水产禁用药物孔雀石绿的危害与对策分析

三苯甲烷类有机物孔雀石绿具有多方面的用途，文章首先简要介绍了孔雀石绿的化学性质、抑菌、抗真菌以及杀虫等强大功效，然后展开论述了孔雀石绿由于其高残留、高毒性以及致畸、致癌、致突变的毒副作用，而对水产养殖动物产生的剧毒、蓄积毒性、广泛组织毒副作用，以及对环境广泛而持久的危害，并且通过食物链对哺乳动物特别是人类自身造成致癌性、遗传毒性以及慢性毒副作用．然后介绍了孔雀石绿在水产上的个别违规使用现象，并进行了原因浅析．最后就如何因对孔雀石绿问题，从政策、宣传教育、科研等不同层面进行了对策分析．     

稻纵卷叶螟迁飞现象的观察

稻纵卷叶螟ＣｎａｇｈａｌｏｃｒｏｃｉｓｍｅｄｉｎａｌｉｓＧｕｅｎｅｅ自７０年代以来上升为海南省水稻三大害虫之一．海南省澄迈县一年发生９代：第２、４、６、９代为本地虫源本地繁殖代；第５、７代为大部分外地虫源迁入代；第３、８代为本地虫源大部分迁出代．广东省阳春县一年发生７代：第１、４、６代为本地虫源，本地繁殖代；第２、５代为大部分外地虫源迁入代；第３、７代为本地虫源大部分迁出代．每当水稻正处在分蘖期迁入的世代为害较为严重．往往引起突发性猖獗为害；而迁出代则意外地为害轻微．     

草莓雄配子体发育研究

在北方地区，草莓花芽冬前完成形态分化，从下一年开始雄性器官的分化发育，分化时期为４月下旬至５月下旬，共约２５ｄ。雄性器官的发育和成熟早于雌性器官，花药４室，分泌型绒毡层，小孢子发生属同时型，呈四面体型排列，花粉粒为３—细胞型。     

用水螅细胞重聚技术检测发育毒性的研究

应用水螅细胞重聚技术检测秋水仙碱和乙醇对动物产生的发育毒性和致畸危害,并且探讨这种检测技术应用的可行性     

大袋蛾雌成虫内部生殖系统的形态学和组织学

描述了大袋蛾（ＣｌａｎｉａｖａｒｉｅｇａｔａＳｎｅｌｌｅｎ）雌成虫内部生殖系统的形态学和组织学。大袋蛾雌成虫内部生殖器官与其它较高等的鳞翅目昆虫相比明显不同：交配囊极度退化，前庭中出现两个瓣膜。试验表明交尾后雌虫体内无精包，而在雌虫受精囊中发现精子束。这说明精子束被直接传输到受精囊中。大袋蛾是鳞翅目中发现的首例．交尾时不产生精包而直接授精的虫种。     

Relationship between toxicity and molecular volume of dioxins,organic phosphorous compounds and <Emphasis Type="Italic">n</Emphasis>-alkanols

The molecular volumes of dioxins, organic phosphorous compounds and n-alkanols were computed at the B3LYP/6-311G** level, and were then correlated with their toxicity. It was surprisingly found that there exists the so-called “critical volume of toxicity“ (CVT) in each series of compound of the present study, i.e. the toxicity increases with increase of the molecular volume when less than CVT, while decreasing with increase of the molecular volume when larger than CVT. The CVT for the three series of compounds is quite similar, ranging 0.309----0.320 nm^3. It was proposed that the ordinary linear solvation energy relationship (LSER) should be modified with respect to the new findings, and accordingly the anaesthetic potency of partial fluorinated n-alkanols was predicted.     

4%嘧肽霉素水剂的毒性和防效

对4%嘧肽霉素水剂进行了毒性试验和防效测定。结果表明:4%嘧肽霉素水剂的大鼠急性经口毒性半致死剂量LD50>4640mg/kg,急性经皮毒性LD50>2150mg/kg,对皮肤和眼均无刺激性,属于低毒生物农药。该药剂对植物病毒病有较好的防治效果,在第三次施药后10天观察,各施用浓度对番茄、辣椒和烟草的病毒病的防效为60%～80%,显著高于对照药剂病毒A和植病灵。     

红树植物桐花树大小孢子发生及雌雄配子体发育的观察

用常规石蜡切片法和显微镜观察，对桐花树的胚胎发育早期进行研究，得到以下结果：1）花药由4个花粉囊组成，药壁包括表皮、药室内壁、中层及绒毡层，绒毡层为腺质绒毡层；2）小孢子母细胞减数分裂为同时型，四分体排列方式为四面体型；3）成熟花粉二细胞，有4个萌发孔；4）特立中央胎座，薄珠心，大孢子母细胞减数分裂形成T形排列的4个大孢子，合点端的大孢子具功能，成熟胚囊为七胞八核结构，胚囊发育类型为蓼型；5）花药壁中含单宁细胞团，发育过程中子房内的胎座出现类似于盐腺的结构．     

野古草(Arundinella hirta) 对水淹逆境的生殖响应

分析了嘉陵江边不同强度水淹后的1年生野古草个体的有性生殖和无性生殖数量特征，结果表明：野古草有性生殖植株的单株种子质量、粒数和生殖分配等随水淹强度增大而逐渐降低，高强度水淹后野古草没有进行有性生殖．在一定水淹范围内，表征野古草无性生殖的单株质量、分枝数随水淹强度的增大而呈增大的趋势，说明野古草无性生殖随水淹强度的增加呈增强的趋势．在周期性的自然水淹下，无性生殖是野古草适应自然的生殖方式．     

Parentage determination of an isolated Yangtze finless porpoise population Neophocaena phocaenoides asiaeorientalis in the Yangtze Tian-e-Zhou Baiji National Natural Reserve based on molecular data

Reproductive behaviors are poorly known for the Yangtze finless porpoise Neophocaena phocaenoides asiaeorientalis. In this study, the parentage of an isolated Yangtze finless porpoise population inhabiting the Yangtze Tian-e-Zhou Baiji National Natural Reserve is determined by analysis of microsatellite loci and mitochondrial DNA (mtDNA) control region sequences, and the porpoise's reproductive behaviors are studied. Overall 4 full parentage assignments and additional 3 single parentage assignments were determined for the population of 23 individuals. The analysis shows that their estimated reproductive cycle is shorter than that reported previously and there probably exists an overlapping between gestation and lactation period. The study also shows that the female does not show fidelity to a particular male for breeding and vice versa, the oldest males did not monopolize mating and the dominance rank could not be so strict for the porpoise society. Moreover, the porpoise's mating pattern and relatedness among candidate parents are discussed here. These results provide important information for making guidelines of management and conservation for this protected population.