干旱区研究最新文献

{"title":"Comparison of different methods for RNA extraction from Capparis spinosa.","authors":"Lu Dongdong, S. Qinghua, Chen Hong, Dong Yu-zhi","doi":"10.3724/SP.J.1148.2009.00401","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00401","url":null,"abstract":"Capparis spinosa is a shrub with high cultivation and economic value in desert and semi-desert areas,and it is a rare species for studying plant stress resistance.An effective method of isolating total RNA from the leaves of wild Capparis spinosa is developed.RNA is extracted by the methods of Trizol regent,CTAB and SDS by combining with 70% acetone.After separately analyzing the rate of yield,purity,quality,electrophoretograms and RT-PCR production,an improved effective SDS method is preliminary developed to extract the total RNA from Capparis spinosa leaves.The A260/A280 value of RNA extracted with this method varies in a range of 1.88~1.94,and the electrophoretograms are integrated.This RNA extraction method is characterized by the high yield,short duration,low cost,etc.,and can be used in some experiments,such as RT-PCR,cDNA library construction and northern hybridization.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"401-405"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69821283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis on Species Diversity of Oxytropis in Xinjiang","authors":"Gao MuMu, Y. Ping, Li Xueyu","doi":"10.3724/SP.J.1148.2009.00384","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00384","url":null,"abstract":"There are 98 species and 2 varieties in the genus of Oxytropis in Xinjiang,and they account for 67.1% of the total in China.Among them 7 species are endemic in Xinjiang,58 ones are distributed only in Xinjiang in China,and about 65% species belongs to the two of them.Species are all distributed in 11 floristic regions in Xinjiang.The Junggar Basin and the Tianshan Mountains,especially the Tianshan Mountains,are regarded as the areas with the most abundant species of Oxytropis in Xinjiang.So it is concluded that the Junggar Basin and the Tianshan Mountains may be the central areas of modern distribution and origin differentiation of Oxytropis DC.Most species(about 99%) are distributed in the mountainous areas with an altitude range from 1 001 m to 5 000 m a.s.l.,especially in an altitude range from 1 001 m to 4 000 m,and the richest species are distributed in an altitude range from 2 001 m to 3 000 m.There are two kinds of life-forms,hemicryptophyte and chamaephyte,the proportion of the former is as high 96%,but that of the latter is 4% only.The relations of flora in Xinjiang are the closest with that in adjacent Qinghai Province and Tibet Autonomous Region(their similarity coefficients are 28.8% and 28.6% respectively),but not so close with that in Inner Mongolica and Gansu Province.The relations of flora in Xinjiang are the closest with that in Kazakhstan(the similarity coefficient is as high as 65.2%),then with that in west Siberia and Kyrghizstan(the similarity coefficients are 41.8% and 41.0% respectively),and the weakest with that in Mongolica,Tajikistan and Pakistan(their similarity coefficients are 29.2%,22.8% and 11.6% respectively).","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"384-389"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69821584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis on land use trend in some typical regions in the Ordos Plateau.","authors":"Chen Junfeng, J. Baoquan, Zhao Xiuhai, Lu Peiling","doi":"10.3724/SP.J.1148.2009.00354","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00354","url":null,"abstract":"Land use/cover change(LUCC) is a key field in the globe change research.Thus,many researches on LUCC have been carried out in recent years.Farming-pasturing ecotone is a special ecological-fragile zone in China,especially in north China.The Ordos Plateau is located in a farming-pasturing ecotone in north China,so the research on LUCC is of significance in revealing the information of environment change.In this paper,the land use maps in 1985,1995,2000 and 2004 are interpreted from Landsat TM images and used to analyze the dynamics in some typical regions in the Ordos Plateau.The results show that the LUCC in the regions was obvious during these periods.Firstly,the only landscape matrix in the study area is grasslands with a vegetation coverage range of 69.29%～82.25%.Secondly,the stability of different land use types is different.The most stable types are grasslands and unused land,their stability is higher than 87%.The changing directions of land use types are as follows: the first one is the change from cropland,unused land and woodlands to grasslands,the second one is that from grasslands to waters and construction land,and the third one is that from construction land to unused land.In order to discuss the spatial and temporal stability of the different LUCC types,the transition probability method is used in this study.If 50% of a LUCC type can be maintained stable in spatiality at different time stages,it is considered that this LUCC type has a high stability.From this viewpoint,it is found that the stability of grasslands is the highest,and then that of unused land and construction land.Thirdly,the reduction of cropland and unused land with the increase of woodlands and grasslands reveals that the environment in the Ordos Plateau has been improved.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"354-360"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69821003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the characteristics of precipitation resources and the afforestation suitability in the Loess Plateau.","authors":"He Yongtao, Li Wenhua, Lang HaiOu","doi":"10.3724/SP.J.1148.2009.00406","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00406","url":null,"abstract":"Located in the arid and semi-arid regions,the Loess Plateau is a fragile region with low precipitation and intensive evaporation.Therefore,water is the most important limiting factor,and how to restore suitable vegetation in different regions based on the precipitation is a foundation to the ecological conservation and regeneration in the plateau.Based on the 40-year(1961-2000) climate data observed by 68 meteorological stations in the Loess Plateau,the precipitation characteristics in the plateau are analyzed.The results show that precipitation is distinctly different from the different areas,the average annual precipitation decreases from 600 mm in the south to 200 mm in the north of the plateau;80% annual precipitation occurs in plant growing season,so it is drought in spring and autumn but rainy in summer.According to the water balance of the forest ecosystem in growing season,the afforestation suitability is calculated using precipitation and ecological water requirement of woodlands.On which four different regions for afforestation are divided by regarding the counties in the Loess Plateau as the units.The results reveal that the area suitable to plant trees is about one quarter of the whole plateau,and another one quarter of the plateau are suitable to plant shrubs.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"406-412"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69821633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification Marks of Paleo-flood Events and the Preliminary Application of Micro-morphology in It","authors":"Dai XiaoGuo, Zhang Xiaochun, Pang Jiangli","doi":"10.3724/SP.J.1148.2009.00340","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00340","url":null,"abstract":"Paleo-flood hydrology study is a hot field in global change study.It is the key for studying paleo-flood events how to look for and identify the paleo-flood slack-water deposits effectively and accurately.In this paper,the effects of paleontology,archeology,sedimentology and geochemistry in studying paleo-flood events are summarized at first,and then the micro-morphological features of paleo-flood deposits and other strata are compared and analyzed based on the theory of micro-morphology.The results show that the grain characteristics,mineral composition,pores and micro-configuration in paleo-flood deposits are obviously different from those in other strata:(1) The grains in the paleo-flood slack-water deposits are fine,well-sorted and subrounded or rounded;(2) Mineral composition in the paleo-flood deposits is similar to that in other strata,but the contents of unstable minerals are relatively low in paleo-flood deposits;(3) Soil in paleo-flood deposits is dominated by clay,and the clay content is second only to that in paleosol;(4) The pores are irregular,and the pore walls are coarse.These reveal that the micro-morphology can be used to research and identify the paleo-flood events.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"340-346"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69820836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Review about the Research on Adaptability in Climate Change——Present Situation and Tendency","authors":"Yiping Fang, Q. Dahe, Yongjian Ding","doi":"10.3724/SP.J.1148.2009.00299","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00299","url":null,"abstract":"Analyses on adaptability in climate change field emerge concurrently with the growing awareness to climate change itself.It is of important significance for reducing the vulnerability of climate change and increasing the adaptability and adaptive capability of human beings to understand the research approaches,analysis content under present situation and international tendency of research on the adaptability in climate change based on literature review in this field.In this paper,the concept of adaptability in climate change and its application as well as the relations between the adaptability and the adaptive capability,and between the response capability and the resilience are analyzed.Moreover,the four focus research fields including the effect of the assumed adaptability,specific adaptation options,relative adaptive capability of different countries,regions or communities,and practical adaptation initiatives are reviewed,and a general summary of adaptability research orientation(e.g.community-based adaptability,bottom-up approach and adaptation processes) is carried out.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"299-305"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69820967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the Features and Plant Diversity of the Forest Gaps on the Loess Plateau: Study on the Features and Plant Diversity of the Forest Gaps on the Loess Plateau","authors":"Feng Li, Xiao-an Wang, Hua Guo, Li Lei","doi":"10.3724/SP.J.1148.2009.00377","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00377","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"377-383"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69821512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of environmental information system for the Tarim River Basin.","authors":"Shi Jian-kang, Bao An-ming, Liu Hailong, Feng Xianwei, Wang Weisheng, Chen Baohua","doi":"10.3724/SP.J.1148.2009.00347","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00347","url":null,"abstract":"The environmental information system is a thematic analysis subsystem in the water redistribution management system for the Tarim River Basin.This paper studies mainly the general design,structure and functions of the thematic analysis subsystem and the integration with other subsystems.Firstly,the ecological quality indices(EQI),such as the biological abundance index,vegetation coverage index,hydrographic net density index,land degradation index and pollution load index,are used to investigate the environmental quality in the Tarim River Basin.Secondly,a quota method is put forward for calculating the ecological water demand of natural vegetation.Thirdly,some indexes including the ecological degeneration index,risk degree index and regeneration degree index are calculated based on the concept of ecological risk assessment and the method of landscape ecology,and the corresponding ecological risk is analyzed and assessed.The results show that it is of the obvious practicality and maneuverability to take the means of ArcGIS+Oracle9i+ArcSDE to develop the environmental information system.The study results can be used to carry out the thematic assessment and analysis of ecological environment in arid areas,and can also be referred in developing other systems concerned.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"347-353"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69820952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the change of annual potential evapotranspiration in the Tianshan Mountainous in resent 36 years and its comparison with that in South Xinjiang and North Xinjiang.","authors":"Pu Zong-chao, Zhang Shanqing, Wang Shenglan, Li Jinglin, L. Min, Sun Yueqin","doi":"10.3724/SP.J.1148.2009.00424","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00424","url":null,"abstract":"Based on the climatic data observed by 24 meteorological stations in the different climatic regions of Xinjiang during the period of 1971-2006,in this paper the potential evapotranspiration at all the stations are calculated with the Penman-Monteith equation recommended by FAO in 1998,and the change characteristics of potential evapotranspiration in the Tianshan Mountains are compared with that in South Xinjiang and North Xinjiang.The results are mainly as follows:(1) The change trend of potential evapotranspiration in the Tianshan Mountains is similar to that in South Xinjiang and North Xinjiang,but the average value and the linear degression speed of potential evapotranspiration in the Tianshan Mountain are lower and the annual and decadal change is more stable than that in South Xinjiang and North Xinjiang;(2) The cyclical change of annual potential evapotranspiration in the Tianshan Mountains is similar to that in North Xinjiang,and there is a remarkable cycle about 4.5 years,but there is no remarkable cycle less than 36 years in South Xinjiang in recent 36 years;(3) A sudden reduction of potential evapotranspiration occurred in the Tianshan Mountains in 1991,it occurred in South Xinjiang and North Xinjiang in 1988 and 1986 respectively,and it was 3~5 years latter in the Tianshan Mountains than that in South Xinjiang and North Xinjiang;(4) The main spatial distribution characteristics of annual potential evapotranspiration are the synchronous changes in these three regions,but the synchronous change of spatial distribution of annual potential evapotranspiration is the highest in North Xinjiang and the lowest in the Tianshan mountains.The reverse change in the spatial distribution of annual potential evapotranspiration is the highest in the South Xinjiang and the lowest in the Tianshan Mountains;(5) Spatiotemporal difference of climate change is the main factor causing the different change of potential evapotranspiration in different regions.Under the background of reduction of potential evapotranspiration in recent 36 years,wind speed increased,but the precipitation and air relative humidity decreased in the mid-and late-1990s.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"424-432"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69822015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Drought Stress on Drought-induced Protein in Leaves of Chenopodium album L.","authors":"Sun Cunhua, Du Wei, Xu Xinna, Cheng Xiangling, Zhang Yahong","doi":"10.3724/SP.J.1148.2009.00372","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00372","url":null,"abstract":"In this paper,the effect of drought stress on drought-induced protein in leaves of Chenopodium album L.is studied using the SDS-PAGE method.The results show that,on the tenth day of drought stress,the polypeptides with molecular weights of approximate 110.3 KD,103.9 KD,24.8KD,22.7KD and 21.0KD on SDS-PAGE gel were remarkably increased under moderate drought stress,and the polypeptides with molecular weights of approximate 22.7KD and 21.0KD were remarkably increased under severe drought stress,but were much lower than that under moderate drought stress;on the fifteenth day of drought stress,the polypeptides with molecular weights of approximate 110.3 KD,103.9 KD,26.4KD,24.8KD,22.7KD,21.0KD and 19.2KD were remarkably increased under moderate drought stress.It is revealed that the expression of gene which is more adaptable to drought stress and more resistant to drought is induced,or the expression of some gene is increased and results in the appearance of some new protein,or the content of some protein is increased and the drought-resistant capacity of Chenopodium album L.is enhanced.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"372-376"},"PeriodicalIF":0.0,"publicationDate":"2010-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69821404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}