| Molecular evolution and functional divergence of HAK potassium transporter gene family in rice （Oryza sativa L.） |
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| 作者姓名： | Zefeng Yang ;Qingsong Gao ;Changsen Sun ;Wenjuan Li ;Shiliang Gu ;Chenwu Xu |
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| 作者单位： | [1]jiangsu Provincial Key laboratory of Crop Genetics and Physiology, Key Laboratory of Plant Functional Genomics of Ministry of Education, Yangzhou University, Yangzhou 225009, China; [2]School of Life Sciences, Taizhou University, Linhai 317000, China |
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| 基金项目： | This,work,was,supported,by,the,National,Basic,Research,Program,of,China,the,National,Hightech,Research,and,Development,Program,the,Program,for,New,Century,Excellent,Talents,in,University,of,China |
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| 摘 要： | The high-affinity K＋ （HAK） transporter gene family is the largest family in plant that functions as potassium transporter and is important for various aspects of plant life. In the present study, we identified 27 members of this family in rice genome. The phylogenetic tree divided the land plant HAK transporter proteins into 6 distinct groups. Although the main characteristic of this family was established before the origin of seed plants, they also showed some differences between the members of non-seed and seed plants. The HAK genes in rice were found to have expanded in lineage-specific manner after the split of monocots and dicots, and both segmental duplication events and tandem duplication events contributed to the expansion of this family. Functional divergence analysis for this family provided statistical evidence for shifted evolutionary rate after gene duplication. Further analysis indicated that both point mutant with positive selection and gene conversion events contributed to the evolution of this family in rice.
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| 关 键 词： | 水稻 基因传输 遗传性 钾 |
| 收稿时间： | 7 October 2008 |
Molecular evolution and functional divergence of HAK potassium transporter gene family in rice (Oryza sativa L.) |
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| Zefeng Yang,;Qingsong Gao,;Changsen Sun,;Wenjuan Li,;Shiliang Gu,;Chenwu Xu.Molecular evolution and functional divergence of HAK potassium transporter gene family in rice (Oryza sativa L.)[J].Journal of Genetics and Genomics,2009,36(3):161-172. |
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| Authors: | Zefeng Yang Qingsong Gao Changsen Sun Wenjuan Li Shiliang Gu Chenwu Xu |
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| Institution: | 1. Jiangsu Provincial Key laboratory of Crop Genetics and Physiology, Key Laboratory of Plant Functional Genomics of Ministry of Education, Yangzhou University, Yangzhou 225009, China;2. School of Life Sciences, Taizhou University, Linhai 317000, China;1. Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Aobayama 6-6-07, Sendai 980-8579, Japan;2. Division of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, Nagano 386-8567, Japan;3. Division of Biological Sciences, Cell and Developmental Biology Section, Food and Fuel for the 21st Century Center, University of California San Diego, La Jolla, CA 92093-0116, USA;1. National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China;2. School of Life Sciences, Tsinghua University, Beijing 100084, China |
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| Abstract: | The high-affinity K+ (HAK) transporter gene family is the largest family in plant that functions as potassium transporter and is important for various aspects of plant life. In the present study, we identified 27 members of this family in rice genome. The phylogenetic tree divided the land plant HAK transporter proteins into 6 distinct groups. Although the main characteristic of this family was established before the origin of seed plants, they also showed some differences between the members of non-seed and seed plants. The HAK genes in rice were found to have expanded in lineage-specific manner after the split of monocots and dicots, and both segmental duplication events and tandem duplication events contributed to the expansion of this family. Functional divergence analysis for this family provided statistical evidence for shifted evolutionary rate after gene duplication. Further analysis indicated that both point mutant with positive selection and gene conversion events contributed to the evolution of this family in rice. |
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| Keywords: | HAK potassium transporter gene family rice functional divergence gene conversion positive selection |
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