It hit us like a bolt out of the blue that he goes to anther school.

我們誰也沒有料想到，他去了另一所學(xué)校欧美丰满熟妇性69。

The plant expression vectors were constructed and two genes were transferred into A. thaliana and N. tabacum, antikanamycin plants were obtained.4. The trials of adventive bud regeneration directly and callus induction was conducted to select out the optimal explants and formula. The results revealed that double scale can produce 13~16 adventive buds per centimeter in MS medium added 10.0 mg/L 6-BA, 1.0 mg/ L NAA, 40 g/L sugar and 7.5 g/L agar. Scale, leaves, scape and different tissue of flower can be induced to produce callus in appropriate medium, but the filament with anther was the optimized explant.

構(gòu)建了兩個(gè)基因的pBI121和pCAMBIA1300植物表達(dá)載體，并通過農(nóng)桿菌將上述基因轉(zhuǎn)入煙草和擬南芥中国产精油按摩一级毛片，得到了卡那抗性的再生植株黄色大片最新网址品尚j8。4大陆三级片99免费视频、以中國水仙不同部位外植體進(jìn)行了不定芽直接分化和愈傷組織誘導(dǎo)分化試驗(yàn)，結(jié)果表明AAAAA欧美一级黄色片，雙鱗片外植體在MS0+6-BA 10.0 mg/L+NAA 1.0 mg/L+蔗糖40 g/L+瓊脂7.5 g/L培養(yǎng)基上可以大量地直接再生qvod激情图片，再生芽數(shù)量平均可達(dá)13~16個(gè)/cm雙鱗片，比傳統(tǒng)的鱗莖盤之間分化提高30~50%先锋xfplay色资源网站123；鱗片黄色做吊逼、葉片无码自拍日韩视频、花葶及花部不同組織在適宜的配方中均可不同程度地誘導(dǎo)出愈傷組織，但以帶花藥的花絲誘導(dǎo)出的愈傷組織最好五级全黄的视频在线观看。

Cytological observations of the anther development of pms15-16-2-3 mutant and the wild-type plant showed that the mutant middle layer degenerated later, both the tapetal cell morphology and the tetrads were abnormal, which resulted in few fertile pollen grains formed in the anther.

細(xì)胞學(xué)觀察表明激情图区亚洲，突變體在花藥發(fā)育的過程中欧美一二三区视频，中層細(xì)胞延遲降解，絨氈層細(xì)胞形態(tài)分化異常，出現(xiàn)異常的四分體色色66精品，導(dǎo)致最終只能形成少量的花粉搜欧美性爱黄色网站。

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)果表明国产伦精品一区二区三区免费视频，在花粉母細(xì)胞減數(shù)分裂后的四分體解離時(shí)期日韩另类综合福利网站在线播放视频，不育花藥的絨粘層細(xì)胞較可育花藥提前開始裂解；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)象国产色噜噜噜在线精品蜜臀，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)。

According to anther abortion characteristics and hormone functions, it was suggested that IAA, GA3 and ZR deficiency might be associated respectively with the inhibition of starch grain accumulation, pollen mother cell and tapetal cell expansion and tetrad formtion, and that abortion and even death of pollen mother cells and tapetal cells in sterile anther might be accelerated by high ABA accumulation.

根據(jù)內(nèi)源激素的功能推測99久久这里只有精品，不育花藥IAA含量過低使花藥淀粉積累受阻欧洲欧洲成人片在线观看，GA_3含量不足影響花粉母細(xì)胞和絨氈層細(xì)胞的膨大人人射，過低的ZR含量使花粉母細(xì)胞不能分裂形成四分體，過高的ABA含量促進(jìn)花粉母細(xì)胞退化和死亡最新国产主播精品福利直播。

No tapetal cells were formed or tapetam collapsed at very early stage in some anther chamber during the microsporogenesis; Pollen mother cells in another chamber were not developed and microspore vacuolized; Tapetum cells developed abnormally, giantized and crammed the anther chamber; Some tapetum cells developed normally, but PMCs developed abnomally, which deformed at sporogeneous stage, and then were abhensive each other and finally degenerated. Nearly no PMCs could complete the process of meiosis, and form the tetrad, leading to the failure of normal microspore development.

藥室的絨氈層細(xì)胞不形成或提前解體在线A片视频网观看；藥室內(nèi)的花粉母細(xì)胞不發(fā)育或小孢子液泡化；絨氈層細(xì)胞發(fā)育異常欧美日韩va视频，出現(xiàn)巨型化而擠滿整個(gè)藥室CO∩Xingaiwww；絨氈層細(xì)胞雖發(fā)育正常，但花粉母細(xì)胞發(fā)育異常日木一级坐爱片，在造孢細(xì)胞時(shí)期即開始出現(xiàn)變形現(xiàn)象产国69囗交视频国产，隨后發(fā)生粘連退化；絕大部分花粉母細(xì)胞不能完成正常的減數(shù)分裂過程形成四分體欧美视频黄页播放大全，導(dǎo)致小孢子退化日韩美女偷自拍视频网站在线观看免费。

The anther was tetrasporangiate, originated from the stamen primordium. The anther wall was composed of epidermis, fibrous endothelium, middle layer (2~3 layers) and tapetum (1~2 layers).

觀光木的花藥由花藥原基發(fā)育而來，具4個(gè)小孢子囊wwwjjzz，花藥壁由表皮A级毛片误无码免费真人久久、藥室內(nèi)壁、2~3層中層和1~2層絨氈層組成欧美A片激情。

Molecular studies have identified some genes participating in this process, including those regulating anther cell division and differentiation, controlling male meiosis, supporting pollen development, and promoting anther dehiscence.

分子生物學(xué)的研究已經(jīng)發(fā)現(xiàn)了一些參與這一過程的基因干操美女，包括控制花粉囊組織的分化、小孢子母細(xì)胞的減數(shù)分裂欧美又粗又大午夜AAA级、小孢子的發(fā)育和花藥的開裂等无码日韩免费专区迅雷下载。

Selective abortion stage of the stamen was primarily manifested in the stage of archesportial cell formation through anatomic observation for male sterile flower and male fertile flower. There was no archesportial cell development or anther production and was a male sterile line without anther.

通過對不育系和可育系小花的細(xì)胞及形態(tài)解剖學(xué)觀察，初步確定萬壽菊雄蕊選擇性敗育的時(shí)期国产av日韩，為花藥受阻于花藥原基細(xì)胞分化期黄色网站在哪里，無孢原細(xì)胞形成和藥室分化，屬于無花粉囊型不育系色碰碰碰黄色视频特黄色视频。

The results showed that the varieties and activity of POD isoenzyme expression exist in difference in anther of male sterility line and maintainer in different development stage in sweet pepper and hot pepper. POD isozyme activity of anther was very low in meiosis stage in male sterility line of sweet pepper. There is a POD special band in meiosis and pollen mature stage in male sterility line of pepper respectively.

結(jié)果表明不育系與保持系欧美国产亚洲日本韩国VA，在花藥發(fā)育的不同時(shí)期POD同工酶表達(dá)種類及表達(dá)活性之間存在差異，其中甜椒不育系在減數(shù)分裂期POD同工酶的活性非常低欧美性爱视频污免费欧，辣椒雄性不育系在減數(shù)分裂期及花粉成熟期分別多一條POD特征帶怡红院欧美优物性爱。