甘草Pht1基因家族鉴定与表达分析
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国家自然科学基金 (31600320);


Identification and Expression Analysis of Pht1 Gene Family in Glycyrrhiza uralensis Fisch.
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    摘要:

    Pht1家族磷酸盐(Pi)转运体介导植物中磷(P)的吸收和再动员。为探讨甘草Pht1基因的结构及表达模式,该研究利用生物信息学方法对甘草Pht1(GuPht1)基因家族进行分析,结合转录组数据和实时荧光定量(qRTPCR)分析GuPht1在非生物胁迫下的表达,并采用RTPCR克隆4个GuPht1基因。结果显示:(1)甘草中有8个Pht1家族成员(GuPht1;1—GuPht1;8),都位于细胞膜上,且具有12个跨膜结构,属于MFS超家族,氨基酸长度介于521~570 aa之间,含有Pht1保守的特征序列GGDYPLSATIMSE。(2)系统进化分析显示,甘草GuPht1基因家族成员与豆科植物亲缘关系较近;启动子区含有与磷饥饿有关的Wbox、Gbox、PHOlike和P1BS元件;甘草GuPht1基因家族在Scaffold定位分布均匀,三级结构均为单体。(3)转录组数据分析显示,GuPht1响应干旱、盐、激素等胁迫,且表达有组织特异性。qRTPCR结果表明,低磷胁迫下GuPht1基因有明显的时空表达差异性,GuPht1;1/1;6/1;8在根中表达明显上调,GuPht1;5/1;6在叶中表达明显上调,低磷处理显著提高了GuPht1在根和叶中的表达量,根中被诱导上调表达的成员更多;在干旱、盐、激素处理下根和叶中GuPht1;5都被显著诱导表达。(4)成功克隆甘草GuPht1;1/1;2/1;4/1;5基因,长度分别为1 562、1 618、1 625 和1 616 bp,编码522、538、540和537个氨基酸。本研究结果为深入探讨Pht1家族的功能和甘草对营养胁迫的响应机理提供参考。

    Abstract:

    The Pht1 family of phosphate transporters mediate the uptake and remobilization of phosphorus (P) in plants. To investigate the structure and expression pattern of the Pht1 (GuPht1) gene family in Glycyrrhiza uralensis, this study analyzed the GuPht1 gene family by using bioinformatic approaches. The spatial and temporal expression of GuPht1 under abiotic stress was analyzed by qRTPCR and transcriptome data. And four genes were cloned by reverse transcription PCR. The results showed that: (1) there were a total of 8 Pht1 genes (named GuPht1;1—GuPht1;8) in G. uralensis, all of which located on the cell membrane and had 12 transmembrane structures, belonging to the MFS superfamily. The length of amino acid sequence ranged from 521 to 570 aa, and contained a conserved Pht1 characteristic sequence (GGDYPLSATIMSE). (2) In phylogenetic analysis, the members of the GuPht1 gene family were closely related to those of legumes. There were some elements, such as Wbox, Gbox, PHOlike and P1BS in the promoter regions with functions in P starvation. The GuPht1 were evenly distributed on the scaffold, and GuPht1 proteins were monomeric proteins. (3) Transcriptome analysis showed that the GuPht1 played a certain role in response to drought and salt stresses, and had tissuespecific expression pattern. GuPht1;1/1;6/1;8 were significantly upregulated in roots, and GuPht1;5/1;6 were significantly upregulated in leaves. Low P treatment significantly increased the relative expression of GuPht1 in roots and leaves, and more members were upregulated in roots. GuPht1;5 was significantly upregulated in roots and leaves under drought, salt and hormone treatments. (4) GuPht1;1/1;2/1;4/1;5 genes were cloned and their lengths were 1 562 bp, 1 618 bp, 1 625 bp and 1 616 bp, encoding 522, 538, 540 and 537 amino acids, respectively. This study provided reference for further study on the function of Pht1 family and the response mechanism of G. uralensis to nutrient stress.

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张亚丽,王 楠,高 静,等.甘草Pht1基因家族鉴定与表达分析[J].西北植物学报,2022,42(2):229-241

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  • 在线发布日期: 2022-03-23
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