外中胚葉 的英文怎麼說
中文拼音 [wàizhōngpēiyè]
外中胚葉
英文
ectomesoblast-
The neurofibromas are multiple benign neoplasms of the peripheral nervous system, arising from mesodermally-derived schwann cells.
神經纖維瘤是外圍神經系統的多發良性腫瘤，由中胚葉的雪氏細胞發生。In this paper, the taxonomical problems of tulipa l. from china were studied based on the results of both the field observation and the examination of herbarium specimens, and the analysis of leaf epidermis morphology, pollen morphology, seed coats micromorphology and comparative embryology. the main results are as follows : ( 1 ) tulipa l. from china is taxonomically revised. there are 16 species distrubuted in china and tulipa kuocangshanica d. y. tan, x. r. li et d. y. hong is described as new
本文通過野外調查及憑證標本的考證，並結合葉表皮形態、花粉、種皮的微形態及比較胚胎學等方面的觀察，對國產鬱金香屬植物分類中存在的問題進行了研究，主要內容如下： （ 1 ）對國產鬱金香屬植物進行了了修訂，確認了國產鬱金香屬植物共有16種，其中新種1個: tulipakuocangshanicad . y . tanx . r . lietd . y . hong 。6. transformation system of mustard a serials of kanamycin concentration was added to optimum medium to test the explants resistance capacity of two kinds of mustard. the transformation procedures described were derived from numerous regeneration and trasformation designed to test factors that might affect shoot regeneration, which including length of co - cultivation. those producing the best result parameters were described as below : after the mustard explants were precultured on regeneration medium for 2 days. they were inoculated with agrobacterium for 20 minutes. inoculated explants were co - cultivated for 4 days and in shadow at first 2 days. then transferred to the same medium plus 30 mg / l kanamycin and 500mg / l garb. all of them were transferred to fresh medium every 2 weeks. the kan - resistant plants were regenerated
芥菜外植體高頻遺傳轉化體系的建立在最適培養基上試驗了兩類芥菜的三種外植體對卡那黴素的敏感性、預培養天數、浸菌時間等因素的影響，建立了芥菜高頻轉基因再生體系：取生長4天的芥菜子葉、下胚軸和25天的葉片在分化培養基上（ ms + ba3 . 0mg / l + naa0 . 1mg / l ）預培養2 - 3天後，投入農桿菌菌液中浸染20分鐘，在分化培養基上暗培養2天，正常條件下培養2天後，轉入抗性培養基（ ms ba3It showed that the induction efficiency of the resistant calli were the same among all explants of different age, but the embryos on the calli from explants of 7 days appeared earlier than those from explants 11 and 30 days. in order to compare the resistant calli induction efficiency, petioles and hypocotyls were excised from 30days aseptic seedlings to transform with pbinctbs under the same condition. the resistant calli induction efficiency of petioles was higher than those of hypocotyls. a more detailed analysis of the different types of explants showed that the number of pcr positive plants induced from petioles was higher than that from hypocotyls
在相同條件下的轉化實驗中，發現不同苗齡的外植體的抗性愈傷的誘導頻率基本相同:還進一步研究了胡蘿卜同一苗齡不同部位的抗性愈傷形成率，同時用3od苗齡（照光3周）的葉柄和下胚軸做轉化實驗，發現葉柄的抗性愈傷形成率高於下胚軸的抗性愈傷形成率，進一步的實驗發現，由葉柄誘導的苗子的陽性率高於由下胚軸誘導的苗子的陽性率，此結果和pawlicki的結論是一致的。分享友人