玉米转基因育种研究进展

玉米转基因育种在过去20年里取得了很大进展,转基因育种技术是影响其种质发展的主要因素,也是培育高产优质玉米品种的有效方法.综述了近年来玉米转基因技术体系的发展及其在抗病虫、抗除草剂、抗逆、品质改良等领域中的应用情况,并对其存在的问题及发展趋势进行了讨论.     

蟹爪兰的养护与双花培育

蟹爪兰（Zygocactus trurncatus）又名蟹爪莲、圣诞仙人掌、接骨兰、蟹足霸王树,属仙人掌科、蟹爪兰属,多年生常绿植物,老株基部常木质化。枝茎变态呈片状,表面暗紫红色,多分枝,常成簇下垂向四方扩展,变态茎节多而短小,两端及边缘有2～4个尖齿,似螃蟹的爪子,中央的骷部明显而突出。由于其开花正逢圣诞前后,故而西方又称为“圣诞花”,是一种冬季非常理想的室内盆栽花卉。自1918年被发现并进行栽培以后,通过杂交选育出的园艺品种已有200种以上,花无梗,横生于茎节先端,花色变化丰富,有玫瑰红、粉红、鲜红、紫红等,花朵开放后花瓣呈现金属光泽,偏漏斗形,稍反卷,     

离体玉米茎尖直接产生雌、雄花序过程中内源激素的研究

Using ELISA(Enzyme Linked Immunosorbent Assay) methods,three-type phytohormone in cultured shoot apices of maize were determined.It showed that the contents of three kinds of endogenous cytokinins changed unbalanced,which including ZRs,DHZRs and iPAs,cytokinins kept in high contents totally compared to the contents of IAA and GA_1/3.The concentration of IAA decreased with the in-vitro culture time was postponed,specially at the time of the 35-40 days when the ears or tassels emerged from the in vitro cultured shoot apices.The contents of GA_1/3 increased steadily in all 40 days of the in-vitro culture progress,but the concentration of ABA kept in a very low level in all the in-vitro culture progress.These results exhibited that both GA_1/3 and three kinds of cytokinins played an important and positive role when the maize shoot apices changed from the vegetative developmental stage to the reproductive one.     

植物生理学实验视频的录制与应用

为进一步提高植物生理学课程的学习效率,精心制作了包含四大类9个实验的植物生理学实验视频并上传至学校的网络教学平台,以期增加学生对植物生理学实验的直观认识,使学习者可以更方便、更迅速、更愉快地完成学习过程。