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Journal of Environmental Sciences 2012年第2期24卷 214-220页

作者： Chengrun Wang Kegui Zhang Mei He Chuanjun Jiang Liumin Tian Yuan Tian XiaorongWang School of Life Science Huainan Normal University Huainan 232001 China. State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Nanjing 210093 China Department of Agricultural and Biological Engineering University of Florida Gainesville FL 32611 USA

Effects of mineral nutrient imbalance,DNA lesion and DNA-protein crosslink on growth of Vicia faba *** hydroponically cultivated in concentrations of extraneous lanthanum（La） for 20 days were investigated in the present *** results showed that contents of La,Cu or K elements in roots generally changed synchronously with those in leaves,while Ca,Fe,Zn,Mg,Mn or P in the roots altered inversely to those in the ***,the extraneous La led to redistribution and imbalance of mineral nutrient elements in the roots and *** lesion and DNA-protein crosslink were investigated by single cell gel electrophoresis（SCGE） and sodium dodecyl sulfate/potassium（SDS/K＋） precipitation methods,*** results demonstrated that the increasing La induced DNA break and DNA-protein crosslinks（DPCs） in the *** results suggested that mineral nutrient imbalance,DNA lesion and DNA-protein crosslink were involved in the growth retardation and growth alteration of the seedlings,which may help to understand the mechanisms of rare earth elements（REEs） on plant growth.

关键词： rare earth elements mineral nutrient single cell gel electrophoresis DNA lesion DNA-protein crosslinks

Response mechanism of Chlamydomonas reinhardtii to nanoscale bismuth oxyiodide(nano-BiOI):Integrating analysis of mineral nutrient metabolism and metabolomics

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Journal of Environmental Sciences 2022年第11期34卷 13-24页

作者： Yan Huang Jinlong Lai Yang Huang Xuegang Luo Xu Yang Zewei Liu Yue Duan Chen Li School of Life Sciences Southwest University of Science and TechnologyMianyang 621010China College of Environment and Resources Southwest University of Science and TechnologyMianyang 621010China Laboratory of Solid Waste Treatment and Resource Recycle Ministry of EducationMianyang 621010China College of Chemical and Environment Science Shaanxi University of TechnologyHanzhong 723000China

Nanoscale bismuth oxyiodide(nano-BiOI) is widely studied and applied in environmental applications and biomedical fields, with the consequence that it may be deposited into aquatic environments. However, the impact of nano-Bi OI on aquatic ecosystems, especially freshwater microalga, remains limited. Herein, the nano-Bi OI was synthesized and its response mechanism towards microalga Chlamydomonas reinhardtii was evaluated. Results showed that a low concentration of nano-Bi OI(5 mg/L) could stimulate algal growth at the early stage of stress. With the increase in concentration, the growth rate of algal cells was inhibited and showed a dose effect. Intracellular reactive oxygen species(ROS) were significantly induced and accompanied by enhanced lipid peroxidation, decreased nonspecific esterase activity, and significantly upregulated glutathione S-transferase activity(GST) activity. mineral nutrient metabolism analysis showed that nano-Bi OI significantly interfered with the mineral nutrients of the algae. Non-targeted metabolomics identified 35 different metabolites(DEMs, 22 upregulated, and 13 downregulated) under 100 mg/L Bi OI *** pathway analysis demonstrated that a high concentration of nano-Bi OI significantly induced metabolic pathways related to amino acid biosynthesis, lipid biosynthesis,and glutathione biosynthesis, and significantly inhibited the sterol biosynthesis *** finding will contribute to understanding the toxicological mechanisms of nano-Bi OI on C. reinhardtii.

关键词： Chlamydomonas reinhardtii Nano-BiOI mineral nutrient Metabolomics

Interaction of salinity and cadmium stresses on mineral nutrients, sodium, and cadmium accumulation in four barley genotypes

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第7期8卷 476-485页

作者： HUANG You-zong WEI Kang YANG Juan DAI Fei ZHANG Guo-ping Agronomy Department Zhejiang University Hangzhou 310029 China College of Agriculture Guangxi University Nanning 530004 China

Interaction of salinity （NaCI） and cadmium （Cd） on growth, mineral nutrients, Na and Cd accumulation in four barley genotypes differing in salt tolerance was studied in a hydroponic experiment. Cd, NaCI and their combined stresses reduced Ca and Mg concentrations in roots and shoots, K concentration in shoots, increased K and Cu concentrations in roots relative to control, but had non-significant effect on micronutrients Cu, Fe and Mn concentrations in shoot. The three stresses reduced accumulation of most tested nutrients in both roots and shoots, except NaCI and NaCl＋Cd stresses for root K and shoot Cu accumulation in salt tolerant genotypes. The salt tolerant genotypes did not have higher nutrient concentration and accumulation than the sensitive ones when exposed to Cd and NaCI stresses. In conclusion, the affecting mechanism of Cd stress on nutrients was to some extent different from salinity stress, and the NaCl＋Cd stress was not equal to additional Cd and NaCI stresses, probably due to the different valence and competitive site of Na^＋ and Cd^2＋. NaCI addition in the Cd-containing medium caused remarkable reductions in both Cd concentration and accumulation, with the extent of reduction being also dependent on genotypes. The salt-tolerant genotypes had lower Na concentration than sensitive ones.

关键词： Barley Cadmium Growth mineral nutrient Salinity

The Physiological and Molecular Responses of Exogenous Selenium to Selenium Content and Fruit Quality in Walnut

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Phyton-International Journal of Experimental Botany 2023年第3期92卷 851-860页

作者： Mufang Sun Xinran Hui Cuiling Tong Longyi Yuan Dejian Zhang Xinyang Agriculture and Forestry University Xinyang464000China Tibet Plateau Walnut Industry Research Institute Yangtze UniversityCollege of Horticulture and GardeningJingzhou434025China Jingzhou Institute of Technology Jingzhou434025China

To study the effect of exogenous selenium on fruit quality in walnut(Juglans regia L.),8-year-old walnut(Qingxiang)was taken as the research *** the fruit expansion stage,300 mg/L of sodium selenate,yeast selenium and sodium selenite solutions were applied on the leaf of walnut,and the selenium levels in leaves,pericarp and kernel were determined at the ripening *** fruit quality,mineral nutrient content,antioxidant enzyme activity,and related genes’expression were *** results showed that the three exogenous selenium increased the selenium levels in leaves,pericarp and kernel of *** also significantly increased fruit and kernel weights,and kernel linoleic acid,but markedly decreased kernel crude fat and saturated fatty *** spraying promoted the absorption of mineral nutrients such as potassium and zinc,but inhibited the absorption of calcium,and had no significant effect on iron and magnesium in the *** exogenous selenium increased the activities of superoxide dismutase(SOD),peroxidase(POD),ascorbate peroxidase(APX),and catalase(CAT)significantly in the *** for sodium selenate treatment significantly reduced malondialdehyde(MDA)content in the kernel,the other two selenium sources treatments had no significant effect on MDA and hydrogen peroxide(H2O2)*** also increased the expression of JrCu/Zn-SOD,Jr2-Cys POD,JrCyt-APX and JrCAT in kernel,to different *** implies that,in the walnut fruit enlargement period,the foliar spraying selenium could increase the selenium content of walnut,affect the mineral nutrient absorption,improve the antioxidant capacity and related genes’expression,and reduce the degree of peroxide,and then improve the quality of ***,yeast selenium showed the comprehensive effect of the best.

关键词： Antioxidant system fruit quality mineral nutrient selenium walnut

Effects of Auxin at Different Concentrations on the Growth,Root Morphology and Cadmium Uptake of Maize(Zea mays L.)

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Phyton-International Journal of Experimental Botany 2022年第9期91卷 1933-1944页

作者： Lingyan Hu Haiyan Chen Guangqun Zhang Zihao Yu Kai Yan Fangdong Zhan Yongmei He College of Resources and Environment Yunnan Agricultural UniversityKunming650201China

Indoleacetic acid(IAA)is an important regulator that plays a crucial role in plant growth and responses to abiotic *** the present study,a sand cultivation experiment was carried out to investigate the effects of IAA at different concentrations(0,0.01,0.1,0.5,1,and 2.5 mmol/L)on maize growth,root morphology,mineral elements(Ca,Mg)and Cd uptake under 20 mg/kg Cd *** results showed that 0.01 mmol/L is the optimal IAA concentration for enhancing the Cd tolerance of *** with the control treatment,0.01 mmol/L IAA promoted maize growth,with significant increases in the height,shoot and root biomass by 34.6%,25.0%and 16.3%;altered the root morphology,with increases in root length,root tip number,and root tip density by 8.9%,31.4%and 20.7%,respectively;and enhanced the mineral element uptake of maize,resulting in signifi-cant increases in the Ca content in shoots and roots by 640.6%and 1036.4%and in the Mg content in shoots by 205.8%,*** addition,0.01 mmol/L IAA decreased the Cd content and uptake in the shoots by 51.9%and 39.6%,***,the Cd content and uptake exhibited a significant negative correlation with Ca content in roots and a significantly positive correlation with root morphology,and the Cd content in shoots was significantly and negatively correlated with root tip ***,0.01 mmol/L IAA was effective in enhancing the Cd tolerance and plant growth of maize.

关键词： Abiotic stress mineral nutrient plant growth phytohormone root trait

Genotypic Difference in Plant Growth and mineral Composition in Barley Under Aluminum Stress

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Agricultural Sciences in China 2003年第5期2卷 494-501页

作者： GUOTian-rong ZHANGGuo-ping WUFei-bo CHENJin-xin ZHOUMei-xue AgronomyDepartment ZhejiangUniversityHangzhou310029P.R.China TasmanianInstituteofAgriculturalResearch UniversityofTasmanianKindsMeadowsTasmanian7249Australia

Four barley genotypes (Tiantaiyangdamai, Xiyin2, Mimaill4 and Tai94-Ce6) were exposed to 0, 50, 100, and 150μM of Al-containing solution with pH 4.5, to determine the differences in growth inhibition , Al concentration and accumulation and mineral composition among genotypes. The results showed that Mimaill4 and Tai94-Ce6 had significantly higher Al concentration and accumulation than Tiantaiyangdami and Xiyin2, especially in roots, and the growth traits including root and shoot dry weights, shoot height, root length and tillers per plant were more inhibited in the former two genotypes. Al treatments caused a significant reduction of N, P, K, Ca, Mg and Mn content in both roots and shoots, of Cu in shoots; and a significant increase in Fe and Zn content in both roots and shoots, of Cu in roots. The changed rates of mineral content caused by Al treatments, in terms of the content in 150μM Al divided by the content in the control, differed significantly among four genotypes. Two Al-sensitive genotypes, Mimaill4 and Tai94-Ce6 had much greater changes in mineral content than other two Al-tolerant genotypes Tiantaiyangdamai and Xiyin2 when subjected to Al stress in comparison with the control. It is indicated that the Al-tolerant genotype is characterized by less uptake and accumulation of Al in roots and smaller disorders in mineral metabolism and ion homeostasis.

关键词： Aluminum toxicity Barley (Hordeum vulgare L. ) Genotype Growth mineral nutrient

Carbon Dioxide Concentrations and Light Levels on Growth and mineral Nutrition of Juvenile Cacao Genotypes

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American Journal of Plant Sciences 2021年第5期12卷 818-839页

作者： Virupax C. Baligar Marshall K. Elson Alex-Alan F. Almeida Quintino R. de Araujo Dario Ahnert Zhenli He USDA-ARS-Beltsville Agricultural Research Center Beltsville USA Department of Biological Science State University of Santa Cruz Ilhéus Brazil Indian River Research and Education Center IFAS University of Florida Fort Pierce USA

In many countries cacao (Theobroma cacao L.) is invariably grown as an understory crop in agroforestry types of cropping systems and subjected to low levels photosynthetic photon flux density (PPFD) due to presence of large number of upper story shade trees with poorly managed canopy structure. In recent years carbon dioxide concentration in the atmosphere is steadily increasing and it is unclear what impact this will have on performance of cacao grown under shade of upper story shade trees. A climatically controlled greenhouse experiment was undertaken to evaluate the effects of ambient and elevated carbon dioxide (400 and 700 μmol·mol-1) and three levels of PPFD (100, 200, and 400 μmol·m-2·s-1) on growth, and macro- and micronutrient use efficiency of three genetically contrasting cacao genotypes (CCN 51, VB 1117 and NO 81). Intraspecific variations were observed in cacao genotypes for growth parameters at ambient to elevated carbon dioxide and low to adequate levels of PPFD. With the exceptions of total root length and leaf area, irrespective of carbon dioxide and PPFD levels, all three genotypes showed significant differences in all the growth parameters. For all the cacao genotypes, increasing PPFD from 100 to 400 μmol·m-2·s-1 and carbon dioxide from 400 to 700 μmol·mol-1

关键词： Relative Growth Rate Net Assimilation Rate mineral nutrient Influx and Transport mineral nutrient Uptake Efficiency