Significance of the Adaptivity of Ceriops tagal Wood Structure Change under Different Habitats

研究了中、高潮位生境角果木的木材结构特征。与高潮位生境生长的角果木木材结构特征相比,中潮位生境生长的角果木木材结构特征有利于提高水分输导的安全性和增强抗风浪冲击的能力。 【英文摘要】 This paper researched the Ceriops tagal wood structure characteristics under the middle and high tidemark haditats.The wood structure characteristics of C.tagal grew under the middle tidemark habitat advantaged raising the moisture transfusion security and increasing the ability of resisting the wind and wave,strikes.国家自然科学基金"红树植物陆海迁移进化过程的木材结构与能量比较研究"资助项目(4957629

Wood Anatomy Characteristics of 6 Mangrove Species of Sonneratia and Their Application

应用光镜及扫描电镜对生长在热带、亚热带海岸潮间带的 6种海桑属红树植物的次生木质部进行了解剖学研究表明 :海桑属 6种红树植物的次生木质部具有导管直径小 ,导管分布频率高 ,复孔率高 ,导管壁厚和纤维壁较厚且具次生加厚 ,木薄壁组织缺乏或稀少等与环境相适应的特点。海桑属 6种红树植物的数量特征还表明 :海桑、无瓣海桑、卵叶海桑的木材可能适合造纸。The study reveals that the secondary xylem of 6 mangrove species of Sonneratia possesses the following characteristics:the diameter of vessel is small,the distribution frequency of vessel is high,the reperforating rate is high,the wall of vessel is thick,the wall of fibre is relatively thick and the wood parenchyma is short or sparse,whish is suitable with the environment.The quantitative feature of 6 mangrove species of Sonneratia also indicates that the wood of S.caseolaria,apetalous sonneratia and ovate-leaf sonneratia is probably suitable for paper-making.国家自然科学基金资助项目! (495 76 2 95

WOOD STRUCTURES OF SOME SONNERATIA SPECIES AND THEIR ADAPTATION TO INTERTIDAL HABITATS

通过光学显微镜和扫描电子显微镜详细观察了相似生境条件下生长的海桑属 (Sonneratia)植物以及低、高潮位生长的海桑 (S .caseolaris)和杯萼海桑 (S .alba)次生木质部的形态特征 ,应用Lasersharp软件测量了其次生木质部的数量特征。结果表明 :海桑属植物次生木质部形态特征的特化是与潮间带生境相适应的 ,能在水分胁迫的生境中 ,有效地协调水分输导的有效性和安全性。其特化结构主要包括 :1)宽、窄导管并存 ,2 )管孔密度较大 ,复孔率高 ,3)存在纤维状导管、形状不规则的导管和少量环管管胞 ,4 )螺旋雕纹、附物纹孔、管壁具疣等许多导管壁的微观结构 ,有利于水分输导的安全性 ,5 )射线细胞和分隔木纤维内的淀粉粒是渗透调节的物质基础 ,有利于促进水分上升 ,6 )薄的纤维壁厚和宽的纤维腔径有利于水分的贮存 ,7)具胶质纤维。相似生境条件下生长的海桑属植物次生木质部数量特征的测量结果表明海桑和拟海桑水分输导效率高 ,但水分输导安全性差 ,而杯萼海桑水分输导效率低 ,但其输导安全性高。与高潮位生长的海桑和杯萼海桑相比 ,低潮位生长的海桑和杯萼海桑次生木质部导管分子更加“小型化”(有更... 【英文摘要】 This study of the wood anatomy of Sonneratia was undertaken to explore the relationships between wood structure and its adaptive significance to mangrove habitats. The morphological features of the secondary xylem of six Sonneratia species growing in similar tidal habitats as well as individuals of S. caseolaris and S. alba growing in low and high tidal zones, respectively, were studied in detail by means of optical microscope and scanning electron microscope. Both the interspecific variation of the quantit...国家自然科学基金资助项目 ( 4 95 762 95

Stduy on Comparative Anatomy of Secondary Xylemin Six Sonneratia Species of Mangroves

应用光学显微镜、扫描电子显微镜和激光扫描共聚焦成像显微镜对海桑属 6种红树植物木材结构进行观测 .首次报道了海桑属植物具有纤维状导管分子 ,并对其生态学意义进行了讨论 .同时对其次生木质部的形态结构特征的共同点和不同点进行了总结和描述 ,以作为比较解剖学的依据 ,进一步讨论海桑属与红树植物其它属木材结构相异的原因 .对海桑属与同一科的八宝树属(Daubanga)木材结构进行比较倾向于支持海桑属和八宝树属应独立为同属一科的两族The morphological features of secondary xylem in six species of Sonneratia p lants were survered by means of optical microscope, scanning electronic microsco pe and laser scanning confocal microscope. Fibriform vessel elements in Sonner atia plants were first reported and their ecological significance was discusse d. Similarities of wood features in Sonneratia plants were represented as wo od comparative evidence for comparing it with other mangrove genera Bruguiera, Ceriops, Kandelia, Rhizophora, Avicennia, Aegiceras. The results showed that a few w ood features in Sonneratia were recognized to delimit it except for uniserat e rays. Comparison of wood anatomical features between Sonneratia and Daub anga , belonging to the same family, suggests that they are possibly treated as two separate tribes.国家自然科学基金资助项目 (4 95 762 95

Genetic diversity and differentiation of Aegiceras corniculatum populations in three different habitat

采用垂直板型聚丙烯酰胺凝胶电泳测定了三种不同生境的桐花树(Aegicerascorniculatum)种群的遗传多样性和遗传分化。桐花树种和种群水平都维持有较高的遗传变异性 ,观察杂合度分别为 0 .2 52和 0 .2 44,期望杂合度分别为0 .2 66、0 .2 40。种群间遗传分化系数为 0 .12 7,表明总的遗传变异中有 12 .7%来自种群间。种群间遗传距离和遗传一致度均值分别为 0 .0 60和 0 .964,基因流畅 ,Nm =2 .187。Genetic diversity and genetic differentiation of A.corniculatumpopulations in three different habitats were investigated using the assay of vertical slab polyacrylamide gel electrophoresis. The results showed that relatively high level of genetic diversity among species and population level was maintained. Observed heterozygosities at species and population level were 0.252 and 0.244 respectively, and expected heterozygosity were 0.266 and 0.240 respectively. The coefficient of gene differentiation between populations was 0.127, which showed that 12.7% of total heterozygosity came from inter population. The genetic distance and genetic identity between populations were 0.06 and 0.964 respectively. Gene flow was smooth, N m= 2.187.国家教育部博士学科点专项科研基金!资助项目(1999038410号

Wood Anatomy of Some Sonneratia Species inRelation to Phylogenetic Significance

研究了海桑科海桑属(Sonneratia)6种植物的木材结构特征,并与同科的八宝树属(Duabanga)、千屈菜科的紫薇属(Lagerstroemia)植物的木材结构进行比较。结果表明1.射线高度和射线宽度可作为卵叶海桑区别于其它种类的鉴定特征或辅助特征;2.海桑属形成一单系的类群,并与紫薇属有更近的亲缘关系,而与同科的八宝树属的亲缘关系更远;3.导管数量特征的聚类分析可以推测海桑属植物沿两支进化,一支进化为水分输导效率高的种类(即导管直径宽和输导面积大,管孔密度小,如海桑和拟海桑),另一支进化为水分输导安全性高的种类(即导管直径窄、输导面积小,管孔密度大,如杯萼海桑、卵叶海桑、无瓣海桑、海南海桑)。 【英文摘要】 Wood structure of six Sonneratia species from Mangrove Nature Reserve at Dongzhai Port, Hainan Province, was observed under LM, SEM and Laser scanning confocal microscope. Ray height and ray width can be used for diagnostic or subsidiary diagnostic features to distinguish S. ovata from other Sonneratia species.Sonneratia forms a monophyletic group which has a closer affinity to Lagerstroemia (Lythraceae) instead ofDuabanga (Sonneraceae). The result of clustering based on quantitative data of vessel elements...国家自然科学基金(49576295)项目资

Genetic structure of Avicennia marina population in different habitats

本文研究了广西沙质土壤和淤泥质土壤白骨壤种群的遗传多样性和遗传分化 .结果表明 ,不同生境的白骨壤种群维持着较高的遗传多样性 ,观察杂合度为 0 .35 0 ,预期杂合度为 0 .2 5 9.不同生境的白骨壤种群的遗传分化很低 ,种群间的遗传分化为FST=0 .0 6 2 ,表明总的遗传变异中有 93.8%来自种群内 .基因流顺畅 ,Nm=3.78.种群间的遗传一致度和遗传距离分别为 0 .95 5和 0 .0 46The genetic variation and genetic differentiation were investigated in Avicennia marina populations in sandy soil and slity soil in Guangxi. It showed that Avicennia marina populatioin in different habitats maintained relatively high level of genetic variation, observed heterozygosity was 0.350, and expected heterozygosity was 0.259; genetic differentiation in Avicennia marina population in different habitats was low, F ST =0.062, which showed that among total heterozygosity, 93.8% came from intar populations, the genetic distance and genetic identity between population was 0.046 and 0.955 respectively, gene flow was smooth, which was 3.78.[WT5F1]国家教育部博士学科点专项科研基金资助项目!(19990 38410

福建沿岸地区红树林的种类与分布

本次调查活动得到了福建省林业厅和沿海各县市林业部门的大力支持，国家海洋局第三海洋研究所的林惠来同志对本文的修改提供了许多宝贵意见，特表谢意。王文卿，男，1971年3月出生，博士，现在厦门大学化学博士后流动站工作。[中文文摘]于1998年11月至1999年1月对福建沿岸地区的红树林进行了调查，就福建红树林的种类组成、面积、分布情况、人工造林情况进行了论述，并就制约福建发展红树林的因素及解决方法提出了一些建议。[英文文摘]On the basis of an investigation on the mangroves in Fujian from November 1998 to January 1999,the species composition,area,distribution,artificial afforestation of mangroves and the factors that restricted the development of mangroves in Fujian were discussed.Some suggestion on how to development mangroves in Fujian was put forward

Study on Wood Anatomy of Lumnitzera Species

通过光学显微镜、扫描电子显微镜、激光共聚焦扫描显微镜详细观察了榄李属2种红树植物次生木质部的形态特征.应用Lasersharp软件测量了其次生木质部的数量特征.结果表明:1)榄李属植物的木材结构具有与海岸潮间带生境相适应的特征;2)榄李和红榄李生态隔离现象导致这两种植物次生木质部数量特征具有显著差异;3)榄李属植物附物纹孔的差异具种类鉴定意义;4)榄李属植物次生木质部管孔直径、管孔密度及附物纹孔的差异表明附物纹孔的结构有助于水分运输的安全性. 【英文摘要】 The morphological features in secondary xylem of 2 Lumnitzera species were surveyed in details by means of optical microscope, scanning electronic microscope and laser scanning confocal microscope. The quantitative features in secondary xylem were measured by means of software Lasersharp. These results showed as follows: 1) wood structures are adaptive to the intertidal habitats. 2) the differences in wood structure between L.littorea and L. racemosa presumably stem from the different ecological sites that ...国家自然科学基金(49576295)资