千针万线草根转录组测序及黄酮类化合物合成相关基因挖掘

孙诗瑶; 王晓丽; 曹子林; 张博林; 郭紫微; 赵思懿

doi:10.19303/j.issn.1008-0384.2022.008.006

千针万线草根转录组测序及黄酮类化合物合成相关基因挖掘

doi: 10.19303/j.issn.1008-0384.2022.008.006

1.
西南林业大学生态与环境学院，云南　昆明　650224
2.
西南林业大学林学院，云南　昆明　650224

基金项目: 云南省高等学校大学生创新创业训练计划项目（2020106770）；云南省高校优势特色重点学科（生态学）建设项目（050005113111）；西南林业大学科研预研基金（18200115）

详细信息

作者简介:
孙诗瑶（2000−），女，本科生，研究方向：生态学（E-mail：1435377729@qq.com）

通讯作者:
曹子林（1974−），男，博士，副教授，研究方向：生态学（E-mail：1410214728@qq.com）

中图分类号: S 571.1
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- 文章访问数: 366
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- 被引次数: 0
出版历程
- 收稿日期: 2022-04-11
- 录用日期: 2022-04-11
- 修回日期: 2022-07-28
- 网络出版日期: 2022-08-08
- 刊出日期: 2022-08-28

Transcriptome Sequencing and Identification of Genes Associated with Flavonoid Biosynthesis in Stellaria yunnanensis Roots

1.
College of Ecology and Environment, Southwest Forestry University, Kunming, Yunnan　650224, China
2.
College of Forestry, Southwest Forestry University, Kunming, Yunnan　650224, China

摘要

摘要: 目的通过高通量测序获取千针万线草根转录组信息，在分子水平上进一步研究千针万线草根黄酮类的生物合成。方法采用高通量测序技术平台lllumina Novaseq 6000完成千针万线草根的转录组测序，对unigenes进行功能注释和解析黄酮类化合物的生物合成相关基因。结果总共得到34137条Unigenes，平均长度为1093.58 bp。注释到六大功能数据库（NR、egg NOG、Pfam、Swiss-Prot、GO、KEGG）中的Unigenes总数达到22369条。千针万线草根Unigenes匹配至NR数据库的有21510条，与黎科的甜菜、藜麦和菠菜有高度同源性；19414条Unigenes在egg NOG数据库得到19980个注释并划分为23类；19942条Unigenes在GO数据库中获得69356个注释，根据功能划分为细胞组分、分子功能及生物过程三大类，分别对应14、16、23个亚类，其中涉及生物过程较多；6505条Unigenes富集在KEGG数据库的131条通路中，代谢相关的通路占比最大，其中筛选获得80个与黄酮类化合物代谢相关的基因，共编码16个关键酶。同时，有724个Unigenes被注释为转录因子。结论对千针万线草根进行转录组测序及基因功能注释，并筛选到多个与黄酮类化合物合成相关的Unigenes，研究结果丰富了千针万线草根的遗传信息，可以为进一步鉴定该物种药用成分合成的关键基因及其调控机制提供一定的参考依据。
- 千针万线草 /
- 根 /
- 转录组 /
- 测序 /
- 基因功能注释
Abstract: Objective Transcriptome of Stellaria yunnanensis root was sequenced and genes associated with the flavonoid biosynthesis identified. Method Transcriptome of S. yunnanensis root was sequenced using the high-throughput Illumina Novaseq 6 000. Functional annotation of the unigenes were conducted and genes related to the biosynthesis identified. Result There were 34 137 unigenes found with an average length of 1 093.58 bp. They annotated to 6 functional databases, including NR, egg NOG, Pfam, Swiss-Prot, GO, and KEGG, that numbered 22 369 in total. There were 21 510 unigenes annotated in NR database, which had high homology with Beta vulgaris, Chenopodium quinoa, and Spinacia oleracea of Chenopodiaceae, while 19 980 from 19 414 unigenes in egg NOG in 23 categories, and 69 356 from 19 942 unigenes in GO in 3 major functional categories of cellular components, molecular functions, and, especially, biological processes with 14, 16, and 23 subcategories, respectively. Of the unigenes, 6 505 were enriched in 131 pathways in KEGG with the largest proportion related to the metabolism pathways, 80 associated with the flavonoid biosynthesis encoding 16 key enzymes, and 724 annotated as transcription factors. Conclusion The high-throughput transcriptome sequencing and gene function annotation on the S. yunnanensis roots were successfully performed. Several unigenes related to the flavonoid synthesis were identified. The information would facilitate further studies on the key genes and mechanisms in the formation of medicinal important functional ingredient in the plant.
- Stellaria yunnanensis /
- root /
- transcriptome /
- sequencing /
- gene functional annotation

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图 1 千针万线草根转录组Unigenes的长度分布

Figure 1. Distribution of length of unigenes from S. yunnanensis roots

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图 2 千针万线草根基因比对物种分类

Figure 2. Species classification of unigenes

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图 3 千针万线草unigene的egg NOG分类

A−RNA加工与修饰；B−染色质结构与动力；C−能量生产与转化；D−细胞周期调控、细胞分裂、染色体分裂；E−氨基酸转运与代谢；F−核苷酸转运与代谢；G−糖转运与代谢；H−辅酶转运与代谢；I−脂类转运与代谢；J−翻译、核糖体结构和生物合成；K−转录；L−复制、重组和修复；M−细胞壁、膜、包体生物合成；N−细胞运动性；O−蛋白质翻译后修饰与周转；P−无机离子转运与代谢；Q−次生代谢产物的生物合成； S−未知功能；T−信号传导机制；U−胞内运输、分泌和囊泡运输；V−防御机制； Y−核酸结构；Z−细胞骨架。

Figure 3. Egg NOG function classification of S. yunnanensis

A: RNA processing and modification; B: Chromatin structure and dynamics; C: Energy production and conversion; D: Cell cycle control, cell division, chromosome partitioning; E: Amino acid transport and metabolism; F: Nucleotide transport and metabolism; G: Carbohydrate transport and metabolism; H: Coenzyme transport and metabolism; I: Lipid transport and metabolism; J: Translation, ribosomal structure and biogenesis; K: Transcription; L: Replication, recombination and repair; M: Cell wall/membrane/envelope biogenesis; N: Cell motility; O: Posttranslational modification, protein turnover, chaperones; P: Inorganic ion transport and metabolism; Q: Secondary metabolites biosynthesis, transport and catabolism; S: Function unknown; T: Signal transduction mechanisms; U: Intracellular trafficking, secretion, and vesicular transport; V: Defense mechanisms; Y: Nuclear structure; Z: Cytoskeleton.

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图 4 千针万线草根GO注释结果

Figure 4. Gene ontology (GO) categorization of S. yunnanensis roots

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图 5 千针万线草根unigenes的KEGG注释结果及分类

Figure 5. KEGG classification and metabolism pathways on annotated unigenes of S. yunnanensis roots

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图 6 千针万线草根Unigene的转录因子预测

Figure 6. Predicted transcription factors of unigenes of S. yunnanensis roots

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表 1 Unigene基本信息表

Table 1. Basic information on unigenes

基因数量 Genes Num	GC核苷酸含量 GC Percentage/%	N50/bp	最大长度 Max Length/bp	最小长度 Min Length/bp	平均长度 Average Length/bp	组装的总碱基 Total assembled bases
34137	41.02	1799	14683	201	1093.58	37331463

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表 2 Unigene注释统计

Table 2. Annotation of unigenes

注释数据库 Annotation database	Unigene数目 Number of Unigene	比例 Percentage /%
Nr	21510	63.01
Swiss-prot	17208	50.41
Pfam	17702	51.86
egg NOG	19414	56.87
GO	17191	50.36
KEGG	10285	30.13
注释到的基因数量Annotation genes	22369	65.53
未注释到的基因数量Without annotation gene	11768	34.47

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表 3 千针万线草根转录组中黄酮类化合物合成相关基因

Table 3. Flavonoid biosynthesis-related gene in transcriptome of S. yunnanensis roots

代谢途径 Metabolic pathway	基因名称 Gene	KO编号 KO ID	EC编号 EC No.	Unigene数量 Number of unigene
苯丙烷代谢通路 Phenylpropane metabolic pathway	苯丙氨酸解氨酶基因（PAL）	K10775	4.3.1.24	5
	肉桂酸-4-单加氧酶基因（CYP73A）	K00487	1.14.14.91	5
	CoA连接酶基因（4CL）	K01904	6.2.1.12	8
类黄酮代谢通路 Flavonoid metabolic pathway	花青素还原酶基因（ANR）	K08695	1.3.1.77	1
	香豆酰脂3’羟化酶基因（C3’H）	K09754	1.11.13.36	2
	莽草酸羟基肉桂转移酶基因（HCT）	K13065	2.3.1.133	12
	查耳酮异构酶基因（CHI）	K01859	5.5.1.6	3
	肉桂酸-4-单加氧酶基因（CYP73A）	K00487	1.14.14.91	5
	根皮苷合酶基因（PGT1）	K22845	2.4.1.357	1
	查尔酮合成酶基因（CHS）	K00660	2.3.1.74	12
	咖啡酰辅酶A-O甲基转移酶基因（CCOAOMT）	K00588	2.1.1.104	3
	类黄酮-3’单加氧酶基因（CYP75B1）	K05280	1.14.14.82	4
	黄烷酮-3-羟化酶基因（F3H）	K00475	1.14.11.9	2
黄酮醇代谢通路 Flavonol metabolic pathway	类黄酮-3’单加氧酶基因（CYP75B1）	K05280	1.14.14.82	4
黄酮醇代谢通路 Flavonol metabolic pathway	黄酮醇-3-0-葡萄糖苷葡萄糖基转移酶基因（FG3）	K22794	2.4.1.239	6
异黄酮代谢通路 Isoflavone metabolic pathway	异黄酮2’-羟化酶基因（CYP81E）	K13260	1.14.14.90	7

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