荔枝次生木质部导管分子及穿孔板观察研究

运用细胞图像分析系统及显微照相的方法,对荔枝次生木质部导管分子进行了观察研究。在荔枝的次生木质部中导管分子存在着多种的样式,并且导管分子穿孔板存在着3种类型:两端均为一个单穿孔板;一端一个单穿孔板另一端两个单穿孔板;一端两个单穿孔板另一端三个单穿孔板。分别对其进行了描述,并从导管分子个体发育与系统发育的角度进行了讨论。     

台湾青枣导管分子及其穿孔板研究

运用细胞图象分析系统及显微照相的方法对台湾青枣Z iziphus mauritiana次生木质部导管分子进行了观察研究。在台湾青枣的次生木质部导管分子中存在着许多不同的样式,并且导管分子穿孔板存在着3种类型:两端均为一个单穿孔板;一端为一个单穿孔板,另一端为梯状穿孔板;具纤毛的单穿孔板。分别对其进行了描述,并从导管分子个体发育与系统发育的角度进行了讨论,认为3种类型的穿孔板为导管分子穿孔板的系统演化提供了新的证据。     

水同木次生木质部导管分子观察研究

运用细胞图像分析系统及显微照相方法,观察研究水同木次生木质部导管分子。结果发现,水同木次生木质部导管分子中存在着许多不同的样式,大多数导管分子短而宽,多数无尾或仅一端具尾;导管均为单穿孔板,未发现有侵填体。     

余甘子次生木质部导管分子观察研究

运用细胞图象分析系统及显微照相的方法,对余甘子次生木质部导管分子进行观察研究.结果发现,余甘子次生木质部导管分子中存在着许多不同的样式,导管分子大多数具尾;其穿孔板存在着两种类型:(1)两端均为1个单穿孔板;(2)一端为1个单穿孔板另一端为2个单穿孔板;(3)极少数的导管分子具有特殊的内含物;(4)管间纹孔式为互列纹孔式;(5)导管射线间纹孔式为混合型纹孔与横列刻痕状纹孔以及梯状穿孔.     

阳桃次生木质部导管分子及侵填体的研究

运用细胞图象分析系统和显微照相的方法对阳桃次生木质部导管分子进行了观察研究。次生木质部导管分子类型有两端具尾导管、一端具尾导管和无尾导管。导管分子穿孔板存在着2种类型:两端均为一个单穿孔板;一端为一个单穿孔板,另一端为具两个单穿孔的复穿孔板。48%的导管分子具有囊状侵填体;管间纹孔式为互列纹孔式。     

芒果次生木质部导管分子的观察

运用细胞图象分析系统及显微照相的方法对芒果(Mangifera indicaL.)次生木质部不同的导管分子进行了观察。并且对这些导管分子的构造、进化趋势以及同一导管分子上的特殊结构进行了详细的讨论。     

类叶升麻(毛茛科)次生木质部管状分子的研究

利用扫描电子显微镜对毛良科类叶升麻（Artaea asiaticaHara）根和根状茎次生木质部中的管状分子进行观察．发观其管状分子类型丰富,主要有：管胞、管胞状导管、纤维导管和典型的导管分子,其中管胞、管胞状导管和纤维导管为在该类群中首次报道;在导管分子中．存在着梯状穿孔板、网状穿孔板、混合型穿孔板和单穿孔板．其中网状穿孔板和混合型穿孔板为在陔类群中的首次报道;对其导管分子上的侧壁穿孔板、多穿孔板和纹孔膜残余也进行了描述。根据类叶升麻次生木质部中多变的管状分子类型,认为以往积累的有关毛茛科植物管状分子类型及导管穿孔板类型是小个面的,因此以该性状为参考作出的有关某一个类群的原始性和进化性的推论也是不可靠的。同时探讨了不同类型管状分子作类叶升麻不同器官的分布与其生理功能和生态环境的关系,同时将该植物作为毛莨科的代表类群．与其它基邴类群植物导管分子进行了比较。     

十齿花次生木质部和次生韧皮部的解剖学研究

对十齿花的次生木质部和次生韧皮部结构进行了观察,并与卫矛科其它８属植物的木质部作子下齿花次生木质部和次生韧皮部的主要特点是;木质部导管分子相对较长,其末端倾斜,具梯状穿孔板,由１４个横隔组成。纤维和纤维管胞均有横隔。韧皮部筛管分子相对较短,其端壁水平或略倾斜,具单筛板,缺少纤维。     

洋蒲桃次生木质部中导管分子的解剖学

运用细胞图像分析系统和显微照相的方法对洋蒲桃（Syzygium samarangense）次生木质部导管分子进行了观察研究。次生木质部导管分子类型有：两端具尾导管、一端具尾导管和无尾导管。导管分子穿孔板存在着4种类型：两端均为具2个单穿孔的复穿孔板;一端为1个单穿孔板,另1端为具2个单穿孔的复穿孔板;两端均为单穿孔板：两单穿孔板位于同一端壁两侧相互对应以及一些过渡类型穿孔板。根据观察结果,分析了各类型穿孔板之间的演化关系。     

洋蒲桃次生木质部中导管分子的解剖学

运用细胞图像分析系统和显微照相的方法对洋蒲桃(Syzygium samarangense)次生木质部导管分子进行了观察研究。次生木质部导管分子类型有: 两端具尾导管、一端具尾导管和无尾导管。导管分子穿孔板存在着4种类型: 两端均为具2个单穿孔的复穿孔板;一端为1个单穿孔板, 另1端为具2个单穿孔的复穿孔板;两端均为单穿孔板;两单穿孔板位于同一端壁两侧相互对应以及一些过渡类型穿孔板。根据观察结果, 分析了各类型穿孔板之间的演化关系。     

Phenolic constituents from Grevillea robusta

Seven phenolic compounds were isolated from a MeOH extract of the leaves of Grevillea robusta. Their structures were determined by various spectral methods including 2D NMR spectroscopy.     

台湾乳白蚁对南宁市园林树木的为害及其筑巢规律

在广西南宁市调查台湾乳白蚁Coptotermes formosanus Shiraki对园林绿化树木的危害情况及其筑巢规律。结果表明,在调查的57种树木中,有44种树木受到台湾乳白蚁的侵害,占调查树种的77.19%,树木受害株率13.38%,严重受害株率1.63%。侧柏Thuja arientalis、荫香Cinnamomum burmannii和银桦Grevillea robusta的严重受害率最高,分别为15.85%、13.43%和11.11%。台湾乳白蚁筑巢对树木种类有明显的选择性,可在树心筑巢的树种有16种,隶属于11科14属,其中筑巢率较高的树种为荫香、侧柏、银桦和桂花树Osmanthus fragrans,分别占所调查树木的16.42%、15.85%、11.11%和10.91%;其次为樟树Cinnamonaom camphora、大叶桉Eucalyptus robusta和白千层Melaleuca leucadendta,筑巢率分别为7.98%、5.76%和3.42%。     

Cluster root development in Grevillea robusta (Proteaceae). I. Xylem, pericycle, cortex, and epidermis development in a determinate root

The cluster roots of Grevillea robusta A. Cunn. ex R. Br. are composed of determinate rootlets that stop growing, but remain physiologically active for several months. Their apical organization, both before and after maturation, was studied by light and transmission electron microscopy. Each cell layer forms a dome, with an initial cell at its end. Xylem elements form a complicated triarch array at the base of the rootlet, passing along the rootlet as two files, and then joining at the tip to form a single file, surrounded by six pericycle cells. At the base of the rootlet, shorter xylem cells and thick-walled support cells are visible. A root cap, present in rootlets grown in vermiculite, was eventually displaced by root hair growth. Rootlets grown in Hoagland's solution lacked root caps and were significantly shorter than those grown in vermiculite. Cell fate was analysed in terms of cell position and is discussed in terms of pattern and development.     

广西南宁市园林树木白蚁发生种类及危害情况

2009年311月对南宁市园林树木白蚁为害情况进行了调查。结果表明,台湾乳白蚁Coptotermes formosanus Shiraki是危害园林树木的优势种;调查的57种树木中,45种树木受到了白蚁的侵害,占总数的78.95%,树木受害株率达13.11%,严重受害株率为1.66%。银桦、侧柏和樟树等树种受白蚁危害最为严重。     

Cluster root development in Grevillea robusta (Proteaceae). II. The development of the endodermis in a determinate root and in an indeterminate, lateral root

Light, fluorescence and electron microscopy were employed to follow the development of the endodermis in cluster roots and lateral roots of Grevillea robusta A. Cunn. ex R. Br. Endodermal cells had three different origins: rootlet endodermis arose from the rootlet meristem; endodermis covering the primordium shortly after initiation came from division of parental endodermis; cells at the junction between parent and rootlet endodermis developed from re-differentiated rootlet cortical cells. In the cluster root, the Casparian band formed in three ways, and was not initially present opposite the two sets of single xylem elements in the rootlet stele. A new clearing technique was developed that allowed visualization of xylem, suberized endodermis, Casparian band formation and phenolic compounds. In lateral roots, endodermal differentiation was asynchronous, but was related to position relative to protoxylem poles. However, the observed delay began before these poles had differentiated. At the tip of mature rootlets, which are determinate, the endodermis terminates in a 'dome' of cells, with the initial cell differentiating as an endodermal cell. Results are discussed in terms of determinate development in roots and the spatial and temporal contexts within which this development takes place.     

Studies in the Proteaceae: III. Embryology of Grevillea Banksii R. Br.

The embryo-sac of Grevillea Banksii R. Br. develops accordingto the normal type. At the time of fertilization is has a veryirregular outline. The synergids show a well-marked filiformapparatus. The development of the embryo is similar to that in the twomembers of the family previously studied (Kausik, 1938, 1938a). The endosperm becomes cellular. The presence of the vermiformappendage of the endosperm described in Grevillea robusta (Kausik,1938), has been demonstrated here. Though similar in both, theendosperm of G. Banksii shows a narrow middle region with rowsof elongated cells which are absent in G. robusta. In conclusion, the writer has great pleasure in acknowledginghis indebtedness to Prof. M. A. Sampathkumaran, of the Universityof Mysore, for encouragement and kind help during the courseof this investigation. Thanks are also due to the Curator, GovernmentBotanic Gardens, Ootacamund, and Sim's Park, Coonoor, Nilgiris,South India, for permission to collect the material for thisstudy.     

Evaluation of thermally modified Grevillea robusta heartwood as an alternative to shortage of wood resource in Kenya: Characterisation of physicochemical properties and improvement of bio-resistance

Heat treatment of Grevillea robusta, a tropical wood species of low natural durability, was carried-out under inert conditions to improve its decay resistance. Resistance of heat treated samples was evaluated by malt agar block tests after three months of exposure to several wood rotting fungi. Also resistance of heat treated wood against termites was tested in the laboratory and in the field. Results showed that durability against fungi and termites was greatly improved after treatment. There was a good correlation between decay resistance and mass loss due to thermal treatment. Microscopic, FTIR and (13)C MAS NMR analysis were performed to characterize wood chemical and anatomical modifications that occur after treatment to understand the reasons of the durability improvement.     

Fertilizing Pollen Tubes Parasitise Ovary Wall in Grevillea

Tissue-invasive pollen tube branching occurs in an Australianshrub, Grevillea banksii R.Br. (Proteaceae). Parenchyma andphloem of the ovary wall are soon infiltrated after fertilization,by intercellular branches and the lumina of xylem elements areentered. Ovular tissues are not affected. Grevillea banksii, pollen, haustoria, ovary wall