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掌叶半夏细胞悬浮培养及单细胞培养再生植株 总被引：6，自引：0，他引：6
掌叶半夏成熟胚在含２，４－Ｄ２．０ｍｇ／Ｌ，ＢＡ０．５ｍｇ／Ｌ的ＭＳ培养基上可诱导形成颗粒状胚性愈伤组织。用附加２，４－Ｄ ２．０ｍｇ／Ｌ，ＢＡ０．１ ｍｇ／Ｌ，ＣＨ３００ｍｇ／Ｌ的ＭＳ液体培养基对胚性愈伤组织进行悬浮振荡培养，经３￣４次继代培养即可得到悬浮的单细胞，其细胞多为圆形或椭圆形，具有较强的分裂能力。经测定，悬浮培养过程中细胞生长曲线呈“Ｓ”型，培养２０天时细胞数量和鲜重达到最大值；随着 相似文献
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切花月季萨曼沙组织培养微繁的研究 总被引：9，自引：0，他引：9
以切花月季萨曼沙为外植体，成功地建立了该品种无性繁殖系和高效的培养体系，在ＭＳ＋ＢＡ２ｍｇ／Ｌ和ＭＳ＋ＢＡ２ｍｇ／Ｌ＋ＩＢＡ０．１ｍｇ／Ｌ培养基上芽的诱导率均在８０％以上；在１／２ＭＳ＋ＩＡＡ１ｍｇ／Ｌ、１／２ＭＳ＋ＩＢＡ０．５ｍｇ／Ｌ及１／２ＭＳ＋ＮＡＡ０．５ｍｇ／Ｌ的培养基上，根的诱导率在８０％以上；生根试管苗经高湿度荫棚过渡锻炼后移栽成活率达９５％以上 相似文献
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大蒜发芽叶培养体细胞胚发生 总被引：5，自引：1，他引：5
将大蒜发芽叶培养于ＭＳ（１／２ＮＨ４ＮＯ３＿＋２，４－Ｄ２ｍｇ／Ｌ＋ＫＴ０．５ｍｇ／Ｌ上，形成愈伤组织。愈伤组织继代后，转移到ＭＳ（ＫＮＯ３２５２５ｍｇ／Ｌ＋（ＮＨ４）２ＳＯ４１６５０ｍｇ／Ｌ，无ＮＨ４ＮＯ３）＋ＫＴ２ｍｇ／Ｌ＋６－ＢＡ４ｍｇ／Ｌ＋Ａｄｅｎｉｎｅ２ｍｇ／Ｌ＋ＩＡＡ０．０１ｍｇ／Ｌ培养基上，２５天后，形成体细胞胚并能再生植株。其中，胚状体发生的必要条件是ＮＯ３／ＮＨ＾＋４＞１，ＫＴ／ 相似文献
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苎麻悬浮细胞原生质体培养再生植株 总被引：5，自引：0，他引：5
苎麻品种浏阳大叶绿的子叶在含有２，４－Ｄ０．５ｍｇ／Ｌ、ＫＴ０．５ｍｇ／Ｌ的ＭＳＢ固体培养基上，形成愈伤组织。愈伤组织经３￣４次继代培养后作液体振荡培养，产生悬浮细胞系。从悬浮系分离的原生质体，只有以海藻酸钠包埋方式培养在ＫＭ８Ｐ培养基中，５０天左右才能形成肉眼可见的小愈伤组织。该愈伤组织在附加２，４－Ｄ０．２ｍｇ／Ｌ、６－ＢＡ０．１ｍｇ／Ｌ的ＭＳＢ生长培养基上增殖，然后转入附加６－ＢＡ２．０ｍｇ 相似文献
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药用作物掌叶半夏组织培养及药物成份分析 总被引：8，自引：1，他引：8
药用作物掌叶半夏（ＰｉｎｅｌｌｉａｐｅｄａｔｉｓｅｃｔａＳｃｈｏｔｔ）的种子在附加２，４－Ｄ０．５－６．０ｍｇ／Ｌ＋ＢＡ０．５ｍｇ／Ｌ的ＭＳ或Ｂ５培养基上均能诱导出大量愈伤组织，但２，４－Ｄ的浓度变化对愈伤组织的形成和生长无明显影响，且无分化现象。愈伤组织生长快，分散性好，适于悬浮培养。种子在附加ＮＡＡ０．１－４．０ｍｇ／Ｌ＋ＢＡ０．５ｍｇ／Ｌ的ＭＳ培养基上均能形成愈伤组织并分化出根和芽，随ＮＡＡ 相似文献
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本文研究了ＢＲ及其与ＩＡＡ、２，４－Ｄ、ＫＴ和６－ＢＡ等配合使用对陆地棉愈伤组织诱导、继代、分化、体细胞胚胎和根器官发生的影响。ＢＲ０．０１ｍｇ／Ｌ能使陆地棉Ｃｏｋｅｒ２０１、３１２两品种分化产生胚性愈伤组织，并有效地保持该种愈伤组织的生活力和胚胎发生能力。ＢＲ０．０１ｍｇ／Ｌ＋ＩＡＡ０．５ｍｇ／Ｌ促进Ｃｏｋｅｒ２０１、３１２两品种体细胞胚胎发生，ＢＲ０．０１ｍｇ／Ｌ＋２，４－Ｄ０．０５ｍｇ／Ｌ能诱导所有供试品种产生疏松黄绿色愈伤组织，２，４－Ｄ用量逐步降低或除去后，一些品种便分化产生胚性愈伤组织或体细胞胚状体。另在ＢＲ与ＩＡＡ的某些组合中还观察到根器官的发生。 相似文献
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培养基成分对红树莓不定芽分化会产生直接影响。试验结果表明：ＢＡ与ＩＢＡ配合使用诱导不定芽分化的效果优于ＫＴ与ＩＢＡ的配合使用和ＢＡ与ＩＡＡ和ＮＡＡ的配合使用。在１／２ＭＳ大量元素＋ＢＡ１．５ｍｇ／Ｌ＋ＩＢＡ０．１ｍｇ／Ｌ分化培养基中，不定芽分化率大于８０％；当ＢＡ增加到２．０ｍｇ／Ｌ时，不定芽的分化率最高（９５．６％）；３０－５０ｇ／Ｌ的蔗糖以及ＮＨ４ＮＯ３与ＫＮＯ３的适当比例有助于红树莓不定芽的 相似文献
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棉纤维品质性状与取向参数的关系 总被引：6，自引：2，他引：4
应用ＳｐｉｎｌａｂＨＶＩ９００系统和Ｘ射线衍射强度－方位角扫描谱的多峰分离法测量了成熟棉纤维的初始模量Ｍ３．２ｍｍ隔距比强度Ｔ,２．５％跨矩长度Ｌ和微原纤螺旋角ψ微晶取向离散角α。Ｍ＝３．７３－０．０４ψ－０．０６α（Ｎ／ｔｅｘ）复相关关系ｒ＝０．７６２,Ｔ＝５８．０８－０．３０ψ－１．３３α（ｇｆ／ｔｅｘ）ｒ＝０．８７６,Ｌ＝６３．２３＋０．５７ψ－１．８８α（ｍｍ）ｒ＝０．９０５。 相似文献
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水稻灿粳杂种人工种子制备的研究 总被引：3，自引：0，他引：3
从二个水稻籼粳杂种幼穗业源的愈伤组织上，分化出大量不定芽，在２，４－Ｄ０．２ｍｇ／Ｌ，ＢＡＰ２ｍｇ／Ｌ的ＭＳ培养基上，亚优２号不定芽增殖率可达３．５，无菌条件下，以不定芽作材料制备的人工种子发芽率最高可达６０．０％，最低也可达１５．０％，使用麦芽糖代替蔗糖，以及用较大的不定芽都可提高人工种子发芽率。 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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基于RS与GIS技术,利用景观生态学理论及景观格局指数对布尔津县土地利用现状进行定量分析。结果显示为：（1）布尔津县以草地、林地为主要景观类型,镶嵌着耕地、水域等景观类型。（2）四个分区（即高山区、丘陵区、平原区、荒漠区）的林地资源组成差异明显,耕地、居民、交通及工矿用地集中分布在丘陵区和平原区（3）从各项指数来看,高山区的多样性指数较低;平原区是受人文因素最多的区域,景观优势度低,各种土地利用类型比例差异不大,有利于生态可持续发展,但要合理的开发利用;荒漠区生态环境相对脆弱,要加强生态环境的保护与改善。通过该研究对布尔津县的土地利用现状作一个了解,为该县乃至整个地区的景观规划和可持续发展战略提供科学依据。 相似文献
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Efficiency of water use of early plantings of sunflower 总被引：4，自引：0，他引：4
M. Auxiliadora Soriano Francisco Orgaz Francisco J. Villalobos Elías Fereres 《European Journal of Agronomy》2004,21(4):465-476
Rain fed crop production in Mediterranean environments depends to a large extent on strategies that avoid the intense summer drought. Early plantings of sunflower have given consistently higher yields in such environments, but the basis for such yield increases has not been explored. We conducted two field experiments at Cordoba (Spain) to investigate the effects of an early and a late planting date on the components of water-limited crop productivity; namely, water use (T), water use efficiency (TE) and harvest index (HI) of sunflower. The results were generalized by simulating rain fed sunflower yields, under early (1 January) and late (15 March) plantings, for a 25-year period with the aid of a simulation model of the Ceres type (OILCROP-SUN) which has been validated in Cordoba. Experimental seed yields of early plantings in 1989 and 1996 were 2.0 and 3.0 t ha−1, while late plantings yields were 1.3 and 2.4 t ha−1, for the 2 years. Average simulated yields were 2.7 ± 1.1 and 1.9 ± 0.7 t ha−1 for early and late plantings, respectively. For the 2 years, T of early plantings was higher than that of late plantings, but the response of TE and HI to planting date was not the same in the two experiments. In the simulation exercise, T and TE of early plantings were consistently higher than those of late plantings, while there were no differences in the HI for the two planting dates. We conclude that early plantings of sunflower increase rain fed yields by increasing both T and TE, while the impact of planting date on HI very much depends on the crop water stress pattern, which is quite variable from year to year even in the predictable Mediterranean environment. 相似文献
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The cotyledon and hypocotyl of eight varieties of alfalfa( Medicago sativa L. )are used to study the effect of different cultivation procedures and genotypes on embryogenic callus and embryoid induction,plant development and transplant of alfalfa.The varieties of alfalfa with high embryoid induction rate and high differentiation rate are screened. A high frequency regeneration system for alfalfa tissue culture is established:which is benifical to the gene transformation of alfalfa. 相似文献
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Based on the relation between the incipient yield pressure and the limit of yielding in cylinder according to the elastic disabled rule, a laboratorial method of determining limit of yielding of material is designed and a set of experimental data were gained by the method. The incipient yield pressure of the cylinder is gained by analyzing the experimental data, and then the limit of yielding is gained. The laboratorial method has a good reliability as the experimental value has a little error to the theory value. It has a definite engineering signification and theory value to research the mechanical capability of material and the disabled rule of high pressure vessel. 相似文献