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作物学报 ›› 2024, Vol. 50 ›› Issue (12): 2950-2961.doi: 10.3724/SP.J.1006.2024.44057

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

花生种皮类黄酮物质的代谢组与转录组分析

金欣欣(), 苏俏, 宋亚辉, 杨永庆, 李玉荣, 王瑾()   

  1. 河北省农林科学院粮油作物研究所 / 河北省作物遗传育种重点实验室, 河北石家庄 050035
  • 收稿日期:2024-04-08 接受日期:2024-08-15 出版日期:2024-12-12 网络出版日期:2024-08-27
  • 通讯作者: *王瑾, E-mail: wangjinnky@163.com
  • 作者简介:E-mail: jinxinxin1984@163.com
  • 基金资助:
    财政部和农业农村部国家现代农业产业技术体系建设专项(CARS-13);河北省现代农业产业技术体系建设专项(HBCT2024040101);河北省现代农业产业技术体系建设专项(HBCT2024040204);河北省花生现代种业科技创新团队(21326316D);河北省农林科学院创新工程(2022KJCXZX-LYS-11)

Metabolome and transcriptome analysis of flavonoids in peanut testa

JIN Xin-Xin(), SU Qiao, SONG Ya-Hui, YANG Yong-Qing, LI Yu-Rong, WANG Jin()   

  1. Institute of Cereal and Oil Crops, Hebei Academy of Agricultural and Forestry Sciences / Hebei Key Laboratory of Crop Genetics and Breeding, Shijiazhuang 050035, Hebei, China
  • Received:2024-04-08 Accepted:2024-08-15 Published:2024-12-12 Published online:2024-08-27
  • Contact: *E-mail: wangjinnky@163.com
  • Supported by:
    China Agriculture Research System of MOF and MARA(CARS-13);Hebei Agriculture Research System(HBCT2024040101);Hebei Agriculture Research System(HBCT2024040204);Science and Technology Innovation Team of Modern Peanut Seed Industry(21326316D);Talents Construction Project of Science and Technology Innovation of Hebei Academy of Agriculture and Forestry Sciences(2022KJCXZX-LYS-11)

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摘要：

为探究不同颜色花生种皮的类黄酮物质成分及花青素生物合成对种皮颜色形成的调控机制, 本研究利用粉色、红色、白色、黑色以及花斑色(红色和白色)共5种颜色差异明显的花生品种, 对种皮进行类黄酮代谢组和转录组分析, 明确种皮花青素合成相关的关键代谢物和关键基因。结果表明,5种花生种皮共鉴定到329种类黄酮代谢物, 其中黄酮醇类物质相对含量及种类最多。共检测到19种花青素色苷, 主要是矢车菊素色苷、飞燕草素色苷、矮牵牛素色苷, 多以葡萄糖苷、桑布苷、芸香苷、半乳糖苷等糖苷修饰。黑色种皮花青素含量约是其他皮色的22.60~66.72倍。黑色种皮中以矢车菊素-3-O-桑布双糖苷相对含量最高。4种有色种皮分别与白色种皮相比, 差异代谢物主要在花青素生物合成、类黄酮生物合成、黄酮和黄酮醇生物合成、异黄酮生物合成途径中显著富集。有色种皮中, 类黄酮和花青素生物合成途径结构基因的高表达水平, 是促进种皮花青素积累的主要原因。花青素还原酶(ANR)和糖基转移酶(UGT)是参与种皮色素沉着的候选基因, 两者的活性以及对底物花青素的竞争, 最终决定花生种皮的颜色模式。本研究解析了类黄酮物质对花生种皮颜色合成的调控机制, 可为特色花生品种培育以及营养价值利用提供重要参考。

关键词: 花生, 种皮, 类黄酮, 代谢组, 转录组

Abstract:

To explore the regulatory mechanisms of flavonoid components and anthocyanin biosynthesis in the color formation of peanut testa, we conducted a study using five peanut cultivars with different testa colors: pink, red, white, black, and speckled (red and white). The key metabolites and genes related to anthocyanin biosynthesis were identified using flavonoid metabolomics and transcriptomics. Our results revealed the identification of 329 flavonoid metabolites in peanut testa, with flavonols being the most abundant in both relative content and variety. We detected 19 types of anthocyanidins, including cyanidin, delphinidin, and petunidin. Most anthocyanidins were modified with glucoside, morbuside, rutin, galactoside, and other glycosides. Notably, the anthocyanin content in black testa was 22.60-66.72 times higher than that in other testa colors, with cyanidin-3-O-sambutin being the most prevalent in black testa. Different metabolites were significantly enriched in anthocyanin biosynthesis, flavonoid biosynthesis, flavone and flavonol biosynthesis, and isoflavone biosynthesis pathways in colored testa compared to white testa. The high expression levels of structural genes in the flavonoid and anthocyanin biosynthesis pathways promoted anthocyanin accumulation in colored testa. Anthocyanin reductase (ANR) and glycosyltransferase (UGT) emerged as candidate genes involved in testa pigmentation, with the competition and activity of UGT and ANR against substrate anthocyanin determining the color pattern of peanut testa. These findings elucidate the regulatory mechanisms of flavonoid substances in peanut testa color, providing valuable references for the breeding of special peanut varieties and the utilization of their nutritional value based on color differences.

Key words: peanut, testa, flavonoids, metabolome, transcriptome

图1

5个花生种皮的表型差异 PT: 粉皮; WT: 白皮; RT: 红皮; CT: 花斑皮; BT: 黑皮。"

图2

花生种皮类黄酮代谢物种类(A)和相对含量(B) PT: 粉皮; WT: 白皮; RT: 红皮; CT: 花斑皮; BT: 黑皮。"

图3

不同花生种皮中花青素的相对含量 PT: 粉皮; WT: 白皮; RT: 红皮; CT: 花斑皮; BT: 黑皮。图中不同小写字母表示样品间有显著差异性(P < 0.05)。"

图4

不同比较组差异代谢物的数目(A)和差异表达基因的数目(B) PT: 粉皮; WT: 白皮; RT: 红皮; CT: 花斑皮; BT: 黑皮。"

图5

不同比较组差异代谢物(A)和差异基因(B)的KEGG富集通路 PT: 粉皮; WT: 白皮; RT: 红皮; CT: 花斑皮; BT: 黑皮。"

图6

类黄酮和花青素合成途径DEMs的含量热图(A)以及DEMs与DEGs的相关性热图(B) PT: 粉皮; WT: 白皮; RT: 红皮; CT: 花斑皮; BT: 黑皮。"

表1

类黄酮和花青素生物合成途径富集到差异表达基因的FPKM值"

酶种类
Enzyme class		 差异表达基因
DEGs		 黑皮
BT		 花斑皮
CT		 粉皮
PT		 红皮
RT		 白皮
WT
查尔酮合成酶
Chalcone synthase (CHS)
 A01g004662 0.60 0.87 0.92 0.20 0.95
A03g016137 176.29 177.86 68.54 59.53 30.44
A05g024845 25.61 16.35 1.10 3.62 0.38
B01g052224 1.05 0.25 0.57 0.59 1.14
B03g067612 188.56 213.25 96.22 78.82 46.62
B05g078749 1.75 0.45 0.24 0.14 0
B05g078750 3.59 1.19 0.38 0.31 0.03
B06g084455 163.86 37.62 101.96 109.79 72.33
Scaffold6g107977 0.19 1.03 0.45 0.13 0.19
Scaffold6g107983 0.66 1.87 1.58 0.48 1.01
novel.4300 0.48 1.10 0.66 0.24 0.35
novel.4302 0.38 1.14 1.05 0.21 0.77
查尔酮异构酶
Chalcone isomerase (CHI)
 A04g020659 1.73 1.35 2.09 1.76 0.03
A09g041790 0.32 0.47 0.60 0.38 0.22
A10g048771 46.61 27.58 23.76 15.80 12.38
B02g057981 3.31 1.62 3.35 7.69 4.10
B09g099540 21.24 13.24 10.51 9.67 4.56
B10g104123 67.03 47.14 36.85 32.85 20.07
novel.5812 0.79 0.31 0.73 2.07 0.70
黄烷酮羟化酶
Flavanone 3-hydroxylase (F3H)		 A01g003995 81.12 59.87 14.24 10.71 1.85
novel.3235 52.47 47.26 14.83 10.56 1.32
类黄酮羟化酶
Flavonoid 3'-hydroxylase (F3'H)		 A10g047831 56.48 26.57 12.05 7.12 4.27
B10g105286 146.62 49.23 34.29 15.90 3.87
二氢黄酮醇还原酶
Dihydroflavonol reductase (DFR)		 B06g086139 135.00 130.73 26.27 28.59 19.30
黄酮醇合成酶
Flavonol synthetase (FLS)		 A07g032578 5.63 27.24 13.56 16.49 12.47
B10g102931 1.79 2.23 3.64 1.65 1.69
无色花青素还原酶
Leucocyanidin reductase (LAR)		 A05g022192 28.44 15.87 0.94 0.09 0.02
B05g076540 24.65 12.28 0.82 0.09 0
花青素合成酶
Anthocyanidin synthase (ANS)		 B10g102589 0.22 0.30 0.59 0.36 0.95
Scaffold1g106620 26.42 17.92 6.72 3.46 0.18
花青素还原酶
Anthocyanin reductase (ANR)		 A03g011741 5.71 1.73 6.06 0.36 0.11
A03g016167 0.82 0.06 0.39 0.10 0.34
A04g018753 6.46 3.74 3.46 4.53 3.07
B03g067636 4.05 0.81 1.97 0.96 1.64
novel.367 22.70 0.43 4.77 0.18 0.11
糖基转移酶
UDP-glycosyltransferases (UGT)		 A03g015165 5.32 8.97 2.54 1.92 0.01
B10g101189 0 1.32 0 0.16 0.17

图7

花青素生物合成途径的表达模式"

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