In this paper, ASPV from Pyrus pyrifolia cultivated in China was tested by molecular techniques and isolated by mechnically inoculated onto herbaceous plants. The leaf explants of Nicotiana occidentalis were transformed with Agrobecterium tumefaciens EHA105 containing the recombinant plasmid of cp gene from ASPV.
本研究采用生物学和分子生物学方法，对我国砂梨上发生的ASPV进行了分离鉴定；构建了ASPV cp基因的植物表达载体，利用根癌农杆菌EHA105介导的叶盘法进行了转化烟草研究，在国内首次得到了转化ASPV cp基因的西方烟植株，为进一步利用此策略进行抗病毒育种研究奠定了技术基础。
The effects of automobile exhaust on chlorophyll fluorescence parameters of 4 tree species, Acer mono Malus bacata Pyrus ussuriensis and Acer ginnala were tested by means of fumigation in open top chamber.
采用开顶式熏气室研究了汽车尾气对五角槭、山荆子、山梨和茶条槭 4树种叶绿素荧光参数的影响。
The results showed that CR of deciduous fruit crops, estimated by.2C chilling model, 0~ 7.2C chilling model and Utah model, was difference between each other, while it was estimated by Utah model was less difference between different years. In one words, values of CR measured of Pyrus pyrifolia and its hybrids were 340h~530h(0-7.2C chillingmodel), 340c. u~500 c. u and 530h~830h (7.2C chilling model), And those of apricot and nectarine varieties were 520h~900h(0~7.2C chillingmodel), 590c. u~900 c. u and 840h~1300h (7.2C chilling model), and those of grape varieties were 770h~980h (0~7.2C chilling model), 820c. u~1000 c. u and 1200h~1350h (.2C chilling model).
结果表明：应用三种模型统计的落叶果树需冷量数值存在差异，但以犹他模型统计的落叶果树需冷量年际间差异较小；总体来看，砂梨和砂杂梨品种的需冷量为340h～530h(0～7.2℃模型)、340c.u～5 00c.u和530h～830h；桃、杏为520h～900h(0～7.2℃模型)、590c.u～900c.u和840h～1300h；葡萄为770h～980h(0～7.2℃模型)、820c.u～1000c.u和1200h～1350h。
In order to further study the mechanisms of the formation of pear fruit skin color and quality, russet and green fruit cultivars (Yugoan and Cuiguan, both belonging to Pyrus pyrifolia Nakai) were used to regularly investigate the dynamics of fruit vertical and horizontal diameter, pigments content in peel and pulp, titratable acidity, soluble solids content, and sugar contents during fruit development.
为进一步明确不同皮色梨品种果实色素、内在品质成分的变化特性，以褐皮梨新品系玉冠与绿皮梨品种翠冠为试材，测定了果实发育进程中纵横径、果皮与果肉色素含量的动态变化，以及在成熟至采收期间，可滴定酸、可溶性固形物、糖含量的变化特性。
This research was carried out to test vertical vibration levels of the front and rear floor in a truck with leaf-spring suspensions for their effects on mechanical damage to Huanhua pears Pyrus pyrifolia Nakai, cv.
检测了不同路况下，钢片弹簧悬架的卡车运输黄花梨过程中车厢前后垂直振动，并且比较了卡车车厢内不同装载位置梨的损伤情况。
The results of studying the effects of several plant growth regulating substances on pollen germination and tube growth in pear (Pyrus serotina Rhed.) by cultivating pollens in liquid media showed that GA3, TRIA, IAA and 2, 4D stimulated pollen germination and tube growth when pollen was cultivated in their lower concentration media.
采用花粉液体培养法研究了植物生长调节物质对梨花粉萌发和花粉管生长的影响，结果表明：较低浓度的赤霉素、三十烷醇、吲哚乙酸及2，4-D均能促进花粉萌发和花粉管生长，而超过一定浓度时却起抑制作用，最适宜于花粉萌发和花粉管生长的赤霉素浓度为50～300mg/L，三十烷醇为3～100mg/L，吲哚乙酸为5～25mg/L，2，4-D为5～10mg/L。
S. 意群训练:While the new doctrine seems almost certainly correct, the one pa pyrus fragment raises the specter that another may be unearthed, showing, fo r instance, that it was a posthumous production of the Danaid tetralogy wh ich bested Sophocles, and throwing the date once more into utter confusio n.
3+ 一个社会所创造出来藉以使其自身生生不息、恒久不衰的方法得以形成产生，以保存在这个社会看来具有本质意义的文化遗产的各个方面。
How well do I remember her parlour half filled with the organ which her husband had built, and scented with a withered apple or two from the pyrus japonica that grew outside the house; the picture of the prize ox over the chimney-piece, which Mr Pontifex himself had painted; the transparency of the man coming to show light to a coach upon a snowy night, also by Mr Pontifex; the little old man and little old woman who told the weather; the china shepherd and shepherdess; the jars of feathery flowering grasses with a peacock's feather or two among them to set them off, and the china bowls full of dead rose leaves dried with bay salt.
我记得很清楚，她的一半被她丈夫制作的风琴占据着的客厅飘散着来自于长在房子外面的山茶树的烂苹果的味道。壁橱上面一幅获奖的牛的画像是Pontifex先生的作品；在一个雪夜一个男人举灯给一辆马车照明的幻灯，也是Pontifex先生的作品；一个小个子的老年男人和一个小个子的老年女人在谈论天气；中国的牧羊少年和牧羊少女；用一、两根孔雀羽毛点缀得花草坛子；装满凋零的用海盐干燥的玫瑰叶子中国碗。所有的东西都消失了，成为记忆。
ObjectiveTo investigate the antitumor effect of the hot water extract water from Pyrus betulaefolia Bge..
目的探讨杜梨果实热水提取物对H22小鼠的抗肿瘤作用。
Moreover, 1-MCP treatment could reduce rotting rate, maintained the quality of pyrus communis L.
因此，1-MCP处理可抑制西洋梨货架期的后熟衰老进程，有利于保持果实品质，提高贮藏效果。
An optimal random amplified polymorphic DNA reaction system was established to analyse the relationships among Zhongbao pear and other pear cultivars. The cluster analysis results were as follows: Pyrus communis L.
通过建立梨RAPD反应的优化体系对棕包梨和其他梨品种进行聚类分析，探讨了它们之间的亲缘关系。
TDZ is more effective than BA for inducing shoots regeneration from Duckpear, and BA is more effective than TDZ for inducing shoots regeneration from Pyrus communis L.
TDZ比BA更有利於鸭梨叶片的高频不定梢再生，而BA更有利於西洋梨和砂梨叶片的不定梢再生。
The results showed that 1-MCP treatment could defer the change of fruit mature and colour, reduce the production of ethylene and respiration and postpone the peak value. The ethylene production and respiration of Pyrus communis L. treated with 1-MCP were 69.6% and 79.8% of the contrast respectively, the peak of ethylene and respiration were delayed for six days. 1-MCP treatment retarded the increase of soluble solids and malondialdehyde content. The activity of peroxidase, superoxide dismutase and catalase were increased 144.7%, 113.5% and 141.4% of the contrast, respectively.
结果表明，在20℃贮藏条件下，1-MCP处理能明显延缓果实硬度的下降和色度的改变；抑制果实乙烯的合成，降低果实的呼吸速率，推迟乙烯、呼吸峰出现，并降低峰值。1-MCP处理与对照相比，乙烯释放高峰和呼吸高峰推迟6 d出现，同时降低了峰值，乙烯释放高峰和呼吸高峰分别仅为对照的69.6%和79.8%；1-MCP处理抑制了可溶性固形物含量和丙二醛含量的快速上升；在贮藏12 d时，果实的过氧化物酶、超氧化物歧化酶、过氧化氢酶活性分别为对照的 144.7%、113.5%、141.4%；另外，1-MCP还可以抑制果实的腐烂，降低果实腐烂率。
No. 2, p. 161 - 173. Carbonaro et al M (2003) Modulation of Antioxidant Compounds in Organic vs Conventional Fruit (Peach, Prunus persica L., and Pear, Pyrus communis L.).
有机水果对比普通食品的抗氧化剂成分的调节。
The levels of sugars and organic acids in Wujiuxiang pear (Pyrus communis L. cv. Wujiuxiang) fruit were investigated using high-performance liquid chromatography. Volatile compounds from stored Wujiuxiang pear were isolated by solid-phase microextraction and analyzed by high-resolution gas chromatography and gas chromatography/mass spectrometry.
利用高效液相色谱法测定贮藏期间五九香梨的糖和有机酸的组成及变化，采用固相微萃取方式进行萃取，并结合气相色谱和质谱分析检测梨果实中的挥发性香气成分。
Sequence analysis indicated that nucleotide identities of Uenishiwase with Pyrus communis was 79%, and amino acid identities were 81%.
以基因组DNA为模板，经PCR扩增，克隆到一个549 bp的ETR5的DNA片段。
Adventitious bud regeneration from in vitro leaves of Pyrus ussuriensis cv. Manyuanxiang;
离体叶片不定芽再生的影响。
The basic physiological index of redox system of plasmic membrane were studied on two variety of pear, Pyrus ussuriensis Var.
对苹果梨和杜梨两种梨树叶片的质膜氧化还原系统进行了研究。
The physiological and biochemical responses of pear Pyrus ussuriensis Max.
采用盆栽法系统地研究了梨Pyrus ussuriensis Max。
China is the birthplace of one of the pear genus Center, the Asian pear is a pear mostly from eastern Asia, Japan and North Korea are also Asian pears original origin; the domestic cultivation of the bai pear, sand pear, Pyrus ussuriensis Maxim are originating in China.
我国是梨属植物中心发源地之一，亚洲梨属的梨大都源于亚洲东部，日本和朝鲜也是亚洲梨的原始产地；国内栽培的白梨、砂梨、秋子梨都原产我国。