逆转座子是大麦对抗干旱的武器？
他们研究了一个山谷南北切面的野生植株，发现一个大麦中常见的逆转座子的分布是不均匀的，越是干旱，生存条件恶劣的地区，BARE-1的拷贝数就越多，而在生存压力越大的区域，植株的基因组也越大，而基因组的扩大的部分原因被认为是的跳动所引起。
他们通过分析逆转座子在基因组上跳动留下的痕迹，LTR完成了这项研究。
这项饶有兴趣的研究使我们想到，难道植株在恶劣的环境下，基因组越大越利于生存?而逆转座子正是帮助宿主渡过难关的帮手吗?
我们已知的是植株在潮湿阴冷的地区细胞分裂是较快的，而更大的基因组意味着更大的细胞，更慢的分裂周期，生存周期，乃至更长的寿命吗?
Hordeum spontaneum (wild barley) growing on
‘Evolution Canyon’, Lower Nahal Oren, Mount Carmel, Israel.Image courtesy of Professor Eviatar Nevo, Institute of Evolution,University of Haifa, Israel.
相关文章:
Original research paper
Kalender, R., Tanskanen, J., Immonen, S., Nevo, E.
& Schulman, A. H. Genome evolution of wild barley (Hordeum
spontaneum) by BARE-1 retrotransposon dynamics in response to sharp
microclimatic divergence. Proc. Natl Acad. Sci. USA 97, 6603–6607 (2000). [PubMed]
Further reading
Wendel, J. F. & Wessler, S. R. Retrotransposon-mediated
genome evolution on a local ecological scale. Proc. Natl Acad. Sci.
USA 97, 6250-6652 (2000).
Turpeinen, T., Kulmala, J. & Nevo, E. Genome size
variation in Hordeum spontaneum populations. Genome 42, 1094–1099 (1999). [PubMed]
Vicient, C. M. et al. Retrotransposon BARE-1 and its
role in genome evolution in the genus Hordeum. Plant Cell 11,1769–1784 (1999). [PubMed]
Background reading
Alberts, B. et al. Some Transposable Elements Are Close
Relatives of Retroviruses in Molecular Biology of the Cell 3rd edn (Garland Publishing, Inc., 1994). [PubMed]
Alberts, B. et al. Other Transposable Elements Transfer
Themselves Directly from One Site in the Genome to Another in
Molecular Biology of the Cell 3rd edn (Garland Publishing, Inc.,1994).
新思路
新技术—其他文章, 百拇医药
他们通过分析逆转座子在基因组上跳动留下的痕迹，LTR完成了这项研究。
这项饶有兴趣的研究使我们想到，难道植株在恶劣的环境下，基因组越大越利于生存?而逆转座子正是帮助宿主渡过难关的帮手吗?
我们已知的是植株在潮湿阴冷的地区细胞分裂是较快的，而更大的基因组意味着更大的细胞，更慢的分裂周期，生存周期，乃至更长的寿命吗?
Hordeum spontaneum (wild barley) growing on
‘Evolution Canyon’, Lower Nahal Oren, Mount Carmel, Israel.Image courtesy of Professor Eviatar Nevo, Institute of Evolution,University of Haifa, Israel.
相关文章:
Original research paper
Kalender, R., Tanskanen, J., Immonen, S., Nevo, E.
& Schulman, A. H. Genome evolution of wild barley (Hordeum
spontaneum) by BARE-1 retrotransposon dynamics in response to sharp
microclimatic divergence. Proc. Natl Acad. Sci. USA 97, 6603–6607 (2000). [PubMed]
Further reading
Wendel, J. F. & Wessler, S. R. Retrotransposon-mediated
genome evolution on a local ecological scale. Proc. Natl Acad. Sci.
USA 97, 6250-6652 (2000).
Turpeinen, T., Kulmala, J. & Nevo, E. Genome size
variation in Hordeum spontaneum populations. Genome 42, 1094–1099 (1999). [PubMed]
Vicient, C. M. et al. Retrotransposon BARE-1 and its
role in genome evolution in the genus Hordeum. Plant Cell 11,1769–1784 (1999). [PubMed]
Background reading
Alberts, B. et al. Some Transposable Elements Are Close
Relatives of Retroviruses in Molecular Biology of the Cell 3rd edn (Garland Publishing, Inc., 1994). [PubMed]
Alberts, B. et al. Other Transposable Elements Transfer
Themselves Directly from One Site in the Genome to Another in
Molecular Biology of the Cell 3rd edn (Garland Publishing, Inc.,1994).
新思路
新技术—其他文章, 百拇医药
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