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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 GA1/3.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 GA1/3 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 GA1/3 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. 相似文献
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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, 相似文献
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