Abstract:Physical properties of Starch from 35 wheat-Agropyron cristatum alien derivatives and their parents (Fukuho:Triticum aestivum cv.Fukuho,2n=6x=42,AABBDD,as female parent;Z559:Agropyron cristatum L.Gaertn,2n=4x=28,PPPP,as male parent.) were investigated usi

Abstract:Under field conditions,two winter wheat cultivars,Yumai 49 and Zhoumai 13,were used to determined the diurnal changes of flag leaf net photosynthetic rate (Pn) and its major affecting factors,i.e.leaf temperature (Tl),photosynthetically active radiation (

Abstract:Two ecotypes of reeds were used as experimental material and stressed under PEG6000.The results showed that the drought-resistant reed (dune reeds) contained less soluble proteins than that of the drought-sensitive reed (swamp reeds).However,the soluble p

Abstract:研究了高寒山区几种草本植物在低温生长过程中植物叶中抗氧化酶、抗氧化物和膜脂过氧化产物的变化及其作用。结果表明，耐寒性差、生长期短的一年生植物微孔草MDA含量较低，保护酶活力也较低。耐寒性强、生长期长的苜蓿、垂穗披碱草、草地早熟禾、无芒雀4种多年生植物MDA含量较高，保护酶活力和抗氧化物含量也较高。其生长季平均MDA含量分别比微孔草高2．27倍、1．64倍、2．07倍和1．55倍，超氧化物歧化酶（SOD）活力分别比微孔草高16．7％、27．1％、46．2％和11．5％；地氧化氢酶（CAT）分别高51．5％、123．0％、25．3％和9．4％，类胡萝卜麦含量分别高126．5％、142．7％、138．4％和394．4％。当气温低于0℃后，微孔草死亡，完成生活史，以种子越冬，在生理上无明显抗冻特征。而此时多年生植物SOD活力趋于增强，仍能一定生长，至－5℃～10℃低温时地上部才枯死，其细胞具有较强的耐膜脂过氧化能力和抗氧化酶系统，对环境的快速反应可能是其在高寒山区低温生长的重要生理机理。

Abstract:The effect of low-phosphorus stress and drought stress during the stage of tillering and booting on growth of wheat (Triticum aestivum L.) was studied.The results showed that,low-phosphorus stress could sharply decrease the number of tillering,relative wa

Abstract:It was studied that two species of tree grew under 3 treatments of soil water content,results showed that leaf water content of seabuckthorn is higher and water potential is lower than that of poplar in same soil water content.That results show seabucktho

Abstract:Cucumber (Cucumis sativas) and wheat (Triticum aestivum) were treated under the stress with their combined concentration of Cd and Pb.The distribution of Cd,Pb and changes of chlorophyll,ethylene production,free proline contents in plant were studied resp

Abstract:In the article,we studied the different factors influncing the tissue culture and biolistic bombardment in wheat transfer.Immature embryo used as acceptor in gene transfer is better than that of young spike because of quickly callus formation and good cal

Abstract:The hypocotyls of buckwheat (Fagopyrum esculentum Moench.) seedlings were sliced and cultured on MS medium containing different phytohormones to induce callus.The frequency of callus induction reached to 100%.Calli were subcultured on MS medium supplement

Abstract:The expression patterns of soluble proteins,peroxidase and esterase isozymes were analysed on globular embryogenesis in tissue cultures of alfalfa,it was concluded that from embryogenic callus to globular embryo genesis 11 peptides emerged and disappeared

Abstract:To make full use of Anisodus tanguticus,The contents of four tropane alkaloids(anisodine?scopolamine?anisodamine and atropane) in Anisodus tanguticus was analyzed by HPLC during the different collecting seasons.The relationship between the four alkaloids

Abstract:We have constructed bacterial artificial chromosome mixed-clone pool for Triticum boeoticum Boiss using the bacterial artificial chromosome (BAC) vector (pECBAC1).The pool contained 100 BAC clones.The pooled BAC clones were stable after 12 h culture in pr

Abstract:Fresh ripe removed-pit Oil Jujube,Mu Jujube and Tuan Jujube were treated with 95% ethanol,and then with ethyl ether and were analyzed by GC-MS,respectively.The results showed that the volatile compounds were mainly ethyl palmitoleate,ethyl palmitate,ethyl

Abstract:Effect of different contents of nitrogen application (67.5 kg/667 m 2,157.5 kg/667 m 2 and 247.5 kg/667 m 2) on amino acids content in process of Xiao Yan (No.6,107) and hard seed wheat (4286) seed development was studied.The results showed that nitrog

Abstract:研究了三唑酮处理后离体黄瓜子叶衰老过程中活性氧的产生及膜系统有变化。结果表明：20mg/L三唑酮能有效抑制O^-2.、H2O3的累积，减轻质膜相对透性和膜脂过氧化程度及组织自动氧化速率。这表明三唑酮减轻了活性氧在植物体内的累积，可以作为一种活性氧的直接或间接清除剂。

Abstract:A new species of the Gensu Patrinia Juss.from Gansu has been published in this paper.That is known as P.trifoliata L.Jin et R.N.Zhao Sp.nov.

Abstract:Recent advances about the effects of enhanced UV-B radiation on plants and ecosystems were reviewed in this paper.The following is noteworthy:1.Several studies have reached to molecular level;2.Studies on plant growth regulation caused by UV-B radiation w

Abstract:This paper introduced the basic properties and physiological functions of the 3 kinds of main functional proteins,Pm H +-ATPase,PM Ca 2+-ATPase and PM Redox protein existing in plant PM.The recnet progress on their activities,response to stress were r

Abstract:The studies on root exduation and their physiological ecology roles were summarized,with emphasis on relationship between root exudation and nutrient deficiency and rhizosphere microorganisms.The results indicated that root have many mechanisms to exudate

Abstract:This review deals with natural products possessing antifeedant and insecticidal properties from botanical origin recently.These compounds include chemically diverse structure types such as terpenoids,alkaloids,flavanoids,lipids,as well as lignans.

Abstract:Because of its hypervariability,neutrality,co-dominance and ubiquity in eukaryotic genomes,microsatellite DNA is becoming preferred molecular marker for population genetic studies,as well as for strain identification,kinship analysis,and mapping purpose.T

Abstract:Numerous strides have been made in isolation and characterization of ethylene receptor genes.Tomato contains a family of ethylene receptors designed \%Le-ETR1,Le-ETR2,Le-ETR3,Le-ETR4,Le-ETR5\%,with homology to the Arabidopsis ETR1,which is mimic to bacter

Abstract:In views of the new advance of research on the family Enalyptaceae and according to the specimens collected from China,1 genus and its 10 species are recognized currently.All of them can be classified into 6 areal-types and 3 subtypes based on Z Y Wu's

Abstract:在陕西黄龙山区、秦岭北坡和巴山北坡设置 1 0× 1 0 m2 样方 98个 ,应用相邻格子法进行每木调查获得野外资料 ,采用离散分布理论拟合检验、t检验和聚集强度测定的方法 ,对栓皮栎种群空间分布格局及动态进行了对比研究。结果表明 :1栓皮栎种群在黄龙山区为奈曼 A型分布 ,秦岭北坡和巴山北坡为负二项分布 ;聚集强度 ,秦岭北坡 >黄龙山区 >巴山北坡。 2在秦岭和巴山北坡中低海拔地区 ,种群为负二项分布 ,随海拔升高 ,秦岭北坡趋向随机分布 ,巴山北坡趋向均匀分布 ;两地种群聚集强度随海拔升高呈“低 -高 -低”的变化格局。3秦岭北坡 1～ 1 0年生种群的聚集度最大 ,随着年龄增加 ,聚集强度逐渐下降 ;而黄龙山区和巴山北坡种群的聚集强度随年龄增加而增强。栓皮栎种群生物学和生态学特性与环境因素共同作用是种群分布格局形成的主要因素 ,人为干扰对分布格局具有重要影响。根据环境条件和种群动态规律实行不同的经营方式是实现栓皮栎林持续利用的根本性措施

Abstract:In this paper,coefficient of similarity analysis was used to study flora similarity of mountain bryophyte in Xinjiang.The results show that the similarity of bryophyte vegetation between Tianshan Mountains and Altai Mountains is the highest one,among thre

Abstract:利用最小平行进化法对蒙古高原绣线菊属植物进行了分支分类研究，将本属植物分为4个组、6个系。其组的进化顺序为：Sect.Spiraea→Sect.Calospira→Sect.Glomerati→Sect.Chamaedryon。本属的进化趋势为冬芽芽鳞由数枚减少到2枚，花序由总状圆锥花序→复伞房花序→伞房花序→伞形花序。研究认为绣线菊属是泛北极起源。

Abstract:Isolation of the putative reactive oxygen species-insensitive mutants (\%ros\%) and characterization of mutants were performed by using root-bending assay and genetic analysis in Arabidopsis thaliana.10 -4 mol/L H 2O 2 was established for screening-c

Abstract:A heavy metal responsive gene PvSR52 was isolated from a mercuric-chloride-treated bean (Phaseolus vulgaris L.) cDNA library by differential screening using cDNAs derived from treated and untreated plants.The PvSR52 cDNA,which contained only 281 bp,was no

Abstract:The use of randomly amplified polymorphic DNA (RAPD) to study genetic variability of six halophilic species in Dunaliella by using 20 arbitrary primers is demonstrated.Six available primers can repeatedly amplify 98 DNA fragments,in which there are 95 pol

Abstract:The activity and ultrastructural localization of peroxidases were studied in wheat leaves with different degree of disease resistance to stripe rust by cytochemical method.In the leaves of both resistant and susceptible cultivars,the peroxidases were main

Abstract:应用在小麦品种烟农15与中间偃麦草杂交的五个世代群体中直接筛选2n=22Ⅱ植株的方法，获得11个双体异附加株，分别命名为DAL1、DAL2、……、DAL11。双体异附加株的细胞学稳定性较强，外源染色体传递频率高。形态学和细胞学鉴定结果表明：DAL1、3、5、6、8、9、10、11等8个异附加系中附加的可能是中间偃麦草第2部分同源群的染色体。 其中，DAL5、9、10、11是同一种异附加系，DAL6和DAL8为同一种异附加系，DAL3可能与之相同；DAL1与上述7个异附加系均不同。DAL2和DAL4可能分别附加了中间偃麦草第5部分同源群的1对染色体，但二者在形态上存在差异。DAL7可能附加了中间偃麦草第7部分同源群的1对染色体。旗叶卷曲是异附加系DAL、3、5、6、8、9、10、11共有的形态标记。11个异附加系可作为进一步研究和转移中间偃麦草有益基因的良好中间材料。

Abstract:A cytological study of 11 Astragalus species from Northwestern China has been carried out in this paper.Out of which 9 have been karyologically analysed,A.cupulicalycinus and A.jiuquanensis are merely reported chromosome numbers.The numbers of all species

Abstract:Using DGD embedment-free technique,the distribution of cytoskeleton was investigated in plasmodesmata and cytoplasmic channels of onion pollen mother cells (PMCs).It was found that cytoskeleton filaments oriented in plasmodesmata,combining into a bundle,a

Abstract:Primary meristem of Cynomorium songaricum Rupr.is composed of protoderm,ground meristem and procambium strands that line a wavelike ring in the ground meristem.As the diameter of the stem increases,the range of the "wave" rises correspondingly,that is the

Abstract:With some Abbondanza nullisomic lines as females and partial amphiploid Zhong No.4 as male,one wheat-Th.intermedium derivative line "N9025-3-3-2-1-1" with stripe rust resistance was produced by nullisomic baccrossing.It has been morphologically and cytolo