薮北茶的组织培养   总被引：7，自引：0，他引：7  

张娅婷  张伟 《周口师范学院学报》2004,21(5):74-76

用薮北茶带腋芽的茎段作为外植体进行组织培养获得再生植株,并建立快速无性繁殖系.以MS为基本培养基,附加各种浓度的植物激素.试验结果表明,芽增殖培养基为1/2MS 1.0mg/L BA 0.2mg/L IBA;生根壮苗培养基为1/4MS 0.5mg/L BA 0.1mg/L IBA 0.01mg/L Al3 .  相似文献   

栽培因子对白肋烟叶片组织结构的调控     

柴家荣  刘敬业 《昆明师范高等专科学校学报》2006,28(4):17-22

研究表明：叶厚、栅厚、海厚、组织比、上表皮厚度等与烟叶品质和产量关系较密切的关键特征基本上都是TN86〉KY907〉TN90〉KY908〉K26〉KY8959，因而应以TN86，KY907，TN90的叶片组织结构较好．叶厚、栅厚、海厚、组织比、栅厚／叶厚及上下表皮厚度与栅栏组织细胞宽度等均随种植密度增加、封顶期后移和留叶数增多而呈下降趋势，但从低水平至中等水平的降幅很小，而从中水平至高水平的降幅较大；随施N量加大而呈上升趋势，低N至中N的升幅远大于中N至高N的升幅，施N量的作用大于种植密度，封顶期的效应远大于留叶数，且各项观测值均随叶位升高而增加．因而以18000株／hm^2，施N300kg／hm^2，全田50％现蕾后5d一次性封顶和留叶21～22片的试验组合的叶片组织结构较理想．叶片组织结构的关键特征均以完熟时最大、过熟时最小、初熟时在二者之间，下、中、上各叶位分别在封顶后第三、四、五周达完熟状态，兼顾各叶位宜在第4周砍收．  相似文献   

植物组织培养中外植体发生褐变的原因及防止措施   总被引：2，自引：0，他引：2  

刘玲玲 《喀什师范学院学报》2011,32(3):44-46

通过对植物组织培养中外植体发生褐变的情况,分析了发生褐变的可能原因,并提出了相应的防止措施.  相似文献   

药用、食用、观赏用百合组培快繁研究进展   总被引：2，自引：0，他引：2  

阮瑶瑶  丁健  杨懋勋 《深圳职业技术学院学报》2011,10(1):71-75

百合是商品价值很高的植物品种,有药用、食用、观赏等用途．应用植物种苗组织培养快速繁殖技术,可在短期内生产大量优质的百合种苗．现阶段国内广泛开展了对百合的组织培养和植株再生途径的研究,百合的组织培养研究已较为成熟,多种外植体都可诱导分化出植株．本文从外植体和基本培养基的选择、激素对初代、增殖及生根培养的影响、组培苗移栽等方面,综述了近年来国内的药用、食用、观赏用百合组培快繁研究的现状．  相似文献   

大花重瓣矮牵牛植株再生条件的研究     

江爱明  刘恒超  贾志强  王峰尖  刘冬梅 《郧阳师范高等专科学校学报》2011,31(3):88-89

矮牵牛在生产中常采用播种繁殖。但是种子大都是从国外进口的,价格昂贵,为了更快的获得大量种苗,通过对矮牵牛进行了快速繁殖方法的实验．主要采用组织培养技术繁殖．经半年多的研究和配方试验,掌握了矮牵牛的组织培养配方及技术,大大缩短了其繁殖周期．并保持其品种的稳定性．  相似文献   

金属烤瓷冠修复牙周组织的临床观察和研究     

王建国 《雁北师范学院学报》2011,27(1)

目的通过对临床病例的分析,探讨金属烤瓷冠修复对牙周组织的影响。方法选择全冠修复后因牙周肿胀不适就诊的61例患者共90颗患牙作为观察对象,检查牙周组织健康状况并进行临床评价。结果出现龈缘红肿的占37%,牙龈萎缩的占24%,邻间隙黑洞的占16%,牙石附着占23%,其中两种以上损伤占18%。结论金属烤瓷修复体的种类、形态、颈缘位置及密合度、光滑度和口腔卫生习惯均对牙周组织具有明显的影响。  相似文献   

A stage-specific cell-manipulation platform for inducing endothelialization on demand     

Qilong Zhao  Juan Wang  Yunlong Wang  Huanqing Cui  Xuemin Du 《国家科学评论(英文版)》2020,7(3):629

Endothelialization is of great significance for vascular remodeling, as well as for the success of implanted vascular grafts/stents in cardiovascular disease treatment. However, desirable endothelialization on synthetic biomaterials remains greatly challenging owing to extreme difficulty in offering dynamic guidance on endothelial cell (EC) functions resembling the native extracellular matrix-mediated effects. Here, we demonstrate a bilayer platform with near-infrared-triggered transformable topographies, which can alter the geometries and functions of human ECs by tunable topographical cues in a remote-controlled manner, yet cause no damage to the cell viability. The migration and the adhesion/spreading of human ECs are respectively promoted by the temporary anisotropic and permanent isotropic topographies of the platform in turn, which appropriately meet the requirements of stage-specific EC manipulation for endothelialization. In addition to the potential of promoting the development of a new generation of vascular grafts/stents enabling rapid endothelialization, this stage-specific cell-manipulation platform also holds promise in various biomedical fields, since the needs for stepwise control over different cell functions are common in wound healing and various tissue-regeneration processes.  相似文献   

澳门学生的体脂率以及与部分运动素质项目的相关研究   总被引：2，自引：0，他引：2  

陈及治  缪进隆  王人卫 《体育科学》1998,(2)

通过对澳门青少年的体质调查和统计分析,得出澳门青少年的体脂率均数、年龄变化及性别差异;得出澳门青少年相邻年龄组体脂率均数差别的检验结果、体指率分布的正态性检验结果、体脂率与部分运动素质项目相关分析的结果,为体育教育和健康辅导等提供依据性资料。  相似文献   

Potential Chemoprevention of 7,12-Dimethylbenz[a]anthracene Induced Renal Carcinogenesis by Moringa oleifera Pods and Its Isolated Saponin     

Veena Sharma  Ritu Paliwal 《Indian journal of clinical biochemistry : IJCB》2014,29(2):202-209

Present investigation shows that hydroethanolic extract of Moringa oleifera (MOHE) and its isolated saponin (SM) attenuates DMBA induced renal carcinogenesis in mice. Isolation of SM was achieved by TLC and HPLC and characterization was done using IR and ¹H NMR. Animals were pre-treated with MOHE (200 and 400 mg/kg body weight; p.o), BHA as a standard (0.5 and 1 %) and SM (50 mg/kg body weight) for 21 days prior to the administration of single dose of DMBA (15 mg/kg body weight). Administration of DMBA significantly (p < 0.001) enhanced level of xenobiotic enzymes. It enhanced renal malondialdehyde, with reduction in renal glutathione content, antioxidant enzymes and glutathione-S-transferase. The status of renal aspartate transaminase, alanine transaminase, alkaline phosphatase and total protein content were also found to be decreased along with increase in total cholesterol in DMBA administered mice. Pretreatment with MOHE and SM significantly reversed the DMBA induced alterations in the tissue and effectively suppressed renal oxidative stress and toxicity.  相似文献   

芡实组培快繁无菌体系的建立和优化     

李彦连  张华丽  赵强  魏晓丽  王艳新  张希才 《济宁师范专科学校学报》2014,(6):11-13

以芡实的单芽茎段为外植体进行离体培养和植株再生的优化研究.结果表明,以MS+6-BA1.5mg/L+NAA 0.2mg/L作增殖继代培养基为宜,以在MS培养基+蔗糖20g/L+琼脂5.0g/L中添加6-BA(0.1mg/L)+NAA(0.1mg/L)作生根培养基为宜,生根率最高.适当浓度的6-BA对芡实的不定芽增殖有明显的促进作用,6-BA和NAA配合使用可促进芽苗生长,对改善芡实植株组培苗质量有较好的作用.  相似文献