Abstract:In order to find new genes related to salt stress,we constructed a Suaeda salsa aerial part tissue cDNA expression library.Halophyte S.salsa was used as plant material,the first strands of cDNAs were synthesized from mRNA.Ligated the cDNAs into th

Abstract:中国春phlb突变体与5个多倍体Aegilops的杂种F1用普通小麦进行回交，并对回交一代（BC1F1）的细胞学进行了研究。结果表明，BC1F1植株花粉母细胞最高染色体数56条，最低35条，一般情况下phlb基因可以增加BC1F1植株的染色体数（不是所有组合），但不能增加染色体配对水平。杂种F1回交时有效雌配子最高染色体数在含有phlb基因组合中高于不含phlb基因的组合，但最低不杂色体数目相等，且含有21条染色体雌配子最具有竞争力，同时也证明，回交的成功并不取决于杂种F1通过重建分裂（restitution division)形成的未减数雌配子。

Abstract:利用十二烷基硫酸钠聚丙烯胺凝胶电泳（SDS－PAGE）分析了85个小麦材料的高分子量谷蛋白亚基的构成，其结果表明：（1）目前生产中应用的优质小麦品种，大部分具有1A上的优质亚基1，1B上的14＋15／17＋18或1D上的5＋10，个别品种还同时聚合有1A，1B，1D上的优质亚基；（2）在所分析的28个八倍体小偃麦中，多数材料含有1，2^*和5＋10等优质亚基；（3）在本实验室创造的材料中，来源于中间偃麦草和普通小麦杂交的后代材料中大部分具有14＋15亚基。此外，个别种质材料还含有Payne亚基命名系统中未命名的一些稀有的高分子量谷蛋白亚基。

Abstract:After the maize seedlings in the mode of simulated water stress with PEG were fed with four kinds of compatible solutes,the effect of compatible solutes on SOD activity were measured in maize roots under water stress.The results showed ,the activities of

Abstract:Author studied the effect of soil fertility on the change of protein components content and processing quality in wheat kernel.The results indicate that protein and components content in high fertility soil are notably higher than in low fertility soil.Th

Abstract:Hybrid spring wheat 901 and conventional variety Shaan 229 were used to study the course of leaf senescence and the reasons of leaf senescence delay in hybrid spring wheat 901.The study showed,the chlorophyll content,photosynthetic rate and soluble protei

Abstract:研究了土壤干旱条件下，不同的施钾水平对烟草光合速率，胞间CO2浓度，气孔导度，蒸腾速率，蒸腾效率及生物量的影响。结果表明：在土壤干旱条件下适量施钾可以减少叶肉细胞光合活性的下降，消弱非气孔因素对光合的限制，增强气孔调节能力，提高蒸腾效率，并获得较高的生物量。

Abstract:Through planting test of compact and big ear type maize Shaandan 902,it was founded that keeping feasible planting density and adding canopy sum grains are basic of high yield,setting up reasonable canopy structure and system of dry matter production and

Abstract:Sand culture experiment was conducted in a glasshouse at Northwest Science and Technology University of Agriculture and Forestry using corn ( Zea mays ) and sunflower ( Helianthus annus ) as indicating crops to study the influence of N level on water

Abstract:以山桃、甘肃桃、毛桃、杏、马哈利樱桃为材料 ,分别用普洛马林、GA3 、BA为处理激素 ,研究不同浓度激素对破除核果类种子休眠的效果。结果表明 GA3 0 .5μg· g-1、普洛马林3.0μg· g-1能有效破除桃、杏种子休眠 ,幼苗生长基本良好 ,激素浓度过低 ,破除休眠效果不佳 ,浓度过高虽然能提高种子发芽率 ,但幼苗生长不良。 BA无论对破除种子休眠 ,还是幼苗生长均达不到生产要求。普洛马林 1 .0～ 5.0 μg· g-1均能有效提高层积马哈利樱桃出苗率 ,3.0μg· g-1 对破除马哈利樱桃的休眠效果最好 ;GA3 、BA对破除马哈利樱桃休眠效果不明显。

Abstract:With the increasing of NaCl concentration,the Pn,gs,Tr of Lycium barbarum was decreased respectively after treated.When the concentration of NaCl was less than 0.6%,the Ci of Lycium barbarum leaf was decreased,while Ls increased.The main cause of

Abstract:What the primary effects of hormones closely related to physiological changes of membrane.The ABA increased permeability of cell membrane,and the ZT had less effect on it.The both hormones affects on leakage of the ion inside cell identified with that

Abstract:对毛乌素沙地主要建群植物牛心朴子（Cynanchum komarovii Al.Iljinski)的光合特征进行了动态研究。结果表明，牛心朴子整个生育期间光合作用日变化呈双峰曲线，第一峰出现在上午11：00左右，第二峰出现在下午16：00左右，第一峰值明显高于第二峰值；蒸腾速率日保持恒定且维持较低的水平，但不同时期差别明显；不同叶位光合作用存在明显差别，以上部展开第3叶为最高；牛心朴子气孔对环境条件变化不敏感；叶绿素荧光猝灭日变化分析显示，牛心朴子叶绿体PSⅡ的原初光化学效率（Fv/Fm)以及通过PSⅡ非环式电子流的量子效率在上午10：00左右较高，中午下降，下午15：00左右又呈回升的现象。

Abstract:The superoxide dismutase (SOD)and peroxidase (POD) activities in the wheat seedling leaves were increased affected by the low concentration of sulfite.With the increasing concentrations of sulfite,the Chlorophyll contents decreased,the free proline and ma

Abstract:The four upland cottons,which were cultivars of Junmian 1,Simian 2,Mianhua 2234 and Zhongmian 12,had been cultured for 5 days in the condition kill bacterium.Then their root,lower plmular axis and cotyledon were inoculated on the culture mediums containin

Abstract:The present paper,through natural infection and inoculation of Leptographium terebrantis associated with Dendroctonus armandi on Pinus armandi trees,conducted anatomical research on the pine cell tissue infected by the symbiotic fungi.The resu

Abstract:There were a large quantity of lipid bodies in pea root nodules,they widely distributed in uninfected cells and infected cells,most of them located cytoplasm,but a small quantity of lipid bodies also located in vacuoles.Sometimes they were alone in cytopl

Abstract:The morphological character of Potentilla anserina clone were studied by the method of investigation in Kobresia humilis meadow and Potentilla fruticosa shrub,respectively.Most parameters of Potentilla anserina clone in Kobresia humilis

Abstract:以分布在沙波头沙漠试验研究站人工固沙植被中的一年生植物小画眉草为例，研究了荒漠一年生植物不同时间尺度上的种群动态与调节机制，试验结果表明：（1）一年生植物小画眉草种群的续存与其种子库中种子的分批萌发对策密切相关；（2）同一个生长季内，制约小画眉草种群数量变化的关键因子随降水条件的不同而变化，即当环境适宜度较小时（干旱胁迫），非生物因子（降水）限制种群数量；当环境适宜度较大时，密度依赖的竞争作用调节种群大小；（3）在较长的生态时间尺度上土壤特性（结皮厚度，养分含量）也是影响小画眉草种群动态的一个重要因素；（4）小画眉草种群的存活曲线属于C型，说明该种是较为典型的r－对策者。

Abstract:By measuring productivity with quadrat sampling method on the circles and inside,outside the circles of Tricholoma mongolicum and Tricholoma gambasum circles,we analysed the differences of the community among them.The results were showed: T.mongo

Abstract:The vessel elements in the secondary xylem of 13 species in 6 genera of Juglandaceae from China were studied comparatively,including the length and tangential diameter of vessel elements,obliqueness of end walls,the type of perforation plates,the shape an

Abstract:The genome DNA of the 11 Aloe accessions was used as templates and amplified with 50 random primers by using RAPD,which was successfully extracted from the leaves of eleven Aloe accessions (including species,some varieties) by using the improved C

Abstract:首次报道了4种国产兰属植物建兰（C.ensifolium(L.)Sw.)。墨兰（C.sinense(Jacksn ex Andr.)Willd.)，珍珠矮（C.nanulum Y.S.Wu et S.C.Chen)，兔耳兰（C.lancifolium Hook)的核型比较研究结果。具体如下：兔耳兰为2n=2x=38=28m 8sm 2st(2SAT),核不对称系数为61．22％，2A型；建兰的核型公式为2n=2x=40=30m 10sm(2SAT)，核不对称系数为59．15％，2B型，墨兰的核型公式为2n=2x=40=28m 10sm 2st，核不对称系数为59．83％，2B型，珍珠矮为2n=2x=40=26m 10sm 4st，核不对称系数为62．24％，2B型。结合兰属植物若干稳定特化的形态学特征，讨论了兰属植物的核型进化。

Abstract:Based on the preliminary survey and analysis,there are 69 species water vascular plants which include 3 species pteridophyte,66 species seed plants and belong to 32 families 48 genera at the Han River basin in Hanzhong,Shaanxi Province.In these plants,41

Abstract:利用水蒸汽蒸馏方法研究了生长于中国西北部不同采收时期百里香花，叶，茎和全草芳香油含量和化学成分的变化，结果表明：不同采收时期对花和叶芳香油含量却很大，而对茎中芳香油含量的影响较小，最佳采收时期在盛花期，此时不仅芳香油含量高，而且油中百里香酚和香酚的含量也高。气－质色谱图上出现了53中化合物，鉴定了其中的41中，占总成分的94．419％，芳香油中以百里香酚，香芹酚，对聚伞花素和松油烯为主，它们的含量在整个生长时期从43．953％，增加47．810％。

Abstract:从祁州漏芦中分离得到4个已知植物蜕皮甾酮，1个地榆皂甙I以及1个新植物蜕皮甾酮。经光谱分析（IR，MS，^1HNMR,^13CNMR,DEPT,^1H,^1H-COSY,HMBC), 推定这个新天然产物为2β,3β，11α，14α，20β，23-hexahydroxy-5-cholest-7-e-6-one. 命名为异漏芦酮。

Abstract:Choice different decoloration methods experiment with difference treated oil,the results are:chemical decoloration has decoloration effect to different treated prickly ash seed oil,but it has not eliminated pigment and other mater that can deepen the oil

Abstract:The micro morphological characteristics of episperm of subgenus Soja were studied by SEM.The results show that the episperm micro morphological characteristics have taxonomic significance at species level.

Abstract:研究了早籼稻品种培矮64S种子胚愈伤组织诱导的再生的条件。调节培养基中的2，4－D，KT及NAA等激素浓度，胚性愈伤组织诱导频率可达到48．5％，愈伤组织学再生频率接近60％。结果表明，合适的激素浓度可显著提高籼稻组织培养的效率。

Abstract:Shoots and axillary buds were induced in vitro from apexes,stem segments and leaves of insect-resistant transgenic Populus euramericana .August is the best inoculated time and new buds grew rapidly.Basic medium is MS medium.The proper initial cultu

Abstract:Plantlets were regenerated from the endangered and rare plant Prunun mongolica Maxim via tissue eulture.The experiment results showed that the Prunus mongolica explants of shoot apex,shoot cutting section and leaf could be dedifferentiated to call

Abstract:The Leontopodium haplophylloides is mainly distributed in the west of China.The essential oil is extracted by steam distillation from its stem,leaf,flower by GS/MS.The yield of the oil was 0.1%.The main compounds:guaiacol,vanillyl formate,diacidbenzen

Abstract:Adventitious buds were regenerated from petiole of pear cv.'Bayuehong'and 'Suisho'.Adventitious buds were formed from calluses.The optimal medium for petiole regeneration was NN69+IBA 0.5 mg/L(Bayuehong) or IAA 0.5 mg/L(Suisho)+TDZ 1.0 mg/L+Sucrose 30 g/L

Abstract:By means of analyzing structure of pear leaf according to the degree of chlorotic leaf and its restoration by correcting the iron chlorosis.The result showed that the iron deficiency reduced the thickness of leaf,mesophyll and palisad tissue.Palisad tissu

Abstract:Great achievements have been made in the technology for plant gene isolation.This paper will review the new developments of strategies and approaches for the plant disease resistance related gene isolation.The common and different aspects among these tec

Abstract:Wounding is common environment stimulation to plant.At present,there are many researches about the defensive responses to wounding in plants.This review summarizes some identified signal molecules which involved in wounding responses,such as:OGAs,systemin

Abstract:This paper presents the concept and contents of unsufficient irrigation,and mainly discussed under unsufficient irrigation crops produce physiological reaction of adaptation in vivo.After unsufficient irrigation and light arid treatment,crops stomatal res

Abstract:种子脱水耐性是种子发育过程中获得的综合特性，是判断种子贮藏持性的一个重要依据。当种子获得脱水耐性时，生理，形态和结构会发生相应的变化，包括糖，蛋白质，脂类和抗氧化系统等保护性物质的合成，各种保护性物质不是单独作用的，而是协同调节种子的脱水耐性。不同的植物种子，其脱水耐性不同，并且随着种子的发育而变化。关于种子脱水耐性的获得，主要有2种观点，一种认为是数量性状，另一种认为是突变性状。种子库收集种子保存时，适时采集和适度脱水才能有效地延长种子的贮藏寿命。

Abstract:Genetic linkage map is a key field in genome research.It also is the basic of gene localization,gene clone,further genome organization and function.In decade years,fast development of molecular biology,molecular marker technique especially,provides the pr

Abstract:The new advance on study of molecular markers and gene cloning and transgenes of drought resistance and water saving of main crops such as wheat,barley,maize,rice,soybean,was introduced in this paper.

Abstract:A comprehensive evaluation different type vegetation for soil fertility properties were summarized.Include of soil water,soil nutrition,soil pH value etc.Soil water and nutrition is main factor of vegetation products.Roots distribution and litter roots ci

Abstract:Using histochemistry,thin section,ultra thin section and fluorescence microscopy methods to investigate the location of anthraquinones in four species of Aloe leaves.The results of colour reaction,special crystal deposition sites,the regular changin

Abstract:Ultrastructural changes in the process of the microspore and anther development of Pingxiang Dominant Genic Male Sterile Rice(PxDGMSR) were studied by the electron microscope in the thesis.The main reasons of pollen abortion of sterile plants are (1) Tap