Cloning and expression of putative ethylene receptor genes in soybean plant

Ethylene plays important roles in plant growth, development, and stress responses, and ethylene receptors have been identified and studied extensively in various plant species. Here we report the cloning of four ethylene receptor genes from soybean, i.e. GmETR1, GmERS1, GmETR2 and GmEIN4. Construction of the phylogenic tree showed that GmETR1 and GmERS1 belong to subfamily I whereas GmETR2 and GmEIN4 belong to subfamily II. The four ethylene receptor genes showed different tissue-specific expression patterns in roots, stems, leaves, cotyledons, flowers, pods and seeds of soybean. These genes were differentially regulated by various abiotic stresses and plant hormones. The possible roles of the four genes in soybean plant were also discussed.     

Relationship between plant species diversity and patch characteristics in a marsh in the Sangjiang Plain,China—Using Yaluhe farm as an example

Based on Quick Bird satellite image data, the present study examined small-scale herbaceous community patches in the marsh of the Sanjiang Plain and measured patch characteristics such as the area, perimeter and shape by GPS. The coenological characteristics of the patches were investigated using quadrat method, and the vascular plant species were recorded using transect method. A total of 219 plant species were recorded, which represents 12.2% of the vascular flora in Heilongjiang Province. Our results showed that species number S correlated with patch area and perimeter; richness index (R) correlated with patch perimeter; Simpson index (D) correlated with patch area and perimeter/area; Shannon-Wiener index (H′) correlated with patch area, perimeter and perimeter/area; Evenness index (Jsw) correlated with perimeter/area. Both S and R have significant difference between different size of patches. Plant diversity in the small-scale herbaceous communities tended to increase with the patch area and perimeter. We concluded that edge effects and the habitat heterogeneity of the patches are important in determining the number of species. The relative smoothness of the patch edges also affects the plant diversity of the patches. The richness of plant species in the marsh in the Sanjiang Plain is highly sensitive to the small-scale patches, which continues to play an important role in preserving plant diversity in the local area.     

城市污水处理厂恶臭气体及控制技术的研究

针对城市污水处理厂恶臭气体所造成的环境污染、居民抱怨以及对职工健康造成损害等一系列问题，分析了城市污水处理厂恶臭气体的形成机理及恶臭气体与处理工艺过程的紧密相关性，并在此基础上提出了全过程控制的理念；同时为将国内停留在实验室研究阶段提升到工程应用程度，文中辅以实例对现场试验研究进行了概述。     

几种植物对生活污水的处理效果研究

选取蛇泡草，红辣蓼，鹅不食草和田边菊作为人工湿地的栽培物，并对它们处理污水的效果进行研究，结果表明，不同的植物对生活污水的处理效果有所不同，红辣蓼对NH^ 4-N的去除率最高，24－48h之间的平均值为24．5％，蛇泡草对TP的去除率最高，24－48h之间的平均值为17．0％，所有受试植物对污水的处理效果均在40－48h之间达到顶峰。     

植物生理学课程体系和教学内容的改革实践

根据植物生理学的学科发展趋势和跨世纪人才培养的要求 ,以教学内容和课程体系改革为核心 ,把分子生物学的新概念、新理论和新的思想方法整合到传统教学体系中 ,增强其生机和活力 .逐渐把验证性实验转变为探索式实验 ,培养学生综合应用能力和创新精神     

植物对土壤水分条件的适应性反应研究进展

植物对土壤水分条件的适应性反应既有微观层次上的生理和生化反应,也有器官、单株水平上的形态响应.水分条件对植物生理生化过程的影响,最终将通过其形态的变化直观地表现出来.由于植物对水分条件变化的反应是长时效、非线性的,它的实现过程具有整体复杂性.所以,综合性整体研究应成为今后节水农业研究的重要方向.     

查尔酮合酶基因的克隆及双元载体的构建

以中国水仙为材料，利用RT-PCR方法克隆查尔酮合酶基因(CHS)的cDNA，核酸序列分析表明，该基因的编码区长1167bp，编码389个氨基酸，通过进一步的中间克隆，将CHS连上CaMV35s启动子和Tnos终止子。进一步将重组片段插入植物表达载体pCAMBIA1301,PCR及测序结果都证明植物双元表达载体p1301BΩＣ构建获得成功。为进一步在植物中表达CHS奠定了基础。     

火电厂水力冲灰系统的防垢与除垢技术

灰管结垢是火电厂普遍存在的问题。在分析灰管结垢机理的基础上，从防垢、除垢机理出发，介绍了几种常用的防垢、除垢技术。     

植物细胞程序性死亡的研究进展

细胞程序性死亡是在植物体的一定发育阶段普遍发生的受特定基因调控的自然的细胞死亡过程.本文就植物PCD的一般特征、普遍性及其机理等方面的研究进展进行综述.     

海南岛周边海域岛屿药用植物资源与开发利用

通过对海南岛周边海域岛屿药用植物进行采集调查、鉴定统计，共计有478种。分别隶属于123科356属。并对药用植物资源的开发和利用提出建议，为研究和合理利用海南岛周边海域岛屿药用植物资源提供基础材料。