Biomed Research International
·
2018
·
IF 2.583
Guan-Xi Li,Xiao-Qin Wu,Jian-Ren Ye,He-Chuan Yang
The objective of this study was to investigate whether plant-bacteria interaction affects the secretion of organic acids by both organisms and to assess whether the production of IAA by the bacterium increases the secretion of organic acids by root exudates, and if the stress produced by low available phosphorus (P) affects the production of organic acids by bacteria, by roots, or by root exudates in presence of bacterial cultures. With this purpose, we used as a biological model poplar plants and one strain of Burkholderia multivorans able to solubilize P. High performance liquid chromatography was utilized to measure organic acids. The tests, the inductive effects of exogenous indole-3-acetic acid (IAA) on secretion of organic acids, the 2 × 4 × 2 factorial design experiment, and the ability of organic acids to solubilize tricalcium phosphate were performed to investigate the interactive effects. The results showed that, after B. multivorans WS-FJ9 interacted with the poplar root system, the key phosphate-solubilizing driving force was gluconic acid (GA) which was produced in three ways: (1) secreted by the root system in the presence of IAA produced by B. multivorans WS-FJ9; (2) secreted by B. multivorans WS-FJ9; and (3) secreted by the poplar root system in the presence of phosphorus stress. When phosphorus stress was absent, the GA was produced as outlined in (1) and (2) above. These results demonstrated that inoculating B. multivorans WS-FJ9 into the poplar root system could increase the amount of GA secretion and implied that the interaction between B. multivorans WS-FJ9 and the poplar root system could contribute to the increase of P available fraction for poplar plants.
研究领域:
植物学
·
微生物学
·
土壤科学
✓ 已验证
DOI
PubMed
高影响因子
Forests
·
2023
·Vol. 14
·期 4
·783
·
IF 2.9
Lulu Gao,Aoying Zhang,Shanchun Yan
Heavy metals are serious pollutants that affect the growth and disease resistance of woody plants. Herein, the enrichment characteristics of an essential element (Zn) inPopulus simoniiseedlings, as well as the effects of Zn stress on seedling growth and resistance to leaf rust, were investigated. Zn contents in roots, stems, and leaves of treatment groups were significantly increased. Zn stress at all concentrations significantly inhibited the biomass of seedlings. Under the low, middle, and high Zn treatments, compared with the control group, CAT activity significantly decreased by 36%, 21%, and 14%; SOD activity significantly decreased by 13%, 8%, and 5%; PPO activity significantly decreased by 27%, 31%, and 47%; TI activity significantly decreased by 48%, 55%, and 61%, and CI activity significantly decreased by 10%, 20%, and 14%, respectively. In the natural environment, we accidentally discovered thatP. simoniiwas infected with leaf rust, and Zn stress significantly increased the rust disease index. The disease index correlated positively with Zn content in leaves and negatively with the chemical defense indexes. Taken together, Zn stress causes a strong growth toxicity inP. simoniiseedlings, and the reduced chemical defense under Zn stress increases the susceptibility of seedlings to leaf rust.Keywords:essential element;Populus simonii;growth;chemical defense;leaf rust
研究领域:
环境科学
·
植物病理学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Hong Liao,Wenjun Ying,Zhina Lian,Yong Xu,Junhua Zhang
Acid salts have been shown to catalyze xylan hydrolysis selectively and efficiently for xylooligosaccharides (XOS) production while using acid salts that are non-toxic and available as feed additives can avoid separation from resulting XOS-rich hydrolysates. There is no report on XOS production with sodium bisulfate (NaHSO 4 ) hydrolysis, of significance is that NaHSO 4 as feed additive does not need to be separated. In this work, NaHSO 4 hydrolysis was firstly employed to produce XOS from poplar. XOS yield of 42.7% was reached under optimal conditions of 0.04 mol/L NaHSO 4 , 170 °C and 60 min. After hydrogen peroxide/acetic acid and sodium hydroxide treatments of NaHSO 4 -pretreated poplar, high yields of glucose (92.0%) and xylose (91.3%) were obtained at a low cellulase dose of 5 FPU/g dry mass. NaHSO 4 hydrolysis was a novel strategy to prepare XOS efficiently with simple operation steps, and XOS-rich hydrolysates could be potentially used as feed additives without NaHSO 4 separation.
研究领域:
生物化学
·
可再生资源与环境工程
✓ 已验证
DOI
PubMed
高影响因子
Acta Ecologica Sinica
·
2011
·
IF 0
Defu Chi,Xiaocan Li,Jia Yu,Xing Xie,Guangli Wang
In order to investigate the effect of organic volatiles from poplar species on the host plants orientation of Saperda populnea , the essential oil in the 2–3 years old branches from the sapling or mature trees of Populus simonii Carr. and P. simonii Carr. × P. nigra L. were extracted using the steam distillation method. The chemical composition and relative content in essential oil from those branches was analyzed by GC–MS. The main components contained in those volatiles from the four kinds of branches are mainly aromatic compounds such as 1,2 - cyclohexanedione, 2 - cyclohexene - 1 - one, p - xylene and 1,2,3 - trimethylbenzene and so on. The relative content of aromatic compounds contained in branches from saplings was higher than that contained in branches from old tress. EAG response and behavioral reaction of S. populnea L. to those four kinds of distillated essential oil were tested. The results shown that male and female adults of S. populnea L. shown significant choice behavior and strong olfactory response to those essential oil distillated from branches of P. simonii Carr. and P. simonii Carr. × P. nigra L.. The EAG bioassay of S. populnea L. to 10 kinds of monomers compounds which had relative higher contents was tested. The results shown that the EAG response of female adults of S. populnea L. to 1 mol L −1 p-xylene was intensest and reached 1.027 mV, the strength of their EAG response to 0.1 mol L −1 phenol took the second place. The EAG response of male adult of S. populnea L. to 1 mol L −1 p-xylene was strongest and reached to 0.824 mV, the strength of their EAG response to 1 mol L −1 salicylaldehyde took the second place. In the choice behavior test of S. populnea L. adult to monomeric compound carried out in ‘Y’ type olfactometer have found that female and male adult of S. populnea L. all appeared obvious positive taxis to 0.1 mol L −1 p-xylene. The selection rate of female and male adults ware (76.7 ± 4.1)% and (71.7 ± 2.6)%, respectively. The selective reaction to 0.1 mol L −1 1,2-cyclohexanedione and 2-cyclohexene-1-one were not obviously than that to 0.1 mol L −1 p-xylene. The male and female adult of S. populnea L. appeared repelling behavior to 0.1 mol L −1 salicylaldehyde.
研究领域:
昆虫学
·
植物化学
✓ 已验证
DOI
Forests
·
2021
·Vol. 12
·期 2
·127
·
IF 2.634
Qiangqiang Liu,Haojia Du,Wenhua Lyu
In order to improve the performance of soft plantation wood, an environmentally friendly wood modifier was developed. First, using urea and melamine as crosslinking agents, the glucose-urea-melamine resin (MUG) was prepared with glucose under the catalysis of inorganic acid and metal ions. Then MUG, sodium silicate, and distilled water were mixed and stirred at 40 °C to prepare MUG resin/sodium silicate compound modifier (G20S10, G10S20, the subscript number represents the mass percentage of the component in the solution.). Then plantation poplar wood (Populus tomentosa) was impregnated and modified with them. Their physical and mechanical properties were tested and compared with those of the wood treated with sodium silicate of 20% mass fraction (S20). Infrared analysis showed that the amino resin characteristic structure (CO-NH-) existed in MUG, and the absorption peak of the furan ring (C=C) appeared. Compared with S20modified wood, the shrinkage degree of G10S20or G20S10modified wood is reduced, their moisture absorption is decreased, and their dimensional stability is improved. MUG resin/sodium silicate compound modifier can effectively enhance the wood’s density, modulus of elasticity, modulus of rupture, and compression strength. SEM analysis showed that there were columnar and granular solid substances attached to the cell wall, cell lumen, intercellular space, and vessel of G20S10modified wood. EDX showed that the number of Si elements on the cell wall was significantly increased compared with the control, indicating that the modifier effectively entered the wood cell wall. The G20S10can greatly improve the wood’s physical and mechanical properties through an organic–inorganic compound synergistic effect. It is a green, non-formaldehyde, low cost wood modifier with broad application prospects.Keywords:poplar;glucose resin;sodium silicate;impregnation modification;wood properties
研究领域:
林学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Minerals
·
2022
·Vol. 12
·期 6
·665
·
IF 2.818
Xiaofang Zhang,Yuhuan Li,Yang He,Debin Kong,Bern Klein,Shenghua Yin,Hongyu Zhao
Adsorption with activated carbon (AC) is an important method for the treatment of heavy metal wastewater, but there are still certain challenges in the separation and reuse of activated carbon. The preparation of magnetic activated carbon (MAC) by modifying AC is one of the effective means to realize the separation of AC from solution after the adsorption process. In this work, lignite and poplar leaves were used as raw materials for co-pyrolysis, and the co-pyrolysis char was activated and modified to prepare MAC. The structure and properties were characterized by VSM, N2adsorption, SEM, XRD, and FT-IR. At the same time, the adsorption performance of MAC on wastewater containing Pb and Cd ions was studied. The results show that the prepared MAC contains Fe3O4, and the saturation magnetization (Ms) of the MAC is 13.83 emu/g; the specific surface area of the MAC is 805.86 m2/g, and the micropore volume is 0.23 cm3/g; the MAC exhibited a good porous structure. When the pH value of the solution was 5, the adsorption time was 120 min, the dosage of MAC was 4 g/L, the initial concentration of Pb ion solution was 50 mg/L, and that of Cd ion solution was 25 mg/L, and the adsorption temperature was 30 °C, the adsorption efficiency of Pb, Cd ions were 84.40 and 78.80%, respectively, and the adsorption capacities were 10.55 and 4.93 mg/g, respectively. The adsorption of Pb and Cd ions by MAC conforms to the Langmuir adsorption model, which is a monolayer adsorption. The adsorption process is mainly chemical adsorption, which can be better described by the pseudo-second-order model. The adsorption thermodynamic analysis showed that the adsorption of Pb and Cd ions by MAC was a spontaneous reaction, and the higher the temperature, the stronger the spontaneity.Keywords:lignite;poplar leaves;magnetic activated carbon;heavy metal ions;adsorption mechanism
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yajun Hou,Shanshan Wang,Baojuan Deng,Yun Ma,Xing Long,Chengrong Qin,Chen Liang,Caoxing Huang,Shuangquan Yao
As an environmentally friendly lignocellulosic biomass separation technology, hydrothermal pretreatment (HP) has a strong application prospect. However, the low separation efficiency is a main factor limiting its application. In this study, the poplar components were separated using HP with ferric chloride and pH buffer (HFB). The optimal conditions were ferric chloride concentration of 0.10 M, reaction temperature of 150 °C, reaction time of 15 min and pH 1.9. The separation of hemicellulose was increased 34.03 % to 77.02 %. The pH buffering resulted in the highest cellulose and lignin retention yields compared to ferric chloride pretreatment (FC). The high efficiency separation of hemicellulose via HFB pretreatment inhibited the degradation of xylose . The hydrolysate was effectively reused for five times. The fiber crystallinity index reached 60.05 %, and the highest C/O ratio was obtained. The results provide theoretical support for improving the efficiency of HP and promoting its application.
研究领域:
生物质能
·
林业工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 9
·2024
·
IF 4.2
Xia Wang,Fanyuan Kong,Wulan Zeng,Huaxiang Zhang,Chunling Xin,Xiangjun Kong
Every late autumn, fluttering poplar leaves scatter throughout the campus and city streets. In this work, poplar leaves were used as the raw material, while H3PO4and KOH were used as activators and urea was used as the nitrogen source to prepare biomass based-activated carbons (ACs) to capture CO2. The pore structures, functional groups and morphology, and desorption performance of the prepared ACs were characterized; the CO2adsorption, regeneration, and kinetics were also evaluated. The results showed that H3PO4and urea obviously promoted the development of pore structures and pyrrole nitrogen (N–5), while KOH and urea were more conductive to the formation of hydroxyl (–OH) and ether (C–O) functional groups. At optimal operating conditions, the CO2adsorption capacity of H3PO4– and KOH–activated poplar leaves after urea treatment reached 4.07 and 3.85 mmol/g, respectively, at room temperature; both showed stable regenerative behaviour after ten adsorption–desorption cycles.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 37
·21566-21571
·
IF 3.049
Weihua Zou,Delin Sun,Zhangheng Wang,Ruoyao Li,Wenxuan Yu,Pingfang Zhang
Farmed poplar could meet the human demand for transparent wood-based composites to replace glass, avoiding the consumption of natural forest resources. We removed the lignin of poplar using a potassium hydroxide (KOH) and deionized water solution, the waste black liquor could be converted into compound potassium fertilizer after being neutralized by phosphoric acid. Polyurethane (PU) was then added to the lignin-stripped poplar and hardened, the transparent poplar-based composite (TPC) has stable transparency at high temperatures, and flexibility – it elongates (about 15%) before breaking. These properties could provide more uses in hot environments requiring a flexible shape. The TPC PU provides transmittance of 85%, haze of 83%, and anisotropic light diffraction.
研究领域:
材料科学
·
林业工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 2
·393
·
IF 3.2
Hongyan Zhu,Xinyu Li,Shijie Li,Ximing Wang,Yabo Ma,Jin Zhang,Yunpeng Ren,Jianguo Zhao
Desalinating seawater is a crucial method for addressing the shortage of freshwater resources. High-efficiency, low-cost, and environmentally friendly desalination technologies are key issues that urgently need to be addressed. This work usedPopulus tomentosa Carr.as a matrix material and preparedPopulus tomentosa Carr.@Fe-GA through a complexation reaction to enhance the water evaporation rate and photothermal conversion efficiency of seawater desalination. The concentration of the impregnation solution was further refined, and the bonding mechanism along with the thermal stability of the composite photothermal material was investigated, including an assessment of their photothermal conversion efficiency. The research results indicate that the evaporation rate of water in a 3.5% NaCl solution forPopulus tomentosa Carr.@Fe-GA under light intensity conditions of one sun reached 1.72 kg·m−2·h−1, which was an increase of 44.5% compared to untreatedPopulus tomentosa Carr.It achieved a photothermal conversion efficiency of 95.1%, an improvement of 53.6% over untreatedPopulus tomentosa Carr., and maintained stability and high evaporation performance (95.4%) even after prolonged rinsing. This work realizes the functional utilization of seawater desalination withPopulus tomentosa Carr.and offers a novel approach for the development and use of wood-derived photothermal material.
研究领域:
材料科学
·
环境科学
·
林业工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Wei Tang,Xinyue Wang,Ziqin Hua,Li Zhang,Yucai He
Utilizing hydrogen peroxide (H 2 O 2 ) and acid medium for oxidation-reduction reaction to facilitate the efficient biorefining of lignocellulose is the ultimate goal of oxidative pretreatment . Here, the p-toluenesulfonic acid (TsOH) was employed in the H 2 O 2 pretreatment of poplar, which has achieved excellent depolymerizing effect of lignin and xylan . The results displayed that 99.9% xylan and 68.4% lignin were dramatically removed when 2% H 2 O 2 and 40 g/L TsOH were introduced to the pretreatment (HTP) at 160 °C. After enzymatic hydrolysis and simultaneous saccharification and fermentation, the enzymatic hydrolysis efficiency and ethanol yield of poplar were advanced by 59.0% and 59.4%, respectively. The structural characterization indicated that the incremental efficiency was attributed to the advantageous accessibility, surface area , crystallinity, and crystal size of poplar by HTP’s augmentative removal of non-cellulosic components. This work expanded the application of acidic H 2 O 2 pretreatment and suggested that HTP was a synergistic and feasible way in biorefinery.
研究领域:
生物化学
·
生物质能
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Wei Ge,Linxuan Zhang,Fanli Meng,Chengming Tian
Poplar anthracnose caused by Colletotrichum gloeosporioides is one of the major forest diseases worldwide, causing incalculable losses in forestry production every year. In this study, an endophytic bacterium with significant antagonistic activity against C. gloeosporioides was isolated from Populus canadensis leaves, identified and named Pseudomonas atacamensis GZ-3. The specific biological functions of strain GZ-3 were analyzed using whole genome sequencing. The volatile organic compounds (VOCs) produced by strain GZ-3 had good antifungal activity against C. gloeosporioides . These VOCs could effectively inhibit mycelial growth and conidial germination of C. gloeosporioides . In addition, metabolomics analysis revealed that VOCs could help poplar resist infection of C. gloeosporioides by inducing the synthesis of flavonoids in poplar. 3-methyl-1-butanol and 2-heptanone were the main antifungal compounds in VOCs. Therefore, Pseudomonas atacamensis GZ-3 had good potential for biocontrol. This study provided a new strategy for the biological control of poplar anthracnose.
研究领域:
植物病理学
·
微生物学
·
森林保护学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）