Comparisons on Leaf Traits Between the Exotic Mangrove Sonneratia apetala and the Native Mangrove Kandelia obovata in Latitudinal Gradient

秋茄是我国的广布种，是我国天然分布最北的红树植物，也是红树林的主要造林树种之一。无瓣海桑是1985年从孟加拉国引入中国的，由于生长快速，目前已成为红树林恢复造林的首选树种，在中国东南沿海各省广泛种植。通过多年的造林，无瓣海桑不断北移成为纬度分布范围仅次于秋茄的树种。基于对其北移潜力的不确定性和潜在入侵力的担忧，本研究在我国东南沿海选择海南三亚、海口东寨港、广东湛江雷州、广东深圳、福建漳浦、福建厦门、浙江温州7个不同纬度样点，对人工种植的无瓣海桑和秋茄的叶片性状进行比较研究。通过比较不同纬度下两种红树植物叶片性状的差异，探讨外来红树无瓣海桑北移引种的可能性，并分析其入侵潜力。结果表明： 1.各...Kandelia obovata, a widely distributed mangrove species in China, is the northern-most naturally distributed species and has been commonly used for mangrove reforestation. Sonneratia apetala, another popular afforestation species, was first introduced to China from Bangladesh in 1985 and has been planted throughout the southeast coastal provinces. Since then, S. apetala has been used extensively i...学位：理学硕士院系专业：生命科学学院生物学系_生态学学号：2172009115204

Effects of soil water condition on Ficus microcarpa growth and physiological characteristics

以3年生人参榕(fICuS MICrOCArPA)为试材,采用盆栽调控水分的方法,研究5种不同的水分处理(基质最大含水量的90%~100%,70%~80%,50%~60%,30%~40%和10%~20%)对人参榕生长和生理的影响,为栽培生产提供理论依据。结果表明:随着浇水量的减少,人参榕的株高、冠幅、块根增量均显著下降(P<0.05);人参榕叶片的超氧化物歧化酶(SOd)、过氧化物酶(POd)活性显著增高(P<0.05),细胞膜相对透性显著增强,脯氨酸和丙二醛(MdA)含量也显著增加;叶片净光合速率(Pn)和蒸腾速率(Tr)呈随浇水量的减少而显著降低;但叶片水分利用效率(WuE)呈显著增加趋势;各处理的叶片初始荧光(fO)和最大光量子效率(fV/fM)差异不显著。在各处理中,70%~80%的最大基质含水量的处理,其人参榕叶片的细胞膜相对透性最低,保护酶活性最弱,脯氨酸和丙二醛含量最低,净光合速率高,从而导致了人参榕具有生长最快、株高、冠幅和最大块根直径增量最大的特点。可见,70%~80%的最大基质含水量为是人参榕种植效果最好的水分管理模式。A greenhouse pot experiment was conducted to study the effects of different soil water conditions on the growth and physiological characteristics of three years old Ficus microcarpa seedlings,aimed to provide an optimum water management mode for the cultivation of this horticultural species.Five treatments were installed,i.e.,90%-100%,70%-80%,50%-60%,30%-40%,and 10%-20% of maximum soil water content.With the decrease of the water content,the seedling height,crown diameter,and root tuber biomass decreased significantly,leaf superoxide dismutase(SOD) and peroxidase(POD) activities,membrane permeability,and proline and malondialdehyde(MDA) contents had significant increase,leaf photosynthetic rate(Pn) and transpiration rate(Tr) decreased significantly,and leaf water use efficiency(WUE) had a significant increasing trend in the treatments with lower soil water content.No significant differences were observed in the minimum fluorescence yield in light-adapted state(Fo) and the quantum yield of PSII photochemistry in dark-adapted state(Fv/Fm) among the five treatments.In treatment 70%-80% of maximum soil water content,the leaf membrane permeability,SOD and POD activities,and proline and MDA contents were the lowest while the Pn was highest,resulting in the quickest seedling growth and the largest increments of plant height,crown diameter,and root tuber biomass,suggesting that this treatment could be the best water management mode for the cultivation of F.microcarpa.福建省科技重大专项(2007SZ08010053);福建省科技创新平台建设项目(2008N2003)资

Synergistic effects of low temperature in winter and ebb tide at night on Sonneratia apetala seedlings growth and key eco-physiological traits

利用人工控制手段,模拟冬季低温和夜间低潮对无瓣海桑幼苗的影响,分析气温-水温协同作用下无瓣海桑幼苗的低温适应机制.结果表明:低温显著抑制了无瓣海桑幼苗株高和基径的增长,而提高水温5℃对其的缓解作用分别达41.2%和44.6%;低气温(15℃)显著降低了叶片的最大光化学效率(fV/fM)值,进而影响叶片的光合能力,而提高水温未能显著缓解其损伤;低气温时,提高水温能促进幼苗叶片脯氨酸的积累,增加可溶性糖含量,缓解低温对叶片的伤害.极端低温发生时,夜间高潮对幼苗起到较好的保温作用,缓解了低温对幼苗生长和叶片的生理伤害,提高了无瓣海桑幼苗的成活率.By setting up a set of simulated tidal systems with different air-and water temperature and tidal flood conditions,this paper studied the synergistic effects of low temperature in winter and ebb tide at night on the growth and key eco-physiological traits of Sonneratia apetala seedlings.Low air temperature depressed the seedlings growth,but the reduction in the seedling height and basal stem diameter was compensated 41.2% and 44.6%,respectively by a 5 ℃ increase of water temperature.Low air temperature(15 ℃) reduced the leaf Fv/Fm significantly,indicating a dramatic reduction in the leaf photosynthetic capacity,whereas the flooded tide with higher water temperature could not compensate this damage.The flooded tide with high air temperature increased the proline and soluble sugar contents in mature leaves,which could protect the mature leaves from cold damage.When extreme cold events occurred,the flooded tide at night worked as a heat storage medium,which alleviated the cold damage on the seedlings growth and leaf physiological traits,and promoted the survival rate of S.apetala seedlings.国家自然科学基金项目(30700092);福建省自然科学基金项目(2009J05085)资

Photosynthetic and Shade-tolerance Characteristics of Eight Ornamental Plants

通过测定漳州地区8种园林植物叶片的形态特征、光合作用和光响应曲线,并对测定结果进行方差分析和相关分析,比较分析其耐荫程度。结果表明:试验的8个品种除黄金榕外,其它品种对弱光利用能力较强,具有较强的弱光适应能力;三角梅、锦绣杜鹃、红背桂等植物的耐荫性较强,在园林中可配置在比较郁蔽的林下;黄金榕和悬铃花是喜光植物,能适应较强的光辐射,耐荫能力相对较差,可以配置在林缘或疏林草地中,光照越足,黄金榕的叶色、悬铃花的花都会越鲜艳;花叶假连翘既有一定的耐荫能力,又能适应较强的阳光辐射,对光适应的生态幅度较宽,在园林配置中可根据需要进行布置。桂花和红背桂能更好的利用土壤水分,可配置在相对较干旱的地方。净光合速率Pn与其主要影响因子气孔导度gS、胞间CO2浓度CI、蒸腾速率Tr、叶温下蒸汽压亏缺VPdl、光合有效辐射PAr的相关性分析表明,种类不同,其影响因子也不一样,8种园林植物的Pn与CI呈极显著负相关。此研究为园林中植物的配置提供了一定的理论依据。The morphological characteristics of plant leaves,photosynthesis and light response were measured,the variance and correlation of the results were analyzed,and the extent of their shade-tolerance were compared for eight ornamental plants in Zhangzhou.The results showed that except for Ficus microcarpa cv.GoldenLeaves,the other varieties had a strong ability to use and adapt to low light.Bougainvillea spectabilis,Rhododendron pulchrum and Excoecaria cochinchinensis had a strong shade-tolerance,so they could be used under buzzed forest cover.Ficus microcarpa cv.GoldenLeaves,and Malvaiscus arboreus var.penduliflorus were photophilous plants,could adapt to a strong light radiation and had relatively poor shade-tolerant capability,so they could be used in forest edges or grasslands.The more light,the more colorful of the leaves of Ficus microcarpa cv.GoldenLeaves and Malvaiscus arboreus var.penduliflorus.Duranta repens'Variegata'had a wide light ecological suitabilty both in shade-tolerant and strong solar radiation,so they could be used in the ornamental layout without light restriction.Osmanthus fragrans and Excoecaria cochinchinensis could make better use of soil moisture,so they could be used in relatively dry areas.Correlation analysis of Pn and other main influencing factors Gs,Ci,Tr,VpdL,PAR showed that: different varieties had different impact factors.Pn and Ci of the eight ornamental plants were significantly related.This study provided a theoretical basis for the configuration of ornamental plants.福建省教委科研基金资助项目(No.JB08185);福建省科技创新平台建设项目(No.2008N2003

固-液搅拌槽内桨型对颗粒悬浮特性影响的实验和模拟研究

以水为液相,玻璃珠为固相,在固-液搅拌槽内比较了传统径向流Rushton桨、轴向流下推式45°六斜叶桨以及新型半折叶搅拌桨的功耗、泵送能力和对固体颗粒的悬浮效果。并应用CFD(Computational fluid dynamics)方法研究了不同搅拌桨操作下颗粒的轴向速度分布。结果表明:在相同转速下,Rushton桨的功耗最大,新型半折叶桨与下推式45°六斜叶桨的功耗接近;新型半折叶桨的流量准数最大,泵送能力最强;在固-液体系中,新型半折叶桨与下推式45°六斜叶桨的流型类似,但3种桨中新型半折叶桨对固体颗粒的悬浮效果最好

固-液搅拌槽内桨型对颗粒悬浮特性影响的实验和模拟研究

以水为液相,玻璃珠为固相,在固-液搅拌槽内比较了传统径向流Rushton桨、轴向流下推式45°六斜叶桨以及新型半折叶搅拌桨的功耗、泵送能力和对固体颗粒的悬浮效果。并应用CFD(Computational fluid dynamics)方法研究了不同搅拌桨操作下颗粒的轴向速度分布。结果表明:在相同转速下,Rushton桨的功耗最大,新型半折叶桨与下推式45°六斜叶桨的功耗接近;新型半折叶桨的流量准数最大,泵送能力最强;在固-液体系中,新型半折叶桨与下推式45°六斜叶桨的流型类似,但3种桨中新型半折叶桨对固体颗粒的悬浮效果最好

固液搅拌槽内桨型对颗粒悬浮特性影响的实验和模拟研究

以水为液相,玻璃珠为固相,在固-液搅拌槽内比较了传统径向流Rushton桨、轴向流下推式45°六斜叶桨以及新型半折叶搅拌桨的功耗、泵送能力和对固体颗粒的悬浮效果。并应用CFD( Computational fluid dynamics)方法研究了不同搅拌桨操作下颗粒的轴向速度分布。结果表明:在相同转速下,Rushton桨的功耗最大,新型半折叶桨与下推式45°六斜叶桨的功耗接近;新型半折叶桨的流量准数最大,泵送能力最强;在固-液体系中,新型半折叶桨与下推式45°六斜叶桨的流型类似,但3种桨中新型半折叶桨对固体颗粒的悬浮效果最好

高效液相色谱串联质谱法与化学发光法定量测定 女性血清总睾酮的比较分析

【目的】通过比较高效液相色谱串联质谱法（LC-MS/MS）与化学发光法（CLIA）对多囊卵巢综合征 （PCOS）患者及健康对照女性血清总睾酮（TT）的定量检测，探索LC-MS/MS 诊断生化高雄激素血症及PCOS 的 临床意义。【方法】收集PCOS 患者325 例、正常对照者244 例，比较病例组与对照组及各亚组间LC-MS/MS 和 CLIA 测定的血清总睾酮。【结果】LC-MS/MS 法可明显区分PCOS 患者与正常女性的TT 水平。LC-MS/MS 法TT 及相应游离睾酮指数（FAI）在多毛组明显高于非多毛组，而CLIA 法TT 及相应FAI 在两组间差异不显著。LCMS/ MS 法TT 与多毛评分（mFG）呈正等级相关，而CLIA 法TT 与mFG 则无线性等级相关。Bland-Altman 法和 Deming 回归分析均提示LC-MS/MS 法和CLIA 法检测女性血清TT 的一致性欠佳。LC-MS/MS 法TT 诊断高雄激 素血症截断值为≥ 1.85 nmol/L。CLIA 法TT 诊断高雄激素血症截断值为≥ 2.39 nmol/L。LC-MS/MS 高雄组与 CLIA高雄组间身体测量参数及实验室检查均有较多差异（P < 0.05）。ROC曲线亦提示LC-MS/MS法TT测定对 PCOS 有好的诊断价值。【结论】LC-MS/MS 法测定血清TT较CLIA 灵敏性高、准确度好，对女性生化高雄激素血 症与PCOS的诊断效能高