Abstract:Conventional paraffin sectioning was adopted to conduct the anatomical examination of the officinal organs of Houttuynia cordata ,stems, rhizomes and leaves. Special subepidermal cells were found to exist beneath the epidermises of H. cordata stems and le

Abstract:The developments and anatomical structures of the scapes of two garlic cultivars were compared through morphological examination and paraffin sectioning.The results indicated that(1) "Longxianhuosuan" presented more regular and more densely-arranged epide

Abstract:对东北雷公藤苇次生木质部结构及其与卫矛科其它属进行比较研究，为东北雷公藤生药鉴定提供了理论依据。结果表明：东北雷公藤茎次生木质部早晚材导管分子大小差异极大．为环孔材；导管分子穿孔板均为单穿孔板；异型Ⅱ-b射线；纤维管胞具螺纹增厚；具分隔木纤维。

Abstract:The paper reports nucleotide sequence and correspondingly deduced amino acid sequences of calmodulin in Alpinia oblongifolia as well as temporal and spatial expression models of calmodulin detected in Artemisia halodendron flowers by in situ hybridization

Abstract:以萌发种子根为材料,研究预处理取样时间和预处理药剂对甜瓜染色体制片的影响.结果表明,上午8:00左右为最佳预处理取样时间,可以观察到近14%的中期分裂相;在4种药剂预处理活体根尖中,以添加对二氯苯(饱和)的放线菌酮(40 m g.L-1)水溶液的效果最佳.用此方法对厚皮和薄皮两种类型甜瓜进行核型分析,结果发现:两类甜瓜核型相似,都具有一对随体,核型均为2A型,核型公式均为2n=2x=24=14m+10st(2SAT).但两类甜瓜的染色体总长、平均长度以及随体在染色体上的分布都不相同.

Abstract:Using Agrobacterium rhizogene ATCC15834,the study transformed Reynoutria japonica to probe the factors affecting the induction of its hair-like roots.The results revealed that the mature leaf blades were the explants with high transformation frequency,whi

Abstract:The restorer gene of the restorer Rk5451 of the male sterility line ms(Kots)-90-110 belonging to Nian-type wheat were located by RAPD molecular marker.Rk5451,a high parental material with high fertility-restoring capacity,was chosen as the male parent to

Abstract:With their pollination assisted by bracteal leaf opening,Zea luxurians,an annual quasi-corn diploid,was crossed with the inbred lines of common corn.Tasseling and silking times,pollen-dispersing,plant heights,heights to ear position and tillers of the F_1

Abstract:Peganum harmala extract at different concentrations was used to soak wheat seeds in order to study its effects on the growth and antioxidase activity of wheat seedlings. The results showed that the seedlings from the seeds soaked with P. jarmala presented

Abstract:以铁皮石斛的茎尖为外植体,诱导产生原球茎,进一步培养形成幼苗.结果表明:原球茎诱导以1/2 M S+6-BA 0.3 m g.L-1+KT 0.1 m g.L-1+LH 1.0 g.L-1为最优,而生根培养以M S+NAA 0.05 m g.L-1+KT0.1 m g.L-1+叶酸2.0 m g.L-1+L a稀土10 m g.L-1为佳.对铁皮石斛试管苗营养器官及原球茎的解剖学研究表明,根由复表皮、皮层和维管柱组成,皮层发达,初生木质部五原型,中央具髓;茎由表皮、基本组织和散生维管束构成;叶为等面叶,在上下表皮处分布有厚壁组织;原球茎是由顶端分生组织后面的薄壁细胞脱分化形成胚性细胞经球状胚发育而来.

Abstract:With 17 Eupatorium adenophorum Spreng.materials collected from Yunnan,Guangxi,Guizhou and Sichuan of China,and Australia,which suffer severe Eupatorium adenophorum infestation,as the study subjects,the study used artificial climate chamber and member-func

Abstract:Enzyme-linked immunosorbent assay(ELISA) was adopted to determine the contents of endogenous ABA and GA_3 of maize embryos in their development and dehydration for studying their relationship with dehydration-tolerance formation of the embryos.The results

Abstract:比较研究了4个二价金属的氯化盐(CaCl2、MgCl2、CdCl2和CuCl2)对玉米幼苗生长和生理特性的影响.用10 μmol·L-1 CdCl2和CuCl2处理10 d明显减少玉米幼苗根系和地上部干物重,抑制根系伸长生长.同时,叶绿素含量、叶绿素a/b比值、Fv/Fm、F0、Fm、qP、qN和Yield(实际量子产额)都呈明显下降;而抗氧化系统酶(SOD、CAT、POD、GR和APX)活性明显上升.10 μmol·L-1 CdCl2处理下叶绿素含量、Fv/Fm、qP、Yield、还原型GSH含量以及抗氧化酶活性均高于10 μmol·L-1 CuCl2处理.10 μmol·L-1 CdCl2处理还明显降低叶片水势和蒸腾速率,增加叶片气孔阻力,表现出水分胁迫;而10 μmol·L-1 CuCl2处理对叶片水势和蒸腾速率没有显著影响.10 μmol·L-1 CaCl2处理显著增加叶绿素含量和根系净伸长,10 μmol·L-1 MgCl2也增加根系净伸长,但10 μmol·L-1 CaCl2和MgCl2处理对叶绿素荧光参数、水分和抗氧化系统等指标均无明显影响.

Abstract:和4月20日（正常播期）、6月15日（晚播）两个播期条件下．对棉花1～4果枝1、2果节棉铃及其对位果枝叶于花后15d和30d涂抹外源生理活性物质：6％蔗糖和0．6％符氨酰胺混合溶液（C＋N）、2％蔗糖和0．2％谷氨酰胺混合溶液（1／3C＋1／3N）及12%蔗精和1．2％谷氨酰胺混合溶液（2C＋2N）．各浓度处理的C／N比值相同。统计正常播期铃龄50d和纤维加厚发育期（铃龄25～50d）日均温分别为28．5℃、28．1℃．晚播铃龄50d和纤维加厚发育期日均温分刖为22．9℃、21．4℃（超过了相应的临界温度21℃和18℃）。试验结果表明．晚播条件下，花后15dC＋N处理以及花后30d 2C＋2N处理促进了氮和可溶性糖的运转．均使铃重增加最大，分别达0．40g和0．58g。3种浓度外源生理活性物质均增加了纤维素的累积量．且于花后30d促进了螺旋角（φ）和取向分布角（ψ）的优化．提高了纤维比强度．其中以2C＋2N处理提高纤维比强度幅度最大．达1．45cN／tex。花后15d以1／3C＋1／3N处理对提高纤维比强度最有利．达2．10cN／tex。

Abstract:Soil Phosphorous deficiency and low phosphorous use efficiency are one of the limiting factors in modern agriculture and so it is the effective approach of improving phosphorous use efficiency to breed and adopt the soybean varieties with high phosphorous

Abstract:主要研究了不同施肥处理(肥料种类不同和施肥量配比不同)对温室樱桃番茄果实和土壤硝酸盐含量变化的影响.结果表明:不同施肥处理果实中硝酸盐含量随追肥次数的增加,逐渐加大,到采收中期达生育期内最大值,最终略有累积;果实中硝酸盐含量为49.6~273.0 m g.k-g 1,亚硝酸盐含量为0.011~0.054 m g.kg-1.第4次追肥后果实与土壤(0~40 cm土层)中硝酸盐含量在追肥后6~9 d达最大值,以后开始下降.果实内硝酸盐的累积量与土壤硝酸盐含量成显著正相关.合理的氮肥施用量不会造成果实内硝酸盐含量的过量累积;有机肥配施适量化肥对改善果实品质、提高果实产量、调节土壤硝酸盐含量变化有着很好的效果.

Abstract:在温室盆栽条件下,用NaCl处理新疆长果阿月浑子与美国品种Kerman,处理浓度为50、150、250和500 mmol·L-1,盐处理后5、10、20 d分别取叶、茎和根,测定各器官中Na+、K+含量及Na+/K+变化规律.研究结果表明,随着土壤盐浓度的增加,长果阿月浑子和Kerman的叶、茎和根中Na+离子含量在盐处理5、10、20 d后每个处理都表现出升高趋势;而两个品种的叶、根和茎中的K+含量在盐处理后其变化规律都不稳定.长果阿月浑子叶片、茎和根系中Na+/K+的比值在盐处理5 d和10 d都升高.Kerman的叶和根系中Na+/K+比值在处理5、10、20 d后升高;茎中Na+/K+处理10 d后升高,但20 d后没有明显变化.实验结果表明NaCl胁迫后,长果阿月浑子的叶片中Na+含量增加幅度均大于Kerman,Kerman根和茎中的Na+含量增加幅度大于长果阿月浑子;NaCl胁迫5 d和10 d后,长果阿月浑子叶片中的Na+/K+的比值高于Kerman,Kerman茎和根部中的Na+/K+的比值高于长果阿月浑子,表明了长果阿月浑子和Kerman都具有一定的耐盐性,但Kerman的耐盐性强于长果阿月浑子.由于叶片和根中Na+和Na+/K+比值的变化很稳定,可以确定为阿月浑子主要抗盐指标,茎中Na+/K+的变化规律较稳定,可以作为抗盐性参考指标.

Abstract:从新疆帕米尔高原采集豆科植物根瘤，经分离纯化获得68株供试根瘤菌，并选取36株参比菌株，进行唯一碳源利用、唯一氮源利用、对抗生素和染料抗性、耐盐性、初始pH生长、温度生长范围及石蕊牛奶反应、氧化酶、过氧化氧酶、脲酶共117项生理生化性状测定，并进行比较分析。结果表明：帕米尔高原豆科植物根瘤菌在碳氮源利用、抗生素敏感性、对染料抗性程度等方面存在着差异。该地区豆科植物根瘤菌均能耐受低温，并具有较强的耐盐、耐碱能力，所有供试菌株均能在初始pH9～12的YMA培养基上生长，84．7％的菌株能耐受3．0％的NaCl。从数值分类树状图可见，在86％的相似水平上未知菌株构成了4个新的表观群。第Ⅰ、Ⅱ、Ⅲ、Ⅳ类群分别有19、5、6、8株菌，中心菌株分别为NWHQLP412、NWHQLP481、NWTX1901、NWTX952。

Abstract:In terms of such landscape patches as piedmont proluvial fan,terrace land by river,sand dune,inter-dune lowland Gobi and salt mash,the mechanisms of natural vegetation regeneration was preliminarily explored in arid desert regions by field survey and data

Abstract:通过对科尔沁沙地流动沙丘上先锋植物差巴嘎蒿的种子散布格局及机理的实验研究,主要得出以下结论:差巴嘎蒿母株向不同方向散布的种子,其数量与距离存在明显的差异.母株向西南方向散布的种子数量最多,种子累积数量高达4 590±1 260,比其它各方向多29%至12倍.向北方向散布的种子数量最少,距离最短,种子累积数量为344±44,距离仅在100 cm的范围内.不同方向差巴嘎蒿种子散布的密度均随着散布距离的增加而呈对数关系减小,表现出显著的相关性.不同方向差巴嘎蒿远离母株的种子散布密度与累积面积之间存在显著的相关性,其间关系可用对数曲线来描述.结果显示,差巴嘎蒿向不同方向散布的种子密度均随着累积面积的增加而增加.

Abstract:There are sixteen parameters in the branching architectures of desert plants such as branch length and branching angle at different branching levels,branch-stem ratio,stepwise bifurcation ratio(SBR),overall bifurcation ratio(OBR),branching dimension and f

Abstract:The numbers,biomasses and variance coefficients of the genets,ramets and tillers,three hierarchical architectural grading components components of Kobresia humilis,the edificato of the meadows in alpine and cold regions,were studied under grass-cutting tr

Abstract:为阐明秦岭冷杉种群分布格局动态特征，达到有效保护和恢复的目的，通过野外调查，采用相邻格子样方法，离散分布拟合、扩散系数、Morisita指数、均方-曲线等方法，对不同生境和年龄阶段的秦岭冷杉种群的空间分布格局及其动态进行了系统研究。结果表明：（1）秦岭冷杉种群空间分布格局在不同发育阶段和不同生境条件下基本属于聚集型分布，在25m^2、150m^2和300m^2的面积上聚集强度较大。天然条件下，种群聚集强度最大取样尺度，可能是其种群更新的最佳面积。（2）秦岭冷杉种群空间分布格局随海拔上升，聚集强度降低；聚集强度在海拔1300～1700m较小，在海拔1700～2100m地区较大；阴坡种群分布聚集强度大于阳坡。（3）随着种群年龄增加，分布格局由聚集型向随机型过渡，聚集强度减弱；聚集性最强的尺度规模在幼、中龄期为50m^2，老龄期为300m^2。（4）种群的空间分布格局与生物生态学特性、生境条件关系密切。在未来森林经营和种群恢复中，应针对生境和种群年龄，森林抚育管理作业面积应该尽量接近聚集强度最大的尺度。低海拔和阴坡应该适度间伐非目的乔木树种，高海拔和阳坡地区，应适度清理灌木和草本层，为群落内团块状更新创造空间；实行就地保护，减少人为干扰，促进天然更新保护策略。

Abstract:The individuals of same communities display trait differentiation under different environmental conditions to certain extent ,and the trait differences of the communities that result from geographical differences of the communities reflect the evolution w

Abstract:The paper reported the study of the types and flora of liverworts in the Daweishan Nature Reserve of Yunnan Province by field surveying and data refereeing. The study reveals that there are 43 species of liverworts in the nature reserve, which belongs to

Abstract:The paper defines Thermopsis lupinoides(L.) Link by means of its specimens and wide field surveys,recognizes the specific taxon Thermopsis lupinoides(L.) Link and identifies its nine new synonyms.

Abstract:Supersonic water extraction ,supersonic ethanol extraction ,hydrothermal refluxing extraction and ethanol thermal refluxing extraction were screened with Cordyceps militaris to find out which of them would be the optimal method to extract cordycepin and p

Abstract:以番茄（Lycopersicon esculentum）叶为材料．分别采用溶媒萃取、水蒸气蒸馏、气体吸附法收集挥发性物质；气相色谱-质谱联用技术分离鉴定挥发组分。结果表明，3种收集方式共获得19种挥发性组分．其中的14种组分相同．且多为主要组分。水蒸气蒸馏法获得的挥发性物质总含量最高，为27．13μg FW；其次是气体吸附法．为23．38μg FW，溶媒萃取法获得的最少，仅为12．40μg FW。溶媒萃取法共获得15种挥发组分．含量最高的组分为β-水芹烯。水蒸气蒸馏法获得18种组分．含量最高的组分为（E）-2-己烯醛。气体吸附法获得17种组分．含量最高的组分为（E）-2-己烯醛。不同方法所获各组分的相对含量和绝对含量均不同．可根据研究目的综合分析运用。

Abstract:Supercritical fluid extraction and gas chromatography-mass spectrometry were employed to assay the lipsoluble chemical components in Semen Firmianae and NIST spectral database were used to analyze and identify these components. Ten constituents were isola

Abstract:根据桃开花对气候条件的要求及桃始花期资料，分析得出日平均气温稳定通过10℃初日与桃始花期基本吻合，相关系数为0．9853（n=15）。在历史气候资料基础上，运用周期分析方法对日平均气温稳定通过10℃初日进行预报。结合当年的天气特点进行上海地区桃始花期预报，2002～2004年预报平均误差为2．3d。

Abstract:The capabilities of grafted seedling and scion-root seedling of eggplant were comparatively studied.The results showed that the functional leaves of the seedlings grafted at different growth states presented a significantly higher net photosynthetic rate

Abstract:研究了纳米TiO2和负碱Pd纳米TiO2对蓝藻生长抑制的影响。结果表明，在太阳光照射下，载Pd纳米TiO2能够破坏蓝藻藻囊．与纳米TiO2相比，载Pd纳米TiO2能够更有效地使蓝藻内叶绿素含量、光合速率和呼吸速率以及氧化物歧化酶（SOD）活性降低，超氧自由基增多。研究证明，载Pd纳米TiO2的载Pd量选择1％为最佳。

Abstract:The paper systematically discusses the mechanism for glycinebetaine to improve plant salt resistance and its research advances in genetic engineering at home and abroad as well as summarizing the research progresses about the key enzymes and their genetic

Abstract:It always is a hotspot of plant researchers' concern to make plants to improve their own adversity-resisting capability and physical methods has gotten more and more widely adopted in this field.The paper fully summarizes the uses of electric field,magnet

Abstract:Orchidaceae plants form one of the biggest flowering-plant families and much attention has been paid to them in the world. The researches about the classification and identification of their species and varieties have provided an early ,subservient and se

Abstract:The paper summarizes the latest research advances in Chimonanthus praecox(L.) Link community ecology in terms of community distribution and environment,flora composition,appearance and structure,population structure,and physiological and ecological factor

Abstract:The paper introduces the progress in protoplast research of Compositae plants with emphasis on protoplast isolation and culture,factors affecting protoplast regeneration,variances of protoplast-regenerated plants,protoplast utilization,and points out curr

Abstract:Plants have evolved a series of defense strategies against the invasion of various diseases and resistant genes play a crucial role in these strategies. The research about resistant genes of crops has made great progress and become a hotspot in the field