水稻POD基因家族鉴定及其结构和功能分析

Identification of POD gene family and analysis of its structure and function in rice

关键词:  水稻, POD基因家族, 基因鉴定, 结构和功能, 表达模式, 生物信息学分析

Key words:  rice, POD gene family, gene identification, structure and function, expression pattern, bioinformatics analysis

摘要:

为鉴定水稻POD基因家族成员,分析其结构和功能等特性,该研究利用生物信息学分析方法对水稻POD基因家族成员理化性质、进化关系、染色体定位、启动子顺式作用元件和表达模式进行了系统分析。结果表明:(1)在水稻中共鉴定到64个POD基因,划分为10组,它们不均匀地分布在水稻11条染色体上。(2)保守基序和结构域分析显示,50%以上的成员含有Motif1、Motif2、Motif3、Motif5、Motif9、Motif10和Motif14,它们排列顺序相似; 20个成员具有PL-6 superfamily结构域,14个成员具有HAD_like superfamily结构域。(3)POD基因家族预测到57种调控元件,可分为光响应型、激素响应型、胁迫响应型和生长发育响应型,其中光响应型G-box和激素响应型ABRE调控元件最多。(4)组织表达模式分析显示,Os03t0170900-01、Os03t0170900-02、Os06t0106800-01、Os12t0641400-01和Os12t0641400-02的表达量整体表现最高,推测它们在水稻器官组织形态建成、物质转移、光合作用和抵御胁迫等方面可能发挥着重要作用。该研究结果为深入解析水稻POD基因功能以及抗性分子设计育种提供了重要靶点资源与初步的理论基础。

Abstract:

In order to identify members of POD gene family in rice and analyze their structural and functional characteristics, bioinformatics methods were employed to systematically analyze physicochemical properties, evolutionary relationships, chromosomal locations, promoter cis-acting elements and expression patterns of this gene family. The results were as follows:(1)A total of 64 POD gene family members were identified from rice, which were classified into 10 groups and unevenly distributed across 11 rice chromosomes.(2)Conserved motif and structural domain analysis revealed that over 50% of the members contained Motif1, Motif2, Motif3, Motif5, Motif9, Motif10 and Motif14, with similar arrangement sequence; 20 members possessed PL-6 superfamily structural domain, and 14 members possessed HAD-like superfamily structural domain.(3)A total of 57 regulatory elements were predicted in POD gene family, which could be categorized into light-responsive, hormone-responsive, stress-responsive, and growth and development-responsive, among which the light-responsive G-box and hormone-responsive ABRE were the most abundant.(4)Analysis of expression patterns indicated that Os03t0170900-01, Os03t0170900-02, Os06t0106800-01, Os12t0641400-01 and Os12t0641400-02 exhibited the highest overall expression levels, suggesting that they may play crucial roles in organ and tissue morphogenesis, substance transport, photosynthesis and resistance to biotic and abiotic stresses in rice. The findings of this study lay a preliminary theoretical basis for further understanding the function of rice POD genes and provide important target resources for stress resistance-oriented molecular design breeding.