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2019-03-11 | 編輯: | 【

  多倍化或整個基因組復制事件在植物的進化過程中非常普遍,是推動植物進化的主要動力。植物早期登陸是重要的進化事件,然而早期登陸植物(以苔蘚為代表)古多倍化事件在進化中的意義尚不清楚。中國科學院新疆生態與地理研究所張道遠研究員團隊的高貝博士等針對早期登陸植物系統演化路徑以及基因組進化問題,以被子植物所特有的VOZ轉錄因子為例,解析了蘚類分支進化早期古多倍化發生事件及時間。

  研究發現,VOZ基因發生T和ρ兩種模式的早期多倍化事件,與早期的豆科植物分支及小立碗蘚的多倍化現象一致,提供了植物界進化早期突出的多倍化個例。該研究首次從單個基因進化角度,解析了從蘚類—高等植物系統進化的線索,為后續基于全基因組大數據基礎上進一步解析植物進化關系提供了一定理論支撐。

  研究結果以 Evolution by duplication: paleopolyploidy events in plants reconstructed by deciphering the evolutionary history of VOZ transcription factors 為題發表于BMC plant biology期刊上(文章鏈接)。

  此外,苔蘚植物不僅是研究植物進化的理想植物,也是抗逆基因挖掘的好材料,尤其是耐干沙漠苔蘚蘊藏著豐富且獨特的抗逆基因資源。李小雙博士等對沙漠耐干苔蘚齒肋赤蘚AP2/ERF基因家族進行了系統研究及抗逆功能鑒定,發現新的A-5類DREB基因能顯著提高轉基因擬南芥的抗旱和耐鹽性。研究結果豐富了目前研究較少的A-5類DREB基因的理論認識。研究結果分別發表在International Journal of Molecular Sciences(文章鏈接)及Genes上(文章鏈接)。

主要植物譜系中VOZ轉錄因子基因分析

銀葉真蘚中AP2/ERF家族基因的分類

ScDREB10提高了轉基因擬南芥種子在干旱和高鹽下的萌發率 

 
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