Responses of plasma membrane transport systems of Casuarina equisetifolia to acid rain stress and regulation

酸雨是全球性大气污染环境问题之一,由于酸雨对生态系统影响的复杂性，酸雨污染的危害及机制还远未得到充分认识。木麻黄防护林是东南沿海最重要的防风固沙林，在改善当地生态环境和促进经济发展上发挥了难以取代的作用。通过水双相分配法提取高纯度质膜，首次从木麻黄幼苗质膜转运系统的活性响应角度研究酸雨胁迫以及酸雨和NaCl双重胁迫对木麻黄的危害及调控机制，探索植物对酸雨及盐胁迫的信息感受与传递机制，并分析酸雨胁迫对木麻黄－土壤体系的有机溶质和微量元素代谢影响特点。主要研究结果如下：酸雨对盆栽普通木麻黄（Casuarinaequisetifolia）幼苗的生长有影响。在系列酸度（pH4.5～2.5）酸雨处理三个...Acid rain is one of serious environmental problems in the world. However, its dangers and pollution mechanisms haven’t been completely understood yet, because of the complexity of the influences of acid rain on eco-system. Casuarina shelter forests are very important to breaking wind and fixing sand in China’s southeastern seashore. They play a remarkable role in improving the ecological environme...学位：理学博士院系专业：生命科学学院生物学系_植物学学号：B20012600

Toxicological response of wetland organisms to environmental pollution in Quanzhou Bay, Fujian province, China ——Aegiceras corniculatum, Eichhornia crassipes, Phascolosoma esculenta

内容摘要 本文以泉州湾湿地生物桐花树（Aegicerascorniculatum）、凤眼莲（Eichhorniacrassipes）、可口革囊星虫(Phscolosomaesculenta)为研究对象，从环境污染物在湿地系统的分布特点、赋存形态以及生理生态和分子毒理学水平探讨泉州湾湿地生物对环境污染物的毒理学响应特性。得出的主要结论是： 1泉州湾常见植物的生境土壤受中度以上的Zn、Pb污染，且Zn与Pb污染呈显著正相关关系。在Cu、Zn、Pb各重金属形态中，交换态和碳酸盐结合态仅占较小比例，而还原态占较大比例，Cu和Zn的氧化态含量较高，而Pb的氧化态含量较低。Cu、Zn、Pb在桐花树群落...Abstract The toxicological response characteristic of the wetland organisms including Aegicerascorniculatum, Eichhornia crassipes, Phascolosomaesculenta in Quanzhou Bay to environmental pollution were researched based on pollution distribution and their chemical partition and physiological and ecological and molecular toxicological level. The main results are as follows: 1 The sediment soils i...学位：博士后院系专业：海洋与环境学院环境科学与工程系_环境科学学号：BH1700005

Analysis of the seed plant flora in the nature forests of Niumulin nature reserve zone, Fujian Province.

对福建省牛姆林6个天然林样地的植物区系组成统计分析结果表明,牛姆林天然林的植物种类组成丰富,在2900m~2范围有248种高等植物分属82科153属,其中蕨类植物11科14属16种,裸子植物3科3属3种,被子植物71科136属229种,种子植物属的系数为61.69;区系地理成分较为复杂,属的地理成分以热带分布型为主,63.36％的热带地理成分及32.82％的温带地理成分显示出牛姆林地处南亚热带北缘的地理特点。The study on the flora of six nature forests shows that the composition of plant species is abundant in the nature forests of Niumulin nature reserve zone, there are 248 species of high plants in 2900m2 area, which belong to 153 genera in 82 families. Among them, 16 species of 14 genera in 11 families are pteridophte, and 3 species of 3 genera in 3 families are Gymnosperm, and 229 species of 136 genera in 71 families are Angiosperm. The coefficient of genus is 61.69. On the distribution pattern of gunus, the tropic distribution pattern is the main floristic element. 63.36% of the genera in the nature forests belongs to tropic, and 32.82% of the genera belongs to temperate, which shows the geographical characteristics of Niumulin nature reserve zone that lies in northern edge of South Subtropical Area.泉州师范学院科研基金(2001-Ⅱ-27

木麻黄幼苗小枝质膜离子泵活性对酸雨的响应

对模拟p H4. 5～2. 5 酸雨胁迫3 个月后木麻黄幼苗小枝质膜离子泵活性测定结果表明,木麻黄幼苗嫩枝质膜H+ 2 ATPase 和Ca2 + 2ATPase 对酸雨非常敏感,常随酸雨强度的加大其活性受愈来愈强的抑制. p H4. 5～2. 5 酸雨处理使质膜 H + 2ATPase 活性被抑制76. 64 %～85. 88 % ,而Ca2 + 2ATPase 活性仅为对照的14. 12 %～4. 7 %. 在p H3. 0 酸雨处理组,质 膜H+ 2ATPase 和Ca2 + 2ATPase 活性均出现反弹升高. 酸雨对质膜H + 2ATPase 和Ca2 + 2ATPase 活性所产生的相似作用, 体现出质膜H+ 2ATPase 和Ca2 + 2ATPase 对酸雨胁迫信号具有某种程度上相同的活性响应调节机制

福建省牛姆林自然保护区常绿针阔叶混交林主要种群空间格局研究

基于方差/均值比率法、x~2检验、集聚指数测度与检验、样方方差法等格局研究方法,对福建省牛姆林自然保护区常绿针阔叶混交林马尾松+拉氏栲(Pinus massonnina+Castanopsis lamontii)群落的7个主要乔木种群空间分布格局类型、格局规模与强度等特征研究结果显示,马尾松、拉氏栲、华南桂、木荷4个种群的格局属于随机分布格局;米椎、榄叶石栎和绒毛润楠3个种群的格局属于集聚分布格局,但其集聚强度均不高,依次为米椎>榄叶石栎>绒毛润楠,这3个集聚种群有可能成为该区未来群落的建群种

重金属污染对红树植物影响的研究综述与展望

红树林是热带、亚热带潮间带的优势植物群落,对环境重金属污染具有较高的耐受能力。该文从重金属的分布特点及红树植物生长与形态结构以及生理代谢等方面简要综述重金属污染对红树植物的影响研究,并在分子研究水平对该方向的研究提出展望。福建省青年科技人才创新项目(2004J053);; 泉州市科技局项目(2003Z11

重金属污染对植物光合作用的影响

简要概述重金属污染对植物叶片的叶绿体超微结构、叶绿素含量、类囊体膜PSⅠ、PSⅡ电子传递活性、希尔反应活力以及光合产物输配等植物光合作用特征的影响。泉州师范学院重点学科(KX0609)项目资

The physiological and ecological responses of the seed germination of Casuarina equisetifolia to chromic stress

试验研究不同浓度CrCl3 胁迫对木麻黄种子萌发初期一些生理生态特征的影响结果表明 ,随CrCl3 处理浓度的加大而木麻黄种子萌发率逐渐降低 ,幼苗株高、根长、鲜物质量和干物质量均逐渐降低 ;脯氨酸、超氧负离子含量先升后降 ,蛋白质含量逐渐升高 ;超氧化物歧化酶活性 (SOD)先升后降 ,过氧化物酶活性 (POD)和过氧化氢酶活性 (CAT)则逐渐增加 ,SOD、POD、CAT活性可作为毒物的敏感指示者。环境胁迫条件下植物体形态特征的响应常滞后于生理特征。Effects of CrCl_3 stress with different concentrations on some earlier physiological and ecological characteristics of seed germination of Casuarina equisetifolia were studied. The results show that the seed germination percentage,the plant height, root length, fresh biomass, and dry biomass of seedlings all gradually decrease with the treatments of increased CrCl_3 concentrations. At the meantime, the contents of proline and superoxide anion (O A-·D_2) increase firstly and decrease afterwards, and the content of protein gradually increases. Furthermore, the activity of the protective enzyme SOD increases firstly and decreases afterwards, and the activities of POD and CAT both gradually increase. The activities of SOD,POD,CAT can act as sensitive designators to poison, and the morphologic responses of plant usually lag behind the physiological responses when it is under the environment stress.福建省自然科学基金重点项目 (D0 12 0 0 0 1);; 泉州师范学院科研基金项目 (2 0 0 2LI0 4)资

环境污染物对底栖动物的影响研究概述

底栖动物是水生态系统的重要组成类群。本文从底栖动物群落结构与物种多样性、环境污染物的分布特点、个体生活行为、形态解剖结构、致畸性、酶系统代谢等方面概述环境污染物对底栖动物的影响研究。福建省青年科技人才创新项目(2004J053);; 泉州市科技局项目(2003Z11

Effect of La~(2+) on the Growth of Allium sativum L.andCadmium Accumulation under Cd Stress

采用土培实验研究了镧(La2+)对镉(Cd)胁迫下大蒜幼苗生长及Cd积累的影响。结果表明:低浓度Cd(<5 mg.kg-1)对大蒜生长有微弱的促进作用而高浓度Cd对其有明显抑制作用。外施系列浓度La2+对高浓度Cd胁迫下大蒜幼苗生长具有明显的缓解效应,单株鲜重、干重、根长及地上部分高度均具有明显或不同程度的增加。测定结果表明,Cd主要积累在大蒜根部而向地上部分转运的较少,外施系列浓度La2+对高浓度Cd胁迫下大蒜幼苗根系对Cd积累具有显著的抑制效应,同时也抑制Cd向地上部分转运。从外施La2+对高浓度Cd胁迫下大蒜幼苗生长及大蒜对Cd积累情况来看,La2+的适宜缓解效应浓度是在Cd浓度为20 mg.kg-1时,La2+浓度为10~15 mg.kg-1;在Cd浓度为40 mg.kg-1,La2+浓度为5 mg.kg-1。The effects of La2+ on the growth of Allium sativum L.and Cadmium(Cd) accumulation under Cd stress were studied in the present paper by soil cultivation experiments.The results showed that the seedlings growth of A.sativum L.could be promoted a little under low concentration of Cd(<5mg·kg-1),while the seedlings growth could be obviously inhibited under high concentration of Cd.When La2+(concentration range from 5 to 20mg·kg-1) was exerted on A.sativum L.seedlings under high concentration Cd stress one time,the growth of seedlings was obviously reconditioned,Their average fresh or dry weight and the average length of roots,overground height significantly increased to some certain degree.Assay results also showed the roots of A.sativum L.absorbed large amounts of Cd,the Cd accumulated mainly in the roots and small amounts of Cd were translocated to the leaves.Accumulation of Cd of seedlings roots and translocation of Cd to overground part were obviously inhibited when La2+ was exerted on A.sativum L.seedlings.According to the growth of A.sativum L.and Cd accumulation of seedlings under high concentration Cd stress when La2+ was exerted on seedlings,valid concentration of La2+ was respectively 10～15mg·kg-1 or 5mg·kg-1 when Cd stress concentration was 20 or 40mg·kg-1.安徽省教育厅自然基金项目(KJ2007B021);; 阜阳师范学院院级课题项目(2007LQ04