Agronomy-Basel
·
2022
·Vol. 13
·期 1
·121
·
IF 3.949
Xiaoyun Huang,Hongxing Chen,Hui Chen,Chengwu Fan,Yueying Tai,Xiaoran Chen,Wang Zhang,Tengbing He,Zhenran Gao
The spatiotemporal heterogeneity of rice canopy leaves at different leaf positions is very important for non-destructive monitoring under Cadmium (Cd) stress, and is one of the key problems that need to be solved urgently in modern agriculture. This study aims to explore the temporal and spatial heterogeneity of chlorophyll content and fluorescence in rice canopy leaves under different Cd stress concentrations. The responses of the relative chlorophyll content (SPAD) and Chlorophyll fluorescence (ChlF) parameters to Cd stress in the tillering, heading, and filling stages were analyzed through pot experiments with three Cd concentrations: 0.20 mg·kg−1(CK), 0.60 mg·kg−1(Cd1), and 1.60 mg·kg−1(Cd2). Results showed that the canopy leaf SPAD value increased with increasing Cd concentration. Compared with CK, the leaf SPAD value in the Cd1 and Cd2 treatments were 1.91–3.45% and 5.52–12.01% lower, respectively. The SPAD value of the lower leaves was higher in the tillering stage, while the SPAD value of the upper leaves was higher in the heading and filling stages. The non-photochemical quenching coefficient (NPQ) of the third leaf (D3), the initial fluorescence yield (Fo) of the second leaf (D2), and the maximum photochemical efficiency (Fv/Fm) of photosystem II (PSII) in the tillering stage; the NPQ, Fo, and Fv/Fm of the D3 in the heading stage; and the NPQ, Fo, Fv/Fm, and Fv/Fm of the D2 in the filling stage were more sensitive to Cd stress than the other leaves and ChlF parameters.Keywords:cadmium;rice;relative chlorophyll content;chlorophyll fluorescence;photosynthesis
研究领域:
植物生理学
·
环境科学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Kewei Chen,Yunchang Li,Chunjie Zhou,Yuankai Wang,Zsolt Zalán,Tian Cai
Chlorophylls and β-carotene are fat-soluble phytochemicals in daily diets, while their bioaccessibility interaction remains unknown. Eight dietary chlorophylls and their derivatives (chlorophyll a , chlorophyll b , pheophytin a , pheophytin b , chlorophyllide a , chlorophyllide b , pheophorbide a , pheophorbide b ) were combined with β-carotene in six different oil matrices (corn oil, coconut oil, medium-chain triglycerides, peanut oil, olive oil and fish oil) and were subjected to in vitro digestion. Generally, chlorophylls significantly decreased β-carotene bioaccessibility by competitive incorporation into micelles. Dephytylated chlorophylls had a greater inhibitory effect on the micellarization and bioaccessibility of β-carotene compared to phytylated chlorophylls. In their co-digestion system, olive oil group exhibited the smallest particle size and biggest zeta potential in both digesta and micelles. For chlorophylls, the phytol group and their levels are key factors, which was also buttressed by the mice model where additional supplementation of pheophorbide a significantly hindered the accumulation of β-carotene and retinoids compounds.
研究领域:
营养学
·
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2025
·Vol. 18
·期 11
·e202402588
·
IF 6.6
Shengnan Duan,Teng Gu,Chiasa Uragami,Shin-ichi Sasaki,Yuanqi Zhou,Ruohan Tao,Xianju Zhou,Chunbao Feng,Hitoshi Tamiaki,Xiao-Feng Wang,Zeyun Xiao,Hideki Hashimoto
Graphical A layered cascade bio-solar cell inspired by artificial photosynthesis is constructed using chlorophyll (Chl) and bacteriochlorophyll derivatives (BChl) to emulate PSI and PSII, respectively. Sub-ns TAS reveals a prolonged charge transfer state from BChl to Chl (Chl – /BChl + ), compared to the reverse (Chl + /BChl – ). This confirms the biomimetic device effectively replicates the natural photosynthetic electron transfer mechanism. The natural Z-scheme of oxygenic photosynthesis efficiently drives electron transfer from photosystem II (PSII) to photosystem I (PSI) via an electron transport chain, despite the lower energy levels of PSII. Inspired by this sophisticated mechanism, we present a layered cascade bio-solar cell (CBSC) that emulates the Z-scheme. In this design, chlorophyll derivatives (Chl) act as PSI analogs, while bacteriochlorophyll derivatives (BChl) serve as PSII analogs in the active layer. The resulting photocurrent, prominently detected in the near-infrared region, is validated through external quantum efficiency measurements. Sub-nanosecond transient absorption spectroscopy reveals a prolonged charge transfer (CT) state from BChl to Chl (Chl – /BChl + species) compared to the reverse direction (Chl + /BChl – species). This asymmetry highlights a dominant electron flow from BChl (PSII analog) to Chl (PSI analog) under simultaneous excitation, effectively replicating the natural Z-scheme electron transfer. These findings represent a significant advance in the design of bio-inspired solar cells, paving the way for artificial photosynthesis systems and offering profound insights into improving photovoltaic theory and efficiency.
研究领域:
生物化学
·
光合作用
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Jingqian Xie,Wei Tang,Lu Zhao,Shuren Liu,Kai Liu,Weiping Liu
Napropamide is a chiral acetamide herbicide commonly applied to control Echinochloa crus-galli in maize. The inhibition effect may be enantioselective for Echinochloa crus-galli and maize. It may also be affected by the potential allelopathy at field condition. To investigate this, we have examined the inhibition effect of napropamide on Echinochloa crus-galli mono-cultured or co-cultured with maize at field conditions. Our results on morphology, physiology, chlorophyll content and chlorophyll fluorescence suggest that R -napropamide has stronger inhibitory effect than Rac -napropamide and S -napropamide on Echinochloa crus-galli , while none of them affects maize. We found that both glutathione- S -transferase (GST) genes and oxidative enzymes (superoxide dismutase, malondialdehyde) played roles in the inhibition. Accumulations of napropamide in Echinochloa crus-galli were more prominent in roots than in shoots, and no enantioselectivity was found in medium dissipation. We have observed relative allelopathy when applying napropamide to Echinochloa crus-galli co-cultured with maize. The results warrant further field studies on the enantioselectivity and allelopathy of herbicides.
研究领域:
农学
·
植物生理学
·
杂草科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Meiling Wang,Guowen Meng,Qing Huang
A prototype of environmentally friendly and low-cost fluorescence sensor, consisting of spinach-extracted chlorophyll- a modified alkali-treated peanut shell (denoted as chlorophyll- a @peanut shell), is achieved and used for trace detection of Hg 2+ in aqueous solutions through fluorescence quenching method. The chlorophyll- a @peanut shell exhibits a linear dynamic detection range from 0 to 19 × 10 −8 M for Hg 2+ with a detection lower limit of 8.5 × 10 −9 M. The feasibility of sensitive and selective detection of Hg 2+ using the chlorophyll- a @peanut shell is also demonstrated in the test of Hg 2+ in synthetic polluted lake waters, showing excellent anti-interference ability to common impurities like silt and alga. Further experiments demonstrate that the improved sensing property of the chlorophyll- a @peanut shell for Hg 2+ than that of chlorophyll- a in solution is ascribed to the selective Hg 2+ adsorption of the alkali-treated peanut shell, which might also be used for the remediation of Hg 2+ in polluted waters. The design concept using non-toxic plants may open a new door to the environmentally friendly and low-cost materials for detection and remediation of environmental pollutants .
研究领域:
环境科学
·
生物化学
✓ 已验证
DOI
高影响因子
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2018
·Vol. 121
·期 4
·1800078
·
IF 2.2
Xue Li,Ruinan Yang,Chunling Lv,Lin Chen,Liangxiao Zhang,Xiaoxia Ding,Wen Zhang,Qi Zhang,Chundi Hu,Peiwu Li
The residues of chlorophyll induce oxidative rancidity and deterioration through photo-oxidation. However, the effect of chlorophyll on the quality of rapeseed oil is still unknown. In this study, chlorophyll is added into rapeseed oil to reach the desired treatment levels of 2, 5, and 10 mg kg −1 , while no chlorophyll is added in the control sample. Dynamic changes of the peroxide value of rapeseed oils with different chlorophyll contents exposed to light and stored in the dark at different times (0, 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, and 60 days) are investigated. The results show that the peroxide value of rapeseed oil exposed to light increased significantly, especially for the oil with a high content of chlorophyll. In contrast, the peroxide value of rapeseed oil stored in the dark is nearly unchanged no matter whether extra chlorophyll is added. This study shows that chlorophyll in rapeseed oil can trigger oil oxidation, and therefore it is necessary to take measures to reduce the chlorophyll content in rapeseed oil or store rapeseed oil in the dark as soon as possible. Practical Applications : This study shows that chlorophyll in rapeseed oil can trigger oil oxidation, and therefore it is necessary to take measures to reduce the chlorophyll content in rapeseed oil. In this study, dynamic changes of peroxide values of rapeseed oils with different chlorophyll contents exposed to light and stored in the dark at different times are investigated. The results show that the peroxide value of rapeseed oil exposed to light increases significantly, especially for the rapeseed oil with a high content of chlorophyll. In conclusion, chlorophyll in rapeseed oil can trigger oil oxidation.Therefore, it is necessary to take measures to reduce the chlorophyll content in rapeseed oil or store rapeseed oil in the dark as soon as possible.
研究领域:
食品科学
·
植物化学
✓ 已验证
产品关联
DOI
高影响因子
AQUACULTURE
·
2019
·
IF 3.022
Qian Zhao,Juanjuan Chen,Si Zhu,Xiao Liu,Bin Ma,Chunde Wang,Jilin Xu,Xiaojun Yan
Two new scallop strains, the ‘QN Orange’ scallop and the ‘Bohai Red’ scallop, were selected from the hybrid cohort between the bay scallop ( Argopecten irradians irradians ) and the Peruvian scallop ( Argopecten purpuratus ) to improve the bay scallop stock, which has suffered from significant inbreeding depression characterized by poor growth and high mortality. Although both strains were originated from the same hybrid cohort, the ‘QN Orange’ scallops possess orange adductor muscles while the ‘Bohai Red’ scallops have white adductor muscles. To explore the pigment profiles of adductor muscle coloration in these two scallop strains, an optimized method based on liquid chromatography coupled with triple quadrupole mass spectrometry (HPLC-QqQ-MS) with atmospheric pressure chemical ionization (APCI) was established to determine chlorophyll (chlorophyll a and chlorophyll b ) and carotenoids (including α-carotene, β-carotene, ε-carotene, γ-carotene, ζ-carotene, lutein , fucoxanthin , zeaxanthin , canthaxanthin , pectenoxanthin, and pectenolone). The results showed that the total contents of carotenoids in the adductor muscle, gill, and mantle of ‘QN Orange’ scallops were 82.68, 105.49, and 100.49 μg g −1 , which were 49.88, 3.26, and 4.18 times higher than those in the ‘Bohai Red’ scallops, respectively. In particular, the contents of the pigments pectenolone, pectenoxanthin, fucoxanthin, zeaxanthin, and lutein in the ‘QN Orange’ scallops were 171.58, 61.67, 3.87, 22.16 and 23.27 μg g −1 , which were 6.92, 3.38, 27.64, 15.75, and 13.00 times higher than those in the ‘Bohai Red’ scallops, respectively. These results suggest that the orange coloration in the ‘QN Orange’ scallops might be caused by the accumulation of carotenoids.
研究领域:
海洋生物学
·
食品科学
·
分析化学
✓ 已验证
DOI
高影响因子
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
·
2022
·Vol. 109
·期 3
·450-458
·
IF 2.807
Li Jing,Yao Youru,Hu Xin,Wang Juan,Yin Li,Zhang Yong,Ni Lixiao,Li Shiyin,Zhu Fengxiao
Cyanobacteria harmful algal blooms (CyanoHABs) are a global concern. Application of allelochemicals is a promising solution for cyanobacteria control, due to its high efficiency, low cost and ecological safety. Flavonoids (natural polyphenols produced by aquatic plants) are reported capable of effectively inhibiting the growth of algae; however, the molecular mechanism of algae chlorophyll inactivation is still unclear. In this study, quercetin was used as a typical flavonoid, to investigate the inactivation effect of allelochemical on Microcystis aeruginosa chlorophyll a. The absorption and fluorescence spectra showed that chlorophyll reacted with quercetin to form pheophytin, and the formation rate of pheophytin increased with increasing quercetin concentration (1 × 10 –5 –1 × 10 –2 M). FTIR spectra and DFT calculation showed that Mg 2+ complexed with the 3-OH and 4-C = O groups in the quercetin ring C so that chlorophyll was inactivated due to the loss of Mg 2+ ions. Overall, this study revealed that quercetin inactivated chlorophyll a of cyanobacteria by capturing Mg 2+ ions, providing insights into the molecular mechanisms of algal bloom control by allelochemicals.
研究领域:
环境科学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yingjuan Chen,Yuxin Han,Shiqiang He,Qinghua Cheng,Huarong Tong
Albino tea cultivars with distinct leaf colors have rarely been used to explore the metabolic mechanism of leaf color formation. Carotenoids and chlorophyll a re primary pigments affecting leaf color with differential metabolic mechanisms in albino tea resources. TEM analysis showed that in albino stage, much less chloroplasts with abnormal structure were observed in white and yellow tea leaves, which corresponded to the significant reduction of total chlorophyll, Chl a and Chl b, and increase of Chl a/b, resulting in tea leaves to lose their green color. Compared to green tea ‘Fudingdabaicha’ (FD), three albino tea cultivars had higher number of carotenoids, but much lower contents. For albino mutants, significant lower α-Carotene, α-cryptoxanthin and lutein involved in lutein biosynthesis and remarkable higher zeaxanthin ( P < 0.05) were responsible for the leaf yellowing of ‘Huangjinya’ (HJY), while zeaxanthin degradation and accumulation of antheraxanthin, violaxanthin and neoxanthin contribute to the white appearance of ‘Jibai’ (JB).
研究领域:
植物生理学
·
代谢组学
·
茶叶科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2020
·
IF 4.032
Yansong Liu,Yingbin Guo,Yuanlin Ren,Yang Wang,Xun Guo,Xiaohui Liu
In order to develop a kind of color-fasten and durable flame retardant wool fibers , the green and environmentally friendly dye, i.e. sodium copper chlorophyll (SCC) was firstly used to dye the wool fibers, then the dyed wool fibers (DW) was phosphorylated with phosphoric acid to obtain flame retardant wool fibers (FR-W). The results show that FR-W has good color fastness, and the limiting oxygen index (LOI) of FR-W is still as high as 29.6% after 50 times washing, indicating excellent durable flame retardant performance. The char residue of FR-W at 800 °C under air atmosphere is 27 wt%, showing good char forming ability. Compared to the control sample, the peak of heat release rate (pHRR) of FR-W decreases by 65% and the total heat release (THR) of FR-W decreases from 5.2 MJ/m 2 to 4.8 MJ/m 2 . The SCC combined with phosphate groups play the role of gas and condensed phase flame retardant mechanism.
研究领域:
材料科学
·
纺织工程
·
化学工程
✓ 已验证
DOI
高影响因子
Applied Sciences-Basel
·
2021
·Vol. 11
·期 19
·9127
·
IF 2.679
Tianji Liu,Yitong Wang,Junguo Li,Qing Yu,Xiaoman Wang,Di Gao,Fuping Wang,Shuang Cai,Yanan Zeng
The effects of Ca2+in converter slag and electric arc furnace slag leaching solutions on CO2content, the effects of CO2content in solutions on the accumulation of chlorophyll a ofNannochloropsissp., and the mechanisms were studied. Results showed that addition of 50 mg/L converter slag leaching solution and 400 mg/L electric arc furnace slag leaching solution (lower than 50 vol% concentration) promoted the accumulation of chlorophyll a ofNannochloropsissp., while an increased concentration of 70 vol% inhibited its accumulation. The highest concentration of chlorophyll a was obtained on the addition of 10 vol%. With 10 vol% leaching solutions added, chlorophyll a concentration for converter slag reached 4.2 mg/L, 1.45 times as much as that of pure F/2 medium, and chlorophyll a concentration for electric arc slag reached 3.2 mg/L, 1.10 times as much as that of pure F/2 medium. Under the same addition proportion, the promoting or inhibiting effect from converter slag on the accumulation of chlorophyll a ofNannochloropsissp. was more obvious than that for electric arc furnace slag. The reason for the promotion of chlorophyll a accumulation ofNannochloropsissp. was that an increase of Ca2+in the solutions led to an increase of CO2, thereby promoting the photosynthetic rate of microalgae. The study provided new ideas for the green application of solid waste and industrial production of microalgae.Keywords:leaching solutions;converter slag;electric arc furnace slag;Nannochloropsissp.;chlorophyll a;CO2content
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Materials
·
2022
·Vol. 65
·期 6
·1512-1521
·
IF 8.64
Lv Zunyan,Meng Linxing,Cao Fengren,Li Liang
Dull surface oxygen evolution reaction (OER) dynamics seriously hinders the application of BiVO 4 (BVO) photoanodes in photoelectron-chemical (PEC) water splitting. In this study, we built an inorganic/organic hybrid photo-anode to improve the PEC performance of BVO by covering a multifunctional film. The film contains modified chlorophyll (Chl) organic compounds and Co and Si ions with a gradient distribution. The Co ions present at the interface between BVO and Chl promote the transport of photogenerated holes, and the Si ions on the surface of the photoanode enhance the hydrophilicity of PEC cells. This modified Chl film not only reduces the OER barrier and promotes carrier transfer but also inhibits loss of vanadium and increases the stability of the BVO photoanode. Finally, the modified BVO photoanode exhibits a photocurrent density of 5.1 mA cm −2 at 1.23 V RHE (RHE: reversible hydrogen electrode), and the onset potential moves 350 mV negatively in 0.5 mol L −1 Na 2 SO 4 . This article provides a general and simple surface hybrid inorganic/organic solution to improve the catalytic ability of photoanodes.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）