共查询到20条相似文献,搜索用时 93 毫秒
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采用生物信息学工具及网络资源,对已在GenBank上注册的玉米、小麦、芝麻、菜豆、海茄冬、红三叶等植物的肌醇-1-磷酸合成酶的核酸及氨基酸序列进行分析,并对其组成成分、导肽、跨膜结构域、疏水性/亲水性、分子系统进化关系、蛋白二级及三级结构等进行预测及推断。结果表明:植物肌醇-1-磷酸合成酶在进化过程中非常保守,且可能为定位于细胞质的亲水性蛋白;结构预测表明不同来源的MIPS蛋白尽管在结构上有所差异,但是其催化位点及NAD+结合区基本一致,具有较强的保守性。 相似文献
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植物组织培养实验的教学实践 总被引:1,自引:0,他引:1
针对新课程标准中的植物组织培养实验,介绍一种简便、适合高中生物学实验教学的山芋组织培养方法。详细介绍了母液、培养基的配制方法及配制和保存过程中的注意事项、各种激素的配方和培养基的配制中各个环节,从外植体的选取、清洗及接种各环节详细阐述了无菌营养物初代建立的关键技术。 相似文献
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植物组织培养技术具有巨大的应用价值,传统组织培养存在许多缺点,许多学者从培养基、培养容器、环境条件(光照、气体等)进行了研究和改善,取得了一定的成效。综述了这些方面的研究进展。 相似文献
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Mei-Chun Lu 《Plant Cell, Tissue and Organ Culture》2004,78(1):93-96
High frequency plant regeneration was induced from protocorm-derived callus cultured on half-strength of Murashige—Skoog medium
with 2,4-dichlorophenoxyacetic acid (2,4-D, 0–5 mg l−1) and 1-phenyl-3-(1,2,3-thiadiazol-5-yl, 0–1 mg l−1) urea (TDZ) in the dark. Twelve totipotent callus lines were selected within 76 callus lines regenerated on half-strength
of Murashige—Skoog (MS) medium with 0.5 mg l−1 TDZ. The proliferation rate was 4–5-fold in fresh weight after 30 days of culture on half-strength MS medium containing 5
mg l−1 2,4-D and 0.5 mg l−1 TDZ in the dark. The maximum number of shoot buds generated by 0.01 g callus explant was 134 after 4 months of culture. These
calli were regenerated to plantlets via protocorm-like bodies (PLBs) after 75–150 days of culture. The shoots, with two true
leaves, were transferred to hormone-free medium, rooting and eventually formed plantlets. Totipotent callus lines of Pleione formosana Hayata have been successfully established in this study. 相似文献
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目的:佛甲草(Sedum lineare Thunb)是景天科植物中具有多种药用功能的植物,其肉质多浆的特点是愈伤组织成功诱导和培养的瓶颈。方法:以佛甲草的叶和茎为外植体,用正交试验对培养基中的激素浓度(2,4-D、6-BA和Kt)进行配置,在配置的18种培养基中筛选到适合佛甲草叶和茎愈伤组织诱导和继代的培养基配方。结果:MS+3%蔗糖+2,4-D2+Kt1和MS+3%蔗糖+2,4-D2+6-BA1培养基对茎和叶愈伤组织的诱导率分别达到70%和80%左右,而MS+3%蔗糖+2,4-D2+6-BA1更有利于佛甲草愈伤组织的继代培养。结论:在愈伤组织培养中,佛甲草的茎和叶都可以作为优良的外植体进行愈伤组织的诱导和培养。实验结果为进一步通过组织培养手段提高佛甲草的药效成分提供了有益参考。 相似文献
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植物愈伤组织培养中内外源激素效应的研究现状与展望 总被引:10,自引:0,他引:10
综述了外源激素对愈伤组织诱导、分化的影响,以及内源激素在愈伤组织培养过程中的变化规律。有关愈伤组织培养中外源激素作用的研究日趋细化,而激素变化与适宜继代周期的关系已成为研究热点。随着分子生物学与同位素标记等技术的引入,必将促进愈伤组织培养中激素相关基因调控机理的揭示,以及激素作用位点的精确定位,从而推动植物愈伤组织培养的迅猛发展。 相似文献
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活性碳对培养基中植物生长调节物质的吸附作用 总被引:5,自引:0,他引:5
植物组织和细胞培养中经常使用活性碳(Johansson等1982,Fridborg和Eriksson 1975,Smith 1983,Steinitz和 Yahel 1982)。一般认为活性碳通过吸附而发生作用(Fridborg和Erik-sson 1975,Kohlenbach 和 Wernicke 1978,Martineau等1981)。但关于活性碳吸附何种 相似文献
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Hormonal Regulation of the Lectin Biosynthesis in Callus Culture of the Phaseolus vulgaris Plant 下载免费PDF全文
Callus cultures established from Phaseolus vulgaris seedlings were used to investigate hormonal influence on lectin biosynthesis. The plant tissue cultures were initiated using defined levels of both a cytokinin (kinetin) and an auxin (2,4-dichlorophenoxyacetic acid) and were then transferred to media containing different amounts of these hormones. The lectin content of each callus culture was determined using an enzyme immunoassay specific for the seed lectin of the P. vulgaris plant. The lectin biosynthesis was directly affected by the levels of auxin and cytokinin in the culture media and no lectin was detected in hormone-free medium. This enabled us to compose culture media yielding a maximal or minimal lectin content of the callus cultures, illustrating the ability to induce an enhancement or suppression of the in vitro lectin biosynthesis. The lectin level of callus tissue during the growth cycle of a culture was, furthermore, related to the cellular growth rate which might indicate an involvement of the lectin in cellular events during rapid cell division. 相似文献
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利用组织培养技术提取甘草黄酮 总被引:1,自引:0,他引:1
本研究筛选了两种能快速诱导甘草疯长型愈伤组织的培养基MS5和MS7,用微波法提取甘草愈伤组织和野生甘草根中总黄酮。测定结果显示:三年生野生型胀果甘草根中总黄酮的含量约为6.02%,培养3~4周的胀果甘草愈伤组织中总黄酮的含量约为1.1%。结果表明:组织培养生产黄酮在生产效率、工厂化生产、避免季节限制、保护野生甘草资源及实际应用中更具优势。本研究可为从甘草中提取总黄酮提供一条可借鉴的途径。 相似文献