麝香石竹试管玻璃苗转化为正常苗（简报）

麝香石竹试管玻璃苗转化为正常苗（简报）赵学良，张友忠，阎王基，孙丹丽（廊坊师范专科学校生物系，１０２８４９，廊坊，第一作者３４岁，男，讲师）关键词麝香石竹，玻璃苗，转化分类号Ｓ６８１．０４植物组织培养中常出现一种畸形苗，其茎叶呈透明的水渍状，不能正常...     

文山红柱兰快速繁殖技术的研究

文山红柱兰授粉后180天的种子具有较高的萌发率,且1/3MS培养基显著优于其他基本培养基;基本培养基中添加10%的椰乳有利于种子的萌发;茎尖在MS NAA0.3 BA3.0(单位:mg/L,下同) 椰乳10%的培养基上诱导产生原球茎的几率最高;原球茎在MS NAA0.1 BA0.5的培养基上增殖,同时部分分化成芽;幼芽在附加5%香蕉汁和5%马铃薯汁的1/2 MS培养基上诱导出根而再生完整小植株。     

Tobacco curly shoot virus isolated in Yunnan is a distinct species of Begomovirus

Virus isolate Y1 was obtained from tobacco showing curly shoot symptoms in Baoshan, Yunnan Province. Whitefly transmission test and virion morphology observation showed that it is a begomovirus. In reactions with 14 monoclonal antibodies raised against begomoviruses, Y1 was readily differentiated from begomoviruses reported in China, Pakistan and India. The complete nucleotide sequence of DNA-A was determined, it contains 2746 nucleotides, with two ORFs in virion-sense DNA and four ORFs in complementary-sense DNA. Comparisons with total DNA-A, intergenic region and deduced amino acid sequences of individual ORFs showed that Yl is a distinct Begomovirus species, for which the name Tobacco curly shoot virus (TCSV) is proposed. The total DNA-A of TCSV is most closely related to that of Tomato leaf curl virus from India (85% sequence identity). In contrast, the deduced coat protein of TCSV is most like that of Cotton leaf curl virus 72b isolate from Pakistan (98% amino acid sequence identity).     

银中杨茎的组织培养及快速无性繁殖

以银中杨幼茎为材料，经表面消毒后，接种于培养基上，5周左右形成丛芽，3周后转至生根培养基上，又经2周长出完整根系，形成再生植株。     

冬小麦H_1代试管苗移栽田间成活率和籽粒产量高的原因分析

11月中下旬将冬小麦花粉试管苗栽入田间,然后覆盖塑料薄膜至翌年2月底揭塑料薄膜,气温保持在10～0～13℃,土壤水分保持在占田间持水量的60％～70％,2月底揭塑料薄膜后调查移栽成活率达98.18％。经对618株自然加倍植株的考种,单株平均成穗10.9个,结实358.6粒。     

Analysis method on shoot precision of weapon in small-sample case

Because of limits of cost, in general, the test data of weapons are shortness. It is always an important topic that to gain scientific results of weapon performance analyses in small-sample case. Based on the analysis of distribution function characteristics and grey mathematics, a weighting grey method in small-sample case is presented. According to the analysis of test data of a weapon, it is proved that the method is a good method to deal with data in the small-sample case and has a high value in the analysis of weapon performance.     

铅胁迫对绿豆苗期生理生化特性的影响及硒缓解作用

在植物生长过程中微量元素硒具有抗氧化作用,重金属铅有毒害作用.探讨绿豆发芽生长过程中硒对铅毒害的缓冲作用,研究结果表明,铅毒害导致绿豆苗期叶绿素含量下降,过氧化氢酶活性下降,细胞膜透性增加,绿豆苗期生长过程中添加硒和铅后,其三种生理生化指标变化有一定缓解作用.     

当归营养苗端的解剖学观察

对当归顶芽的解剖学观察表明,4月中旬至5月上旬的顶芽尚处于营养生长阶段,采取降低抽苔率的措施应在5月中旬到6月初。幼苗移栽时分别施以氮肥和磷肥,生长到5月10日,就其顶芽结构来说,二者与对照无明显区别。     

四季桔花叶变异无性系植株选育初报

本试验以四季桔花叶芽变枝条为选种材料,进行四季桔花叶新品种选育试验研究,已取得关键性的阶段成果,选育出遗传性稳定的四季桔花叶变异无性系植株。     

对世界高水平女足射门前战术手段运用的研究与分析

采用文献资料法、录像观测法以及数理统计等方法,以世界杯与奥运会决赛阶段的女足比赛作为研究对象,对世界高水平女足射门前的战术运用作了研究,希望能为中国女足以后的训练和比赛提供科学的依据.