The result is consistent with previous studies. Whereas, tapetal cells of sterile anthers were disintegrated since tetrad cells were disjoined, indicating that disintegration of tapetal cells is earlier occurred in sterile anther than that in fertile anther. DNA ladder revealed that the cleavage of nuclear DNA into oligonucleosome-sized fragments to

結(jié)果表明欧美一级aa黄片系列精品99，在花粉母細(xì)胞減數(shù)分裂后的四分體解離時(shí)期性爱视频免费无码，不育花藥的絨粘層細(xì)胞較可育花藥提前開始裂解18禁在线永久免费观看不卡；在不育系S-Mo17rf3rf3花藥和花粉S-(rf3)中均明顯出現(xiàn)PCD過程的DNA片段化以及線粒體細(xì)胞色素C外滲的現(xiàn)象1024色婬免费视频，證明了玉米CMS-S的花粉敗育與花藥絨粘層細(xì)胞的提前凋亡和小孢子細(xì)胞的細(xì)胞程序性死亡有關(guān)2022韩国限制级电影在线观看。

is that Tai Yu-D2 male sterile lines abortion occurs in monokaryon stage, the tapetal expanding abnormally occurs in dyadphase stage, pollen aborts completely, is a type of no pollen.

泰玉D2不育系花藥絨粘層在二分體時(shí)期成輻射狀膨大日韩视频第一区，小孢子在單核期敗育，花粉敗育完全97sese社区，屬無花粉類型性无码人妻夜夜。

The results showed: four devices flower pollen sacs, anther wall conforms to the basic, from epidermis, the indoor wall, middle (2-3 layers) and tapetal composition tapetum to glandular type.

對懸鈴木小孢子發(fā)生及雄配子體發(fā)育過程進(jìn)行了觀察，結(jié)果表明：花藥具4個(gè)花粉囊av一级片黄色网站，花藥壁發(fā)育為基本型很操亚洲美女，由表皮、藥室內(nèi)壁免费看黄的视频网站、中層（2-3層）和絨氈層組成欧美一级A片裸体视频，絨氈層為腺質(zhì)型。

The vascular bundle of stem is the type of double phloem. The anther is tetrasporangiate. Simultaneous cytokinesis in the microspore mother cell follows meriosis.

莖的維管束是雙韌類型国模一区二区三区私拍视频大胆；雄蕊的花藥四室中文字幕综合国产，小孢子的形成為同時(shí)型胞質(zhì)分裂，懸垂胎座鸥美一级久久AA高清，倒生胚珠人人爽碰97青青草原，核型胚乳，果實(shí)成熟時(shí)胚仍處于球形胚階段影音先锋色资源站。

HOEFERT L L Ultrastructure of developing sieve elements in Thlaspi arvense L.:Maturation 10.2307/2442642 AMERICAN JOURNAL OF BOTANY , 1980,2

王毅%胡適宜棉花小孢子發(fā)生過程中細(xì)胞質(zhì)的超微結(jié)構(gòu)變化：著重&細(xì)胞質(zhì)改組&問題植物學(xué)報(bào)亚洲免费网址你懂的， 1993，4

In the course of present investigation in interspecific hybrid of Tritical crops, cytomixis mas observed at microspore stage, the present investigation deals with detailed analysis of this phenomenon at different conditions.

作者在麥類遠(yuǎn)緣雜種的減數(shù)分裂過程中發(fā)現(xiàn)人人射人人奸，在減數(shù)分裂Ⅰ的前期和小孢子時(shí)期均存在核穿壁的現(xiàn)象国产精品一级无码色欲，并對各種狀態(tài)下的穿壁現(xiàn)象進(jìn)行了詳細(xì)的觀察研究。

These abnormal cells became dramatically vacuolated and hereafter disintegrated completely at later stage.

這類異常的小孢子母細(xì)胞在隨后的發(fā)育中逐漸液泡化并最終解體日韩精品福利一区二区在线。

The disorganizing sequence of microspore is as follow: firstly, cell membrane dissolved, cytoplasm degenerated and became thiner; then, nuclear membrane dissolved, nuclear degenerated, and the last was nucleolus.

小孢子細(xì)胞解體順序?yàn)椋杭?xì)胞膜首先斷裂亚洲免费永久资源网站，細(xì)胞質(zhì)分解變稀薄，然后是核膜斷裂wwwav在线，細(xì)胞核降解国产性爱自拍视频，細(xì)胞質(zhì)及細(xì)胞核降解物質(zhì)充滿整個(gè)藥室欧美一级A片在线视频，最后核仁解體。

It is essential for trans-ferring development pathway that pollen starves for carbon sources.

小孢子對碳源的饑餓對其脫分化是必需欧美老熟妇伦视频。

Scanning electron microscopy revealed that the microspores could not form normal exine.

掃描電鏡觀察結(jié)果顯示国产原创激情在线观看网站免费视频，小孢子壁光滑，不能形成正常的外壁欧美肛交视频。