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Coverslips

Company: Knittel
Catalog#: MS0009
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Production and Bioassay of a Diffusible Factor that Induces Gametophyte-to-Sporophyte Developmental Reprogramming in the Brown Alga Ectocarpus
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2020-09-20
[Abstract]  The brown alga Ectocarpus has a haploid-diploid life cycle that involves alternation between two multicellular generations, the sporophyte and the gametophyte. Life cycle generation is not determined by ploidy but by a genetic system that includes two different three amino acid loop extension homeodomain transcription factors called OUROBOROS and SAMSARA. In addition, sporophytes have been shown to secrete a diffusible factor into the medium that can induce gametophyte initial cells to switch from the gametophyte to the sporophyte developmental program. The protocol presented here describes how to produce sporophyte-conditioned medium containing the diffusible sporophyte-inducing factor and how to assay for activity of the factor using a meio-spore-based bioassay. The protocol, ... [摘要]  [摘要 ] 褐藻赤藓皮果的单倍体-二倍体生命周期涉及孢子体和配子体两个多细胞世代之间的交替。生命周期的产生不是由倍性决定的,而是由一个遗传系统决定的,该遗传系统包括两个不同的三个氨基酸环延伸同源域转录因子,称为OUROBOROS和SAMSARA。另外,已经显示孢子体将可扩散因子分泌到培养基中,该因子可诱导配子体初始细胞从配子体转换为孢子体发育程序。该协议呈现这里描述了如何以产生含有扩散孢子体诱导因子孢子体条件培养基,以及如何测定用于使用该因子的活性杜梅尤-spore基于生物测定。该协议描述了如何优化这些程序的几个步骤,将为将来的工作提供有用的工具,旨在表征可扩散因素并研究其作用方式。

[背景 ] 水云是已被采纳为这个组的海藻遗传模型生物体一个小的,丝状褐藻(彼得斯等人,2004; Coelho的等人,2012A) 。褐藻显示出广泛的不同生命周期(Cock 等,201 4 )。腕果具有单倍体-二倍体的生命周期(图1),涉及两个多细胞世代,配子体和孢子体之间的交替(Müller,1967; Bothwell ...

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