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Impacts of Defoliation on Morphological Characteristics and Non-Structural Carbohydrates of Populus talassica × Populus euphratica Seedlings

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1689-1703页

作者： Mengxu Su zhanjiang Han Zhen Zhao Xiaofeng Wu Jiaju Wu College of life science and {2. Tarim UniversityXinjiang Production and Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim BasinAlar843300China Agricultural science Research Institute of the First Division Xinjiang Production and Construction CorpsAlar843300China

Leaves are important‘source’organs that synthesize organic matter,providing carbon sources for plant ***,we used Populus talassica×Populus euphratica,the dominant species in ecological and timber forests,to simulate carbon limitation through artiﬁcial 2.%,50%,and 75%defoliation treatments and explore the effects on root,stem,and leaf morphology,biomass accumulation,and carbon allocation *** the 60th d after treat-ment,under 2.%defoliation treatment,the plant height,speciﬁc leaf weight,root surface area and volume,and concentrations of non-structural carbohydrates in stem and root were signiﬁcantly increased by 9.13%,2..00%,16.60%,31.95%,5.12.,and 9.34%,respectively,relative to the *** was no signiﬁcant change in the growth indicators under 50%defoliation treatment,but the concentrations of non-structural carbohydrates in the leaf and stem signiﬁcantly decreased,showing mostly a negative correlation between *** opposite was observed in the *** 75%defoliation treatment,the plant height,ground diameter,leaf number,single leaf area,root,stem,and total biomass were signiﬁcantly reduced by 14.15%,10.2.%,14.86%,11.31%,11.56%,2..87%,and 16.82.,respectively,relative to the *** concentrations of non-structural carbohydrates in various organs were signiﬁcantly reduced,particularly in the consumption of the starch concentrations in the stem and *** results indicated that carbon allocation strategies can be adjusted to increase the con-centration of non-structural carbohydrates in root and meet plant growth needs under 2.%and 50%***,75%defoliation signiﬁcantly limited the distribution of non-structural carbohydrates to roots and stems,reduced carbon storage,and thus inhibited plant ***-induced carbon limitation altered the carbon allocation pattern of ***×***,and the relationship between carbon reserves in roots and tree growth recovery after defoliation was *** study

关键词： Populus talassica×Populus euphratica defoliation carbon limitation carbon allocation non-structural carbohydrates

Cu_2.nSnS_4 thin films prepared by sulfurizing different multilayer metal precursors

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science china(Technological sciences) 2009年第1期52卷 269-272页

作者： ZHANG Jun & SHAO LeXi school of Physical science and {2., zhanjiang normal university, zhanjiang 524048, china school of Physical science and {2. Zhanjiang Normal University Zhanjiang 524048 China

Cu2.nSnS4 (CZTS) thin films were successfully fabricated on glass substrates by sulfurizing Cu-Sn-Zn multilayer precursors, which were deposited by ion beam sputtering and RF magnetron sputtering, respectively. The structural, electrical and optical properties of the prepared films under various processing conditions were investigated in detail. Results showed that the as-deposited CZTS thin films with the precursors by both ion beam sputtering and RF magnetron sputtering have a composition near stoichiometric. The crystallization of the samples, however, has a strong dependence on the atomic percent of constituents of the prepared CZTS films. A single phase stannite-type structure CZTS with a large absorption coefficient of 104/cm in the visible range could be obtained after sulfurization at 52.℃ for 2.h. The samples relative to the RF magnetron sputtering showed a low resistivity of 0.073 ?cm and band gap energy of about 1.53 eV. The samples relative to the ion beam sputtering exhibited a resistivity of 0.36 Ωcm and the band gap energy is about 1.51 eV.

关键词： Cu_2.nSnS_4 solar cell thin film ion beams sputtering RF sputtering

OPTIMAL CONTROL OF MULTISOLUTION ORDINARY DIFFERENTIAL EQUATIONS IN THE ABSENCE OF CONVEXITY

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Journal of Systems science & Complexity 2010年第2期23卷 321-333页

作者： Shu LUAN Hang GAO school of Mathematics and Computation science Zhanjiang Normal College Zhanjiang 524048 China. school of Mathematics and Statistics Northeast Normal University Changchun 130024 China.

In this paper,the authors study an optimal control problem governed by a class of multistateordinary differential equations in the absence of *** overcome the difficulty that thecorresponding approximate optimal control problem may have no solution,relaxed controls are *** the help of relaxation theory,Pontryagin's maximum principle for the optimal pairs ofthe original control problem is *** the end of this paper,the authors discuss the applicationof the maximum principle by an example.

关键词： Multisolution ODEs optimal control Pontryagin's maximum principle relaxed controls.

Travelling wave solutions of a generalized Camassa-Holm-Degasperis-Procesi equation

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science china Mathematics 2011年第3期54卷 555-572页

作者： DENG ShengFu1, GUO BoLing2.& WANG TingChun2.3 1Department of Mathematics, zhanjiang normal university, zhanjiang 524048,{2. 2.nstitute of Applied Physics and Computational Mathematics, Beijing 100088,{2. 3 College of Math and Physics, Nanjing university of Information science and technology, Nanjing 2.0044,{2. 1. Department of Mathematics Zhanjiang Normal University Zhanjiang 524048 China2. Institute of Applied Physics and Computational Mathematics Beijing 100088 China3. College of Math and Physics Nanjing University of Information Science and Technology Nanjing 210044 China

The travelling wave solutions of a generalized Camassa-Holm-Degasperis-Procesi equation ut-uxxt + (1 + b)umux = buxuxx + uuxxx are considered where b > 1 and m are positive integers. The qualitative analysis methods of planar autonomous systems yield its phase portraits. Its soliton wave solutions, kink or antikink wave solutions, peakon wave solutions, compacton wave solutions, periodic wave solutions and periodic cusp wave solutions are obtained. Some numerical simulations of these solutions are also given.

关键词： homoclinic orbits heteroclinic orbits peakon wave solutions compacton wave solutions periodic cusp wave solutions

Sequencing and analysis of the complete mitochondrial DNA of Russell's snapper (***)

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Progress in Natural science:Materials International 2008年第10期18卷 1233-1238页

作者： Yusong Guo~(a,1) Zhongduo Wang~(a,b,1) Chuwu Liu~(a,*) Yun Liu~b ~a Fisheries College,guangdong Ocean university,{2. 52.02.,china ~b College of life science,Hunan normal university,Changsha 410081,china Fisheries College Guangdong Ocean University Zhanjiang 524025 China College of life science Hunan Normal University Changsha 410081 China

The entire mitochondrial DNA sequence (mitogenome) of Russell’s snapper (Lutjanus russellii) was determined using long PCR and primer-walking methodology,representing the first complete mitogenome accessioned for Lutjanid fishes (16,505 bp,GenBank Acces- sion ***5142.8).The mitogenome was similar in gene composition and order to those of other vertebrates,having 37 structural genes,i.e.,two ribosomal RNAs,2. transfer RNAs,and 13 protein-coding *** analyses based on the mtDNA sequence of Russell’s snapper supported a close relationship between Lutjaninae and Caesioninae,consistent with taxonomic hypotheses based on *** studies utilizing mitogenomes are needed to resolve high-level relationships among snappers.

关键词： Lutjanus russellii Mitochondrial DNA Mitogenome Complete mtDNA sequence Long PCR

Evolutionary divergence of subgenomes in common carp provides insights into speciation and allopolyploid success

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Fundamental Research 2024年第3期4卷 589-602页

作者： Lin Chen Chengyu Li Bijun Li Xiaofan Zhou Yulin Bai Xiaoqing Zou Zhixiong Zhou Qian He Baohua Chen Mei Wang Yaguo Xue Zhou Jiang Jianxin Feng Tao Zhou zhanjiang Liu Peng Xu State Key Laboratory of Mariculture Breeding College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China Fujian Key Laboratory of Genetics and Breeding of Marine Organisms College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China State Key Laboratory of Marine Environmental science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China Integrative Microbiology Research Centre South China Agricultural UniversityGuangzhou 510642China College of Fisheries Henan Normal UniversityXinxiang 453007China Henan Academy of Fishery science Zhengzhou 450044China Department of Biology College of Arts and SciencesSyracuse UniversitySyracuse 13244USA

Hybridization and polyploidization have made great contributions to speciation,heterosis,and agricultural production within plants,but there is still limited understanding and utilization in *** structure and expression reorganization and cooperation post hybridization and polyploidization are essential for speciation and allopolyploid ***,the mechanisms have not yet been comprehensively assessed in ***,we produced a high-fidelity reference genome sequence for common carp,a typical allotetraploid fish species cultured *** genome enabled in-depth analysis of the evolution of subgenome architecture and expression *** genes were expressed with subgenome biases,with a trend of transition from the expression of subgenome A during the early stages to that of subgenome B during the late stages of embryonic *** subgenome A evolved more rapidly,subgenome B contributed to a greater level of expression during development and under stressful *** dominant patterns for homoeologous gene pairs both during development and under thermal stress suggest a potential fixed heterosis in the allotetraploid *** expressing either copy of a homoeologous gene at higher levels to confer development and response to stress indicates the dominant effect of *** plasticity of subgenomes and their shifting of dominant expression during early development,and in response to stressful conditions,provide novel insights into the molecular basis of the successful speciation,evolution,and heterosis of the allotetraploid common carp.

关键词： Allotetraploid Subgenome structural evolution Homoeologous expression Expression dominance shift Environmental adaptation

Barriola-Vilenkin黑洞的统计熵

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物理学报 2004年第11期53卷 3673-3675页

作者：李固强湛江师范学院信息科技学院湛江524048

利用量子统计方法 ,直接计算Barriola_Vilenkin黑洞背景下玻色场和费米场的配分函数。

关键词：黑洞玻色场费米场统计熵膜模型量子统计配分函数直接计算

Effects of residual chlorine on the mortality, grazing and respiration of Labidocera euchaeta (Copepoda)

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Acta Oceanologica Sinica 2011年第2期30卷 96-102页

作者： MA Zengling LIN Hongping GU Xiaolian XU Zhaoli Key and Open Laboratory of Marine and Estuary Fisheries （Ministry of Agriculture） East ChinaSea Fisheries Research Institute Chinese Academy of Fisheries Science Shanghai 200090 China Institute of life science and {2. Zhanjiang Normal University Zhanjiang 524048 China

In this study,the authors investigated the effects of residual chlorine on mortality,grazing and respiration of Labidocera euchaeta in *** grazing rate was evaluated by subtraction method of food concentration and respiration rate was measured using oxygen *** was found that the lethal effect of residual chlorine on *** increased with enhanced concentration and prolonged *** medium lethal concentration （LC 50 ） of chlorine for *** in 2. h was about 0.58 mg/L and the safe concentration was about 0.2. mg/***,the grazing and respiration of *** decreased by 32.6% and 18.9% when exposed to 0.2.mg/L residual chlorine for 4 *** indicated that the physiological activities of zooplankton could be suppressed by the residual chlorine less than the safety ***,both survival and physiological activities of the organisms living in the thermal （nuclear） power plant discharging waters should be considered when carrying out the ecological risks assessment.

关键词： copepod grazing Labidocera euchaeta residual chlorine respiration zooplankton

自旋场对Barriola-vilenkin黑洞熵的量子修正

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物理学报 2003年第6期52卷 1346-1349页

作者：李固强湛江师范学院信息科技学院湛江524048

用砖墙模型的方法 ,讨论了无源引力场对Barriola Vilenkin黑洞熵的量子修正 .计算表明 ,量子修正应该包含两部分 :其中一部分与视界面积成正比 ,在视界附近与紫外截断因子是平方反比发散的 ;另一部分是两个对数发散项 ,这部分除了与... 详细信息

用砖墙模型的方法 ,讨论了无源引力场对Barriola Vilenkin黑洞熵的量子修正 .计算表明 ,量子修正应该包含两部分 :其中一部分与视界面积成正比 ,在视界附近与紫外截断因子是平方反比发散的 ;另一部分是两个对数发散项 ,这部分除了与黑洞的本身特征性质 (M ,η)有关以外 ,还与自旋场的自旋有关 .

关键词：自旋场 Barriola-vilenkin黑洞熵量子修正视界面积砖墙模型