厦门地区百合新品种引种栽培

本文总结了厦门园林植物园25个百合新品种的引种栽培表现,探讨栽培管理中光照、温度、土壤pH、施肥、病虫害等若干因素的影响。     

厦门地区云南樟的引种与养护管理探究

本文以邓小平在厦门市园林植物园的手植树为例,对云南樟的生物学特性、资源分布及在厦门地区的引种情况进行分析,认为:厦门植物园内云南樟生长异常的重要原因是根系活动环境恶化;厦门南亚热带海岛气候条件是导致其速生、提前衰老的主要原因之一,并提出相应的养护管理措施。     

贵州省植物园引种苏铁蕨成功

贵州省植物园引种苏铁蕨成功①王用平魏德生曾莉莉陈德明（贵州省植物园,贵阳５５０００４）苏铁蕨（Ｂｒａｉｎｅａｉｎｓｉｇｎｉｓ（Ｈｅｅｋ．）Ｊ．Ｓｍ）又称赤蕨,为乌毛蕨科苏铁蕨属单一野生蕨类,是孢子植物向裸子植物进化的一种植物。属珍稀濒危植物。我省镇宁...     

八雄并立惊雁山──叉叶苏铁现奇葩

在风光旖旎的雁山桂林植物园里,一株引种栽培的珍稀苏铁类植物——叉叶苏铁,最近同时开出了八枚雄劲的雄球花（小孢子叶球）,成为该园的一大植物奇观,令众多游客叹为观止。叉叶苏铁（Cycasmi-cholitzii）,为苏铁科苏铁肩多年常绿树种,因其羽状叶片上的羽片又二叉状分裂而得名。该种在我国仅星散分布于广西龙州。崇左、大新和云南弥勒等地130—175米的低海拔石灰岩季雨林下（越南、老挝、泰国也有）,是国家重点保护的珍稀濒危植物。这株“八雄并立”的叉叶苏铁,茎高52厘米,基部直径53厘米,系桂林植物园80年代中期从广西龙州引种的…     

中国植物园游客游览动机及满意度调查

植物园每年都吸引大量的游客,是向公众展示生物多样性和开展生物多样性教育的重要场所.了解游客参观植物园的动机以及游览后的满意度,对植物园的运营及科普功能的发挥至关重要.作者选择厦门园林植物园、中国科学院武汉植物园、北京市植物园、中国科学院昆明植物研究所植物园和中国科学院西双版纳热带植物园5个植物园为研究对象,通过向游览后...     

三角梅生物学特性及引种栽培

本文介绍厦门园林植物园收集保存的近30个三角梅品种的生物学特性、栽培管理和繁殖技术。     

三角梅生物学特性及引种栽培

本文介绍厦门园林植物园收集保存的近３０个三角梅品种的生物学特性、栽培管理和繁殖技术。     

福建厦门地区棕榈科植物资源及其园林应用

调查了厦门地区棕榈科植物资源状况及其绿化应用,并结合多年来对厦门市园林植物园棕榈植物保育中心内棕榈科植物的物候期观察,选出适合厦门地区推广应用的棕榈科植物104种,同时对厦门地区棕榈科植物应用的种类、数量、分布以及应用频度等进行统计分析。     

厦门植物园多肉植物资源及应用评价

本文概述厦门植物园多肉植物资源的种类和类型,描述其栽培特性,评价多肉植物的园林应用及经济价值的开发状况,为进一步开发利用提供依据。     

云南野生兜兰的引种栽培

1997～ 2 0 0 1年引种云南野生兜兰 1 3种 ,存苗 2万余株 ,在昆明园林植物园 (金殿 )兰圃栽培。具有引种成活率高、容易栽培、观赏价值高的优点 ,在养护管理实践中确立了一套栽培管理技术措施     

苏铁白化苗叶片细胞的超微结构

本文系苏铁白化苗研究系列报道之二。应用超薄切片和电镜观察技术对苏铁白化苗叶片细胞的超微结构观察,结果表明,苏铁白化苗叶片细胞的超微结构与绿苗的相比有明显不同,前者的细胞质含量稀少,未见有结构完整的叶绿体和线粒体,但见有呈支解、游离状的类似叶绿体片层的膜结构和内嵴几乎完全消失的退化线粒体存在;后者的细胞结构正常。     

Features of cyanobacterial-bacterial complexes of microsymbionts of plant syncyanoses

The morphology and ultrastructure of associative microsymbiont complexes (AMC) isolated from the ferns Azolla pinnata and Azolla sp. and the apogeotropic roots of the cycad Cycas revoluta were studied. The composition of the AMC obtained includes the cyanobionts (symbiotic cyanobacteria) and satellite bacteria (SB). It was found that two types of cyanobacteria that substantially differ in their morphological organization are likely present as cyanobionts in the coralloids of C. revoluta. The isolated cyanobiont strains exhibited the morphological traits and regularities of development typical of the genus Nostoc; they were characterized by the ability of their cells to divide in mutually perpendicular planes. When isolating AMC from different morphological zones of C. revoluta apogeotropic roots, SB growth was revealed only around the pieces corresponding to the coralloid apical zone. No AMC components were revealed around the segments of the basal growth zone. Pure cyanobiont cultures were obtained from the AMC of C. revoluta coralloids. The AMC isolated from the ferns A. pinnata and Azolla sp. are characterized by obligate mutual dependence of the partners (the cyanobiont and SB).     

苏铁nrDNA ITS区的序列多态性:不完全致同进化的证据

本研究对苏铁(Cycas revoluta) nrDNA ITS进行克隆测序, 并以cDNA ITS为参照, 比较分析获得的序列的碱基变异、GC含量、5.8S二级结构的稳定性和5.8S保守基序的有无以及系统发育关系。结果发现苏铁nrDNA ITS存在较高的基因组内多样性, 同时, 这些分化的nrDNA ITS拷贝中包含有假基因的存在, 而且假基因与功能拷贝之间已经形成了较大的遗传分化, 这暗示假基因起源有较长历史。苏铁核仁组织区不仅多达16个, 而且分布在13条染色体上, 这可能是其nrDNA ITS致同进化不完全的主要原因。     

Is Cycas revoluta (Cycadaceae) wind- or insect-pollinated?

Among the Cycadales (Cycadaceae and Zamiaceae), the Zamiaceae are known to be insect-pollinated. In contrast, the Cycadaceae are still considered wind-pollinated, although some doubt has been cast on several species, including Cycas revoluta. Using a large population of C. revoluta on Yonaguni Island (Okinawa, Japan), we performed exclusion experiments, documented insects from male and female cones, and analyzed the morphology of the apical part of the ovule to determine the pollination method of this species. Insect exclusion resulted in a notable reduction in seed set, except in a few individuals growing near male cones. The amount of airborne pollen was abundant within a 2-m radius of male cones but decreased markedly beyond this distance. Pollen grains of C. revoluta were found on the body of Carpophilus chalybeus (Nitidulidae, Coleoptera), one of a few species of insects collected from both male cones and female cones far from males. We conclude that C. revoluta relies on both wind (anemophily) and insect pollination (entomophily), although such anemophily is restricted to female trees growing within a 2-m radius of male trees. The nitidulids are not host specific to this cycad and primarily feed on plant tissue but serve as pollinators during pollen release. Cycas revoluta appears to be in an initial mode of animal pollination, as opposed to the host-specific insect pollination observed in most Zamiaceae.     

苏铁白化苗叶片形态与结构观察

本文对苏铁(Cycas revoluta)白化苗与绿色正常苗的形态特征及叶片显微结构进行比较观察。结果表明,两者之间存在许多显著且稳定的差异。     

Nitrogenase in free-living and symbiotic cyanobacteria: Immunoelectron microscopic localization

Abstract Nitrogenase (Fe-protein) was localized in the free-living cyanobacterium Anabaena cylindrica and in the cyanobionts of Cycas revoluta and Peltigera aphthosa , using colloidal gold as an immunocytochemical marker. The Fe-protein was found to be evenly distributed throughout the heterocyst cytoplasma in A. cylindrica and in both the cyanobionts, including multiple heterocysts of the C. revoluta cyanobiont. No label was observed in the vegetative cells of free-living A. cylindrica or of the cyanobionts, although the cyanobionts apparently live under microaerobic conditions.     

The lectin from leaves of Japanese cycad, Cycas revoluta Thunb. (gymnosperm) is a member of the jacalin-related family.

A novel lectin was isolated from leaves of the Japanese cycad, Cycas revoluta Thunb. (gymnosperm), and its characteristics including amino acid composition, molecular mass, carbohydrate binding specificity and partial amino acid sequences were examined. The inhibition analysis of hemagglutinating activity with various sugars showed that the lectin has a carbohydrate-binding specificity similar to those of mannose recognizing, jacalin-related lectins. Partial amino acid sequences of the lysylendopeptic peptides shows that the lectin might have a repeating structure and belong to the jacalin-related lectin family.     

福建苏铁调查研究初报

对福建苏铁经过三年多的调查、观察和研究 ,基本完成福建苏铁原产地的调查 ,认为福建原产两种苏铁 ,即苏铁与四川苏铁。本文还对福州树木园引种栽培的苏铁进行分类研究 ,有苏铁、四川苏铁、海南苏铁、攀枝花苏铁、广东苏铁、台东苏铁、元江苏铁、暹罗苏铁、石山苏铁、篦齿苏铁、越南苏铁、叉叶苏铁、多羽叉叶苏铁、多歧苏铁、刺叶苏铁等 ,另有三种形态特征比较特殊的苏铁也在本文进行了简要描述。     

福建苏铁调查研究初报

对福建苏铁经过三年多的调查、观察和研究,基本完成福建苏铁原产地的调查,认为福建原产两种苏铁,即苏铁与四川苏铁。本文还对福州树木园引种栽培的苏铁进行分类研究,有苏铁、四川苏铁、海南苏铁、攀枝花苏铁、广东苏铁、台东苏铁、元江苏铁、暹罗苏铁、石山苏铁、篦齿苏铁、越南苏铁、叉叶苏铁、多羽叉叶苏铁、多歧苏铁、刺叶苏铁等,另有三种形态特征比较特殊的苏铁也在本文进行了简要描述。     

Heterotrophic metabolism and regulation of uptake hydrogenase activity in symbiotic cyanobacteria

The H₂ uptake activity of three cyanobionts isolated fromCycas revoluta, C. circinalis andazolla filiculoides was shown to be related primarily to the growth rate and independent of the main mode of carbon nutrition. Significant H₂ uptake was found in the coralloid roots ofCycas revoluta andZamia furfuracea (3 and 22 times higher than the respective C₂H₂ reduction activities). The results attained allow us to conclude that in cyanobacteria, in contrast to most nitrogen-fixing heterotrophs, uptake hydrogenase activity is not repressed by carbon substrates and that cyanobacteria in association seem to be endowed with sufficient H₂ uptake capacity to recover all of the H₂ released during the process of N₂-fixation.