Abstract:利用在禾谷类作物中表达效率较高的启动子Ubi对含目的基因sgna的现有载体进行了改造，并引入筛选标记基因bar；为提高目的基因的表达水平，在目的基因5′端引入了Ω和kozak序列，3′端引入了poly(A)序列，成功构建了适用于小麦的抗虫基因植物表达载体pGU4AGBar和pGBIU4AGBar，基因pGU4AGBar含有顺向连接的Ubi-sgna及Ubi-bar基因表达盒，pGBIU4AGBar含有T-DNA边界序列，并在其左右边界中间插入了含有顺向连接的CaNV35S-nptⅡ，Ubi-sgna和Ubi-bar基因表达盒，人工合成的雪花莲外源凝集素基因sgna可以编码对同翅目昆虫具有毒杀作用的蛋白。

Abstract:Using a high efficient rice transformation system mediated by Agrobacterium tumefaciens ,a bacterial blight resistance gene Xa 21 was introduced into calli of a japonica variety Yujing 6 cultivated in Huanghuai area,and transgenic plants were obtain

Abstract:用带有ACC脱氨酶基因和卡那霉素抗性基因（NptⅡ，作为报告基因）的工程根癌农杆菌转化白兰瓜子叶。通过组织培养，得到具有卡那霉素（Km)抗性的再生小苗，经NptⅡ报告基因的PCR扩增，ACC脱氨酶基因的Southern点杂交以及ACC脱氨酶活性的生理生化检测可知，ACC脱氨酶基因已成功转入白兰瓜子叶再生小苗，而且不同植株的真叶中表现出不同水平的ACC脱氨酶活性。

Abstract:利用RT-PCR的方法，从豇豆种子，子叶及成熟叶片中分别提取RNA，反转录后以该基因两端的保守序列为引物进行PCR扩增，PCR产物与pUCm-T载体连接进行克隆，蓝白筛选重组子，经测序，其核苷酸同源性高达100%，蛋白质同源性达91%。本试验同时对该基因的表达时期差异进行了大致检测。结果是种子的表达量最高，子叶其次，成熟叶中最低。

Abstract:在数量性状水平上，调查了43个春小麦品种的19个数量性状，利用主成分分析法计算品种间的欧氏平方遗传距离。并在此基础上用最小方差法做了聚类分析。发现43个品种间在数量性状水平上的遗传距离变异范围很大（0.926-67.942)。平均遗传距离为18.000,说明供试品种的19个考察性状上存在较大的表型变异，从聚类结果来看，地方品种基本上被聚在一起，说明地方品种同引进品种和育成品种至少在表型上存在较大差异。从20世纪40年代以来，在数量水平上甘，青两省春小麦地方品种间的遗传多样性水平最高（GD=31.389),其次是20世纪50年代引进品种（GD=26.308)，而育成品种间的遗传多样性水平最低，总体上呈下降趋势，说明随着育种进程的深入，作为育种目标追求的经济性状趋于一致，其变异集中在一个狭小的范围之内。品种间的遗传多样性下降。

Abstract:The fertility of 211 hybrids (F 1) derived from five male sterile lines of wheat with Ae.bicornis Cytoplasm,namely ms(bicor) 8222,ms(bicor) 83(37)65,ms(bicor) yanshi 9,ms(bicor) 80(6)and ms(bicor) 90 110,with some wheat varieties or lines and p

Abstract:The 35 morphological and anatomic traits of 19 species of Calligonum L.from China were studied.The multivariate analyses of morphological characteristics were compared using MANOVA and principal component analysis (PCA).All numerical characters among

Abstract:RAPD analysis was applied to 12 species of Allium in order to investigate the relationship between species.The result illustrated that there were abundant polymorphism between the 12 samples,and the range of genetic distance was from 0.250 0 to 0.78

Abstract:对栓皮栎种群的地理分布和生物学，生态学特性进行了研究。结果表明：（1）栓皮栎幼苗期地上部分生长缓慢，而主要发育根系；（2）栓皮栎的有性生殖和无性生殖都受到人为干扰的强烈影响；无性繁殖在林分更新中占有重要的地位，而有性繁殖则是维持和丰富种群遗传多样性的基因；（3）栓皮栎喜光，但对温度，降雨和土壤要求并不严格；（4）通过对优势种群重要值进行聚类分析。可以将陕西栓皮栎种群所在群落划分为6个类型；（5）栓皮栎具有很强的适应性，是我国分布最广的树种之一。垂直分布幅度范围较大，分布的海拔上限自北向南，由东向西不断升高。

Abstract:According to the analysis of the vegetation characteristics of Zhifanggou watershed in Loess hilly region,this paper argued the phenomena and the mechanism of edge effect and the conduit of the ecotone,and suggest that it is helpful to resolve the argumen

Abstract:The discharging coal dust field of a firepower plant often lies in plain district,whose area is large and remain period is long.Cluster Analysis,ANOVA and Correlation Analysis were used to research the influence of Mayi discharging coal dust field to t

Abstract:皖南齐云山区地处中亚热带，自然条件较为优越。蕨类植物丰富，初步统计显示，该山区共有蕨类植物29科，54属，91种9包括亚种和变种），区系综合系数为-0.592。在相比较的7个山地区系中位居第五，通过对区系组成，性质和特征的分析。表明该区系地理成分复杂多样，属，种均可划分为12种类型（变型），具有较强的亚热带特性；在区系关系上，该区系与黄山，九华山，天目山，庐山区系关系较为密切，而与武夷山，秦岭，长白山区系关系较为疏远。

Abstract:Eight triticinaes were treated with iso osmotic NaCl and PEG solutions.The leaf relative water content,stress susceptibility index,the content of praline,soluble sugar,Na +,K + of leaf and chlorophyll fluorescence parameter Fv/m were determined in 3,6,

Abstract:In the course of keeping pea( Pisum sativum L.) seeds containing different water content in saturated steam for seven days,the translation of amylase longevity mRNA in the cotyledon was limited when the seeds water content below germinated critical wate

Abstract:研究了保水剂对干旱胁迫下刺槐叶绿素a荧光动力学参数的影响。结果表明，在干旱胁迫下刺槐叶绿素a荧光动力学参数Fv/Fm,δPSⅡ，qp，NPQ均有所下降，且随着保水剂用量增大，下降程度减小，即保水剂用量越大，对受刺槐干旱胁迫的缓解作用愈明显。保水剂不同水平处理对刺槐叶绿素荧光参数的影响达到显著水平。多重比较结果表明，土壤中保水剂用量只有在不低于0.5kg/m^3时才能有效地发挥抗旱作用。

Abstract:The result shows:It can raise seedling apparently,ability of fighting drought and growth,to dip in the afforestation of thick liquid with RPA;Dress and soak seed handling,can strengthen seed vigour,raise emergence rate and sprout rate,make sprout even spr

Abstract:Air dried seeds of two species of Celosia cristata L.were carried by a high altitude balloon (CHAB) for space mutation,flying to an altitude of 40.112 km from sea level for about 4 hours.The treated seeds were cultivated on the ground and the inflor

Abstract:在深达50-60cm的有效土层中，研究了矮化砧M26不同利用方式对富士苹果树根群分布及生育的影响。结果表明：（1）M26作中间砧用时因栽植深度不同，富士苹果树的根鲜重，干重均增加，树势健壮，T/R也高；（2）M26作砧木用的长度不同，富士苹果树地下，地上部生长各异，砧木微乎其微三的根鲜重，干重比砧木长度长的增加，T/R率下降，但矮化效果不明显；（3）根群的水平分布，栽植深度深的主要集中在距主干80-100cm的范围内，栽植浅的集中在距主干60-80cm范围内，砧木长度长的主要集中在50-60cm范围内，砧木长度短的主要集中在70-80cm范围内，两种方式的根群水平分布行间大于株间；（4）根群垂直分布主要集中在0-60cm的土层中，占根系总量的96%以上，根群密集区分布于20-40cm的士层中，占总根量的70%以上。

Abstract:研究了1-MCP处理对“秦光”油桃果实硬度，呼吸，乙烯，EFE活性的影响。结果表明：1-MCP处理可抑制油桃果实乙烯的合成，显著地降低了乙烯峰值，仅为对照的一半，推迟了乙烯峰和呼吸峰的出现，但提高了呼吸峰值，延缓了果实硬度的下降，介对EFE活性无明显影响。

Abstract:在河北保定生态条件下，研究了京、冀，鲁，豫等北方小麦主产省份近年来育成的15个小麦推广品种的16种品质性状和产量表现。结果表明；这些品种可分为2大类，第1类为优质型品种，加工品质表现较好，其中豫麦34表现既优质又高产，中优9507具有突出的优良品质特性；第2类品种为高产型品种，产量高但品质性状较差，不同性状具有各自的遗传变异特点，仍需要通过各种途径扩大和丰富我国小麦育种材料品质和产量性状的变异性，沉降值作为重要品质性状，遗传力较高，与大多数面粉，面团品质参数显著相关，在育种早代选择中应予重视，基于所有品种的相关分析得出产量与沉降值，粉质仪测定参数存在负相关，但以10个优质品种为材料的分析结果表明，产量与品质性状以及品质必状间的不利相关被打破，使对生产有利的性状得到了协调与结合改良。

Abstract:The content of pentosan in 8 winter wheat varieties was determined in 1999-2000.The average content of different varieties varied from 6% to 9%.Significant differences were found in both pentosan content of different varieties and different ecological env

Abstract:Four sites which depend on different altitudes along northern slop of Daban Mountain were used to investigate the impacts of altitude on Sedge family herbage vitro digestibility.Every 200 m of each site were choosed along northern slop of Daban Mountain w

Abstract:以葡萄，鲜枣为材料研究了果实采且贮期ABA的变化与呼吸非跃变性，结果表明；葡萄，鲜枣均为呼吸非跃变型果实，贮期ABA的变化呈抛物经形，有明显的高峰出现，对于呼吸非跃变型果实，ABA尽管不导致呼吸高峰的出现，但贮期ABA峰值高的果实，呼吸强度高，三碘苯果酸处理后低温贮藏葡萄，鲜枣，抑制ABA形成作用明显，具有良好的保鲜效果。

Abstract:Growing character of sugar beet leaf in dry land one influence of cutting different leaf groups on beet root yield,sugar content,microstructure of beet root were studied.The results showed that No.10 to No.30 leaves,charactered with longest growimg period

Abstract:The flowering characters and the changeable structure of lodicule were studied during the flowering compared the fertile line and the hybrid wheat with the male sterile line in wheat ( Triticum aestivum L.),the results were as follows:(1) A floret in t

Abstract:对番茄皮红素的提取及其稳定性进行了初步研究。结果表明，该色素具有较好的耐热性，耐氧化性，耐还原性；Fe^3 和Cu^2 对色素的吸光值有较大影响；进行酸碱处理时，其耐酸性较差；日光和紫外光可导致其稳定性下降。

Abstract:对植物生长延缓剂多效唑 ( PP333)影响水稻幼苗抗低温能力进行研究。结果表明 ,用PP333浸种后在水稻培养液中培养 1 0 d的幼苗 ,经 ( 4℃± 0 .5℃ )低温胁迫后 ,能有效地降低相对电导率 ,维持较高的 SOD活性 ,提高 CAT、POD活性 ,减缓 MDA的积累。PP333处理使低温下的水稻幼苗维持较高的游离脯氨酸含量 ,延缓幼苗生长 ,使幼苗生长健壮

Abstract:The Aralia saponin was extracted from the skin of Aralia chinensis with alcohol as extractant in this paper,the influences of some factors granule of raw material,content of alcohol,extracting temperature and time,ratio between raw material and s

Abstract:The metal elements in Pyrus xerophila were measured and analyszed with ICP.The result shows that it contains several kinds of race elements necessary for the human body,such as Fe,Mn,V,Cu,Zn,Ni,Co and so on,some race earth elements benefit for the hu

Abstract:Many years ago,transition metal such as copper or zinc was postulated to be required for ethylene perception.Recently,biochemical and genetic studies on Arabidopsis provided solid evidences that copper plays a critical role in ethylene perception.RAN1

Abstract:AM fungi are the widely distributed soil microbe,which can promote host plant to take up mineral elements from soil,regulate metabolism action inside the host plant,and enhance anti reversibility of plants,and promote plant growth,and increase yield of

Abstract:Status and potentiality of applying DNA molecular markers to genetic study on wheat stripe rust was summarized in this paper.It involved gene marker,gene cloning,gene mapping and marker assisted selection and so on.At the same time,some typical examples

Abstract:The development of plant virus gene vectors is attractive biotechnological tools for expression of foreign genes.The benefits of virus based gene expression vectors include rapid and convenient engineering coupled with flexibility for expeditious applica

Abstract:The reaction of physiology biochemistry and molecular of horticultural plant and drought tolerance mechanism under water stress were summarized.Some problems needed to be studied were given.

Abstract:The research of plant crown gall is introduced.Growth and modulation of crown gall and crown gall genesis genes and affectors are all reviewed in this paper.

Abstract:This paper deals with the megasporogensis,the development of female gametophyte of Manglietia insignis ,a endangered species in China.The ovule of M.insignis is anatropous,bitegmic and crassinucellate.The obturator was observed.The chalazal functio

Abstract:The structure of atigma and style of buckwheat ( Fagopyrum esculentum Monch.) were observed through light and electron microscope,and the ultracytochemical localization of ATPase activity was carried out in those cells.There are no papillae on the surf

Abstract:用透射电镜对芍药（Paeonia lactiflora Pall)雄配子体发育进行了研究。结果表明，芍药的小孢子母细胞在减数分裂末期Ⅰ时不形成细胞板，在减数分裂前期Ⅱ形成细胞器带，胞质分裂为同时型，生殖细胞刚形成时有呈PAS正反应的拱形壁，当生殖细胞还未完全脱离花粉内壁时，质膜间的壁物质消失，营养细胞中的脂体沿双质膜规律分布形成一单行的脂体带，在二胞花粉晚期，脂体带包围生殖细胞，形成脂体冠，花粉成熟时，包围生殖细胞的脂体消失，生殖细胞与营养核贴近，构成雄性生殖单位，成熟花粉为二细胞型。