Abstract:Data of more than 200 landraces and bred varieties of spring wheat,which have been planted in Gansu and Qinghai Provinces since 1940s widely,were analyzed to determine the genetic diversity of spring wheat in this region.The results show that there exist

Abstract:Simple sequence repeats (SSR) was employed to investigate the genetic variation among 15 maize elite inbred lines in China.Forty SSR primers selected from all sixty two primers gave stable profiles amplified in the sample of 15 inbred lines,which could c

Abstract:SSR (Simple Sequence Repeats) primers were used to detect genetic diversity among 67 germplasm semi wild soybean.A total of 184 alleles were observed,the average number of alleles per locus was 15.41.And the average polymorphism information content,the a

Abstract:将外源DNA特别是牛胸腺DNA转移给普通小麦，对在其后代中选育出的矮杆变异体进行了RAPD分子验证及其遗传学分析研究，获得了3个主要结果：（1）对变异体D111，受体814527，供体矮孟牛I型进行的RAPD验证中，通过137个引物由5个引物检测出了DNA的多态性，表明矮秆变异体D111的出现可能是供体的片段DNA进入了受体并得到稳定遗传。（2）对变异体D011，D1453，受体814527，供体牛胸腺DNA进行的RAPD验证中，在供试的180个引物中，变异体，受体扩增产物的带型绝大多数一致而与供体则完全不一致，其中有很少引物对变异体和受体扩增产物的带型表现不同，还有个别引物对变异体扩增产物的带型与供体的个别带一致，由此说明亲缘关系极远的牛胸腺DNA导入受体引起的变异更为广泛和复杂；（3）3个矮秆变异体的遗传分析表明，控制其株高的基因位于核基因组，在杂种后代中表现了明显降低株高的作用，其杂种后代的某些农艺性状也表现良好，因此，利用它们进行杂交育种或在杂种优势的利用上，都将是有较好应用价值前途的新矮源。

Abstract:用压片法对八倍体小黑麦和八倍体小滨麦杂种F1的小孢子发生和雄配子体发育进行了细胞学观察.结果表明小黑麦/小滨麦F1 PMC MI染色体平均构型为13.17Ⅰ+20.82Ⅱ+0.37Ⅲ+0.02Ⅳ,与其理论构型基本一致.在三属杂种F1减数分裂后期Ⅰ可观察到较高频率的落后染色体;四分体时期的子细胞普遍具有微核;所形成的小孢子有部分能进行正常的有丝分裂,产生成熟的花粉,其成熟花粉的可育率为44.1%.在三属杂种F1的小孢子发生和雄配子体发育过程中,还观察到了一些特殊的细胞学现象在同一个细胞中的染色质活动不同步,小孢子发生对称的有丝分裂,四分体不能正常形成,以及小孢子无丝分裂等现象.

Abstract:Analysed the HMW glutenin subunit composition of 250 wheat materials and ten of the industrial quality characteristics of 66 materials of them.The results of statistics indicated that there were significant linear relationships between HMW glutenin su

Abstract:沙柳是毛乌素沙地流动沙丘和固定沙丘上广泛分布的重要固沙植物。叶片的光合速率呈现出不规则的日动态变化 ,在 1 0 :0 0～ 1 1 :0 0及 1 4 :0 0出现光合午休现象。蒸腾速率呈现出单峰型的日动态变化 ,蒸腾在午后 1 5:0 0达到最大。水分利用效率在早晨 9:0 0后保持在 2～ 2 .5μmol CO2 · mmol-1 H2 O左右。叶片水分亏缺也表现出规律性的变化。从早晨开始 ,叶片水分亏缺逐渐增大 ,在 1 8:0 0达到最大值。比较生长季节的不同时期环境因子的变化情况表明 ,春末的光照强度和气温比夏末高 ,但土壤水分含量则相反。沙柳在春末的光合速率、蒸腾速率分别是夏末的 79%和 72 .4% ,表明水分亏缺是影响沙柳生长发育的主要限制因素。沙柳在不同季节对水分的不同利用特点是对环境胁迫的弹性适应

Abstract:在气候箱中研究了土壤温度、气温对高山草本植物紫花雪山报春光合作用和蒸腾作用的影响。结果显示 :1 0℃～ 2 5℃土壤温度范围内 ,净光合速率和蒸腾速率及气孔导度和胞间CO2 浓度随土壤温度的变化为“单峰”曲线。“峰”值及其位置受气温影响。在 1 0℃～ 35℃气温范围内 ,净光合速率随气温的变化曲线为“单峰”型 ,蒸腾速率、气孔导度和胞间 CO2 浓度随气温升高既有增加又有减少 ,增加或是减少及变化速率与土壤温度有关。土壤温度和气温对光合作用和蒸腾作用都有影响 ,各因子对光合作用和蒸腾作用的影响受到另一因子的促进或制约。其中一因子处于不利状态 ,光合作用和蒸腾作用都将受到严重损害。土壤温度和气温分别为 2 0℃和 2 5℃时 ,紫花雪山报春叶片净光合速率最大 ,为 1 4 .67μmol CO2 · m-2 · s-1 。光合作用的最适温度范围是土壤温度 1 5℃～ 2 0℃ ,气温 2 0℃～ 2 5℃。经相关系数分析表明 :在不同气温条件下 ,土壤温度变化时净光合速率、蒸腾速率与气孔导度、胞间 CO2 浓度的相关性不同 ;在不同土壤温度条件下 ,气温变化时它们之间的相关性也不同。不同气温下土壤温度影响光合作用、蒸腾作用或不同土壤温度下气温影响光合作用、蒸腾作用的生理机制不完全相同

Abstract:用玉米作为实验材料进行分根实验。种子根平分在装有土娄土的分隔的白铁皮桶中。土壤容重分 4种处理 :低容重 (两边容重都为 1 .2 0 g· cm-3 )、中容重 (两边容重都为1 .33g· cm-3 )、高容重 (两边容重都为 1 .45g· cm-3 )和混合容重 (一边为 1 .2 0 g· cm-3 ,另一边为 1 .45g· cm-3 )。土壤水分控制在高基质势 (- 0 .1 7MPa)和低基质势 (- 0 .86MPa) 2个水平。结果表明 :当植株生长在高紧实土壤或土壤基质势从 - 0 .1 7MPa降到 - 0 .86 MPa时 ,根长和根干重都显著降低 ;紧实土壤使根长降低的同时还使根的直径增大。然而 ,当植株生长在混合容重土壤中时 ,处在低容重土壤中的根系生长得到加强 ,补偿甚至超补偿高容重土壤中根系生长的不足

Abstract:以典型冷敏性植物黄瓜和典型抗冷性植物菠菜为材料 ,研究了 5℃ 1 0 0μmol pho-tons· m-2 · s-1 低温弱光处理对 2种植物的活体和离体叶绿体类囊体耦联度的影响。结果显示 ,与 5℃黑暗处理相比 ,5℃下弱光 (1 0 0 μmol photons·m-2· s-1 )分别照射黄瓜和菠菜的叶片和离体叶绿体悬浮液 ,都使叶绿体毫秒延迟发光慢相强度以及类囊体耦联度显著降低。表明无论是冷敏性作物黄瓜 ,还是抗冷性植物菠菜 ,低温弱光处理叶片和离体叶绿体悬浮液 ,均可导致类囊体跨膜质子梯度显著降低

Abstract:田间条件下模拟20％平流层臭氧层衰减，紫外线（UV－B，280－315nm)辐射增强，研究了UV－B对2个大豆（Glycin max (L.)Merr.)品种黑豆和晋豆生长，光合作用和稳定碳同位素组成的影响，结果表明，晋豆比黑豆对UV－B有较强的抗性或不敏感，表现为增强的UV－B辐射显著抑制黑豆的生长和株高，叶、茎、根和总生物量以及株高全部降低，而晋豆仅茎重和株高降低；晋豆的色素含量（叶绿素a,b，类胡萝卜素和类黄酮）不受UV－B辐射影响，在UV－B辐射下黑豆的净光合作用，气孔导度，胞间CO2浓度和蒸腾作用以及不分利用效率明显下降，而晋豆只有气孔导度和蒸腾作用减少，这可能与晋豆本身含有较高的类黄酮及较多的表皮毛和遗传特性有关，用叶片稳定碳同位素组成（δ^13C值）的分析也证明晋豆对UV－B辐射不敏感，由此看来，大豆品种对UV－B辐射的反应差异可以通过δ^13C值来判定。

Abstract:In the course of keeping pea ( Pisum sativum L.) seeds containing different water content in saturated steam for seven days,the mobilization of the storage protein and starch in their cotyledon cannot be started when the seeds water content below germi

Abstract:3d的夜间低温（4℃）处理和恢复3d后，对人工模拟林下光环境的西双版纳热带雨林中层树种藤黄（Garcinia hanburyi)和上层树种团花（Anthocephalus chinensis)幼苗叶片中O2，H2O2，保护酶（SOD，CAT，APX）活性和膜脂过氧化产物MDA的变化过程进行了测定，研究结果表明，随着低温时间的延长，2种幼苗叶片H2O2，MDA含量和O2－产生速率上升，藤黄的保护酶活性也上升，但团花的保护酶（SOD，CAT）活性在第2天有所下降，低温消除后，藤黄的活性氧和MDA含量有所减少，团花变化不明显，这表明，热带上层树种团花和中层树种藤黄是以不同的方式响应低温，上层树种比中层树种受体温的伤害重。

Abstract:Wheat seeding and suspension culture cell of FengKang 8 are different in the soluble protein content and protein composition under water stress (-1.0 MPa PEG6000).Soluble protein content in seedling was higher than that in CK,and it decreased with the pro

Abstract:用改良的酸性电泳方法对L型杂种小麦及亲本三系的种子醇溶蛋白进行了研究，结果表明，用醇溶蛋白的酸性电泳可鉴别出杂种与父本及常规种之间的差异，而不能鉴别出不育系及相应保持系之间的明显差异。用酯酶，过氧化物酶，ATP酶的同工酶对供试材料幼苗做进一步检测，发现只有ATP酶同工酶能将L型不育系及相应保持系鉴别出来，单用同工酶法或醇溶蛋白电泳法都不能将L型杂种及亲本三系完全区分开。

Abstract:以陆地棉(Gossypium hirsutum L.)中棉所16和中棉所29号为试验材料,用垂直板培养法试验结果表明400 mg*L-1 甲哌钅翁(DPC)浸种处理显著促进棉花侧根发生,侧根原基发生量、发育速度和发生区长度都显著增加.去除侧根后,DPC增加侧根原基发生量和发育速度.在低温逆境情况下,DPC显著促进侧根发生,对增加抗低温能力有利.DPC处理提高了幼苗主根中部生长素、玉米素及其核苷含量,可能是诱导侧根发生的内在原因.

Abstract:从儿童食品中分离筛选到1株产碱性普鲁兰酶活性较高的菌株，编号为SX－12，初步鉴定为芽孢杆菌Bacillus sp.,研究了SX－12原生质体制备与再生最佳条件，其原生质体经紫外线诱变处理，选育出产碱性普鲁兰酶的高产菌株SX－12C67，酶活由出发菌株的2．42U/mL提高到6．87U／mL，提高了约1．8倍，在此基础上对产酶条件进行了优化，优化后的最佳发酵培养基为：可溶性淀粉3％，蛋白胨1．0％，酵母膏0．5％，K2HPO42％，MgSO4.7H2O0.05%MnCl20.0001%，最适p;H9.5，最适温度40℃，初步研究了酶的部分性质，酶反应的最适pH，温度分别为10．0－10．5和55℃，在55摄氏度反应条件下,酶在pH6.0-11.0的范围内都具有一定的活性，Ca^2 ,Mn^2 ,Mg^2 等离子是酶的激活性，Zn^2 ,Hg^2 等离子是抑制剂。

Abstract:a pot experiment was carried out to study the effect of amount of potassium application on AM fungus infection and inoculation biological responses with Glomus mosseae in unsterilized soil.The results showed that indigenous AM fungi have different inf

Abstract:The biomass of different organs and biomass distribution of Chinese fir treated with aqueous extracts of the Cunninghamia lanceolata,Schima superba,Castanopsis fargesii and Pinus massoniana under different concentrations after six years was measu

Abstract:The 2 years comparative research of the net gain tillers,leaves regrowth and cumulative yield for perennial ryegrass under different cutting intensities and cutting times.The results showed that the seasonal dynamics of net growth of leaves and net gain t

Abstract:Through the application of orthogonal experiments,a systematic research of the establishment of the leaf regeneration systems for Kiwifruit(Qinmei) was carried out.The optimal shoot differentiation medium and constituation of phytohormone for leaf is MS+6

Abstract:鹅观草属是禾本科小麦族中的最大的属，现知全世界有4组，20系，126种，分布于北半球的温带和寒带，中国有4组，18系，79种，主要分布于西北，西南，华北和东北，是鹅观草属植物种类最为集中的区域，尤其高原东北部的唐古特地区又是我国鹅观草属分布相对密集之地，有3组，12系，30种，而且其间不同等级，不同演化水平的类群均有分布，该地可能就是该属的现代分布中心，同时，唐古特地区多汇聚有鹅观草属不同等级的原始类群和与原始类群有很缘的短柄草属植物，其中最原始的大柄鹅观草特产于该区，而该区缺乏的是高级的大颖组类群，故推测唐古特地区可能又是该属的起源地，起源时间大约在青藏高原明显增高，气候转凉的晚第三纪初的中新世，鹅观草属起源后，在中国境内地质活动比较剧烈的地区得到了进一步的发展和分化，但只有少数适应性较强的类群大概以3条路径扩展到国外，并向东到在北美的巴芬岛，向西延伸到大西洋滨岸，向北进入寒冻的北极地区。

Abstract:The tropical geographical elements of the flora about of the seed plant in the Qinling Mt.is studied in this paper.The tropical geographical elements in this area belong to 6 categories,such as Pantropic,Tropical America and tropical Asia disjuncted,Old W

Abstract:The Taitong-Kongtong Mountain Nature Reserve in Gausu Province is located in the west of Loess Plateau.where plants resources are relatively abundant.According to preliminary statistics.There are 750 species (including varieties) wild vascular plant in th

Abstract:The flora of Yellow River Delta National Reserve Area was studied here and the result showed its characters as follows:less species in this area,only 193 species belonging to 123 genera of 43 families,obviously temperate nature in floristic components wit

Abstract:蜜环菌Armillariella mellea(Vahl.exFr.)Karst是一种与传统中药天麻（Gastrodia elata Blume)共生的药用真菌，从蜜环菌子实体中分离并鉴定了3个化合物，利用波谱（MS，NMR和IR）和化学方法分别鉴定为1个新C－18植物鞘氨醇型神经酰胺（2S，3S，4R）－2－（十六碳酰氨基）－十八碳烷－1，3，4－三醇（1），2个已知甾醇麦角甾醇过氧化物（ergosterol peroxide)及Ergosta-5,7-dien-3β-ol，这2个甾醇系从该属真菌中首次发现。

Abstract:建立了一种测定麦红吸浆虫中脂肪酸的微量气相色谱分析方法，该方法具有称样量小，操作简单，灵敏度高，重现性好等特点，称样量仅为3－5mg，各脂肪酸RSD均小于5．7％，用湿法研磨麦红吸浆虫以破碎细胞和提取脂肪，水溶浓缩提取液后进行甲酯化反应，上清液用于气相色谱分析，检出十种脂肪酸，主要脂肪酸有豆蔻酸，棕榈酸，棕榈油酸，硬脂酸，油酸，亚油酸，不同产地的红吸浆虫样品中C16：0，C17：1，C18：0，C18：2和不饱和脂肪酸含量存在明显差异。

Abstract:The calcium infiltration could significantly maintain the higher firmness of red Fuji apples,and the degree of browning of treated fruits was lower than the control clearly.The inhibition of calcium treatment on enzymatic browning influened polyphenol oxi

Abstract:Using axillary nodes as explants,a high frequency plantlet regeneration system induced by thidiazuron(TDZ) was established.After 8 weeks of culture on MS medium containing 1.0 mg/L TDZ,37.5 adventitious shoots per explant on average were achieved.Rooted p

Abstract:Genetic variability and genetic structure of 4 national chestnut populations in Shaanxi of China was investigated using isoelectric focusing in thin layer polyarcylamide slab gels at 20 loci coding for 8 enzyme systems.The result showed that the highest

Abstract:In the thesis,the biological property,identification and seperation of effective composition on Aconitum karakolicum Rap.were studied,12 epi napelline was seperated at the first time.The contents of songorone neoline and 12 epi napelline were high

Abstract:The determination of the amino acid in the seeds of the Celastraceae plants Euonymus phellomanus Loes., Euonymus nanoides Loes. et Rehd. and Celastrus hypoleucus Warb. produced in Gansu Province is reported.The result indicates that the kind of

Abstract:In this paper,10 families,11 genera,14 species of evergreen broadleaf woody plants in Qinling Botanical Garden were reported.Among them,1 family,2 genera,3 species were new records to the northern slope of Qinling Mountains.

Abstract:Apomixis is a mode of reproduction (asexual propagation through seeds) that exists in many plants from different botanical families.By producing crops that produce asexually through seeds,we can greatly hasten the development of new higher yielding hybri

Abstract:Plant lycopene cyclases (LYCs) are the key enzymes changing the linear lycopene into cyclical carotenoids.Cyclical carotenoids are not only important components in photosynthesis membrane of all plant,algae and cyanobacteria,but also important pigments ma

Abstract:种子球蛋白一直是人类食物的主要来源，随着对种子球蛋白药理作用认识的不断深入，近年来研究重点已从单纯的序列转向结构的研究，种子球蛋白二级结构（如α－螺旋和β－折叠）存在较大程度的相似性，具有较大的保守性且与蛋白质的特殊功能关系密切，而三级结构之间差异明显，属易变异区，主要与蛋白质的一般功能相关。

Abstract:The article mainly discusses about the effects of enhanced UV B on plant photosynthesis and the response and adaptation of plant under enhanced UV B circumstance with summing up the developing at home or abroad.Studies show that enhanced UV B can damag

Abstract:Biotechnique supplies scientific means for the new crops variety breeding in high yield,high resist and so on.The transgentic technique of plants are increasingly applying in basic molecule biology.With gene of different origin and functional are transfer

Abstract:A great progress of gene transformation technology has been made in commercially important apple cultivars and rootstocks in recent years.The paper introduced the present situation of its studies on gene transfer lines,reporter gene,selectable marker and

Abstract:The paper mainly introduces the development of wheat high molecular weight glutenin subunits (HMW GS) and their genes.At present,the wheat transgene technique has been becoming viable.The rapid development of molecular marker technique,especially the e

Abstract:The jacket cells are derived from cells surrounding the archegonial initials.When the central cell formed,the jacket cells are one layer,regularly arranged around the archegonia.During subsequent stages the jacket cells enlarged with increased lipid dropl

Abstract:采用常规石蜡切片法，观察了华山新麦草胚和胚乳的发育过程，结果表明，华山新麦草胚和胚乳的发育过程与一般禾本科植物基本相同，胚胎发生属紫宛型，顶细胞和基都参与胚体的形成，胚胎发育经过二细胞原胚，多细胞原胚，球形原胚，梨形原胚，分化胚和成熟胚阶段，成熟胚具有胚根，胚芽，盾片，胚牙鞘，胚根鞘，外胚叶等典型禾本科植物成熟胚的结构，胚乳发育类型为核型，包括游离核阶段，细胞化阶段和生长成熟阶段，待大量游离核形成之后才形成细胞壁，紧贴胚囊的一层胚乳细胞最后形成种子的糊粉层，其余的胚乳细胞最后充满淀粉粒，其特点为：（1）有双球形原胚的现象；（2）反足细胞解体较早；（3）胚乳游离核时期和细胞时期胚乳细胞核的核仁多样。

Abstract:Ultrastructure of nucellar embryo initial and nucellar embryo and nucellar cell as well as ultracytochemical localization of ATPase activity in nucellar embryo of Xanthoxylum bungeanum Maxim were carried out by using transmission electron microscope.T

Abstract:Gynostemma pentaphyllum is a perennial vine.Its root system is composed of adventitious roots.The primary xylem of root is 2~4 arches,and the secondary structure of root is characterized by a thicker phelloderm.Young climbing stem has 5 angles ,and in i

Abstract:It results in living organism with different morphology and different reproductive capacity as the evolution of plant species,and results in diversity of the cell,tissue,organ and plant species.Normal structure pattern and anomalous structure pattern occu

Abstract:应用扫描电镜、石蜡制片及组织化学技术对虎花外蜜腺的形态，结构及发育过程中结构及多糖变化进行了较为系统的研究，结果表明，虎刺花外密腺位于状花序外的总苞顶部5枚随圆形裂端，属于总苞上的密腺，由分泌表皮，产蜜组织和主要由韧皮部筛管组成的维管束构成，虎刺花外蜜腺起源于总苞裂片顶端表面的4－5层原始细胞，根据蜜腺结构特点及多糖变化分析，原蜜汁的贮存及多糖的降解主要在产蜜组织细胞中进行，而分泌表皮细胞则是原蜜汁的加工及蜜汁的合成与分泌的主要场所。