Abstract:Hairy root cultures, which were induced from the leaf-disc explants of Artemisia annua L.,were cultured on MS medium with 30 g/L sucrose in shake flasks.During the growth cycle,the time course of fresh and dry weight increase, artemisinin production on a

Abstract:On the basis of our investigations and published flavonoids chemical information and combined to morphological,anatomical and embryological data,studies and their distribution were discussed with respect to their chemosystematic significance for Zygoph

Abstract:采用水培的方法研究了Al对小麦（Triticum aestivum L.cv Yangmai No.5）幼苗的生长、根尖组织膜脂过氧化作用、保护酶的活性和质膜结合酶H

Abstract:This report studies effect of Lanthanum on physiological and biochemical bases of seed vigor of rice. The results of experiments showed that Lanthanum nitrate accelerated germination and increased seed vigor of rice. With 20mg/L Lanthanum nitrate treatmen

Abstract:Photosynthesis rate (Pn) and transpiration efficieney (WUE) change on maize plant was studied in alternate drying-wetting,The result showed that controlled 1/2 root divided alternate irrigation and 1/2 root-divided fix irrigation can decrease water con

Abstract:采用ＰＥ袋方法于常温一藏秦猕猴桃，贮藏期间袋内ＣＯ２浓度高于６％时果实会产生伤害贮藏前期，果实的果肉和果心硬度均很高，这与两部位淀粉酶和多聚半乳糖醛酸酶活性严重被抑制淀粉和果胶物质水解被抑制有关。贮藏中期，果肉出现水浸状，到贮藏末期，果心和照相机人均很快腐烂，这主要与Ｖｃ含量明显降低，导致膜脂过氧化加剧有关。而与ＳＯＤ活性变化关系不大。而贮藏期间，果心硬度明显高于果肉，这与果心淀粉酶和多聚半乳醛酸

Abstract:生物试验研究表明，５０μｇ／ｇ的维生素Ｂ１、Ｂ２和Ｂ６混合液及２０μｇ／ｇ鸟囊素、阿魏酸、香草酸、水杨酸和苯甲酸单独或混合浸种可促进小麦早分蘖、多分蘖，提高小麦成穗率和产量，扬花期叶面喷施，可提高旗叶的过氧化物酶活性，降低丙二醛的积累，延缓叶片衰老，提高光合效率。

Abstract:The sexual organ dovelopment and fruiting characteristics of fifty-one apricot (Armeniaca vulgaris Lam.) varieties were investigated and analysed systematically.The results showed that1.The pollen size and shape of varieties of apricot were similar com

Abstract:６～７月取香棒当年生半木质化、具腋芽的茎段为外植体，诱导腋芽萌发，进行繁殖培养。通过大量试验，筛选出各阶段适宜的培养基组成。萌芽诱导阶段培养在ＭＳ＋６－ＢＡ０．２ｍｇ／Ｌ中，腋芽萌发早，生长快；在继代和增殖培养中以ＭＳ＋６－ＢＡ０．２ｍｇ／Ｌ效果较好，ＭＳ＋ＺＴ０．２ｍｇ／Ｌ＋ＧＡ３２．０ｍｇ／Ｌ次之。培养３０天繁殖倍数３．１～４．０，在仅含ＭＳ有机元素。铁盐减半、蔗糖１５ｇ／Ｌ的固体培养基中，附

Abstract:利用中国春小麦的１Ｂ°ＩＤ＾Ⅳ缺四体分别与具有粘果山羊草、易变山羊草和偏凸山 草细胞质的１Ｂ／１Ｒ易位型小麦雄性不育系７７（２）和８２２２杂交，同时采用Ｃ－分带技术对其Ｆ、体细胞中的１Ｂ／１Ｒ易位染色体进行鉴定分析，认为７７（２）和８２２２中的１Ｂ／１Ｒ易位染体仅是由１Ｂ的长臂及其着丝点和１Ｒ的短臂组成，不包括１ＲＳ上的随体。由于随体的丢失造成１Ｂ／１Ｒ染色体中的１ＲＳ顶端缺失，其断黎明位点不同材

Abstract:利用VE型不育系及其蓝粒标记的同型保持系为材料，采用细胞学鉴定方法对其减数分裂中期的染色体结构进行了观察分析，在花粉母细胞MI的主要染色体结构为2n=21”（包括浅蓝粒种子植株和白粒种子植株），方差分析结果表明染色体结构上存在极显著差异，认为利用蓝位标记的VE型不育保持系为4E染色体的蓝粒基因片段转移而形成的易位系。田间育性调查表明利用这个保持系生产的不育系的不育性是可靠的．同时，由于蓝粒基因片段的易位仍然能够恢复该不育系的育性，证明了4E染色体的育性恢复基因和蓝色胚乳基因位于同一染色体臂上．对保持系和不育系分别与普通小麦和蓝二体附加系的杂种F1减数分裂的细胞学观察表明，VE型不育、保持系确有促进部分同源染色体配对作用，但在这两个组合中多价体的细胞频率较低．

Abstract:Wheat (Triticum aestivum L.) hapliod callus Leymus chinensis (Trin.) Tzvel callus was not capable of differentiating to whole plants and was used to prepare protoplasts.The L.chinensis protoplast were irradiated by ultra violet rays and fused with whea

Abstract:An experiment of removing spikelets in different locations was conducted on winter wheat at crop varieties exhibition center in Henan province in 1997-1998.WM 6 was chosen as research material.The result indicated that the effect of removing spikelet i

Abstract:Corn hybrid Shaanzi No. 1, breeded by Corn Institute of Shaanxi, was registered in 1998 Stability analysis was conducted based on the data from two year's summery corn regional test of North China. Analysis agred with the results of distrct test and farm

Abstract:莼菜（Ｂｒａｓｅｎｉａ ｓｃｈｒｅｂｅｒｉ Ｇｍｅｌ）的绒毡层属腺质绒毡层。四分体时期是绒毡层细胞发育的高峰期，大量膨胀的内质网互相连接，在切面网格构布满细胞，用三维空间结构分析，内质网从多的小室，每个小室中充满核糖体。四分体发育后期，内质网小室中的核糖体开始解体，形成高电子密度的球形体，内质网消失后，从金钱求证菜体游离于细胞基质中。花粉单核期，球形体通过质膜进入花粉囊。在花粉外壁形成 ，球形体不

Abstract:通过植物形态解剖学方法研究４种药用芦蔡的叶的结构，结果表明：它们都具有早生多浆植物中的结构特征。表皮及角质层厚，气孔下陷，气孔下陷，孔下室大。叶肉分为二部分，由同化薄壁组织和储水组织组成。同化薄组织由多层细胞组成，细胞形态相似，不分化为栅栏组织和海绵组织。储水组织占据叶的体积一半以上，细胞大、不规则、壁薄、富含粘液。维管束具鞘，呈环状分布。紧靠同化组织的维管束赶忙皮薄壁组织发达，具有合成和储存芦荟

Abstract:Vascular bundle equal distributed in circumfuse of two cotyledons, formed a circule. Sieve elements are division from two mother cell of vascular bundle. Vascular bundle have not cambium layer, vessel,and spiral tracheid as well. Only sieve element.Develo

Abstract:基于分支系统学的原理和方法。对禾本科以礼草属进行了系统发育分析，以礼草属是个单系在群，它的３２个外部性状选作极性分析。鹅观草属中的肃草作为外类群，采用ＰＡＵＰ程序对矩阵进行运算，获得了１个最简约的谱系分支图。在分支图上，以民礼草属２６个种可以归为３个组，但不适合于划分系，３个组中各组包含的种数分别与传统分类的３个组基本吻合，从而支持了传统分类的结果。同时，分支图还展示了各个类群间的亲缘演化关系，其

Abstract:分析了小檗科鬼臼亚科４个属代表植物桃儿七、川八角莲、南方山荷地以足叶草种子大小及共变异式样并对该变异式样的生物学意义予以分析。结果显示：（１）在４种植物干种子中，以川八角莲最重，为３７．２４±６．７１ｍｇ，桃儿七镒之，为３６．５６±４．５４ｍｇ，足叶草最轻，为１９．０１±３．２１ｍｇ，南方山荷叶较轻足叶草稍重，为２３．２２±３．２６ｍｇ；（２）每种植物均存在一定比例的活力低下种子，其中以桃儿七最低

Abstract:The chromosome numbers of mitosis metaphase of stem apex or growing point of 6 bryophytes species in Sichuan Dujiangyan Longchi area are reported. 1. Radulla chinensis Steph. var. rotundistipa n=8; 2. Conocephalum conicum (L.) Dum. n=9; 3. Plagiomnium dru

Abstract:The research of recent years shows that phloem loading and unloading of plant photoassimilate both have symplasmic and apoplasmic pathways.Sugars transported by loading mainly are(1) raffinose and its analogue (in symplasmic pathway),(2) sucrose (in ap

Abstract:It was summarized that the history, types,universality,amount, location, physiological mechanism of hydraulic lift in this paper.The significances of hydraulic lift in plant physiology,ecology,nutriology,crop cultivation,and other subjects have been discu