Comparative Transcriptome Analysis Reveals Common and Developmental Stage-Specific Genes That Respond to Low Nitrogen in Maize Leaves
文献类型: 外文期刊
作者: Guo, Song 1 ; Arshad, Adnan 2 ; Yang, Lan 4 ; Qin, Yusheng 1 ; Mu, Xiaohuan 5 ; Mi, Guohua 2 ;
作者机构: 1.Sichuan Acad Agr Sci, Inst Agr Resources & Environm, Chengdu 610066, Peoples R China
2.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China
3.PODA Org, Islamabad 44000, Pakistan
4.Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China
5.Henan Agr Univ, Coll Agron, Synerget Innovat Ctr Henan Grain Crops, Zhengzhou 450002, Peoples R China
6.China Agr Univ, Natl Acad Agr Green Dev, Key Lab Plant Soil Interact MOE, Beijing 100193, Peoples R China
关键词: coexpression modules; division zone; elongation zone; maturation zone; RNA-seq
期刊名称:PLANTS-BASEL ( 影响因子:4.658; 五年影响因子:4.827 )
ISSN:
年卷期: 2022 年 11 卷 12 期
页码:
收录情况: SCI
摘要: A growing leaf can be divided into three sections: division zone, elongation zone, and maturation zone. In previous studies, low nitrogen (LN) inhibited maize growth and development, especially leaf growth; however, the gene expression in response to LN in different regions in leaf were not clear. Here, using hydroponics and a transcriptome approach, we systematically analyzed the molecular responses of those zones and differentially expressed genes (DEG) in response to LN supply. Developmental stage-specific genes (SGs) were highly stage-specific and involved in distinct biological processes. SGs from division (SGs-DZ) and elongation zones (SGs-EZ) were more related to developmentally dependent processes, whereas SGs of the maturation zone (SGs-MZ) were more related to metabolic processes. The common genes (CGs) were overrepresented in carbon and N metabolism, suggesting that rebalancing carbon and N metabolism in maize leaves under LN condition was independent of developmental stage. Coexpression modules (CMs) were also constructed in our experiment and a total of eight CMs were detected. Most of SGs-DZ and SGs-EZ were classified into a set termed CM turquoise, which was mainly enriched in ribosome and DNA replication, whereas several genes from SGs-MZ and CGs were clustered into CM blue, which mainly focused on photosynthesis and carbon metabolism. Finally, a comprehensive coexpression network was extracted from CM blue, and several maize CONSTANS-LIKE(ZmCOL) genes seemed to participate in regulating photosynthesis in maize leaves under LN condition in a developmental stage-specific manner. With this study, we uncovered the LN-responsive CGs and SGs that are important for promoting plant growth and development under insufficient nitrogen supply.
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