中国李离体繁殖的研究

对影响中国李离体繁殖的有关因素进行了研究．结果表明,中国李增殖和生长适宜的ＢＡ和ＩＢＡ 浓度分别为１．０ ｍｇ／Ｌ和０．０５ ～０．１ ｍｇ／Ｌ,生根适宜的ＩＢＡ浓度为０．４ ｍｇ／Ｌ;培养基中加入ＧＡ３ 和降低ＮＨ４ＮＯ３ 浓度有利于加长生长;用山梨醇作碳源时芽的增殖倍数高于蔗糖,而生根率低;２ 个品种中,“晚红李”的增殖和生长优于“美丽李”,而生根率无明显差异．     

松枯梢病对湿地松,火炬松生长影响的研究

通过对闽侯县、长乐市等地湿地松、火炬松幼林的观察与调查分析表明,松枯梢病使湿地松当年新梢长和梢基部径生长分别降低５６．７３％和３５．８２％。感病新梢的长与径生长随着病害发展而减缓,至６月发病高峰后,其生长与健梢生长的差异明显加剧;病害严重程度与幼树的树高、胸径生长呈负相关。通过对南屿林场２５块１３￣１７年生湿地松样地的该病危害损失测定,建立阿公枯梢病所致的湿地松树高、胸径和材积生长损失的估测模型,     

松枯梢病菌的培养性状和致病力变异及其相互关系

对从我国１３个省（市）１６种松树和其它２种针叶树上收集的松枯梢病菌５５个菌株在６种基质上进行性状培养的研究表明,我国松枯梢病菌在培养性状上存在明显的类群分化,模糊聚类分析将５５个菌株２分为三个类群。采用人工接种方法测定供试菌株对５种实生苗的致病力。结果显示,该病菌的致病力在各菌株、不同松种或不同接种方法间均差异显。供试菌株的致病力分化状况与其在培养性状上所表现出的差异存在明显的相关性。     

球茎甘蓝花托花柄组织培养及其植株再生

球茎甘蓝花托、花柄在ＭＳ＋２,４－Ｄ０．５ｍｇ／Ｌ＋６－ＢＡ１ｍｇ／Ｌ培养基上培养,诱导形成愈伤组织．愈伤组织在ＭＳ＋ＮＡＡ０．５ｍｇ／Ｌ＋６－ＢＡ３ｍｇ／Ｌ的分化培养基上培养,能分化出芽．花托在附加６－ＢＡ和ＧＡ３的ＭＳ培养基上培养,能直接出芽．花柄在附加６－ＢＡ或６－ＢＡ和ＧＡ３的ＭＳ培养基上培养,能直接出芽．芽通过继代培养,能再生植株     

抗饱和性能评价标准的研究

围绕饱和现象发生的本质,以条件作用技术抗饱和方法为例得出抗饱和性能优劣的最终标准应该是控制器的输出与被控对象的输入是否重归连续．     

青花菜组织培养再生体系的研究

采用不同培养基对青花菜（Brassica oleracea var.italica Plenk.)的子叶和下胚轴进行分化培养,结果表明：青花菜不同的外植体的组织培养效果不同,当采用MS基本培养基附加BA0.5mg/L、NAA0.1mg/L和Sucrose5%的处理时下胚轴的不定芽分化频率最高,可达50%;而当培养基中添加BA0.5mg/L、NAA0.1mg/L、Sucrose3%和AgNO34mg/L的子叶的不定芽分化频率最高,约为78%左右;同时在分化培养基中添加不同种类和浓度的激素、蔗糖和AgNO3均对其子叶不定芽的再生具有明显的效应。     

Effect of auxins and cytokinins on efficient plant regeneration and multiple-shoot formation from cotyledons and cotyledonary-node expiants of groundnut (Arachis hypogaea L.) by in vitro culture technology

Tissue cultures were established from cotyledon and cotyledonarynode segments ofArachis hypogaea L. on Murashige and Skoog (MS) medium supplemented with different concentrations of auxins (IAA, NAA, IBA, and 2, 4-D) and cytokinins (KIN and BAP). For callus initiation, high concentration of auxins and low concentration of cytokinins were used, whereas high concentration of cytokinins and low concentration of auxins were used for shoot-bud differentiation. Callus induction and shoot-bud regeneration frequency, however, varied with genotype, expiant, and the different plant-growth regulators combination in the medium. The shoot-bud multiplication was also influenced by genotype, explant type, and growth regulators. The combination of BAP and NAA produced more shoots than other combinations. The maximum number of shoots was obtained from cotyledonary-node segments on a medium containing BAP (5.0 mg/L) and IBA (1.0 mg/L). Rooting of regenerated shoots was achieved on a medium augmented with NAA or IBA (2.0 mg/L) in combination with KIN (0.5 mg/L). Rooted plantlets were successfully established in the soil, where 95% of them survived. Tissue-culture studies of these expiants suggests the shoots to be ofde nova origin, which would make the system suitable for gene-transfer technology.     

Essential oil of <Emphasis Type="Italic">Laurus nobilis</Emphasis> from Montenegro

Steam distilled oil from the shoots, separated leaves, and stem, as well as from the flower of laurel (Laurus nobilis), grown in Montenegro, were analyzed by GC and GC/MS. The yield of essential oil was as follow: 1.4% in young shoots, 1.5% in the separated leaves, and 0.7% in separated stems. The main constituents of all investigated oils were 1,8-cineole, methyleugenol, and α-terpinyl acetate. Besides, α-pinene, β-pinene, sabinene, and linalool were also present. It was interesting and important for commercial samples of laurel essential oil that there was no significant difference among the essential oil obtained from young shoots and those obtained from leaves and stem. The main constituents of the flower oil were 1,8-cineole (15.7%), β-caryophyllene (9.5%), γ-muurolene (7.1%), α-terpinyl acetate (6.5%), and methyleugenol (3.9%). Published in Khimiya Prirodnykh Soedinenii, No. 4, pp. 337–339, July–August, 2007.     

腕、指关节的灵活性对投篮技术的影响的实验研究

通过对投篮过程中腕、指关节的技术分析和一系列的实验的研究,证明腕、指关节的灵活性对投篮技术有着极其重要的影响,并探索出一种可以有效提高篮球运动员腕、指关节灵活性的极为有效的训练方法．