绞股蓝枝种群数量动态的初步研究

在构件理论的基础上,通过动态生命表和有关分析,初步探讨不同生境条件下攀援植物绞股蓝当年生枝种群的数量动态．结果表明：不同生境下,相同致死因素对种群个体死亡的贡献率各不相同;在不同的发育阶段,影响枝种群数量动态的主导因素不尽相同;优越生境中,种群的存活率较高,死亡率较低,亏损个体较少,反之亦然;恶劣生境中,枝种群通过提高出生率而增强种群的适合度,维持种群的延续．     

关于单手肩上投篮举球动作方法的研究

对单手肩上投篮的举球动作方法进行了研究，为今后的教学与训练，尤其是对初学者，尽快地掌握正确的单手肩上投篮技术，提供了理论依据。     

栀子花试管快速繁殖的研究

栀子花具芽茎段在适宜浓度的ＢＡ，Ｋｔ与ＮＡＡ的ＭＳ培养基中，可获得增殖芽丛。切割芽丛继代培养进行苗的增殖。ＮＡＡ利于出根，ＩＢＡ有助于根的伸长。２０ｄ试管苗生根率达１００％，小苗移栽成活率达８５％－９０％。     

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.