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Boric acid

硼酸

Company: Sigma-Aldrich
Catalog#: 31146
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Isolating and Measuring the Growth and Morphology of Pro-embryogenic Masses in Araucaria angustifolia (Bertol.) Kuntze (Araucariaceae)
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Date:
2016-12-05
[Abstract]  Embryogenic suspension cultures of Araucaria angustifolia (Bertol.) Kuntze (Araucariaceae) can be used as a model to test the effects of compounds added to the culture medium on the cellular growth and morphology of Pro-Embryogenic Masses (PEMs). PEMs are formed by embryogenic and suspensor-type cells. To measure changes in the cellular growth of embryogenic cultures, we performed sedimented cell volume (SCV) quantification, which is a non-destructive method. Morphological analysis by microscopy allowed for the observation of growth and development of PEMs and the alterations in embryogenic and suspensor-type cells. The methods used here provide an efficient means for monitoring the cellular growth of PEMs and identifying morphological changes during the development of ... [摘要]  可以使用南洋杉(Araucaria angustifolia)(Bertol。)Kuntze(Araucariaceae)的胚胎悬浮培养物作为模型来测试添加到培养基中的化合物对前胚胎形成质量的细胞生长和形态的影响PEM)。 PEM由胚胎形成和悬浮细胞形成。为了测量胚胎发生培养物的细胞生长的变化,我们进行沉降细胞体积(SCV)定量,其是非破坏性方法。通过显微镜进行的形态学分析允许观察PEM的生长和发育以及胚胎形成和悬浮体型细胞的改变。这里使用的方法提供了一个有效的手段监测PEM的细胞生长和识别胚胎发育培养发展过程中的形态变化。这些研究还可以与生物化学和分子分析例如蛋白质组学结合,以进一步研究胚胎生长和形态。
关键词:体细胞胚胎发生,大小,沉淀细胞体积
< br=""> [背景] Silveira 等。 (2006)使用SCV测量来分析外源多胺对A的形态学变化的影响。 angustifolia PEMs和Osti等人 。 (2010)测试不同一氧化氮供体对细胞生长和PEM形态的影响。最近,Douétts-Peres等人。 ...

Axenic Cultivation of Mycelium of the Lichenized Fungus, Lobaria pulmonaria (Peltigerales, Ascomycota)
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Date:
2015-07-05
[Abstract]  Lichens are symbiotic organisms consisting of a fungal partner (the mycobiont) and one or more algal or cyanobacterial partners (the photobiont); moreover lichen thalli comprise a plethora of epi- and endobiotic bacteria and non-lichenized fungi. Genetic markers are the most promising tools for the study of fungal diversity. However, applying genetic methods to intimately admixed symbiotic organisms typically requires the development of species-specific genetic markers, since DNA extraction from environmental specimens implicates the acquirement of total DNA of all symbionts and their cohabitants. While the cultivation of the alga is straight forward, the axenic cultivation of lichen-forming fungi is more difficult due to their very slow growth, as compared with the majority of ... [摘要]  地衣是由真菌伴侣(分枝杆菌)和一个或多个藻类或蓝藻合作伙伴(photobiont)组成的共生生物;此外,地衣thalli包括过多的表皮和内生菌和非地衣真菌。遗传标记是真菌多样性研究最有希望的工具。然而,将遗传方法应用于紧密混合的共生生物通常需要开发物种特异性遗传标记,因为从环境样品中提取DNA涉及获得所有共生体及其同居者的总e DNA。虽然藻类的培养是直接的,但是与大多数非地衣类群相比,由于其生长非常缓慢,形成地衣的真菌的无性繁殖更加困难,并且在内部存在腐生,内生和寄生真菌地衣thallus。此外,形成地衣的真菌(主要是子囊菌,少数担子菌)是营养不良的生物,因此适应营养不良的条件;在营养丰富的培养基中,如通常用于大规模生产快速生长的腐生真菌的无菌培养中,它们经常自动毒害。大多数形成地衣的真菌不是专性生物营养的,因此可以在非共生状态下培养。
在这里,我们提出了一种用于分离形成地衣的子囊菌无菌培养和作为纯真菌DNA来源的菌丝体培养。我们描述从发芽子囊孢子在琼脂平板上的无菌培养的开始,并解释在液体培养基中的体外生长的优化。通过研磨几个密集的,只有离心生长的真菌菌落,用匀浆器,我们获得许多较小的,生长良好的菌落,因此更高量的菌丝体用于DNA或RNA分离(Honegger和Bartnicki-Garcia,1991)。

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