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荔枝愈伤组织诱导及其体细胞胚胎发生研究初报 总被引:6,自引:0,他引:6
分别取元红荔枝盛花后45d未败育的幼胚、一个月龄的实生苗叶片、成龄树叶片、未受精子房接种在愈伤组织诱导培养基上,均能诱导出愈伤组织,但仅有幼胚能诱导出胚性愈伤组织。幼胚在含5% 蔗糖的MS基本培养基附加2,4-D2mg/L+水解乳蛋白500mg/L的培养基上诱导率最高。幼胚愈伤组织在含5% 蔗糖的基本培养基附加10% 椰乳的培养基上,白色胚状体发生率最高。胚状体易提前萌发,仅抽生根不抽生茎。健壮的未生根胚状体在含5% 蔗糖的培养基附加BA1mg/L的培养基上生根率最低,为理想的萌发培养基。随着BA浓度的降低,生根率提高,呈负相关。同浓度BA抑制生根的效果好于KT。在萌发培养基上生长一段时期后,少数较成熟的胚状体抽生出茎叶,长成完整植株。 相似文献
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龙眼胚性愈伤组织的高频率体细胞胚胎发生 总被引:27,自引:5,他引:27
比较了龙眼不同类型胚性愈合伤组织,品种,蔗糖质量浓度,有机附加物,生长调节剂,光照度等因素对龙眼胚性愈组织体胚诱导的影响,结果表明,在优经的体胚发生条件下,选择适宜的胚性愈伤组织类型,可获得龙眼胚性愈伤组织的高频率体细胞胚胎发生,在低质量浓度蔗糖(≤30g.L^-1)和黑暗条件下,松散型胚性愈伤组织的体胚分化频率为100%,并且发生数量可达每克1万个左右。 相似文献
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水稻体细胞愈伤组织抗寒性鉴定方法初探 总被引:1,自引:2,他引:1
选用抗寒性强弱不同的粳稻品种30份,进行胚及幼穗(0.5—1.0cm)体细胞组织培养。结果表明:来自不同品种的体细胞愈伤组织的净生长量,不仅在不同品种之间有明显差异,而且在继代培养中具有相对的稳定性;在15℃低温下继代培养的成熟胚愈伤组织净生长量与品种孕穗期的扰寒性无关,幼穗体细胞愈伤组织的净生长量与品种的抗寒性呈显著的正相关;将愈伤组织在15℃下培养25天,可作为愈伤组织抗寒性的鉴定方法,其净生长量可作为抗寒性鉴定的指标。 相似文献
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以楤木幼茎及根为试材,添加不同种类和浓度的激素,进行愈伤组织诱导、胚状体发生及幼苗 分化。结果显示,幼茎在MS 2,4-D1.0mg/L培养基上愈伤组织诱导率最高。愈伤组织在MS BA1.0 mg/L NAA0.04 mg/L培养基上胚状体形成最多,幼苗分化率达92.5%,并能保持旺盛的再生能力。 相似文献
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水稻愈伤组织诱导分化的研究简报 总被引:1,自引:0,他引:1
用 MS 培养基加激素2.4-D 培养水稻种子,诱导出愈伤组织.愈伤组织呈浅黄色、质地疏松(主要从胚诱导而来),或呈白色、质地稍紧(主要从米粒来).再用 MS 培养基加激素 IAA、6-BA进行培养,从愈伤组织诱导出完整植株。 相似文献
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[目的]提高湿地松(Pinus elliottii E.)体细胞胚胎发生过程中胚性愈伤组织的诱导能力,优化胚性愈伤组织的诱导培养条件,建立稳定高效的湿地松胚性愈伤组织诱导培养技术体系.[方法]以湿地松未成熟合子胚作为外植体,探究基因型、球果采集日期、植物生长调节剂和碳源等因子对湿地松胚性愈伤组织诱导的影响;观察和划分湿地松合子胚的发育阶段,并测定不同发育阶段的合子胚的生长素(IAA)、细胞分裂素(ZR)、脱落酸(ABA)和赤霉素(GA3)含量,探究合子胚发育过程中内源激素含量的动态变化.[结果]内因和外因等因素对胚性愈伤组织诱导均有显著或极显著影响,通常7月中上旬是采集湿地松球果的最佳时期,选取处于2~4阶段即多胚头、裂生多胚和球形胚发育阶段的合子胚作为诱导材料,胚性愈伤组织诱导率较高;以16号基因型的湿地松球果的未成熟合子胚为材料,能够稳定保持较高的胚性愈伤组织诱导率.在DCR基本培养基中添加2.2 mg/L激动素(KT)+2.2 mg/L 2,4-二氯苯氧乙酸(2,4-D)+2.2 mg/L 6-苯甲基腺嘌呤(6-BA)为湿地松胚性愈伤组织诱导的最佳植物生长调节剂浓度组合;如以1.5 g/L松三糖代替蔗糖作为碳源,16号基因型球果的胚性愈伤组织诱导率可达40%.此外,通过观察合子胚发育过程中内源激素含量的动态变化,推测合子胚内源脱落酸(ABA)对胚性愈伤组织的诱导有重要调控作用.[结论]本研究得到了较为稳定高效的湿地松胚性愈伤组织诱导培养技术体系,为进一步建立完整高效的湿地松体细胞胚胎发生和植株再生体系提供依据. 相似文献
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Soybean somatic cell could induce the development of embryoid which was similar to embryo morphologically and structurally. Somatic embryo-genesis system of soybean was used to conduct genetic transformation of soybean because of its several advantages such as higher transformational efficiency, beetter synchronism and fewer plant chimeras among transgenic plants. After infected with agrobacterium tumefaciens,the initiation, differentiation and de-velopment of young cotyledon embryogenic cell of soybean which was cultured on selective culture medium with kanamycin were investigated through histo-logical study. The resuh showed that somatic embryo was differentiated in non-bud differentiation way. The embryogenic coils were differentiated from epi-dermis of explant or cells in 1 layer or 2 layers, with the division of embryogenic cells and degradation and disorganization of surrounding cells, the embryo-genic cells would form embryoid with analogous suspensor structure, later, globular embryoid would extrude from epidermis then developed into heart-shape embryo. The experiment was expected to provide theoretical reference for the construction of high transformational system of using plant somatic embryogene-sis induced by young cotyledon of soybean. 相似文献
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《(《农业科学与技术》)编辑部》2008,(2)
Soybean somatic cell could induce the development of embryoid which was similar to embryo morphologically and structurally. Somatic embryogenesis system of soybean was used to conduct genetic transformation of soybean because of its several advantages such as higher transformational efficiency,beetter synchronism and fewer plant chimeras among transgenic plants. After infected with agrobacterium tumefaciens,the initiation,differentiation and development of young cotyledon embryogenic cell of soybean which was cultured on selective culture medium with kanamycin were investigated through histological study. The result showed that somatic embryo was differentiated in non-bud differentiation way. The embryogenic cells were differentiated from epidermis of explant or cells in 1 layer or 2 layers,with the division of embryogenic cells and degradation and disorganization of surrounding cells,the embryogenic cells would form embryoid with analogous suspensor structure.Later,globular embryoid would extrude from epidermis then developed into heart-shape embryo.The experiment was expected to provide theoretical reference for the construction of high transformational system of using plant somatic embryogenesis induced by young cotyledon of soybean. 相似文献
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Histological Study on Soybean Somatic Embryogenesis 总被引:4,自引:0,他引:4
ZHAO Gui-lan YANG Xiang-dong GUO Dong-quan HU Zan-min. Biotechnology Research Center Jilin Academy of Agricultural Sciences Changchun 《(《农业科学与技术》)编辑部》2008,(2)
Soybean somatic cell could induce the development of embryoid which was similar to embryo morphologically and structurally. Somatic embryogenesis system of soybean was used to conduct genetic transformation of soybean because of its several advantages such as higher transformational efficiency,beetter synchronism and fewer plant chimeras among transgenic plants. After infected with agrobacterium tumefaciens,the initiation,differentiation and development of young cotyledon embryogenic cell of soybean which was cultured on selective culture medium with kanamycin were investigated through histological study. The result showed that somatic embryo was differentiated in non-bud differentiation way. The embryogenic cells were differentiated from epidermis of explant or cells in 1 layer or 2 layers,with the division of embryogenic cells and degradation and disorganization of surrounding cells,the embryogenic cells would form embryoid with analogous suspensor structure.Later,globular embryoid would extrude from epidermis then developed into heart-shape embryo.The experiment was expected to provide theoretical reference for the construction of high transformational system of using plant somatic embryogenesis induced by young cotyledon of soybean. 相似文献
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【目的】越南紫薯〔Ipomoea batatas(L.)Lam〕品质优良,薯块均匀,商品性好,但产量偏低,产量性状亟待遗传改良,体细胞胚胎发生是快速繁殖和保持种性稳定的基础,对紫薯的遗传改良有重要意义。采用激素处理越南小紫薯外植体,研究越南紫薯的体细胞胚胎再生途径,为通过体细胞无性系变异筛选紫薯高产优质新材料提供新方法。【方法】以市场销售的越南紫薯为材料,以叶片和茎段作外植体,探讨植物生长调节物质种类(6-BA、NAA、2,4-D、ABA)及配比对越南紫薯培养的影响,建立越南紫薯体细胞胚胎发生及再生植株体系。【结果】叶片和茎段诱导愈伤组织培养基相同,难易程度一致,诱导配方为 MS+6-BA 1.0 mg/L + NAA 0.2 mg/L;在普通愈伤组织诱导形成胚性愈伤组织过程中,2,4-D 起重要作用,其他激素起辅助作用,较好的诱导配方为 MS+6-BA 0.1 mg/L + 2,4-D 2.0 mg/L;在胚性愈伤组织诱导产生体细胞胚过程中,ABA 起着重要作用,并进一步发育和分化的适宜的培养基为 MS+6-BA 0.1 mg/L + NAA 0.2 mg/L + ABA 0.5 mg/L。【结论】叶片和茎段愈伤组织诱导最佳培养基为 MS+6-BA 1.0 mg/L+0.2 mg/L NAA,愈伤组织转化为胚性愈伤最佳培养基为 MS+6-BA 0.1 mg/L +2,4-D 2.0 mg/L;胚性愈伤形成体细胞胚胎最佳培养基为 MS+6-BA 0.1 mg/L + NAA 0.2 mg/L + ABA 0.5 mg/L。 相似文献
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大豆体细胞可以诱导发生在形态和结构上类似胚结构的胚状体。利用大豆体细胞胚发生系统进行大豆遗传转化,具有转化频率高、同步性好、转基因植株嵌合体少等诸多优点。对经根癌农杆菌侵染后,在含卡那霉素筛选培养基上生长的大豆未成熟子叶胚性细胞的发生、分化及发育进行了组织学研究。结果表明,体细胞胚以非芽体方式发生。胚性细胞可以从外植体表层或表层下1-2层细胞开始发生。随着胚性细胞的分裂,周围细胞开始退化解体,并形成具有类似胚柄结构的胚状体。之后,呈球形的胚状体突出于表皮之外,并依次发育成心形胚、鱼雷形胚和子叶形胚。以期为利用大豆未成熟子叶诱导体细胞胚发生系统高效转化体系的建立提供理论依据。 相似文献
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油棕体细胞胚的诱导和次生胚的增殖研究 总被引:1,自引:0,他引:1
油棕体细胞胚的诱导是油棕体胚发生技术体系中最关键的培养过程,通过建立油棕次生胚增殖培养方法可有效地实现油棕组培苗快速的增殖繁育。本研究通过系统的对油棕体细胞胚发生及次生胚再生途径中若干影响因子的比较研究,建立油棕体细胞胚和次生胚再生体系。结果表明:油棕体细胞胚再生体系在不同基因型的油棕品种内诱导率存在较大差别,其中植物外源激素二氯苯氧乙酸(2,4-D)对油棕胚诱导效果较好;油棕次生胚增殖在不同基因型的油棕品种内差异不显著,木本植物培养基(WPM)在油棕次生胚增殖中培养效果最好。 相似文献
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成雄鹰 《浙江大学学报(农业与生命科学版)》1991,(1)
在改良MS培养基上从5个大豆品种成熟种子来源的幼苗未展开叶片上诱导出愈伤组织,利用2个月月龄的这些愈伤组织在摇床上建立了细胞悬浮培养系,细胞悬浮培养系每1至2周转培1次,并用于原生质体分离,转培后3到5天的细胞经酶解后原生质体的产量最高,纯化后的原生质体用3种方法进行培养,即液体培养法、琼脂包埋法和琼脂底层法,在琼脂底层法中,培养皿底层先浇上无甘露醇的琼脂培养基,而原生质体则悬浮在2到4毫升含0.45 mol甘露醇的培养基中,3种方法以琼脂底层法最佳,原生质体在培养后2到3天内能见到第1次细胞分裂,在适当的条件下1周内高达80%的原生质体发生分裂,置板频率一般在40%到60%之间,5个供试品种中4个的原生质体愈伤组织在固体和液体培养中出现体细胞胚胎发生,在液体培养条件下得到了大量子叶和胚根发育良好的体细胞胚,但由于这些胚未进一步萌发,故未能得到完整的再生植株。 相似文献