity. Inhibitors of PSII reduced the HA of C. marina, but had no effect on C. ovata. The toxicological response indicated that HA in Chattonella was not associated with the photoprotective system, i.e., xanthophyll cycle and regulation of reactive oxygen species, nor the PSII electron transport chain, but most likely occurred during energy transport through the light-harvesting antenna pigments. A positive, highly significant relationship between HA and chlorophyll (chl) biosynthesis pigments, especially chl c2 and chl a, in both species, indicated that hemolytic toxin may be generated during electron/energy transfer through the chl c2 biosynthesis pathway.

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Effect of allelochemicals on photosynthetic and antioxidant defense system of Ulva prolifera

Cited by 24 publications

References 60 publications

Effects of Piper betle L. Extract and Allelochemical Eugenol on Rice and Associated Weeds Germination and Seedling Growth

Effects of Piper betle L. Extract and Allelochemical Eugenol on Rice and Associated Weeds Germination and Seedling Growth

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

Hemolytic Activity in Relation to the Photosynthetic System in Chattonella marina and Chattonella ovata

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