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1.
B. S. Ahloowalia 《Euphytica》1987,36(2):659-665
Summary Plants were regenerated from callus cultures initiated from immature embryos of barley, Hordeum vulgare L. Immature embryos from seven diverse genotypes were cultured on modified Murashige and Skoog (MS) medium supplemented with 1.5 mg 2,4-D and 6.5 mg IAA/l. Of the 249 embryos cultured, 30% initiated callus within 8 days. Subculture of callus for 80 to 100 days on half-MS medium supplemented with 0.5 mg/l 2,4-D and 1.0 mg/l zeatin resulted in organogenesis. Culture of organogenic calli for 30 days on half-MS medium without growth regulators produced plants which originated mostly via multiple shoot formation. Callusing response of the tested genotypes ranged from zero to 44%; however, only 23% of the calli were regenerative. Regenerated plants included variants for chlorophyll deficiency, plant height, stem thickness, spike shape, pollen fertility, seed set and ploidy.  相似文献   

2.
对甘薯品种高系14号及其近缘野生种I.triloba L、和I.lacunosa L,进行原生质体植株再生研究。从离体培养植株的叶柄分离出原生质体,将其培养在含有0.05mg/L 2,4-D和0.5mg/L激动素(KT)的MS培养基中,从原生质体获得了高频率的愈伤组织。培养8-12周后,将直径达2—3mm的小愈伤组织转移到添加0.05mg/L 2,4-D的MS培养基上。转移3-6周后,将愈伤组织进一步转移到添加吲哚乙酸(IAA)和6-苄基嘌呤(BAP)的MS培养基上,一些愈伤组织再生出植株。未再生植株的愈伤组织进一步在MS基本培养基上培养,它们也再生出植株。本研究从I.triloba原生质体获得高频率的植株再生;首次从I.lacunosa原生质体再生出植株;从高系14号原生质体也再生出完整植株。  相似文献   

3.
新疆棉花4个主栽品种的体细胞胚胎发生及植株再生   总被引:15,自引:0,他引:15  
以新疆4个主栽棉花品种新陆中20、新陆早24、新陆早33和03298为材料, 通过不同浓度的激素组合成功地诱导获得了体细胞胚并进一步发育成苗。研究发现, 所用的4种激素组合均能有效诱导愈伤组织, 其中又以0.02 mg L-1或0.10 mg L-1 KT和0.1 mg L-1 2,4-D组合的诱导效果最佳; 两个诱导措施有利于胚性愈伤组织的产生, 即沿中柱纵切棉花下胚轴切段, 并以纵切面接触培养基; 愈伤组织诱导培养基中KNO3用量加倍。挑选黄绿色、灰绿色或浅绿色的质地疏松的愈伤组织继代于无激素且KNO3含量加倍的培养基中可产生胚性愈伤组织, 并在高比例KT/2, 4-D(0.05 mg L-1或0.10 mg L-1 KT和0.01 mg L-1 2,4-D)促进下发育成胚。借助在培养基上垫滤纸产生干燥作用, 并间隔使用强透气效果的棉塞对培养三角瓶进行透气处理, 体细胞胚可成熟发育并产生根系发达的正常再生植株。应用此法, 4个实验材料在6~8个月内即可获得大量再生苗。  相似文献   

4.
大蒜花梗组织培养再生植株   总被引:10,自引:0,他引:10  
取生殖期大蒜花梗,在N_6+2,4-D 2mg/L+KT 1mg/L培养基上暗培养30天后,得到微黄色愈伤组织。将愈伤组织转到N_6+2,4-D 0.5mg/L+KT 0.5mg/L培养基上继代二次,然后于N_6+BA 5mg/L+KT 1mg/L+IAA 0.01mg/L,MS(1/2大量元素)+BA 5mg/L+KT 1mg/L+IAA 0.01mg/L和MS+BA 5mg/L+KT 1mg+IAA 0.01mg/L培养基上光照培养。3周后愈伤组织上出现绿色丛生芽,将小芽转到MS(1/2大量元素)+NAA 0.01mg/L培养基上,一周后发生白色根并形成完整植株。2,4-D和KT对大蒜花梗愈伤组织发生是必要的,高浓度的细胞分裂素和低浓度的生长素有利于芽分化,高浓度NH_4~+有利于根分化,低浓度NH_4~+有利于芽分化。愈伤组织低温处理对芽的分化是必要的。另外,对花梗愈伤组织发生进行了细胞学观察。  相似文献   

5.
新陆早42号体细胞胚发生和植株再生   总被引:3,自引:2,他引:1  
 以新陆早33号为对照研究新疆主栽品种新陆早42号的体细胞胚胎发生。研究表明,所用4种激素组合均能有效诱导愈伤组织,但二者仅在经过IBA 1.0 mg·L-1+KT 0.5 mg·L-1和2,4-D 0.1 mg·L-1+KT 0.1 mg·L-1两种激素组合诱导初生愈伤后,才能胚胎发生。新陆早42号在IBA 1.0 mg·L-1+KT 0.5 mg·L-1培养基上46 d就开始胚胎发生;新陆早33号则不能直接胚胎发生,需继代到MSBP培养基上培养48 d才有胚胎发生。经2,4-D 0.1 mg·L-1+KT 0.1 mg·L-1组合培养的愈伤均需要继代到MSBP培养基上培养才能胚胎发生,新陆早42号和新陆早33号胚胎发生的最早时间分别是71 d和81 d。胚性愈伤在铺有滤纸的MSBF培养基上分化成胚并发育成再生植株。新陆早42号在140 d有根系发育良好的能嫁接植株(株高 7~8 cm),而新陆早33需180 d。即成功建立了新陆早42号的再生体系,且其胚胎发生能力和再生能力均优于对照。  相似文献   

6.
The suitability of different protocols was compared for entire plant regeneration by somatic embryogenesis, of the forage plants Lolium multiflorum Lam. (Italian ryegrass) and Festuca arundinacea Schreb. (tall fescue). In the first protocol, miniature embryos were used as starting material, while mature seeds were retained in the other two. Whichever the considered protocol, undifferentiated calli were produced on Murashige and Skoog MS medium supplemented with 2,4-D. The calli were subcultured in the dark on solid MS agar medium, containing 5 mg/1 2,4-D (protocol 2) or on solid MS medium followed by transfer to a rotated liquid MS medium with 2 mg/1 2,4-D (protocol 1). In these conditions, induction of somatic embryogenesis occurred, and whole plants were regenerated during a limited lapse of time, upon transfer in the light, to MS medium supplemented with BAP but devoid of 2,4-D. The simultaneous elimination of 2,4-D and transfer to light appeared essential for full regeneration of the plants. Using this characteristic, an additional step was added to a new protocol (protocol 3) in which microcalli, cultured on liquid MS medium containing 5 mg/1 2,4-D, were transferred to the same medium with 2 mg/1 2,4-D, in the dark. In these conditions, the suspensions kept their embryogenic potential for months. In all cases, plantlets were successfully transferred into the soil. An evaluation of the somaclonal variation potential of the plants issued from each protocol is now underway.  相似文献   

7.
甘薯胚性细胞悬浮培养系的建立   总被引:5,自引:0,他引:5  
地甘薯胚性细胞悬浮增减系的进行了研究。将12个基因的长约0.5mm的茎尖培养在含有0.2mg/L或2.0mg/L2,4-D的MS培养基上,形成了胚性愈伤组织。胚性愈伤组织的形成率因基因型和2,4-D深度不同而很大差异,为0-75.7%。一方面,将胚性愈伤组织继续增减在含有2,4-D的MS培养基上,它们形成了处于各发育时期的体细胞胚。将具有体细胞胚的胚性愈伤组织转移到MS基本培养基上,体细胞胚发育成  相似文献   

8.
Summary Callus growth and its subsequent regeneration into complete plantlets was achieved from in vitro cultured anthers ofBrassica nigra (L.)Koch. Callus was induced on a modified N6 medium containing trace elements, organics of B5 medium and 2 mg/l 2,4-dichlorophenoxyacetic acid (2,4-D). Morphogenesis of callus in the form of shoots on MS medium containing indole-3-acetic acid (IAA) and N6-benzyladenine (BA) 0.5 mg/l each and embryoids on MS medium containing 0.5–1.0 mg/l IAA and 3.0–5.0 mg/l BA could be accomplished. Chromosomal analysis revealed presence of 41% haploids (n=8) amongst the regenerated plants.  相似文献   

9.
The effect of in planta TIBA and L-proline onin vitro seedlings and cell culture of sugar beet was investigated. Sterilized seeds were grownin vitro on 1/2 MS medium supplemented with 0 or3 mg/l TIBA. Calli obtained on young leaves cultured on MS medium containing 1 mg/l BAP, were used for the initiation of cell suspension cultures using MS basal composition supplemented with 0 or 50 mM proline. Aliquots of 1 ml from cell suspension culture were inoculated onto the first somatic embryo induction MS medium containing TIBA 0.5 mg/l, BAP 1.0 mg/l, and proline at 0 or 50 mM. After three weeks of culture, embryogenic calli were transferred to the second embryo induction medium supplemented with NAA and BAP at 0.2 and 0.5 mg/l, respectively. The frequency of somatic embryos of calli obtained from in plantaTIBA together with proline treatments on average was20 which was higher than that of the other treatments. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

10.
新陆早32号、33号的体细胞胚胎发生和植株再生比较研究   总被引:6,自引:5,他引:1  
以新疆主栽品种新陆早32号、33号和对照YZ1为研究材料,通过不同浓度的激素组合成功诱导获得了体细胞胚,并进一步发育成苗.研究发现,所用的12种激素组合均能有效诱导愈伤组织.虽然IBA+KT组合有利于诱导YZ1和新陆早33号的快速分化,但在增殖生长过程中体细胞胚容易褐化、死亡:在2,4-D+KT组合中,0.1 mg·L...  相似文献   

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