0.05g·L-1ABA处理对水蔗草兼性无融合生殖的影响

在水蔗草花序发育时期对花序喷施0.05 g·L-1ABA后,对水蔗草的花粉育性、结实率和无融合生殖的频率进行研究.结果表明用0.05 g·L-1ABA处理,花粉育性、结实率和无融合生殖的频率与对照均没有显著性差异.     

安徽钝舟形藻的初步研究

报道了采自安徽省的钝舟形藻原变种（Ｎａｖｉｃｕｌａ ｍｕｔｉｃａ Ｋｕｔｚ．ｖａｒ．ｍｕｔｉｃａ）及其７变种。其中,有我国分布新记录的１变种（钝舟形藻热带变种Ｎ．ｍｕｔｉｃａ ｖａｒ．ｔｒｏｐｉｃａ Ｈｕｓｔ．）,安徽省新记录的５变种。     

有机硅改性丙烯酸酯涂层的微/纳凸柱状织构化及其防污性能

经过"硅片模板-PDMS模板-目标涂层"的制备过程,实现了具有规则微/纳凸柱状织构表面的有机硅改性丙烯酸酯涂层的制备.利用傅里叶红外光谱仪(FTIR)、场发射扫描电子显微镜(SEM)、原子力显微镜(AFM)和接触角仪系统表征了所制备涂层的物理化学性能,并以绿藻门的丝藻和硅藻门的舟形藻作为研究对象,考察了涂层的防污性能.研究结果表明,织构化涂层表面的接触角随微/纳凸柱状织构的表面覆盖率增加而增加,而丝藻和舟形藻的附着量随着微/纳凸柱状织构化表面覆盖率的增加而减小.当微/纳凸柱状织构表面覆盖率为21%时,相对于无织构化涂层,丝藻的附着量降低了82%,舟形藻的附着量降低了73%.通过对比两种藻类与微/纳凸柱之间距离的大小并结合织构化涂层的润湿行为,分析了织构化涂层有效防除丝藻和舟形藻附着的原因和机理.     

Phenotypic and genetic variation between two populations of the Chinese yellow pond turtle, Mauremys mutica （Cantor, 1842）

Mauremys mutica (Cantor, 1842) is an endangered species in China. Main phenotypic variations in body color, body weight, body shape, clutch size, egg size, and hatchling size were revealed between the southern and northern populations. Both populations have the phenomenon of "larger male" sexual size dimorphism (SSD), especially in the southern population. Furthermore, genetic variations between the two populations were analyzed by RAPD band patterns of 30 random individuals in each population. The average genetic distance was 0.299±0.108 among the samples of two populations. The average genetic distance between southern and northern populations was 0.305±0.046. Cluster analysis indicated that all the individuals from the southern and northern populations were clustered among themselves to form two distinct clades. A total of 20 population-specific RAPD fragments were scored from 16 primers, and could be used as RAPD markers for distinguishing the southern and the northern population. Based on the nucleotide sequences of two RAPD markers, two pairs of SCAR primers (SC1-S and SC2-S) were designed, which could be used as SCAR markers for the southern population. According to the significant phenotypic and genetic variations, we suggested that the northern population and southern population might be considered as two separate taxa, the "northern taxon" and the "southern taxon", and the conservation should be respectively conducted on the two taxa.     

黄喉拟水龟的研究进展

黄喉拟水龟(Mauremys mutica Cantor)在国内分布较广,生长适宜温度为20～32℃.在人工养殖条件下,黄喉拟水龟性成熟年龄可以提前,孵化率可达84.2%.养殖温度适宜时黄喉拟水龟生长较快,疾病少,容易养殖.人工养殖黄喉拟水龟占地面积小、饲养管理方便、经济效益高,可以发展成为调整优化农村产业结构和增加人民收入的新兴产业.     

温度对黄喉拟水龟稚龟生长的影响

目的：通过研究黄喉拟水龟稚龟在不同温度下的生长情况,了解温度与龟的生长关系,为龟类的人工养殖提供理论依据．方法：两组龟分别在恒温与室内常温条件下饲养165d,每隔5d测量其体质量、背甲长、背甲宽和体厚,然后进行统计学分析．结果：实验结束时,恒温越冬的稚龟平均背甲长为53．420mm,背甲宽为44．761mm,体厚为23．307mm,体质量为29．768g,日增质量为0．193g,存活率为100％．常温越冬的稚龟平均背甲长为47．185mm,背甲宽为39．868mm,体厚为20．023mm,体质量17．304g,日增质量为0．025g,存活率为90％．两组稚龟的体质量与背甲长、体质量与背甲宽、体质量与体厚、背甲长与背甲宽、背甲长与体厚以及背甲宽与体厚之间均存在着显著的正相关关系．常温下体质量的生长模式为：m=18．4822—0．0642D＋0．004D^2;恒温下体质量的生长模式为：m=17．273337e^0.005982D．在同等条件下,稚龟个体间的生长也有差异．结论：温度与龟的生长有密切关系,加温可以促进龟的生长。