Abstract:A large number of scientists have made a lot of carefully and thoroughly studying works and obtained many important results for widening absorbing ability of soil water,regulating suitability of roots to water stress,exploiting productive potential of dry

Abstract:The feature,activity,application,biochemical characteristic of antifreeze proteins,and their expression in bacteria,their role in plant antifreeze physiology and their genetic engineering are systematically reviewed from the view of application.The presen

Abstract:在生长房5种(暗处、可见光、低、中、高强度紫外线-B)处理下，研究了8个大豆品种的种子萌发率和萌发后幼苗的生长状况。结果表明，暗处种子萌发率高于自然光和UV-B辐射的种子。UV-B辐射增强对大豆种子的萌发率没有显著影响，仅使部分品种的最大萌发率降低和导致部分品种达到最大萌发率的时间延长。幼苗的生长对增强的UV-B辐射非常敏感。使大部分品种的胚根变短增粗，这可能是植物激素作用的结果。大豆的叶绿素a、叶绿素b和总叶绿素含量明显受到UV-B辐射的抑制。UV-B作用能促进类黄酮在幼苗中的积累，紫外吸收色素的增设有利于提高对UV-B的抵抗力。UV-B辐射的这种效应及大豆品种间的差异在自然情况下会产生深远的生物学和生态学意义

Abstract:小麦幼苗经－０．５ＭＰa聚乙二醇（ＰＥＧ－６０００）溶液暗中渗透迫０、６、１２、１８、２４、３０、３６、４２、４８h，叶片的总呼吸速率（Ｖt)呈现先上升后降低的趋势，交替途径呼吸也表现出相同的变化模式。水分胁迫初期（０－１２h)，交替途径容量（Ｖalt)、实际运行活性（ρValt)及运行系数（ρ值）均上升，此后（１８－４８h）逐渐下降，水分胁迫也影响了呼吸电子流在２条呼吸途径中的分配比例，胁迫初期的０－１２h内，流经交替途径的电子流增多，而流向细胞色素主路的电子流减少，但随着胁迫时间的延长，交替途径的贡献降低，而细胞色素主路的贡献增加，说明小麦叶片的抗氰呼吸在水分胁迫初期被诱导增加，而随着胁迫进行的延长又表现为下降。

Abstract:Transformed calli of Linum usitatissimun,Onobrychis viciaefolia Scop.and Alhagi pseudalhagi were previously obtained by A.tumefacicens mediated transformation transferring chitinase RC24 gene into the three plants.The screening patterns of peroxidase isoz

Abstract:杂交小麦“９０１”在不同发育时期及不同叶位，叶片色素蛋白复合体含量均高于对照品种陕２２９，尤其表现在“９０１”的旗叶，而陕２２９的倒二叶在籽粒形成后期、灌浆期，略高于“９０１”，倒三叶在籽粒发育后期至成熟期“９０１”的含量要高于陕２２９。叶绿素蛋白复合体分析结果说明，在不同发育时期、不同叶位，“９０１”叶片色素蛋白复合体中含有较高的叶绿素b，尤其表现在籽粒形成后期的旗叶上。２个品种在不同发育时期，不同时叶位之间，色素蛋白复合体组分上没有差异。仅表现在成熟期，陕２２９的倒三叶各色素带含量减少，并且消失１条叶绿素蛋白复合体带，初步认为此带是ＬＨＣＰ的寡聚体之一，而“９０１”比陕２２９晚７d倒二叶上表现出样的现象，表明“９０１”叶片色素蛋白复合体抗衰老能力很强。

Abstract:It was investigated that mechanism of hydration-dehydration treatment to reduce electrolyte leakage of tomato seeds.The results showed that effect of hydration-dehydration treatment to reduce electrolyte leakage created in the hydration stage.When the hyd

Abstract:Using pot experiment with or without N fertilizer supply,the effects of water limited dificit stress during different stages on leaf protective enzymes were studied.The results showed that without N fertilizer supply,water dificit stress lowered the activ

Abstract:Effects of P application on root acid phosphates (R APase) of wheat soybean and wheat corn in intercropping,were studied with pot method,the results showed that:Root APase activity was enhanced by intercropping,it was raised on an average 35.9% in

Abstract:In present study,we in investigated 1 what role does the cotyledons play in the growing and developing of phosphorus deficient white lupin?2 the effect of phosphorus in the cotyledons on the accumulation and exudation of organic acids in/from root tips an

Abstract:This paper deals with the mechanism of increasing yield of spring wheat by using plastic mulching technologies.The results of plastic mulching (M) on physiological and biochemical properties were as follows:M enhanced the earth moisture,maintained higher

Abstract:Effect of irrigation on photosynthesis decline of winter wheat flag leaf during senescence was studied with field plot experiment.The results indicated that,the main reason of the decrease of photosynthetic rate at the initial stage of senescence was due

Abstract:Effects of seed dressing in 3 plant nutrient on the senescence of roots after anthesis and yield had been studied in dry land wheat of high yield.The treatment of using seed dressing in plant nutrient,the roots system vigor,the activity of superoxide dism

Abstract:研究采用酶联免疫分析法（ＥＬＩＳＡ）提取和测定红锥和苦槠发育过程中果实内ＡＢＡ含量，并用不同浓度ＡＢＡ喂养，测定果实不同发育期对外源ＡＢＡ的敏感性。用放射性同位素法测定ＡＢＡ对贮藏蛋白质的积累作用，结果表明：随着红锥和苦槠种子发育过程内源ＡＢＡ含量逐渐上升，达到高峰的时间分别为１１月５日和１０月５日，随后ＡＢＡ含量均逐渐下降。成熟采收时果实内ＡＢＡ含量比高时峰小８－９倍，随着果实的发育种子对外加ＡＢＡ的敏感性逐渐变小，外源ＡＢＡ浓度１０^-4mol/L可以完全抑制１１月２５日（红锥)笔１０月１５日（苦槠）前种子发芽，但对成熟的种子１０^-2mol/L ＡＢＡ亦不能抑制发芽。ＡＢＡ对成熟前期胚贮藏蛋白质合成无影响，但能促进成熟后中后期胚的贮藏蛋白质的积累作用，ＡＢＡ维持红锥和苦槠贮藏蛋白质全盛和积累作用表现在转录水平上。

Abstract:通过对沙地栽培的苹果梨和锦丰梨２种梨树光合速率(Pn)日变化、季节变化的测度研究表明，苹果梨Ｐn日变化呈单峰曲线，峰值出现在上午９：００为１０．１５８μmol.m^-2.s^-1.。锦丰梨Ｐn变化呈双峰曲线，和一峰值在上午９：００，第二峰值在下午１３：００，第一峰值高于第二峰值Ｐn分别为１４．５６６μmol.m^-2.s^-1.和１０．９７２μmol.m^-2.s^-1.。并分析得出２种梨树Ｐn与其蒸腾速率（ＴＲＡＮ）、胞间ＣＯ２浓度（ＣＩＮＴ）、水平气压缺（ＶＰＤ）等影响因子之间存在着极显著相关关系和回归方程，以及２种梨树的水分利用效率（ＷＵＥ）。

Abstract:８０年代以来，以林草地地力衰退为特征的人工林草地土壤退化日趋严重，其中以土壤水分严重亏缺为特征的土壤干化现象愈益引起了人工的重视。土壤干化的的直接后果是形成土壤干层，导致土壤退化，植物生长速率减缓，群落衰败以至大片死亡，严重地威胁到我国北方地区特别是黄土高原地区生态环境的建设，因此，研究和解决土壤干层问题已成为黄土高原植被建设的迫切任务。根据延安试区的土壤水分和植被生长状况调查资料，初步分析了不同条件下刺槐人工林地的水分状况。结果表明：试区刺槐人工林地普遍形成了土壤干层，且已相当严重；坡向对土壤干层有明显影响，阳坡形成的干层阴坡严重，坡度愈大；土壤干化愈剧烈。林龄对干层严重程度影响不影响，同时，研究指出了解决土壤干层问题的意义。

Abstract:A chloroplast in Ammopiptanthus mongolicus general possesses 1~3 starch granules that are different in morphologic features,there mainly are 4 types.The first type,its electron density is lower,but the outer part is higher than the central part and forms

Abstract:獐牙菜属的红直獐牙菜、抱茎獐牙菜和四数獐牙菜３种植物花蜜腺都属花被蜜腺，其结构相似，均由分泌表皮和产蜜组织组成，为结构蜜腺，是花冠其部薄壁组织恢复分和能力形成的，分泌表皮无气孔器，原蜜汁由蜜腺周围的维管束提供，经产蜜组织加工后，由分泌表皮外薄的角质层泌出。四数獐牙菜花蜜腺裸露，凸起，而另２化蜜腺凹限为囊状、；红直獐牙菜为脱落蜜腺、而抱茎獐牙菜和四数獐牙菜为宿存蜜腺，其花蜜腺的性状基本印证了３种獐牙菜属植物的系统位置。

Abstract:K、L、Sh、T、A型 5类小麦杂种 F1研究表明 :1 K、L、Sh、T4类细胞质对杂种 F1不育的恢复度和单株产量均存在不同程度的不良效应 ;2不育系易恢复性能为 K>L≥ Sh>T型 ;3 K型不育系恢复度高的一个重要原因在于小穗中部小花结实性好 ;4研究 K、L、Sh型恢复度时 ,利用国际法表示恢复度较为合理 ;5F1单株籽粒产量普遍存在优势 ,平均超双亲杂种优势为 8.57% ,具有 1 5%以上的杂种组合占总组合 2 3.33%。单株籽粒产量优势为 A>K>Sh>L>T;6产量构成因素超双亲优势为千粒重 >单株穗数 >单穗粒数 ,其中千粒重优势为 K、L、Sh≥ A>T,单穗粒数优势为 A>K>L>Sh>T,单株穗数优势为 A>L>K>Sh>T;7K、L、Sh比 T型细胞质不育类型具有更大利用潜力。

Abstract:The breeding of the new variety Xinong 8727 provided the reference to the breeding of new wheat variety in yield stability and general adaptability.The experiment was designed in different environment condition and site basing on the 5 lines of high gener

Abstract:超大穗小麦是小麦超高产育种的宝贵资源，通过去穗处理，对不同类型的超大穗小麦灌浆特性进行了方程拟合及参数分析，结果表明：①百粒重的增重进程，在不同处理间无显著差异，不同品系间差异明显；②单株粒重的增重进程，在不同处理间、不同品系间都表现出显著差异，不同处理间更为突出；③对灌浆参数分析，超大穗小麦的最大灌浆速度与对照基本一致，但灌浆期显著的长，８６（３０６）达５０d,90(151)43d，而对照小偃６号、咸农１５１分别为４０d,35d。依次配合相应的栽培技术，可有效的发挥超大穗小麦产量潜力。

Abstract:Calluses were induced form internode segments of sterile seedlings of Astragalus melilotoides Pall on MS medium supplemented with 1-2 mg/L 2,4 D and 0-0.5 mg/L 6BA.The frequency of callus induction was above 95%.When calluses were transferred and culture

Abstract:The somatic embryos were induced from embryonic calli that were induced from cotyledon explants of rare breed of jujuba Linze Chinese date.The embryoids successively differentiated through globular shaped,heart shaped and cotyledon stages,which was sim

Abstract:The Quercus glandulifera var.brevipetiolata forest in Foping National Reserve (FNR) was studied in this paper.The results showed that FNR is a concentrating distribution area of Quercus glandulifera var.brevipetiolata forest in Qinling Mt.,and that in FNR

Abstract:In this paper,the percentages of important value of Tsuga longibracteata and its associated species are regarded as the measure of the competitive parameter,and the dominant degree of normal stands are regarded as their environmental capacity.The fina

Abstract:研究了大吴风草属的核形态，染色体间期为复杂型；前期 色体为中间型，染色体长度从３．７０μm到２．６４μｍ，平均长度为３．２０μｍ；核型公式为２n=60=14m 26sm 20st(4SAT)，为３Ａ类型。过去认为大吴风草属与橐吾属接近，并比之原始，但染色体和花粉特征并不支持这种处理。

Abstract:研究利用新疆、甘肃河西、宁夏沙坡头地区采集的头状沙拐枣（Ｃalligonum caput-medusae)、红皮沙拐枣(C.rubicundum)、白皮沙拐枣（Ｃ.leucocladum)、泡果沙拐枣（Ｃ.junceum)、河西沙拐枣（C.potaninii)和蒙古沙拐枣（C.mongolicum)果实的形态性状指标，应用双因素重复方差分析法，对不同种群间果实的形态变异进行了研究，得出红皮沙拐枣、蒙古沙拐枣、白皮沙拐枣、泡果沙拐枣下不同种群间果实的形态变异差异显著，头状沙拐枣、河西沙拐枣果灾的形态变里差异不显著，用系统聚类分析，对各种群间的相似性进行了研究。

Abstract:对马铃薯、菜豆、萝卜和番茄等４种绿色蔬菜进行营养成分和有害物质的全面测定。结果表明：绿色蔬菜具有高营养、无毒的特点。（１）４种绿色蔬菜的含钙量分别为一般蔬菜同一品种的２４０％、１９８．５％、１６３．７％和１５７．８％，含铁量分别为１７．４倍、８．７倍、１０．７倍和１２．７倍，含磷量分别为１１８．２％、１０２％、１６３．６％和１７７．８％，并具有较高的镁、锌、铜和锰等元素的含量。（２）４种绿色蔬菜的镉、砷、汞、氟、六六六、ＤＤＴ、敌敌畏、乐果、马拉硫磷、对硫磷、甲胺磷、杀螟硫和倍硫磷等１３项有害物质全部符合绿色食品标准。（３）４种绿色蔬菜的ＶＢ１含量分别增加２０％、２２．２％、１６．７％和６％，ＶＢ２分别增加３０％、１２％、１３５％和２６．７，Ｖc分别增加８．６％、６８．９％、１２．１％和１８．１％，胡萝卜素分别为一般同种蔬菜的１６倍、２．９倍、１３．５倍和４．５倍。（４）其蛋白质含量也分别增加１８．５％、１３．９％、７．５％和３０％，灰分分别为２．０８倍、３．１５倍、２．８５倍和２．９６倍，总糖分别为一般同种蔬菜的９１％、１０１．１％、１９１．３％和９５．２％，粗纤维分别为１１３．３％、８９．２％、８６．７％和１０５％。

Abstract:A new method of two dimensional electrophoresis is introduced,and applied to analyze protein subunits.The results show that the new method has been employed to understand the constitution of seed protein subunits in details.

Abstract:The article studied on the practical technology of alkali refining high acidity pricklyash seed oil to deacid on the base of previous research.The result indicated that traditional technology of normal alkali refining can refine the pricklyash seed oil w

Abstract:Helianthemum songaricum and Tetraena mongolica are relic desert species of tertiary and endangered,distribute in West Erdos,Inner Mongolia.In this paper,net photosynthesis,transpiration and some other physical ecology data of these two plants were

Abstract:山丹黄参是伞形科迷果芹属的迷果芹（Sphallerocarpus gracilis)经测定，该植物含有大量人体必需的各种微量元素，其中P,Mg、Ｋ、Ｃu、Ｃr、Ｃo含量比党参（Codonopsis pilosula)和当归（Ａngelica sinensis)还高，Ｚn,Mn的水平也不低，是一种营养丰富的绿色食品，具有广泛的应用与开发前景。