The anther possesses four microsparangia with its wall composed of four layers: epidermis, endothecium, middle layers and a 2\|nucleate celled tapetum.

絨氈層細胞在發(fā)育后期由單核分裂為2 核一级黄色视频在线免费播放A级，多原位解體唐人呦一呦二在线播放，為腺質型国产人成网站18禁止免费网站；但大約有12％小孢子囊的絨氈層在小孢子四分體釋放時期進入花藥室內黄色性爱啪啪免费观看，成為變形絨氈層啊啊啊作爱免费视频暴。

Recurvata occurred in the Posongchong Formation of Zhichang Section, Wenshan District. Detailed research shows that Huia gracilis sp. nov. has K- or H-type branching in the rhizome.

莖軸光滑欧美熟妇A片黄在线视频，二叉分枝国产高清精品福利，直立的長楔形孢子囊側生精品国产91对白，松散螺旋排列，具長柄午夜aa视频免费，由較小的近軸瓣和較大的遠軸瓣組成欧美性色黄A片，兩瓣凹凸，開裂縫具明顯的邊緣加厚帶亚洲岛国性爱视频。

Sori 1-5 pairs borne on the lower surface of ultimate lobes at the end of basal veins; indusium dehiscent in two equal halves when mature.

孢子囊群1-5對日韩视频中文字幕无码不卡，生於末回裂片下面近基部小脈頂端；囊群蓋成熟時對開2裂久久r性。

Germination rate of sporangium in different temperature, pH and nutrition was examined with suspending-drop method.

用懸滴法測定溫度大屁股网站、營養(yǎng)和 pH值對孢子囊萌發(fā)的影響，用硫酸法控制小容器相對濕度和載玻片法測定濕度對孢子囊萌發(fā)的影響亚洲电影色色黄片。

Microspore Ye as the feather, small sporophyll sac formed by the polymerization, each polymer capsules formed by four small sporangia, small spores with dual airbags, and airbag Pinaceae pollen is similar to large sporophyll from the central axis and arranged in Brachypodium feather composition, Each Yibing has a shell bucket, each bucket containing shell upright ovules 10-12 months.

小孢子葉枝為羽狀18岁禁止在线免费观看，小孢子葉由聚合囊組成，每個聚合囊由4個小孢子囊組成求a片网址，小孢子具雙氣囊国产自产精品视频，與松科植物花粉的氣囊相似，大孢子葉由中軸及羽狀排列的短柄組成色呦呦网站直接看的，每一柄上有一個殼斗日本三级片在线免费播放，每個殼斗內有10—12個直立的胚珠。

Thus the stamens of angiosperms and the microsporophylls of lower vascular plants are said to be homologous, being derived from a leaflike structure bearing the.

所以被子植物的雄蕊和低等維管植物的小孢子葉可以被稱為同源，源于產(chǎn)生小孢子囊的葉狀結構玖玖爱精品视频在线观看免费2。

Results:(1) The conchosporangia of brown yellow mutant was smaller and mature time was 15 days later than the parents. Thallus grew slowly in early stage, but average daily growth rate reached (7.50±1.18) cm after blade length was over 60 cm.(2)The emerald conchocelis were easy to mature and had special developmental mode that the spherulocytes can directly develop into sporangial branchlets and conchosporangia without thick conchocelis stage. Emerald blades were low in RPE with just (6.4710±0.0184) mg/g dry mass. The thallus grew quickly, average daily growth rate reached (11.95±2.33) cm after blade length was over 60 cm.(3) The conchocelis filaments of breen mutant were thin and short. Thallus grew slowly and had low contents of three phycobiliprotenin and chlorophyl.

實驗進行50d国产产一区二区三区久久毛片最强。結果：(1)褐黃色突變體藻藍蛋白和別藻藍蛋白含量低；孢子囊枝的細胞較小黄片毛片免费大全，且大量形成時間比親本晚15d人人操人人草人人草人人叉人；幼苗培養(yǎng)初期日平均生長量僅為(1.22±0.28)cm，當葉片長到60cm左右時生長優(yōu)勢逐步凸顯71av视频在线，日平均生長量可達(7.50±1.18)cm国产丝袜高清在线精品一区；(2)翠綠色絲狀體容易成熟，發(fā)育方式特殊美国大片又乱又伦，營養(yǎng)藻絲不經(jīng)過藻絲加粗階段禁看网站，直接由球形細胞發(fā)育成孢子囊枝和殼孢子囊；翠綠色葉狀體藻紅蛋白含量低a欧美专区，僅有(5.5130±1.0496)mg/g成人免费视频网站；葉狀體生長快速，60cm長的藻體日平均生長量高達(11.95±2.33)cm天堂视频网站在线观看；(3)褐綠色突變體藻藍蛋白亚洲91呦呦视频、別藻藍蛋白和藻紅蛋白這3種色素蛋白和葉綠素的含量均較低；藻絲細胞短且細中文无码视频t，葉狀體生長速度較慢最新白嫩丰满美女AV网站。

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個小孢子囊色视频在线一区二区三区，花藥壁由表皮一级欧美黑人大战白妞、藥室內壁、2~3層中層和1~2層絨氈層組成黄色视频.com888。

Petals absent. Stamens (8-)10; anthers distinctive in comprising only 2 microsporangia.

萼片(4或者)5(-7)色秀视频a8a6com。花瓣無一级涉黄；雄蕊(8-)10黄片A片三级aa黄；花藥在只包括2小孢子囊過程中特別。

Pollen cones terminal, solitary or clustered in leaf axils, or borne in spikelike complexes; individual cones pedunculate or sessile; microsporophylls numerous, spirally arranged, with distinct adaxial and abaxial surfaces; microsporangia 2; pollen 2(or 3)-saccate in Chinese species,.

雄球花單個頂生先锋影音每日AV资源站，或者在葉腋簇生a级黄片一级，或者形成穗狀復合花序；雄球花有花序购芪酆芑频氖悠低荆或者無99热W亚洲精品国产99；小孢子葉許多，螺旋狀排列尤物成人高清在线观看网址大全免费，背腹面顯著；小孢子囊2個；中國的種類的花粉2 (-3)氣囊亚洲图片一级色，大学生一级A片。