ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2021
·
IF 6.291
Chunyu Jiang,Shixing Zhou,Lin Liu,Zokir Toshmatov,Ling Huang,Kai Shi,Chi Zhang,Hua Shao
The chemical profile and the phytotoxicity of Artemisia absinthium essential oil (EO) were investigated to evaluate its potential value as a biopesticide for food safety purposes. A total of 54 compounds were identified in A. absinthium EO, with the most abundant constituents being eucalyptol (25.59%), linalool (11.99%), and β-myrcene (10.05%). The EO, linalool, and a mixture of three major components exhibited potent suppressive activity against four receiver species; however, eucalyptol and β-myrcene showed a much weaker effect. Bioassay-guided fractionation led to the isolation of linalool as the major active compound responsible for the EO’s phytotoxicity. Subsequent scanning electron microscopy (SEM) analysis revealed that linalool significantly inhibited root-hair formation and metaxylem development. This is the first report on the determination of linalool as the major active phytotoxic compound in A. absinthium EO, as well as the elucidation of its mechanism of phytotoxicity from the perspective of root structure changes in the receiver species. Our results suggest that both the EO and its major constituents have potential value as environmentally friendly herbicides.
研究领域:
植物学
·
食品科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Kai Sun,Qingzhu Liu,Jie Liu,Shunyao Li,Xuemin Qi,Meihua Chen,Youbin Si,Yanzheng Gao
How humic acid (HA) modifies bisphenol A (BPA) conversion in exoenzyme-activated polyreaction is poorly understood. Herein, the influencing mechanism of HA on laccase-induced BPA self-polymerization was investigated, and the phytotoxicity of the produced BPA self/co-polymers was assessed for the first time. HA prominently boosted BPA elimination, and the rate constants of BPA conversion augmented from 0.61 to 1.43 h −1 as HA level raised from 0 to 50 mg·L −1 . It is because the generated BPA-HA co-polymers promptly lowered the yields of long-chain BPA self-oligomers, consequently maintaining laccase activity through opening enzymatic substrate-binding pockets. Notably, a few BPA monomers were re-released from the loosely bound self-polymers and co-polymers, and the releasing amounts respectively were 13.9 − 22.4% and 0.3 − 0.5% at pH 2 − 11. Formation of self/co-polymers was greatly conducive to avoiding BPA biotoxicity. Compared with BPA self-polymers, the phytotoxicity of BPA co-polymers to germinated radish ( Raphanus sativus L.) seeds was lower due to these covalently bound products were more complex and stable. It follows that laccase-mediated co-polymerization played a significant role in BPA conversion, contaminant detoxification, and carbon sequestration . These findings are not only beneficial to clarifying exoenzyme-activated the generation mechanism of BPA co-polymers in water, but to reusing these supramolecular aggregates in crop growth.
研究领域:
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2015
·
IF 4.143
Xinping Yang,Chengchen Ye,Yu Liu,Fang-Jie Zhao
Perfluorooctanoic acid (PFOA) is widely used in the manufacture of many industrial and household products. To assess the potential environmental risk of PFOA, its accumulation, translocation and phytotoxic effects were investigated using the model plant species Arabidopsis thaliana . Exposure to 18 μM PFOA-F in agar plates did not affect plant growth, but 181–1811 μM PFOA-F inhibited root and shoot growth. PFOA was more phytotoxic on shoot growth than NaF at the equivalent F concentration, with the latter having 3.9–7.6 times higher EC50 for shoot biomass than PFOA. PFOA was efficiently translocated from roots to shoots, where it existed as intact PFOA molecules without transformation evidenced by the 19 F NMR spectra. PFOA caused a significant increase in the concentration of H 2 O 2 and malondialdehyde (MDA) in shoots, indicating that oxidative stress is a likely cause of PFOA phytotoxicity.
研究领域:
植物学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Lirui Ren,Jianing Zhao,Wenjing Li,Qingjie Li,Daqi Zhang,Wensheng Fang,Dongdong Yan,Yuan Li,Qiuxia Wang,Xi Jin,Aocheng Cao
An accurate controlled-release strategy of pesticides is considered desirable in sustainable agriculture. A site-specific nanorelease system of dazomet (DZ) was proposed by employing the zeolitic imidazolate framework-8 composite (DZ@ZIF-8) by a one-pot method. The synthetic parameters of DZ@ZIF-8 were optimized, and the loading content of DZ was maximized. ZIF-8 endowed DZ with a pH-sensitive behavior. The collapse of the DZ@ZIF-8 structure and the site-specific release of DZ were triggered by acidic substances produced by Botrytis cinerea. In vitro and pot experiments showed that the fungicidal activity of DZ@ZIF-8 was about 36.3 and 42.7% higher than that of DZ, respectively. DZ is conventionally used before a crop is planted because of its volatility and toxicity. However, DZ@ZIF-8 could avoid phytotoxicity of DZ to plants, which made the application of DZ possible during plant growth. Moreover, the acute toxicity to zebrafish changed from high to moderate levels. This study highlights a potential strategy that improves DZ effective utilization and reduces side effects.
研究领域:
农业科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PNAS Nexus
·
2024
·Vol. 3
·期 4
·
IF 2.2
Sun Kai,Dai Ling-Zhi,Chen Mei-Hua,Si You-Bin,Fang Guo-Dong,Li Shun-Yao,Yu Han-Qing
Enzymatic humification plays a crucial biogeochemical role in eliminating steroidal estrogens and expanding organic carbon stocks. Estrogenic contaminants in agroecosystems can be taken up and acropetally translocated by crops, but the roles of laccase-triggered rhizospheric humification (L-TRH) in pollutant dissipation and plant uptake remain poorly understood. In this study, the laccase-induced decontamination and humification mechanisms of 17β-estradiol (E2) in water–crop media were investigated by performing greenhouse pot experiments with maize seedlings (Zea mays L.). The results demonstrated that L-TRH effectively dissipated E2 in the rhizosphere solution and achieved the kinetic constants of E2 dissipation at 10 and 50 μM by 8.05 and 2.75 times as much as the treatments without laccase addition, respectively. The copolymerization of E2 and root exudates (i.e. phenols and amino acids) consolidated by L-TRH produced a larger amount of humified precipitates with the richly functional carbon architectures. The growth parameters and photosynthetic pigment levels of maize seedlings were greatly impeded after a 120-h exposure to 50 μM E2, but L-TRH motivated the detoxication process and thus mitigated the phytotoxicity and bioavailability of E2. The tested E2 contents in the maize tissues initially increased sharply with the cultivation time but decreased steadily. Compared with the treatment without laccase addition, the uptake and accumulation of E2 in the maize tissues were obviously diminished by L-TRH. E2 oligomers such as dimer, trimer, and tetramer recognized in the rhizosphere solution were also detected in the root tissues but not in the shoots, demonstrating that the acropetal translocation of E2 oligomers was interrupted. These results highlight a promising strategy for decontaminating estrogenic pollutants, boosting rhizospheric humification, and realizing low-carbon emissions, which would be beneficial for agroenvironmental bioremediation and sustainability.
研究领域:
环境科学
·
农业科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Sarah Omar,Mirna Omar,Nour F. Attia,Gehan M. El-Subruiti,Abdelazeem Eltaweil
Cleaner production processes in conjunction with sustainability is the main requirement for clean and cost-effective industrial process. Moreover, the rapid growth of the world population in conjunction with limited sources of drinking water anticipated water crisis in many countries. Herein, indirect Z-scheme ZnO-3%SrO-2CdS photocatalyst was fabricated for the first time via thermal treatment and well identified by XRD, FT-IR, SEM, EDX and, XPS, meanwhile, the optical properties were evaluated using DRS, PL, and EPR analyses. The photocatalytic activity of noble metal free ZnO-3%SrO-2CdS was investigated in the photodegradation of six antibiotics, namely tetracycline, doxycycline, ofloxacin, amoxicillin, cephalexin, and sulfamethoxazole. Furthermore, kinetic study, pH, initial concentration, dosage, mass ratio, photoreactor type and different water source parameters have been investigated. Results demonstrated a high removal efficiency of tetracycline by ZnO-3%SrO-2CdS of 98.8% within 120 min at pH 7 and dosage 10 mg. This high efficiency could be attributed to SrO channels that facilitate charge migration process and conserve electrons/holes with high redox power for reactive oxygen species production. Besides, the hydroponics study to examine the phytotoxicity of treated tetracycline solution reflected the effectiveness of the treating process since T. foenum-graecum seeds were germinated successfully in the treated tetracycline solution.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2019
·Vol. 6
·期 12
·3712-3722
·
IF 7.704
Yuanyuan Ding,Xue Bai,Zhengfang Ye,Dongqing Gong,Jiajing Cao,Zulin Hua
The environmental transformations of silver nanoparticles (AgNPs) are correlated with their behaviors and ecological risks. Humic acid (HA) is ubiquitous in natural water environments. However, the influence of HA on the environmental behavior, bioavailability, and toxicity of AgNPs is little known. This study investigated the processes of AgNP bioaccumulation in and toxicity to Lemna minor in an aquatic environment. AgNP effects were assessed in the presence of HA, which has been shown to interact with AgNP and modify its behavior and toxicity to organisms. Results showed that AgNP dissolution declined with the addition of HA. Carboxylate groups and C–O and C–O–C bonds were found to be involved in the HA and AgNP interaction, while XPS results suggested that HA caused Ag+ to be reduced to Ag(0). The addition of HA inhibited the absorption and accumulation of Ag in Lemna minor roots and leaves. When exposed to AgNP treatments alone, the plant morphology and ultrastructure were damaged by root atrophy and a reduction in vessel number and cross-sectional areas (CSAs) was observed. However, the addition of HA mitigated AgNP toxicity, resulting in no significant difference in the chlorophyll biomass and concentration between the AgNP–HA and unexposed treatment groups. The addition of HA was found to inhibit the generation of ROS and the depolarization of mitochondrial membrane potential (ΔΨm) caused by AgNPs in root cells. Overall, these results establish the mechanism of the effect of HA on AgNP behavior and highlight the influence of HA on the uptake and toxicity of AgNPs to Lemna minor.
研究领域:
环境科学
·
植物学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
·
2022
·Vol. 108
·期 6
·1033-1038
·
IF 2.807
Peng Lei,Xie Dongyu,Li Cui,Guo Qiang,Chen Chuansheng,Wang Qinghai
To evaluate combined effects of co-existed pesticides and nanomaterials on aquatic plants, the toxicity of herbicide atrazine (ATZ) on Iris pseudacorus in the presence and absence of Graphene oxide (GO) was investigated using chlorophyll a fluorescence transients. Results showed that GO reduced ATZ accumulation in plant. ATZ or ATZ combined with GO mainly blocked electron transport beyond Q A at PSII as indicated by the sharp rise of the J-step level of fluorescence rise kinetics. The pronounced increase in Fm and the loss of I-step were observed when ATZ was at 2.0 mg·L − 1 implying the damage on the oxygen evolution complex and PSI. GO at environmentally relevant concentration did not exhibit significant photosynthetic inhibitory effects on I. pseudacorus . GO at 1.0 mg·L − 1 promoted photosynthesis of I. pseudacorus under ATZ stress at 2.0 mg·L − 1 . These result indicated that the presence of GO alleviated the photosynthesis inhibition by ATZ at high levels.
研究领域:
环境科学
·
植物生理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Tao Ai,Mingling Yu,Yicheng Dai,Ruipu Yao,Ling N. Jin,Yuanyuan Yu,Xinbin Qiu,Peixin Huang,Xifen Zhu,Jianteng Sun,Lizhong Zhu
This study investigates the uptake, biotransformation, and phytotoxicity of sulfadiazine (SDZ) and its acetyl derivative N4-acetylsulfadiazine (NASDZ) in rice. Results showed that rice was more tolerant to NASDZ, with lower malondialdehyde and reactive oxygen species levels but higher antioxidant enzyme activities (SOD, POD, and CAT). The maximum accumulations of SDZ in roots and shoots were 19.3 ± 1.0 and 3.6 ± 1.1 μg/g, while NASDZ were 18.6 ± 2.5 and 3.5 ± 1.4 μg/g, respectively. SDZ exposure generated more metabolic intermediates, including deamination, hydroxylation, glycosylation, acetylation, and formylation products, while NASDZ metabolism was documented for the first time. Key genes involved in biotransformation include cytochrome P450, acetyltransferase, glycosyltransferases, and methyltransferase. Density functional theory calculations showed structural differences affecting reactive sites and intermediates. SDZ disrupted lipid metabolism, while NASDZ altered carbohydrate and amino acid pathways, highlighting their selective effects on rice metabolism. Our data help understand sulfonamide biotransformation and phytotoxicity in rice.
研究领域:
环境科学
·
植物生理学
·
毒理学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENT INTERNATIONAL
·
2022
·
IF 13.352
Liangliang Sun,Ping Zhang,Fei Liu,Qiong Ju,Jin Xu
Perfluorobutane sulfonate (PFBS) has oily and hydrophobic characteristics similar to those of perfluorooctane sulfonic acid (PFOS), which is an environmental organic pollutant and has gradually become the main substitute for PFOS in industry. Several studies have revealed the potential toxicity of PFBS in animals. PFBS can be taken up and accumulate in plants; however, whether and how PFBS affects plant growth remain largely unclear. A low concentration of PFBS did not affect plant growth, indicating that it had higher environmental safety than other perfluorinated compounds; however, a high concentration of PFBS (>1 mM) markedly inhibited primary root growth in Arabidopsis thaliana . Subsequently, we investigated the molecular mechanisms underlying plant growth mediated by high concentrations of PFBS. First, a genome-wide transcriptomic analysis revealed that PFBS altered the expression of genes associated with phytohormone signaling pathways. Combining physio-biochemical and genetic analyses, we next demonstrated that PFBS reduced the contents of indole-3-acetic acid (IAA) and abscisic acid (ABA), and disrupted the two signaling pathways in plants, finally inhibiting root growth. Moreover, a high concentration of PFBS also inhibited photosynthesis by comprehensively repressing the expression of genes related to the Calvin cycle and the photosynthetic apparatus. Such an understanding is helpful for elucidating the phytotoxicity of PFBS and provides a new strategy for toxicology research on organic pollutants in plants.
研究领域:
植物学
·
遗传学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
Plants-Basel
·
2020
·Vol. 9
·期 2
·245
·
IF 2.762
Shuang Zhang,Shi-Wei Sun,Hai-Lin Shi,Ke Zhao,Jin Wang,Yang Liu,Xiao-Hong Liu,Wei Wang
Isoliquiritigenin, a natural chalcone-type flavonoid, has been recognized as an allelochemical with phytotoxicity to lettuce; however, not enough attention has been paid to the mechanisms of this secondary metabolite. In this work, we investigated the physiological and biochemical mechanisms of isoliquiritigenin on lettuce seedlings. The results show that isoliquiritigenin has a concentration-dependent inhibitory effect on radicle elongation of lettuce seedlings, but no significant impact on lettuce germination. Microscopy analyses suggest that the surface morphology of lettuce radicle tips was atrophied and the intracellular tissue structure deformed at high concentrations. Isoliquiritigenin induced the overproduction of reactive oxygen species (ROS), which led to loss of cell viability in the radicle cells. In addition, malondialdehyde (a product of lipid peroxidation) and free proline levels were found to have increased, while chlorophyll content in lettuce seedlings decreased. All these changes suggest that the primary allelopathic mechanism of isoliquiritigenin by which it inhibits radicle elongation in lettuce seedlings might be due to the overproduction of ROS, which causes oxidative damage to membrane lipids and cell death.Keywords:isoliquiritigenin;phytotoxicity;Lactuca sativa;reactive oxygen species;cell viability;lipid peroxidation
研究领域:
植物学
·
生理学
·
生化与分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-10
·
IF 3.998
Ma Huiyan,Chen Yu,Chen Jinhui,Zhang Yunqiu,Zhang Tian,He He
Mikania micrantha and Ipomoea cairica are two invasive plants widely distribute and seriously damage in Hainan island. In this study, the leaves extracts of two weeds were collected and determined for their allelopathic potentials on Chrysanthemum coronarium . The phytotoxicity bioassay showed that when the extract concentration was 50 and 100 mg/ml, the inhibited effects of M. micrantha on growth of C. coronarium were greater than by I. cairica . However, when the extract concertation at 400 mg/ml, the opposite inhibited effects were observed. We speculated this phenomenon was caused by different allelopathic compounds. Therefore, using gas chromatography–mass spectrometry, 19 and 23 compounds were identified respectively, benzoic acid and cinnamic acid were the main components in the two leaves extracts, which were selected to carry out the further bioassays. Subsequent bioassay results showed the effects of two allelochemicals on morphological index and chlorophyll content and POD activity were all negative to C. coronarium , whereas the content of MDA and activity of SOD, CAT represented adverse changes. Moreover, the inhibitions by cinnamic acid were generally greater than those by benzoic acid. Thus, the phenolic acids played the most crucial roles in the allelopathic effccts of M. micrantha and I. cairica leaves extracts.
研究领域:
生态学
·
植物学
·
农学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）