類核體
类核体(英語:)又稱核形體,是在隐藻[1] 和綠蛛網藻(屬有孔蟲界)[2]叶绿体内的结构,位於其內外膜結構(periplastidial compartment)之間,為次級內共生中內共生體細胞核的殘跡。這兩類生物的葉綠體皆有四層膜,是由一個真核生物吞噬原核生物形成葉綠體後,再被另一個真核生物吞噬而來[3][4]。類核體中也具有DNA(類核體基因組),但均已大幅退化縮減,例如蓝隐藻的類核體基因組已在2001年被定序,長度僅有551kb,只保留了513個基因[5];Bigelowiella natans(一種綠蛛網藻)的類核體基因組則在2006年被定序,僅長373kb,包含331個基因。序列分析顯示隱藻的類核體來自紅藻,綠蛛網藻的類核體則來自綠藻[2]。
相關結構
某些雙鞭毛蟲(Durinskia baltica與Kryptoperidinium foliaceum,合稱dinotoms)的葉綠體來自矽藻,為三級內共生的產物,且其中尚存細胞核與粒線體,因此其細胞中同時含有來源不同的兩種粒線體[6]。
參考文獻
- Lane, C. E.; Van Den Heuvel, K.; Kozera, C.; Curtis, B. A.; Parsons, B. J.; Bowman, S.; Archibald, J. M. . Proceedings of the National Academy of Sciences. 2007, 104 (50): 19908–19913. Bibcode:2007PNAS..10419908L. PMC 2148396 . PMID 18077423. doi:10.1073/pnas.0707419104.
- Gilson, P. R.; Su, V.; Slamovits, C. H.; Reith, M. E.; Keeling, P. J.; McFadden, G. I. . Proceedings of the National Academy of Sciences. 2006, 103 (25): 9566–9571. Bibcode:2006PNAS..103.9566G. PMC 1480447 . PMID 16760254. doi:10.1073/pnas.0600707103.
- Archibald, J.M.; Lane, C.E. . Journal of Heredity. 2009, 100 (5): 582–90. PMID 19617523. doi:10.1093/jhered/esp055.
- Reyes-Prieto, Adrian; Weber, Andreas P.M.; Bhattacharya, Debashish. . Annual Review of Genetics. 2007, 41 (1): 147–68 [2021-04-29]. PMID 17600460. doi:10.1146/annurev.genet.41.110306.130134. (原始内容存档于2020-07-28).
- Archibald, John M. . BioEssays. 2007, 29 (4): 392–402. PMID 17373660. doi:10.1002/bies.20551.
- Imanian B, Pombert JF, Dorrell RG, Burki F, Keeling PJ. . PLoS One. 2012, 7 (8): e43763. PMC 3423374 . PMID 22916303. doi:10.1371/journal.pone.0043763.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.