天山云杉人工幼林树冠结构及其在林分间伐中的应用研究

本文对天山云杉人工幼林树冠结构以及树冠结构与林木之间的关系进行了研究，并基于生物学原理，在确定有效树冠的法础上，通过决定林木能力的树冠特征对其人林分间伐中的应用进行了初步研究。     

菊花18个品种的RAPD分析

 采用RAPD 技术分析了18 个菊花品种DNA 的多态性。从80 个10 碱基随机引物中筛选出多态性频率高的3 个引物。扩增的多态性片段在600 bp～1300 bp 之间。检测出两个品种特有的分子标记, ‘大红托桂’有OPD15 (1200 bp) ,‘玉翎管’缺失OPA17 (1100 bp) 。瓣型一致的品种间基因型相似系数较高。     

浙江地区不同品种紫花苜蓿不同刈割期二茬性状表现

对不同秋眠级别的紫花苜蓿Medicago sativa品种进行适应性试验,研究不同品种不同刈割期株高、分蘖数、根系、茎叶比及生物学产量间的变化,为生产推广提供指导.     

菊花花瓣伸长相关基因CmXTHs的克隆与功能验证

从杭白菊(Chrysanthemum morifolium‘Hangbaiju’)中克隆了4个细胞壁松弛和伸展相关的木葡聚糖内转糖苷酶/水解酶基因,分别命名为CmXTH1、CmXTH2、CmXTH3和CmXTH4,序列分析表明其编码的氨基酸序列N端都含有23~30个氨基酸组成的信号肽区域和保守的催化活性位点DE(I/L)DEFLG以及紧邻的N(R/A)T组成的N端糖基化位点,CmXTH1/2/3的C端均含有4个保守的半胱氨酸残基,CmXTH1/2/3/4蛋白的相似度为66.2%。系统进化分析结果表明,CmXTH1/2/3属于XTH家族Ⅰ组,CmXTH4属于Ⅱ组。实时荧光定量结果表明:(1)菊花CmXTH1/2/3/4在根、茎、叶和花蕾中均有表达。CmXTH1在根中表达量较高,CmXTH2/3在茎中表达量较高,CmXTH4在花蕾中表达量最高。(2)CmXTH1/2/3/4在花序不同部位表达量有差异,CmXTH1/4在舌状花中表达量最高,CmXTH2/3在筒状花中表达量较高。(3)CmXTH1/2/3/4在舌状花不同发育阶段表达量差异显著,CmXTH1/2在盛花期表达量最高,CmXTH3在衰老期表达量最高,CmXTH4在初开期表达量最高。病毒诱导基因沉默结果表明,CmXTH1/2/3/4沉默系的花序直径和舌状花长度与对照相比均有所减小,其中CmXTH4沉默系减小最大,分别减小了25.67%和10.42%,舌状花花瓣表皮细胞与对照相比明显变小,影响了舌状花花瓣的伸长;CmXTH2沉默系的筒状花雄蕊长度和CmXTH4沉默系的花萼直径分别与对照相比显著减小。这表明菊花CmXTH1/2/3/4基因参与了花序的开放,促进了舌状花花瓣的伸长,对于菊花的花序增大具有重要作用。     

不同配方保鲜液对康乃馨鲜切花保鲜效果的影响

为提高康乃馨鲜切花的保鲜效果,以鲜切花康乃馨马斯特(Dianthus caryophyllus L.Master)为试材,以乙醇、蔗糖、8-羟基喹啉、硝酸钙的不同混合液为保鲜液,测定不同保鲜液处理对马斯特相关指标的影响。结果表明:不同保鲜液处理在增大花径、保持鲜切花水分平衡、延缓花瓣膜透性增加、抑制鲜切花体内膜脂过氧化等方面均优于对照;其中保鲜液采用3%乙醇+3%蔗糖+200mg·L~(-1) 8-羟基喹啉+200mg·L~(-1)硝酸钙处理效果最好,相比对照能够延缓衰老进程、提高观赏价值,可以作为康乃馨鲜切花的理想保鲜液进行使用。     

莫氏兰的品种选育和栽培技术研究

对从新加坡引进的莫氏兰进行适应性栽培。筛选出Mokara Adisa、M. Red、M. Dinah Shore、M. Chittl Orange Spot、M. Chao Praya Gold、M. Chao Praya Boy、M. Chark Kuan Pink、M. Kitiya共8个适宜在海南省三亚市栽培的莫氏兰优良切花品种，并对莫氏兰优良品种的主要栽培技术进行介绍。     

榄溪菊韵的景观特色分析

小榄菊花会是广东省中山市小榄镇一项重要的民俗活动。以菊花会200周年景点之一的榄溪菊韵为例,从园林景观的角度分析了菊花与湿地景观融合、菊花与园林造景等方面的关系,为菊花在园林中的应用提供了新的思路,阐述弘扬小榄菊花文化和保护湿地的重要性。     

Effects of cerium on the antioxidant defence system in the petals and the contents of pigments in the calyces of Rosa chinensis Jacq. cut flower

To study the role of cerium (Ce) in regulating the vase life of Rosa chinensis Jacq. cut flowers, the effects of cerium nitrate (Ce(NO₃)₃) on the activities of antioxidant enzymes, the contents of malondialdehyde (MDA) and hydrogen peroxide (H₂O₂) in the petals, and the contents of chlorophyll a, chlorophyll b and carotenoids in the calyces were investigated. The results showed that Ce(NO₃)₃ evidently enhanced the activities of peroxidase (POD), catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), glutathione S-transferase (GST) and glutathione peroxidase (GPX), and evidently decreased the contents of MDA and H₂O₂ in the petals, compared with the control. Moreover, Ce(NO₃)₃ evidently increased the contents of chlorophyll a, chlorophyll b and carotenoids in the calyces. The results also showed that Ce(NO₃)₃ evidently increased the numbers of open flowers and decreased the numbers of wilted flowers. Our results suggest that Ce(NO₃)₃ extended the vase life of R. chinensis Jacq. cut flower by improving the antioxidant defence system in the petals and the contents of pigments in the calyces.     

Visualization of the FEM Analysis Data of 3D on the Cut Plane

The colored patterns on arbitrary cut plane is an important method in 3D data-field visualization of finite element.By using the technology of the Object-Oriented Programming and the method of scan-line,the colored patterns on arbitrary cut plane are given.The example by the OPENGL of Visual C++ R6 can support the theory satisfactorily.     

New Algorithms for Data Discretization Based on Rough Set Theory

The discretization of real values is always one of the key problems to be solved in the domain of machine learning for its great contribution to speeding up the followed learning algorithms, cutting down the real demand of algorithms on running space and time, and improving the clustering capability of the ultimate learning results. The basic characteristics and framework of discretization approaches based on rough set model are analyzed at first, then the different measurements of the importance of candidate cuts are discussed and researched. Two new heuristic algorithms are put forward to finally select the useful cuts from a candidate set. The selected cuts of the two algorithms will adequately maintain the discernible relation of information systems for their full considering the specialty of rough set, which perfectly embodies the advantages of this theory. Moreover, excellent discretization results may be expected through these heuristic algorithms.