当前位置: X-MOL 学术Cytogenet. Genome Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Chromosomal Mapping of Rex Retrotransposons in Tambaqui (Colossoma macropomum Cuvier, 1818) Exposed to Three Climate Change Scenarios
Cytogenetic and Genome Research ( IF 1.7 ) Pub Date : 2019-01-01 , DOI: 10.1159/000502926
Alex M Viana Ferreira , Leandro Marajó , Daniele A Matoso , Leila B Ribeiro , Eliana Feldberg

Greenhouse gas emissions are known to influence the planet's temperature, mainly due to human activities. To allow hypothesis testing, as well as to seek viable alternatives for mitigation, the Intergovernmental Panel on Climate Change (IPCC) suggested 3 main scenarios for changes projected for the year 2100. In this paper, we subjected Colossoma macropomum Cuvier, 1818 (tambaqui) individuals in a microcosm to IPCC scenarios B1 (mild), A1B (intermediate), and A2 (extreme) to test possible impacts on their genome. We found chromosome heterochromatinization in specimens exposed to the A2 scenario, where terminal blocks and interstitial bands were detected on several chromosome pairs. The behavior of Rex1 and Rex3 sequences differed between the test scenarios. Hybridization of Rex1 resulted in diffuse signals which showed a gradual increase in the tested scenarios. For Rex3, an increase was observed in the A2 scenario with blocks on several chromosomes, some of which coincided with heterochromatin. Heterochromatinization is an epigenetic process, which may have occurred as a mechanism for regulating Rex3 activity. The signal pattern of Rex6 did not change, suggesting that other mechanisms are acting to regulate its activity.

中文翻译:

暴露于三种气候变化情景下的Tambaqui(Colossoma macropomum Cuvier,1818)中Rex逆转录转座子的染色体图谱

众所周知,温室气体排放会影响地球的温度,主要是由于人类活动。为了进行假设检验并寻求可行的缓解替代方案,政府间气候变化专门委员会 (IPCC) 提出了 2100 年预测变化的 3 种主要情景。在本文中,我们对 Colossoma macropomum Cuvier, 1818 (tambaqui) 进行了测试IPCC 情景 B1(轻度)、A1B(中度)和 A2(极端)的缩影中的个体,以测试对其基因组的可能影响。我们在暴露于 A2 情景的标本中发现染色体异染色质化,其中在几个染色体对上检测到终端块和间质带。Rex1 和 Rex3 序列的行为在测试场景之间有所不同。Rex1 的杂交导致扩散信号,在测试场景中显示出逐渐增加。对于 Rex3,在 A2 情景中观察到增加,在几个染色体上有块,其中一些与异染色质重合。异染色质化是一种表观遗传过程,它可能作为调节 Rex3 活性的机制发生。Rex6 的信号模式没有改变,表明其他机制正在发挥作用以调节其活动。
更新日期:2019-01-01
down
wechat
bug