华北农学报 ›› 2024, Vol. 39 ›› Issue (4): 143-153. doi: 10.7668/hbnxb.20194769

所属专题: 土壤肥料 栽培生理

• 耕作栽培·生理生化 • 上一篇    下一篇

藜麦幼苗响应低氮的转录组分析

杨雅舒1, 郁培义1, 王建华1, 陕嘉楠1, 裴红宾2, 杨利艳2   

  1. 1 山西电子科技学院 生物与食品工程学院,山西 临汾 041000
    2 山西师范大学 生命科学学院,山西 太原 030031
  • 收稿日期:2023-12-27 出版日期:2024-08-27
  • 通讯作者:
    杨利艳(1972—),女,山西大同人,教授,博士,主要从事植物逆境响应研究。
  • 作者简介:

    杨雅舒(1994—),女,山西霍州人,助教,硕士,主要从事植物逆境响应研究。

  • 基金资助:
    山西省应用基础研究计划项目(202203021221122)

Transcriptome Analysis of Quinoa Seedlings in Response to Low Nitrogen

YANG Yashu1, YU Peiyi1, WANG Jianhua1, SHAN Jianan1, PEI Hongbin2, YANG Liyan2   

  1. 1 School of Biological and Food Engineering,Shanxi University of Electronic Science and Technology,Linfen 041000,China
    2 School of Life Science,Shanxi Normal University,Taiyuan 030031,China
  • Received:2023-12-27 Published:2024-08-27

摘要:

为探究藜麦响应低氮的分子机制,筛选低氮响应基因,揭示藜麦响应低氮的适应性变化,从不同氮素水平处理下藜麦的生长和叶绿素合成入手,采用RNA-Seq技术从转录组水平分析藜麦对于低氮和缺氮分别处理5 d和30 d后的响应情况。结果表明,藜麦在缺氮条件下根系优先生长;低氮和缺氮均可促使老叶优先变黄或脱落而维持幼嫩叶片的叶色,且均提高了幼苗对氮素的利用效率。GO功能富集分析结果显示,低氮和缺氮分别在处理5 d和30 d后差异表达基因均主要涉及膜的重要组成部分、细胞膜、氧化还原过程、代谢过程、ATP结合及金属离子结合等。KEGG富集分析结果表明,低氮和缺氮处理相对于高氮处理5 d后比较显著的差异代谢通路在于苯丙素的生物合成和谷胱甘肽代谢;而处理30 d后比较显著的差异代谢通路在于碳代谢通路。进一步挖掘藜麦响应低氮的关键基因,结果显示,低氮和缺氮处理5 d后过氧化物酶、谷胱甘肽S-转移酶、抗坏血酸过氧化物酶基因上调,表达量较高;低氮和缺氮处理30 d后磷酸甘油酸激酶、半胱氨酸合成酶、3-磷酸甘油醛脱氢酶(NADP)、磷酸烯醇丙酮酸羧化酶基因上调,表达量较高。qRT-PCR验证结果与RNA-Seq测序结果一致。

关键词: 藜麦, 低氮, 苯丙素生物合成, 谷胱甘肽代谢, 碳代谢

Abstract:

In order to explore the molecular mechanism of low nitrogen response in quinoa, low nitrogen response genes were screened to reveal the adaptive changes in quinoa response to low nitrogen.Based on the seedling growth observation and chlorophyll synthesis detection,we analyzed the transcriptome changes of quinoa after 5 d and 30 d under nitrogen deficiency conditions.The results showed that roots were preferentially developed under nitrogen starvation condition.Older leaves turned yellow or dropped down under both low nitrogen and nitrogen starvation conditions,therefore younger leaves could maintain green.Higher NUE was shown in both low and nitrogen starvation conditions.GO enrichment analysis indicated that significantly differential expressed genes were mainly involved in integral component of membrane,membrane,oxidation-reduction process,metabolic process,ATP binding,and metal ion binding.After 5 d of low or nitrogen starvation supply,KEGG enrichment analysis showed that phenylpropyl biosynthesis and glutathione metabolism were the most significant metabolic pathways compared with high nitrogen.After 30 d of treatment,the most significant metabolic pathway was the carbon metabolic pathway.The key genes in response to low nitrogen in quinoa were further explored.The results showed that peroxidase,glutathione S-transferase and ascorbate peroxidase genes were up-regulated and their expressions were higher after 5 days of low nitrogen and nitrogen deficiency treatment.The genes of phosphoglycerate kinase,cysteine synthetase,glyceraldehyde 3-phosphate dehydrogenase (NADP)and phosphoenolpyruvate carboxylase were up-regulated and the expression levels were higher after 30 days of low and low nitrogen treatment.The results of qRT-PCR agreed with the RNA-Seq.

Key words: Quinoa, Low nitrogen, Phenylpropanoid biosynthesis, Glutathione metabolism, Carbon metabolism

引用本文

杨雅舒, 郁培义, 王建华, 陕嘉楠, 裴红宾, 杨利艳. 藜麦幼苗响应低氮的转录组分析[J]. 华北农学报, 2024, 39(4): 143-153. doi: 10.7668/hbnxb.20194769.

YANG Yashu, YU Peiyi, WANG Jianhua, SHAN Jianan, PEI Hongbin, YANG Liyan. Transcriptome Analysis of Quinoa Seedlings in Response to Low Nitrogen[J]. Acta Agriculturae Boreali-Sinica, 2024, 39(4): 143-153. doi: 10.7668/hbnxb.20194769.