Examples include certain species of lycopodium and selaginella , which have two rows of lateral leaves and one or two rows of smaller abaxial or adaxial leaves 例如石松属和卷柏属，植物体上具有双行较大的侧生叶，还有1行或2行较小的生于近轴面或远轴面的叶。
2.
At the end of february , the bract attained approximately their full size , and a pair of anatropous ovules were initiated on the adaxial surface at the base of the fertile ovuliferous scale 2月底，苞片体积不再发生变化，珠鳞膨大端的基部的近轴面分化出2个倒生胚珠。
3.
Early leaf development is artificially divided into three main stages : the initiation of leaf primordium , the establishment of leaf adaxial - abaxial polarity , and the expansion of leaf blade 早期叶片发育包括三个主要过程：叶原基的起始，叶片腹背性的建立和叶片的延展。
4.
With colourless nail polish , study on the stomatic distribution of outer epidermis in the young stem , aged stem and aged leaf sheath , and adaxial and abxial leaf epidermis of young and aged leaves in s . purpurea , z . pendula and c . communis was conducted 用无色指甲油印痕法对鸭跖草科的紫竹梅、吊竹梅和鸭跖草的幼茎、成熟茎、成熟叶鞘的外表皮和幼叶、成熟叶和上、下表皮的气孔分布进行观察。
5.
With colourless nail polish , study on the stomatic distribution of outer epidermis in the young stem , aged stem and aged leaf sheath , and adaxial and abxial leaf epidermis of young and aged leaves in s . purpurea , z . pendula and c communis was conducted 摘要用无色指甲油印痕法对鸭?草科的紫竹梅、吊竹梅和鸭?草的幼茎、成熟茎、成熟叶鞘的外表皮和幼叶、成熟叶和上、下表皮的气孔分布进行观察。
6.
In this paper the floral ontogeny and the ovary development of rivina humilis l . were observed . the results showed that ( 1 ) the tepal primordia initiated in 2 / 5 spirals . the abaxial one initiated first , then the adaxial one , finally the lateral two initiated nearly simultaneously . the third one initiated on the position near the first tepal , and there is a gap between itself and the second tepal . ( 2 ) the 4 stamineal primordia initiated in one whorl at the same time . ( 3 ) the carpellary primordium initiated from the abaxial side of flower primordium ; the carpellary primordium grew upwards and towards axis after it was formed , therefore an elliptic orifice was formed at the adaxial position of ovary , which was the remainder of the mouth of ovary before the ovary was fused completely . with the ovary maturing , the orifice was narrowed because of the ovary growth , at last fused completely . the gynoecium is composed of a single carpel . ( 4 ) in the series developmental sections of ovary , the ovular primordium was initiated on the adaxial meristem when the mouth of ovary was formed 对数珠珊瑚的花器官发生和子房的发育过程进行了观察.结果表明: ( 1 )数珠珊瑚花被呈2 / 5螺旋状发生,远轴侧的1枚先发生,其次为近轴侧的1枚发生,最后侧方的2枚花被几乎同时发生,第3枚花被在靠近第1枚的位置发生,第2枚和第3枚之间有1个空隙; ( 2 ) 4枚雄蕊是同时发生的; ( 3 )心皮发生于分生组织的远轴侧,心皮原基形成后,向上向轴生长,在子房成熟前在近轴侧非正中位形成1个孔,该孔为心皮最终愈合前的残迹,到子房成熟时,因子房的生长孔被挤压缩小,在进一步的生长过程中愈合.子房由1枚心皮构成; ( 4 )从子房发育过程的切片看,该植物的胚珠是在子房发生后不久发生的,子房上的圆孔形成时,从近轴侧的分生组织发生胚珠原基,由胚珠原基分化出珠被与珠心
7.
The sequence analysis revealed that the as1 gene encodes a myb protein , which is a candidate transcription factor . in as1 and as2 mutants , the polarity formation in leaves is defective . cell differentiation along abaxial - adaxial , proximal - distal and media - lateral axes all shows an insufficient fashion 通过扫描电镜、干涉相差显微镜、组织切片、过量表达等手段研究了as1和as2的功能，包括观察观察突变体的组织、细胞结构及早期发育状况，同时采用gus表达、 rt - pcr 、原位杂交、 northern等手段分析基因的表达情况。
