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Quantitative analysis of soil pores under natural vegetation successions on the Loess Plateau

Science china Earth sciences 2010年第4期53卷 617-625页

作者： ZHAO ShiWei1,ZHAO YongGang1,2 & WU JinShui3.1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,institute of Soil and Water Conservation,Northwest agriculture & Forestry University,Yangling 712100,china 2 Graduate University of Chinese {3. of sciences,Beijing 100049,china 3.institute of subtropical agriculture,Chinese {3. of sciences,changsha 410125,china 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation Northwest Agriculture & Forestry University Yangling 712100 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha 410125 China

Soil pore is a key attribute of the soil structure that affects soil reservoir under natural vegetation recovery on the Loess *** study is to quantitatively analyze soil pore parameters,measured with Computed Tomography(CT) at 15-57 mm depths under five different vegetation succession stages using a concept of substituting "space" for "time" in the Ziwuling Forest Region of the Loess *** results showed that the soil pore parameters,such as pore number,porosity,circularity,and fractal dimension,increased significantly under the natural vegetation successions and varied with the pattern climax community stage>pioneering arbor community stage>scrub community stage>herbaceous community stage>abandoned farmland stage,indicating that natural vegetation recovery could remarkably improve soil pore *** the vegetation succession,this positive effect will be strengthened gradually,which means that the soil pore parameters may appear to be best at the climax community *** organic matter content increased linearly with the soil pore parameters(P<0.001).Increased organic matter accumulation was one of the major reasons for the changes in soil pore characteristics in natural vegetation succession.

关键词： Computed Tomography Loess Plateau natural vegetation succession soil pore soil organic matter

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Recent Advances in Development of Herbicide Resistant Transgenic Hybrid Rice in china

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Rice science 2009年第3期16卷 235-239页

作者： XIAO Guo-ying institute of subtropical AgricuIture Chinese Academy of Sciences Changsha 410125 China

In addition to weed control in direct seeding field of hybrid rice, herbicide resistance genes were used by Chinese scientists to increase and identify the purity of hybrid seeds, and to realize the mechanization of hybrid seed production. The elite restorer lines, such as Minghui 63. R752, T461, R402, D68 and E3. were transformed directly with herbicide resistance genes, in which D68 and E3. are restorer lines of two-line system and the others are of three-line system. Because almost all of important restorer lines are indica varieties and are recalcitrant in transformation, many herbicide resistant near-isogenic restorer lines were developed by sexual hybridization of indica and japonica varieties and backcross with indica restorer lines later, such as Ce 64, Minghui 63. Teqing, Milyang 46, R402 and 93.1, in which 93.1 is a restorer line of two-line system. The elite photoperiod-sensitive/thermo-sensitive genic male sterile lines, such as Pei＇ai 64S, P88S, 4008S and 7001S, were transformed with herbicide resistance genes. A few herbicide resistant male sterile lines were developed through sexual hybridization and subsequently systemic selection, such as Bar1259S, Bar2172S, 05Z221A and 05Z227A. With the employment of herbicide resistant male sterile lines or herbicide resistant restorer lines, a few herbicide resistant hybrid rice combinations were developed, such as Xiang 125S/Bar 68-1 and Pei＇ai 64S/Bar 93.1. Based on herbicide resistance, the research was marching on to investigate the parental lines of hybrid rice with insect resistance, drought tolerance, etc.

关键词： hybrid rice herbicide resistance breeding transgene

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^(13.)Cs Redistribution in Thin Stony Soil of a Carbonate Rock Slope in Southwest china

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Pedosphere 2011年第1期21卷 37-45页

作者： LI Hao ZHANG Xin-Bao WANG Kc-Lin WEN An-Bang institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 (China) Graduate University Chinese Academy of Sciences Beijing 100049 (China) State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 (China) institute of subtropical agriculture Chinese Academy of Sciences Changsha 410125 (China)

The fallout radionuclide cesium-13.(13. Cs) has been widely employed as a tracer for assessment of soil loss from thick uniform soils;however,few studies have been conducted on thin stony soils on slopes underlain by carbonate rocks which are widely distributed in karst *** derived from 13. Cs measurement of soil samples collected along a carbonate rock slope with thin stony soil where neither soil erosion nor deposition occurred was used to investigate the characteristics of 13. Cs redistribution in a karst area of Southwest *** results indicated that the 13. Cs inventories of the surface soil on the slope studied were much lower than that of the local 13. Cs reference inventory and the 13. Cs activities were much higher than those on slopes with thick uniform *** spatial distribution of 13. Cs inventories was characterized by considerable *** high 13. Cs depletion in the stony soil of the slope studied was mainly because a considerable proportion of the fallout input of 13. Cs could be lost with runoff and the dissolution of carbonate particles in the soil promoted the loss of 13. *** demonstrated that the rates of soil loss could not be estimated from the degree of depletion of the 13. Cs inventory relative to the local reference inventory for the thin stony soil of the rocky slope underlain by carbonate rocks in the study area in the way that has been widely used in areas with thick uniform soils.

关键词： carbonate dissolution, ^13.Cs fallout, ^13.Cs inventory karst area runoff

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Collnearity and similar expression pattern of rice DREB1s reveal their functional conservation in the cold-responsive pathway

Collnearity and similar expression pattern of rice DREB1s re...

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第十三届全国植物基因组学大会

作者： Donghai Mao,Caiyan Chen~* institute of subtropical agriculture,Chinese {3. of sciences,changsha 410125,china

The clustered genes C-repeat(CRT) binding factor(CBF)1/dehydration-responsive element binding protein DREB1B,CBF2/DREB1C,and CBF3.DREB1A play a central role in cold acclimation and facilitate plant resistance to freezing in Arabidopsis ***(Oryza sativa L.) is very sensitive to low temperature;enhancing the cold stress tolerance of rice is a key challenge to increasing its *** this study,we

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Expression,Characterization and Immunogenicity of a Major Outer Membrane Protein from Vibrio alginolyticus

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Acta Biochimica et Biophysica Sinica 2007年第3期39卷 194-200页

作者： Ronghua QIAN~(1,2) Wuying CHU~3.Zhijuan MAO~(1,4) Chongwen ZHANG~(1,2) Yongwei WEI~2 Lian YU~2* 1 Department of Biomedical Engineering,Zhejiang University,Hangzhou 3.0027,china 2 institute of Preventive Veterinary Medicine,Zhejiang University,Hangzhou 3.0029,china {3.,Chinese academy of sciences,changsha 410125,china 4 Ningbo Oceanography and Fishery institute,Ningbo 3.5012,china DepartmentofBiomedicalEngineering ZhejiangUniversityHangzhou310027China instituteofPreventiveVeterinaryMedicine ZhejiangUniversityHangzhou310029China instituteofsubtropicalagriculture ChineseAcademyofSciencesChangsha

Vibrio alginolyticus is one of the Vibrio pathogens common to humans and marine *** infection and induction of the host immune response,outer membrane proteins of bacteria play animportant *** this study,an outer membrane protein gene(ompW)was cloned from *** andexpressed in Escherichia *** 645 bp open reading frame(ORF)encodes a protein of 214 amino acidresidues with a predicted molecular weight of 23.3.*** amino acid sequence showed a high identitywith that of Photobacterium damselae(96.2%)and Vibrio parahaemolyticus(94.4%).The alignment analy-sis indicated that OmpW was highly *** dodecyl sulfate-polyacrylamide gel electrophoresisshowed that the gene was over-expressed in *** BL21(DE3..Western blot analysis revealed that theexpressed protein had *** recombinant protein was purified by affinity chromatographyon Ni-NTA Superflow *** yellow croaker vaccinated with the purified OmpW showed significantlyincreased antibody to OmpW,which could resist the infection by ***.A specific antibody wasdetected by enzyme-linked immunosorbent *** study suggested that the conserved OmpW could bean effective vaccine candidate against infection by ***.

关键词： Vibrio alginolyticus ompW expression characterization immunogenicity vaccine candidate

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Enhancing disease resistances of Super Hybrid Rice with four antifungal genes

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Science china(Life sciences) 2007年第1期50卷 31-39页

作者： ZHU HuaChen1, XU XinPing1, XIAO GuoYing2,3. YUAN LongPing2 & LI BaoJian1 1 Biotechnology Research Center, Key Laboratory of Gene Engineering of Ministry of Education, Sun Yat-sen University, Guangzhou 510275, china 2 china National Hybrid Rice R&D Center, Hunan Hybrid Rice Research Center, changsha 410125, china 3.institute of subtropical agriculture, the Chinese academy of sciences, changsha 410125, china 1. Biotechnology Research Center Key Laboratory of Gene Engineering of Ministry of Education Sun Yat-sen University Guangzhou 510275 China 2. china National Hybrid Rice R&D Center Hunan Hybrid Rice Research Center Changsha 410125 China 3. institute of subtropical agriculture the Chinese Academy of Sciences Changsha 410125 China

A plant expression vector harboring four antifungal genes was delivered into the embryogenic calli of ‘93.1’, an indica restorer line of Super Hybrid Rice, via modified biolistic particle bombardment. Southern blot analysis indicated that in the regenerated hygromycin-resistant plants, all the four anti-fungal genes, including RCH10, RAC22, β-Glu and B-RIP, were integrated into the genome of ‘93.1’, co-transmitted altogether with the marker gene hpt in a Mendelian pattern. Some transgenic R1 and R2 progenies, with all transgenes displaying a normal expression level in the Northern blot analysis, showed high resistance to Magnaporthe grisea when tested in the typical blast nurseries located in Yanxi and Sanya respectively. Furthermore, transgenic F1 plants, resulting from a cross of R2 homo-zygous lines with high resistance to rice blast with the non-transgenic male sterile line Peiai 64S, showed not only high resistance to M. grisea but also enhanced resistance to rice false smut (a disease caused by Ustilaginoidea virens) and rice kernel smut (another disease caused by Tilletia barclayana).

关键词： Super Hybrid Rice multi-gene transformation rice blast rice false smut rice kernel smut anti-fungi disease resistance

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Phosphorus Transfer and Distribution in a Soybean-Citrus Intercropping System

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Pedosphere 2006年第4期16卷 435-443页

作者： ZHOU Wei-Jun WANG Kai-Rong ZHANG Yang-Zhu YIN Li-Chu LI He-Song College of Resources and Environment Hunan Agricultural University Changsha 410128 （China） institute of subtropical agriculture Chinese Academy of Sciences Changsha 4 10125 （China）

A mini-plot field experiment was conducted on a loamy clay Oxisol to compare and evaluate P absorption and transfer in plant organs and P movement in soil profile at three P application depths under the soybean-citrus intercropping versus the monoculture using a ^3.p tracer technique. Total P absorption （Pt） by soybean and P accumulation （Pa） in soybean organs decreased significantly （P 〈 0.05） under the intercropping in contrast to the monoculture. With intercropping, when ^3.p was applied in topsoil （15 cm soil layer）, total ^3.p absorption （^3.pt） in soybeans was significantly lower （P 〈 0.05）, but when ^3.p was applied to deeper soil layers （3. or 55 cm soil layer）, ^3.pt in soybeans was significantly greater （P 〈 0.05）. The percentage of P in leaves to total P （Pa/Pt） and 3.p in leaves to total ^3.p （^3.pa/^3.pt） for soybean were ≥ 25% and those of root ≥ 12%. When P was applied ia topsoil and 55 cm soil layer, no significant differences were found between intercropping and monoculture for Pt of citrus. The P absorbed by citrus was transferred rapidly to the growing organs of aboveground during the experiment, and the speed of transferring to the growing organs slowed when P was applied to the deeper soil layers. In intercropping, P mobility was heightened in the soil profile, and P in deeper soil layers moved up to topsoil more rapidly.

关键词： agroforestry ecosystem citrus monoculture, ^3.p fate soybean

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Rice industrial economy and its development strategy

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Hunan Agricultural Science ＆ Technology Newsletter 2003年第4期4卷 2-5页

作者： Qing Xianguo Hunan academy of Agricultural sciences, changsha 410125, {3. Hunan academy of Agricultural sciences Changsha 410125China

On the basis of the analysis of the present situation of food grain and rice production in china, countering the beginning tendency to neglect rice production because of rice grain structural surplus and low market price after china’s agriculture entering the new development stage, this paper puts forward the concept of rice industrial economy, explains its attribute, connotation, key factors, etc., forms the basic idea of developing the rice industrial economy, and suggests some strategic measures such as regionalized layout of rice production,etc. to develop the rice industrial economy.

关键词： rice special use rice industrial economy strategic research development strategy

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CLASSIFICATION OF SOLUTIONS FOR A CLASS OF SINGULAR INTEGRAL SYSTEM

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Acta Mathematica Scientia 2011年第4期31卷 1449-1456页

作者：许建开谭忠 College of sciences Hunan Agriculture University School of Mathematical sciences Xiamen University

In this paper, we consider the following integral system： u（x） = R n v q （y）｜ x y ｜ nα dy, v（x） = R n u p （y）｜ x y ｜ nμ dy, （0.1） where 0 〈 α, μ 〈 n; p, q ≥ 1. Using the method of moving planes... 详细信息

In this paper, we consider the following integral system： u（x） = R n v q （y）｜ x y ｜ nα dy, v（x） = R n u p （y）｜ x y ｜ nμ dy, （0.1） where 0 〈 α, μ 〈 n; p, q ≥ 1. Using the method of moving planes in an integral form which was recently introduced by Chen, Li, and Ou in [2, 4, 8], we show that all positive solutions of （0.1） are radially symmetric and decreasing with respect to some point under some general conditions of integrability. The results essentially improve and extend previously known results [4, 8].

关键词： Hardy-Littlewood-Sobolev inquality integral equation moving plane interpolation inequality radial symmetry

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Stress responsive gene CIPK14 is involved in phytochrome A-mediated far-red light inhibition of greening in Arabidopsis

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Science china(Life sciences) 2010年第11期53卷 1307-1314页

作者： QIN YuZhi2,3. GUO Ming1, LI Xu1, XIONG XingYao2,3. HE ChangZheng2,3. NIE XianZhou4 & LIU XuanMing1 1College of Life Science and Biotechnology, Hunan University, changsha 410082, china 2College of Horticulture and Landscape, Hunan Agricultural University, changsha 410128, china 3.unan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, changsha 410128, china 4Potato Research Centre, agriculture and Agri-Food Canada, Fredericton, New Brunswick E3. 4Z7, Canada 2. College of Horticulture and Landscape Hunan Agricultural University Changsha 410128 China3. Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization Hunan Agricultural University Changsha 410128 China1. College of Life Science and Biotechnology Hunan University Changsha 410082 China4. Potato Research Centre Agriculture and Agri-Food Canada Fredericton New Brunswick E3B 4Z7 Canada

In this study, we show that CIPK14,a stress responsive CBL-interacting protein kinase gene,is involved in phytochrome A-mediated far-red light inhibition of greening in Arabidopsis seedlings. The CIPK14-impairment mutant cipk14 grown in continuous far-red (FR) light did not show greening when exposed to white light illumination for 15 h. By contrast, the FR-grown phytochrome A null mutant phyA greened within 0.5 h of exposure to white light. Although greening of Col-4 (wild-type) was not completely abolished by FR, it exhibited a significantly decreased greening capacity compared with that of phyA. Further analyses demonstrated that the expression of protochlorophyllide reductase (POR) genes was correlated with the greening ability of the genotypes. In addition, CIPK14 appeared to be regulated by both the circadian clock and PhyA. Taken together, these results suggest that CIPK14 plays a role in PhyA-mediated FR inhibition of seedling greening, and that a Ca-related kinase may be involved in a previously undefined branch point in the phytochrome A signaling pathway.

关键词： chlorophyll CIPK14 far-red light inhibition of greening POR phytochrome A

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