茄子子叶原生质体再生可育植株

将茄子子叶原生质体放在0.75％纤维素酶R-10、0.2％半纤维素酶Rhozyme和0.2％果胶酶溶液中分离。原生质体在培养基中诱导出小愈伤组织。愈伤组织在Ms+2mg/l KT+0.005mg/l NAA+2％蔗糖的固体培养基中,一个月后分化出芽。芽生长至3—4厘米高,转接在Ms+0.1mg/l 1AA+1％活性炭+2％蔗糖的培养基上,一个星期后可长出根,继而形成完整植株。随后移栽至灭菌的混合土壤中长到开花结果。     

番茄子叶原生质体再生植株

从番茄2—3周苗龄的子叶游离原生质体,在 MS 液体培养基中(附加2,4-D 1,6-BA 0.1mg/l)培养;在培养过程中经常不断添加新鲜培养液。6周后将细胞团移到半固体 MS 培养基上(附加成份同上,琼脂0.3%)。然后将肉眼可见的愈伤组织再移入 MS 固体培养基上,愈伤组织长到直径为5 mm 大小时,转到 MS 分化培养基上(附加6-BA 2 mg/1,[AA 0.2 mg/l)诱导分化,得到了再生植株。比较了固体培养、悬浮培养和双层培养三种方法,观察原生质体生长情况,以双层培养为好。     

党参原生质体再生植株

党参下胚轴愈伤组织原生质体在附加１．２ｍｇ／Ｌ２,４－Ｄ,０．２ｍｇ／Ｌ ＮＡＡ,０．２ｍｇ／Ｌ ＢＡＰ和０．１ｍｇ／Ｌ ＺＴ的ＭＳ,Ｃ８１Ｖ,ＤＰＤ及ＫＭ８ｐ培养基中进行液体体层培养。在ＫＭ８ｐ中获得了最高的分裂频率。葡萄糖作渗透剂优于甘露醇,两结合使用效果更好。在合适的条件下,原生质体培养３天出现第１次分裂,４周内形成大细胞团,培养６周后形成０．５－１．０ｍｍ大小的小愈伤组织。在附加２％蔗糖     

绿豆未成熟子叶及其原生质体的培养(简报)

豆科植物的未成熟子叶由分生细胞或尚未成熟的细胞构成,在组织培养中较易诱导细胞分裂和器官分化,近来常被用作分离原生质体的材料。绿豆(Phaseolus aureus)是一种重要的杂粮作物,其组织培养中植株再生十分困难,由原生质体培养再生植株至今尚未见有报     

新疆甜瓜子叶原生质体的培养和植株再生

从新疆甜瓜(Cucumts melo L.)的无菌苗子叶游离原生质体,用改良的 Miller 培养基(Ma)培养,得到了再生细胞的高频率分裂。比较了液体浅层培养、双层培养与琼脂糖珠看护培养等方法,发现由烟草瘤细胞 B_6S_3看护的琼脂培珠培养,最宜于新疆甜瓜子叶的原生质体。再生的愈伤组织经液体与固体两步培养程序分化出完整的小植株。     

Somatic Embryogenesis and Plant Regeneration from Protoplasts of Cowpea (Vigna sinensis)

Immature cotyledons of cowpea (Vigna sinensis Endlo) were used for protoplast isolation. Enzyme solution for protoplast isolation contained 40% cellulase Onozuka R-10,0.30% Macerozyme R-10 and 2% hemicellulase. The purified protoplasts were cultured in Bs,MS or KM8p liquid medium in dark (25℃) at a density of 1 × 105–5 × 105/ml. The protoplasts started cell division in 3–5 days . Sustained cell divisions resulted ill formation of cell clusters and small calli,with cell division frequency reaching 23%–28% in MS medium . Calli of 2 mm in size were transferred onto MSB (MS salts+B5 vitamins) medium with 2 mg/L 2,4-D, 0. 5mg /L BA forfurther growth. Embryogenic calli appeared on this medium. After passage to fresh medium with the same composition, the embryogenic calli were transferred into MSB liquid medium to establish suspension culture. When the suspended calli were transferred back onto MSB agar medium with 0. 1 mg /L IAA, 0.5mg/L KT, 5% mannitol (cultured in light,2000 lx,12h/d), a lot of adventitious roots formed in 7–10 days, and then somatic embryos formed from the protoplast derived calli. But only a few embryoids developed further into the cotyledonary stage ,and the others died at globular, heart-shaped, or torpeto stage . Finally, some cotyledonary embryoids germinated and developed into plantlets or shoots with leaves.     

Shoot Regeneration from Immature Cotyledons of Cicer Arietinum

Shoot regeneration was achieved from immature cotyledons of five chickpea (Cicer arietinum L.) genotypes: C235, ICC4971, ICC11531, ICC12257 and ICC12873. The cotyledons cultured on Murashige and Skoog (MS) medium supplemented with 3 or 5 mg dm^–3 zeatin with or without 0.04 mg dm^–3 indole acetic acid (IAA) showed formation of cotyledon like structures (CLS) at their proximal ends. Subsequently, shoot regeneration took place in some of the CLS forming explants. CLS were also formed in cotyledons cultured on MS + 0.2 – 1 mg dm^–3 thidiazuron (TDZ); direct shoot regeneration was observed in cotyledons cultured on 1 mg dm^–3 TDZ. The shoot buds elongated on media containing indole butyric acid (IBA), benzylaminopurine (BAP) and gibberellic acid (GA₃). Complete plantlets were obtained by rooting of shoots following pulse treatment with 200 mg dm^–3 IBA for 5 min and culture on growth regulator free half-strength MS medium.     

灰绿藜幼嫩花序的组织培养及植株再生

选用盐碱地灰绿藜(Chenopodium glaucum L.)幼嫩花序为外植体,建立了快速而高效的离体组织培养体系。在附加1.0 mg/L 6-BA和0.4 mg/L IBA的MS培养基上培养35 d可诱导出不定芽,诱导频率达到66.7%;不定芽在此培养基上可快速扩增和长期继代培养。不定芽转至1/2 MS NAA 0.2 mg/L培养基中培养2~3周,生根形成完整植株。     

甘蓝下胚轴原生质体再生植株

经纯化后,甘蓝下胚轴原生质体的产量为1．5×10⁶g^-1(Fw),采用液体浅层培养的方法进行培养。2～3d后,发生第一次分裂,第10天,统计分裂频率为6l％,5周内形成大量的细胞团和小愈伤组织,统计植板率为1．1％,把小愈伤组织转到与原生质体培养基相同激素的MS固体培养基上增殖。当愈伤组织长到3～5mm大小时,接到分化培养基上,芽分化率为46.7％．分化出来的芽长到3～4cm长时,从基部切下,插入生根培养基,两星期左右即可长成完整植株。     

诸葛菜(Orychopheagmus violaceus)叶肉原生质体培养再生植株

由诸葛菜无菌苗的叶肉组织分离原生质体,在附加0.5 mg/L BA,1.0 mg/L 2,4—D(或NAA)和9％甘露醇的MS液体培养基中作浅层培养,10d后分裂频率约45％,两周时形成大量细胞团,随后直接转到分化培养基上或逐步降低原生质体培养基的渗透压及生长素浓度,均可诱导形成大量苗或胚状体结构。转移到无激素的培养基上即可形成完整植株。     

Plant Regeneration from Protoplasts of Coriandrum sativum

Calli produced from stem segments of seedling of Coriandrum satwum which were cultured on MS agar medium containing NAA 1.0mg/L. The embryogenic cell colony suspension was estabilished on MS liquid medium containing NAA 1.0mg/L%2,4-D 0.2mg/L+BA 0.5 mg/L. The cell suspension culture was used for protoplast preparation. Protoplasts were obtained in the enzyme mixture containing 2.0% Onozuka R-10, 1.0% pectinase, 0.5% snailase, 0.5% dextran sulfate potassium Salt, 0.6mol/L mannital CPW solution at pH 5.8 and 25℃. Cultured in a KM8P liquid medium containing NAA 1.0mg/L+2,4-D 0.2mg/L+6-BA 0.5 mg/L, glucose 0.4mol/L and CM 20mi/L; the protoplasts entered the stage of derision after three days, cell clusters formed in 10 days and calli formed after about 50 days. When the calli were transferred to MS agar medium containing many growth substances, they differentiated into embryoids, and then developed into plantlet with many green leaves and roots on the 1/2 MS agar medium.     

Plant Regeneration from Petiole Protoplasts of Brassica napus

Two cultivars of Brassica napus, Altex and Canadian twins, were used as materials. Protoplasts isolated from petioles of plants grown in vitro were cultured in Nitsch medium supplemented with 0.5mg/L BA, 0.5mg/L NAA, lmg/L 2,4-D, 100mg/L serine, 800mg/L glutamine, 4% sucrose and 0.4mol/L mannitol. After 2 days of culture, the first division was observed. The division frequency estimated after 10 days of culture was 30-60%. One week after transferring onto MS medium containing 6mg/L GA3. and 3mg/L BA, protoplast-derived calli regenerated into shoots. The regeneration frequency of the two cultivars was 24% and 31% respectively. It was found that the protoplasts isolated from petioles could float on the surface of the 3% sucrose contained solution which was very favourable both to purification, and culture of the protoplasts.     

甘薯叶柄原生质体有效植株再生

将甘薯（Ｉｐｏｍｏｅａｂａｔａｔａｓ（Ｌ．）Ｌａｍ．）‘元气’和‘白星’（‘ＷｈｉｔｅＳｔａｒ’）的叶柄原生质体培养在含有０．０５ｍｇ·Ｌ－１２,４Ｄ和０．５ｍｇ·Ｌ－１ＫＴ的改良ＭＳ液体培养基中,３～４ｄ后细胞开始分裂。培养８～９周后,将直径达１～２ｍｍ的愈伤组织转移到添加０．０５～０．２ｍｇ·Ｌ－１２,４Ｄ和０～０．５ｍｇ·Ｌ－１ＫＴ或添加０．５～２．０ｍｇ·Ｌ－１ＮＡＡ和１．０～３．０ｍｇ·Ｌ－１ＢＡＰ的ＭＳ固体增殖培养基上使其增殖。转移３～５周后,将愈伤组织再转移到ＭＳ基本培养基或转移到添加２．０～３．０ｍｇ·Ｌ－１ＢＡＰ的ＭＳ培养基上。当进一步转移到ＭＳ基本培养基上后,从愈伤组织或从愈伤组织形成的不定根上再生出植株。‘元气’植株再生率高达６０．０％,ＷｈｉｔｅＳｔａｒ高达４３．４％。     

Plant Regeneration from Protoplasts of Actinidia chinensis Planch.

Protoplasts isolated from cotyledon callus line of A14N7 of Actinidia Chinensis Planch. were cultured in the improved NN-69 medium. First division of regenerated cells occurred during 7–10 days of culture, and percentage of the cell division was about 10% at day 20. The best result of protoplast culture was achieved when protoplasts were cukured in liquid medium at a density of 5× 104/ml, About 4 months, procoplast-derived calli were transferred stepwisely onto differentiation media where they developed into green compact calli, from which the perfect plants were regenerated.     

蚕豆染色体的复制带显带技术

本文采用作者首创的双周期BrdU二次标记法研究了蚕豆根尖细胞染色体的复制带,得到了分布在整条染色体上的清晰稳定的多条带纹.这是复制带首次在植物染色体上取得的具有实用意义的带型.为进一步制定植物染色体的标准带型和研究植物染色体的复制方式提供了一条途径.