micropylar end中文什么意思

珠孔受精

• end:    n. 1.端，尖，末端，终点。 2. ...
• micropylar:    珠孔的,卵孔的
• micropylar canal:    珠孔道

例句与用法

1. ( 4 ) fluorescent investigation shows that pollen started to germinate about 20 hours later after deposited on the stigmas , only 1 or 2 pollen tubes can penetrate ovary to micropylar end on the fifth day . callose plugs evenly formed in the pollen tube , and sometimes callus deposited randomly along pollen tube wall and even the whole tube wall . ( 5 ) 16 species of insects visited c . praecox in nanjing , belonging to hymenoptera , diptera , coleoptera , thysanoptera and spiders ( arachnoidea ) ; apis cerana cerana fabricius , aldrichina grahami ( aldrich ) , epistrophe balteata de gee , musca hervei villeneuve are its main efficient pollinators
   ( 5 )南京地区蜡梅的访问昆虫约16种，分属膜翅目hymenoptera 、双翅目diptera 、鞘翅目coleoptera ，缨翅目thysanoptera 、及蛛形纲arachnoidea ，主要传粉昆虫有4种：膜翅目蜜蜂科东方蜜蜂中华亚种apisceranaceranafabricius 、双翅目蝇科muscidae黑边家蝇muscaherveivillcneuve 、丽蝇科calliphoridae巨尾阿丽蝇aldrichinagrahami ( aldrich )及食蚜蝇科syrphidae黑带食蚜蝇epistrophebalteatadegeer ；亮叶蜡梅的访问昆虫约18种，分属鞘翅目coleoptera 、半翅目hemiptera 、缨翅目thysanoptera 、膜翅目hymenoptera 、双翅目diptera 、鳞翅目lepidoptera ，另外有蛛形纲arachnoidea的蜡橄ch俪ononthuspr口ecox ( l
2. It was also found that the nuclear envelope disappeared earlier at the micropylar end than that at the chalazal end . the speed of the programmed cell death were different in three nonfunctional megaspores at the micropylar end and their relationships with the neighboring cells were also different . the biological significance was discussed about these phenomenon
   还发现了大孢子母细胞合点端的核膜先于珠孔端的消失，并且珠孔端3个大孢子的死亡时间不同，与相邻细胞的关系也不同，进而讨论了这些现象的生物学意义。