Abstract:梨果实是由下位民衍生，有发达的肉质果壁，是一种假果。不同品种梨果实结构有一；定判别表现在果实表现和果肉细胞及细胞内物质成分的不同。果实角质厝较厚，且后期深入表皮细胞间隙，表皮下４～５层细胞２含有大量易被染色的单宁类物质，定藏，角质膜较薄，表皮下细胞不含单宁类物质，不耐贮藏。不同品种梨果实中石细胞团的大小不同，糖分含含量也存在一定差异。石细胞团的大小与果肉细腻程度及糖分含量呈负相关，是影响果实品质的

Abstract:利用光学显微镜观察了獐牙菜属３５种植物的呈表皮，发现该属植物成熟叶上下表皮细胞形状（表面观）为多边形和不规则型，垂周壁式样为平直、弓形和波纹，多数种类上、下表皮均有气孔器分布，气顺类型主要有３种，无规则型，不等型和平列型。这些特殊２对獐牙菜属下分类有一定的意义。结合其它方面的研究成果，初步确定叶表皮特征可能具有以下演化趋势，垂周壁式样深波方←浅波纹→平直，弓型，气顺类型无规则型→不等型→平列型。

Abstract:棉农４号春小麦幼苗（Ｔｒｉｔｉｃｕｍ ａｅｓｔｉｕｖｕｍ Ｌ．ｅｖ ．Ｍｉａｎｎｏｎｇ Ｎｏ．４）经一０．５ＭＰａ ＰＥＧ溶液渗透胁迫２４、４８和７２ｈ，使叶片分别受到轻蔗、中度和重度的水分胁迫。在渐进水分腔迫条件下，叶绿体类囊体膜中光系统Ⅱ捕光色素蛋白得合物（ＬＣＨ Ⅱ）的各组分含量发生了不同变化。对类囊体纱蛋白复合物进行的温和电泳结果显示，在轻度水分胁迫（２４ｈ）时，明轻度水分胁迫对其有诱导作

Abstract:Effects of different short term shade levels on photosynthetic characteristics and stomatal response in upland cotton ( Gossypium hirsutum L.Zhongmain No.23) leaves were investigated under the well irrigation,water stress,rewatering.Results showed tha

Abstract:The oxidative damage and the responses of enzymatic and non encymatic antioxidants were studied during the drought induced flag leaf senescence in one drought tolerant and one drought sensitive varieties of winter wheat ( Triticum aestivum L.).The

Abstract:骆驼刺苗茎切段有很强的离体培养再生能力，用野生型发根农杆菌Ａ，菌株转化骆驼刺度轩茎段，并建立了发根转化体的培养体系。高压纸电泳显示转化组织可合成冠瘿。试验不同试验经条件及理化因子对提高转化率和加快发根生长的影响。结果表明，经过３天预培养及０．３ｍｏｌ／Ｌ甘露醇１２ｈ高渗处理后培养于ＭＳ培养基中可有效提高转化率。而２％～３％蔗糖，３ｍｇ／Ｌ，ＧＡ３，１０μｍｏｌ／ＬＣｕ＾２＋，１０ｍｇ／ＬＡｇ＾＋，

Abstract:Effects of mannitol and 6 BA on the rice cell redifferentiation,activities of peroxidase and IAA oxidase were investigated.The results revealed that treatment with mannitol retarded cell senescence,enhanced the ability of cells to redifferentiation,and r

Abstract:冬季蓝色无谪膜塑料大棚内有效光合辐射（ＰＡＲ）和紫外Ｂ（ＵＶ－Ｂ）都比棚外低，给大棚番茄补充照射ＵＶ－Ｂ和红光。结果表明，红光可提高番茄果实糖、酸含量。高剂量ＵＶ－Ｂ（０．９５ｋｊ．ｍ＾－１．ｄ＾－１，０．７１ｋｊ．ｍ＾－２．ｄ＾－１）降低番茄红素Ｃ（Ｖｃ）的含量，低剂量ＵＶ０－Ｂ（０．５４ｋｊ．ｍ＾－１．ｄ＾－１，０．６５ｋｊ．ｍ＾－２．ｄ＾－１）可提高番茄红素和Ｖｃ含量。低剂量ｋｊ．ｍ＾－２．

Abstract:建立大田温栅，以不同的人工低温量（冷温小时数分别为６００ｈ、９００ｈ、１２００ｈ）处理滇中砀山酥梨休眠芽和枝，分别将枝条嫁接到温棚中，调查芽的萌动与发育状况，并检测不同的低温量导致芽和枝发生的生理生变化。结果表明，不经冬季低温处理的砀山酥酥梨花芽自然不能解除休眠，６００ｈ低温量基本可解险砀山酥梨花芽休眠，９００ｈ低温量使休眠芽的总萌发率、花芽萌动率均达最高值，１２００ｈ低 一反而使休眠芽的总萌发率

Abstract:试验研究了葡萄贮期脱落酸 ( ABA)的变化 ,结果表明 :葡萄贮期 ABA含量呈抛物线形变化 ,有明显的高峰出现 ,低温 ( 0± 0 .5℃ )贮藏具有推迟 ABA峰期和降低峰值的作用 ,经用 9种植物生长调节剂和 2种化学药品对葡萄果穗处理试验 ,三碘苯甲酸 ( TIBA)对 ABA的形成有极强的抑制作用 ,吲哚 - 3-乙酸 ( IAA)、赤霉素 ( GA3)、萘乙酸 ( NAA)和 6-苄基氨基嘌呤 ( 6- BA)对 ABA的形成也具有拮抗作用 ,矮壮素 ( CCC)、比久 ( B9)、乙烯利 ( CEPA)和外源脱落酸对 ABA的形成有促进作用。

Abstract:用一定浓度的ＳＡ溶液喷布黄瓜幼苗，结果表明，ＳＡ可显著提高黄瓜幼苗的壮苗 数，促进壮苗的形成，ＳＡ的最佳深度为２５０ｍｇ．Ｌ＾－１。同时，当低温胁地，２５０ｍｇ．ｌ＾１－的ＳＡ可显著提高黄瓜幼苗叶片细胞膜的千钧一发生，抑制叶片中ＭＤＡ的累积。

Abstract:The characteristics of water physiological ecology of seabuckthorn and the communities were studied in the semiarid Loess hilly region at Wuqi and Ansai Shannxi in 1977~1998.The following results are obtained:(1) Seabuckthorn has certain drought resistan

Abstract:ＴＷＩＮＳＰＡ将山西关帝山神尾沟８９个群落样方划分为２３组，即２３个群系。ＤＣＡ结果表明，第一轴、第二轴及排序图对角线分别反映各植物群落所在环境的温度、温度和海拔梯度变化。ＤＣＡ二维排序图分布格局表明，活土最度、枯枝落叶层厚度与海拔之间有极明显的正相关性。不同中样地指数散点图表明：群落多样笥和均匀度指数随海同呈下降趋势，丰富度指数基本保护不变。

Abstract:The species composition is one of the important characteristics of the vegetation,so it contributes to deep the knowledge of vegetation to study the flora.The middle and upper reaches of Xunhe River basin locates in the south face of Qinling Mountain.The

Abstract:The reproductive characteristics of Tetraena mongolica Maxim were studied comprehensively.The results were presented as follows: Tetraena mongolica Maxim had two forms of reproductive system:sexual and asexual,the former played a leading role.The s

Abstract:The application of near infrared spectroscopy in the classification of Ferulineae was studied.14 species of 8 genera in Ferulineae Drude were investigated by NIR.Their NIR data was clustered according to single linkage by using angle tangent of NIR spect

Abstract:Elevated atmospheric CO 2 concentration can stimulate the growth of plants,especially C 3 plants.Plant photosynthesis could be stimulated under the short term CO\-2 enrichment,but decreased and accompanied by the photosynthetic acclimation when exposed

Abstract:Leghemoglobin occurs at high concentration in the nitrogen fixing root nodules of legumes.In this paper,the preparation,determination,biological function,elementary characteristics and biosynthesis mechanism of leghemoglobin are reviewed in a relatively

Abstract:试验选用孤雌生殖单倍体地率存在差异的不同类型自交系为材料，利用ＤＡＰＩ荧光染色方法对离体萌发花粉管中两个精核之间的距离进行观察统计。结果显示，具有２个精核、１个精核和无精核花粉管的百分率与单倍体诱导率均不存在相关关系。在具有２个糖核的花粉管中，根据不同精核间距分布组之间的相互关系推测，存在着２个相互独立的花粉管亚群，即精核间距小于花粉管平均直径的疏亚群。其中，密管亚，即精核间距小于花粉管平均直径的

Abstract:In the experiment using wheat cultivars,plant tiller,leaf numbers and biomass were found to be in a significantly positive correlation to the total absorbing area and active absorbing area of their root systems as treated at a lower level of phosphorus,as

Abstract:Through repollination and treat of GA 3,intergeneric hybrids of T.aestivum with Ae.vavilovii RM0286 and Ae.vavilovii RM0291 were respectively produced.The seed setting percentage of two cross combinations were 39.84% and 41.22% respectively,w

Abstract:The immature embryos must be rescued in order to get the hybrids between T.aestivum and Ae.tauschii ,and the ratio of seedlings established by rescuing embryos with 12~16 days after polination was high.Different cross methods affected the ratios of

Abstract:以枸杞胚性愈伤组织为材料 ,选用含 NPT- (新霉素磷酸转移酶 )基因的 PBI1 2 1质粒 ,运用剂量为 2 .2× 1 0 9n/s的快中子束 ,首次研究了快中子束在植物转基因方面的应用 ,并得到了抗卡那霉素的小苗 ,初步确证外源基因已导入植物细胞

Abstract:采用透镜电镜技术对小麦（Ｔｒｉｔｉｃｕｍ ａｅｓｔｉｖｕｍ）小孢子发生过程进行了超微结构观察。造孢细胞时期细胞质中含有丰富的核糖体，质体和线粒体。在小孢子母细胞减数分裂过程中，有核糖体数量存在逐渐减少的现象，质体和线袜体结构在双线期／终变期和中期１简化，二分体时期，质体和线粒体形态结构基本恢复正常。结果表明，啵麦小孢子母细胞减数分裂过程中存在质体和线粒体的脱人化与再分化过程，但该过程与核糖体数量增

Abstract:The origin and development of the nucellar embryo and endosperm in Xanthoxylum bungeanum Maxim,which is unisexual and dioecious and only appears as female plant in Beijing,were studied with cytological and histochemical methods.Before nucellar embryog

Abstract:There are abundant mitochondria in mesophyll cells of \%Ammopiptanthus mongolicus\% in winter.They often locate near buding and dividing places of chloroplasts and cell walls with a large quantity of tubular structure formed by cytoplasmic membrane endocy