·常規(guī)信息 最近更新:2022年12月20日 22:31:00 | |||||||||||||
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基因(座)名稱 | 高親和性鉀離子轉(zhuǎn)運(yùn)蛋白 High-Affinity Potassium Transporter | ||||||||||||
基因符號(hào) | OsHKT1;1; OsHKT4 | ||||||||||||
所在染色體 | 4 (已克隆) | ||||||||||||
OsHKT1;1(AJ491816, Jabnoune et al. 2009; LOC_Os04g51820, Wang et al. 2015, Huang et al. 2008, Xiao et al. 2022), OsHKT4(AJ491815, Garciadeblás et al. 2003), 位于同一基因位點(diǎn)... OsHKT1;1編碼一個(gè)高親和性鉀離子轉(zhuǎn)運(yùn)蛋白,產(chǎn)物也是一個(gè)低親和Na+轉(zhuǎn)運(yùn)蛋白。 【突變體表型】oshkt1;1突變體植株表現(xiàn)出對(duì)鹽脅迫超敏感,與野生型相比,突變體韌皮部汁液中含有較少的Na+,在莖部積累了較多的Na+,突變體生長(zhǎng)減弱,鮮重和莖長(zhǎng)度降低,葉綠素含量降低,恢復(fù)生長(zhǎng)7天,突變體更多苗死亡(Wang et al. 2015)。 【定位與克隆】OsHKT4 cDNA全長(zhǎng)2508bp,包含有3個(gè)外顯子,編碼一個(gè)由552氨基酸組成的蛋白產(chǎn)物。產(chǎn)物OsHKT4是一個(gè)低親和Na+ 轉(zhuǎn)運(yùn)蛋白,具有轉(zhuǎn)運(yùn)Na+的活性。 【時(shí)空表達(dá)譜】OsHKT1;1主要在葉片的韌皮部表達(dá),鹽脅迫會(huì)誘導(dǎo)它的表達(dá)上調(diào)(Wang et al. 2015)。 【亞細(xì)胞定位】細(xì)胞膜(Wang et al. 2015)。 【生物學(xué)功能】水稻通過在老葉中大量積累Na+和Cl-以保護(hù)幼葉免于離子毒害。老葉中OsHKT1;1、OsHAK10以及OsHAK16的上調(diào)可能有助于鹽脅迫時(shí)老葉中Na+的積累(Wang et al. 2012)。 OsHKT1;1在控制Na+含量以及抑制葉片中的鈉離子毒性過程中發(fā)揮作用,并受到OsMYBc轉(zhuǎn)錄因子的調(diào)控(Wang et al. 2015)。 【相關(guān)登錄號(hào)】
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·ONTOLOGY及相關(guān)基因 | |
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表型特征 | 鈉含量(TO:0000608), 鉀含量(TO:0000609), 鈉鉀含量比(TO:0000525), 耐鹽性(TO:0006001) |
分子功能 | 鈉離子跨膜轉(zhuǎn)運(yùn)蛋白活性(GO:0015081), 鉀離子跨膜轉(zhuǎn)運(yùn)蛋白活性(GO:0015079) |
生物進(jìn)程 | 鹽脅迫應(yīng)答(GO:0009651), 鉀離子跨膜轉(zhuǎn)運(yùn)(GO:0071805), 細(xì)胞內(nèi)鉀離子穩(wěn)態(tài)維持(GO:0030007), 細(xì)胞內(nèi)鉀離子穩(wěn)態(tài)維持(GO:0030007), 鈉離子跨膜轉(zhuǎn)運(yùn)(GO:0035725) |
·參考文獻(xiàn) |
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1. Longyun Xiao;Yiyuan Shi;Rong Wang;Yu Feng;Lesheng Wang;Hongsheng Zhang;Xingyu Shi;Guangqin Jing;Ping Deng;Tengzhao Song;Wen Jing;Wenhua Zhang The transcription factor OsMYBc and an E3 ligase regulate expression of a K+ transporter during salt stress Plant Physiology, 2022, 190(1): 843-859 |
2. Rong Wang;Wen Jing;Longyun Xiao;Yakang Jin;Like Shen;Wenhua Zhang The Rice High-Affinity Potassium Transporter1;1 Is Involved in Salt Tolerance and Regulated by an MYB-Type Transcription Factor Plant Physiology, 2015, 168(3): 1076-1090 |
3. Huan Wang;Meishan Zhang;Rui Guo;Decheng Shi;Bao Liu;Xiuyun Lin;Chunwu Yang Effects of salt stress on ion balance and nitrogen metabolism of old and young leaves in rice (Oryza sativa L.) BMC Plant Biology, 2012, 12: 194 |
4. FELIX HAUSER;TOMOAKI HORIE A conserved primary salt tolerance mechanism mediated by HKT transporters: a mechanism for sodium exclusion and maintenance of high K+/Na+ ratio in leaves during salinity stress Plant, Cell & Environment, 2010, 33(4): 552-565 |
5. Mehdi Jabnoune;Sandra Espeout;Delphine Mieulet;Cécile Fizames;Jean-Luc Verdeil;Geneviève Conéjéro;Alonso Rodríguez-Navarro;Hervé Sentenac;Emmanuel Guiderdoni;Chedly Abdelly;Anne-Aliénor Véry Diversity in Expression Patterns and Functional Properties in the Rice HKT Transporter Family Plant Physiology, 2009, 150(4): 1955-1971 |
6. Shaobai Huang;Wolfgang Spielmeyer;Evans S. Lagudah;Rana Munns Comparative mapping of HKT genes in wheat, barley, and rice, key determinants of Na+ transport, and salt tolerance Journal of Experimental Botany, 2008, 59(4): 927-937 |
7. Blanca Garciadeblás;María E. Senn;María A. Bañuelos;Alonso Rodríguez-Navarro Sodium transport and HKT transporters: the rice model The Plant Journal, 2003, 34(6): 788-801 |
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