scholarly journals Nitrogen Assimilation Related Genes in Brassica napus: Systematic Characterization and Expression Analysis Identified Hub Genes in Multiple Nutrient Stress Responses

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2160
Author(s):  
Xuyou He ◽  
Hao Zhang ◽  
Xiangsheng Ye ◽  
Juan Hong ◽  
Guangda Ding
Keyword(s):  
Brassica Napus ◽  
Stress Responses ◽  
Gene Evolution ◽  
Hub Genes ◽  
Ammonium Toxicity ◽  
Oil Crops ◽  
Genome Wide ◽  
N Assimilation ◽  
Expansion Pattern ◽  
Phosphorus And Potassium

Nitrogen (N) is an essential macronutrient for plants. However, little is known about the molecular regulation of N assimilation in Brassica napus, one of the most important oil crops worldwide. Here, we carried out a comprehensive genome-wide analysis of the N assimilation related genes (NAGs) in B. napus. A total of 67 NAGs were identified encoding major enzymes involved in N assimilation, including asparagine synthetase (AS), glutamate dehydrogenase (GDH), glutamine oxoglutarate aminotransferase (GOGAT), glutamine synthetase (GS), nitrite reductase (NiR), nitrate reductase (NR). The syntenic analysis revealed that segmental duplication and whole-genome duplication were the main expansion pattern during gene evolution. Each NAG family showed different degrees of differentiation in characterization, gene structure, conserved motifs and cis-elements. Furthermore, diverse responses of NAG to multiple nutrient stresses were observed. Among them, more NAGs were regulated by N deficiency and ammonium toxicity than by phosphorus and potassium deprivations. Moreover, 12 hub genes responding to N starvation were identified, which may play vital roles in N utilization. Taken together, our results provide a basis for further functional research of NAGs in rapeseed N assimilation and also put forward new points in their responses to contrasting nutrient stresses.

scholarly journals Genome-Wide Identification and Characterization of the RCI2 Gene Family in Allotetraploid Brassica napus Compared with Its Diploid Progenitors

2022 ◽  
Vol 23 (2) ◽  
pp. 614
Author(s):  
Weiqi Sun ◽  
Mengdi Li ◽  
Jianbo Wang
Keyword(s):  
Brassica Napus ◽  
Gene Family ◽  
Gene Structure ◽  
Stress Responses ◽  
Stress Protein ◽  
Purifying Selection ◽  
Cis Acting ◽  
Genome Wide ◽  
Duplication Events

Brassica napus and its diploid progenitors (B. rapa and B. oleracea) are suitable for studying the problems associated with polyploidization. As an important anti-stress protein, RCI2 proteins widely exist in various tissues of plants, and are crucial to plant growth, development, and stress response. In this study, the RCI2 gene family was comprehensively identified and analyzed, and 9, 9, and 24 RCI2 genes were identified in B. rapa, B. oleracea, and B. napus, respectively. Phylogenetic analysis showed that all of the identified RCI2 genes were divided into two groups, and further divided into three subgroups. Ka/Ks analysis showed that most of the identified RCI2 genes underwent a purifying selection after the duplication events. Moreover, gene structure analysis showed that the structure of RCI2 genes is largely conserved during polyploidization. The promoters of the RCI2 genes in B. napus contained more cis-acting elements, which were mainly involved in plant development and growth, plant hormone response, and stress responses. Thus, B. napus might have potential advantages in some biological aspects. In addition, the changes of RCI2 genes during polyploidization were also discussed from the aspects of gene number, gene structure, gene relative location, and gene expression, which can provide reference for future polyploidization analysis.

scholarly journals Identification and Expression Analysis of SLAC/SLAH Gene Family in Brassica napus L.

2021 ◽  
Vol 22 (9) ◽  
pp. 4671
Author(s):  
Yunyou Nan ◽  
Yuyu Xie ◽  
Ayub Atif ◽  
Xiaojun Wang ◽  
Yanfeng Zhang ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Gene Family ◽  
Expression Analysis ◽  
Stress Responses ◽  
Structural Characteristics ◽  
Brassica Napus L ◽  
Nitrate Treatment ◽  
Genome Wide ◽  
Slow Type ◽  
Hormone Responses

Slow type anion channels (SLAC/SLAHs) play important roles during anion transport, growth and development, abiotic stress responses and hormone responses in plants. However, there is few report on SLAC/SLAHs in rapeseed (Brassica napus). Genome-wide identification and expression analysis of SLAC/SLAH gene family members were performed in B. napus. A total of 23 SLAC/SLAH genes were identified in B. napus. Based on the structural characteristics and phylogenetic analysis of these members, the SLAC/SLAHs could be classified into three main groups. Transcriptome data demonstrated that BnSLAH3 genes were detected in various tissues of the rapeseed and could be up-regulated by low nitrate treatment in roots. BnSLAC/SLAHs were exclusively localized on the plasma membrane in transient expression of tobacco leaves. These results will increase our understanding of the evolution and expression of the SLAC/SLAHs and provide evidence for further research of biological functions of candidates in B. napus.

scholarly journals Genome-wide identification and comparative analysis of Dof gene family in Brassica napus

2020 ◽  
Author(s):  
Neeta Lohani ◽  
Saeid Babaei ◽  
Mohan B. Singh ◽  
Prem L. Bhalla
Keyword(s):  
Abiotic Stress ◽  
Brassica Napus ◽  
Gene Family ◽  
Stress Responses ◽  
Structure Evolution ◽  
Oilseed Crop ◽  
Evolutionary Analysis ◽  
Abiotic Stress Response ◽  
Protein Motifs ◽  
Genome Wide

AbstractDOF, DNA binding with one finger proteins are plant-specific transcription factors shown to play roles in diverse plant functions. However, a—little is known about DOF protein repertoire of the allopolyploid crop, Brassica napus. Here, we report genome-wide identification and systematic analysis of the Dof transcription factor family in this important oilseed crop. We identified 117 Brassica napus Dof genes (BnaDofs). So far, this is the largest number of Dof genes reported in a single eudicot species. Based on phylogenetic analysis, BnaDofs were classified into nine groups (A, B1, B2. C1, C2.1, C2.2, C3, D1, D2). Most members belonging to a particular group displayed conserved gene structural organisation and similar protein motifs distribution. Chromosomal localisation analysis highlighted the uneven distribution of BnaDofs across all chromosomes. Evolutionary analysis exemplified that the divergence of Brassica genus from Arabidopsis, the whole genome triplication event, and the hybridisation of B. oleracea and B. rapa to form B. napus, followed by gene loss and rearrangements, led to the expansion and divergence of Dof TF gene family in B. napus. Functional annotation of BnaDof proteins, cis-element analysis of their promoters suggested potential roles in organ development, the transition from vegetative to the reproductive stage, light responsiveness, phytohormone responsiveness as well as abiotic stress responses. Furthermore, the transcriptomic analysis highlighted the preferential tissue-specific expression patters of BnaDofs and their role in response to various abiotic stress. Overall, this study provides a comprehensive understanding of the molecular structure, evolution, and potential functional roles of Dof genes in plant development and abiotic stress response.

scholarly journals Brassica napus Infected with Leptosphaeria maculans

Genes ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 296 ◽  
Author(s):  
Ma ◽  
Wei ◽  
Lin ◽  
Zhang ◽  
Sun ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Stress Responses ◽  
Intron Retention ◽  
Leptosphaeria Maculans ◽  
Rna Seq ◽  
Hub Genes ◽  
Transcriptional Regulatory ◽  
Genes Encoding ◽  
Alternatively Spliced ◽  
Transcriptome Diversity

Alternative splicing (AS) is a post-transcriptional regulatory process that enhances transcriptome diversity, thereby affecting plant growth, development, and stress responses. To identify the new transcripts and changes in the isoform-level AS landscape of rapeseed (Brassica napus) infected with the fungal pathogen Leptosphaeria maculans, we compared eight RNA-seq libraries prepared from mock-inoculated and inoculated B. napus cotyledons and stems. The AS events that occurred in stems were almost the same as those in cotyledons, with intron retention representing the most common AS pattern. We identified 1892 differentially spliced genes between inoculated and uninoculated plants. We performed a weighted gene co-expression network analysis (WGCNA) to identify eight co-expression modules and their Hub genes, which are the genes most connected with other genes within each module. There are nine Hub genes, encoding nine transcription factors, which represent key regulators of each module, including members of the NAC, WRKY, TRAF, AP2/ERF-ERF, C2H2, C2C2-GATA, HMG, bHLH, and C2C2-CO-like families. Finally, 52 and 117 alternatively spliced genes in cotyledons and stems were also differentially expressed between mock-infected and infected materials, such as HMG and C2C2-Dof; which have dual regulatory mechanisms in response to L. maculans. The splicing of the candidate genes identified in this study could be exploited to improve resistance to L. maculans.

scholarly journals Genome-wide identification and expression profile analysis of trihelix transcription factor family genes in response to abiotic stress in sorghum [Sorghum bicolor (L.) Moench]

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Kuiyin Li ◽  
Lili Duan ◽  
Yubo Zhang ◽  
Miaoxiao Shi ◽  
Songshu Chen ◽  
...  
Keyword(s):  
Transcription Factors ◽  
Abiotic Stress ◽  
Stress Responses ◽  
Gene Evolution ◽  
Profile Analysis ◽  
Stress Conditions ◽  
Expression Profile Analysis ◽  
Genome Wide ◽  
Breeding Programmes ◽  
Sorghum Breeding

Abstract Background Transcription factors, including trihelix transcription factors, play vital roles in various growth and developmental processes and in abiotic stress responses in plants. The trihelix gene has been systematically studied in some dicots and monocots, including Arabidopsis, tomato, chrysanthemum, soybean, wheat, corn, rice, and buckwheat. However, there are no related studies on sorghum. Results In this study, a total of 40 sorghum trihelix (SbTH) genes were identified based on the sorghum genome, among which 34 were located in the nucleus, 5 in the chloroplast, 1 (SbTH38) in the cytoplasm, and 1 (SbTH23) in the extracellular membrane. Phylogenetic analysis of the SbTH genes and Arabidopsis and rice trihelix genes indicated that the genes were clustered into seven subfamilies: SIP1, GTγ, GT1, GT2, SH4, GTSb8, and orphan genes. The SbTH genes were located in nine chromosomes and none on chromosome 10. One pair of tandem duplication gene and seven pairs of segmental duplication genes were identified in the SbTH gene family. By qPCR, the expression of 14 SbTH members in different plant tissues and in plants exposed to six abiotic stresses at the seedling stage were quantified. Except for the leaves in which the genes were upregulated after only 2 h exposure to high temperature, the 12 SbTH genes were significantly upregulated in the stems of sorghum seedlings after 24 h under the other abiotic stress conditions. Among the selected genes, SbTH10/37/39 were significantly upregulated, whereas SbTH32 was significantly downregulated under different stress conditions. Conclusions In this study, we identified 40 trihelix genes in sorghum and found that gene duplication was the main force driving trihelix gene evolution in sorghum. The findings of our study serve as a basis for further investigation of the functions of SbTH genes and providing candidate genes for stress-resistant sorghum breeding programmes and increasing sorghum yield.

scholarly journals Genome-wide identification and functional analysis of the TIFY gene family in the response to multiple stresses in Brassica napus L.

BMC Genomics ◽  
2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Xin He ◽  
Yu Kang ◽  
Wenqian Li ◽  
Wei Liu ◽  
Pan Xie ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Stress Responses ◽  
Expression Patterns ◽  
Specific Protein ◽  
Vital Role ◽  
Evolutionary Analysis ◽  
Brassica Napus L ◽  
Multiple Stress ◽  
Biotic Stresses ◽  
Genome Wide

Abstract Background TIFY is a plant-specific protein family with a diversity of functions in plant development and responses to stress and hormones, which contains JASMONATE ZIM-domain (JAZ), TIFY, PPD and ZML subfamilies. Despite extensive studies of TIFY family in many other species, TIFY has not yet been characterized in Brassica napus. Results In this study, we identified 77, 36 and 39 TIFY family genes in the genome of B. napus, B. rapa and B. oleracea, respectively. Results of the phylogenetic analysis indicated the 170 TIFY proteins from Arabidopsis, B. napus, B. rapa and B. oleracea could be divided into 11 groups: seven JAZ groups, one PPD group, one TIFY group, and two ZIM/ZML groups. The molecular evolutionary analysis showed that TIFY genes were conserved in Brassicaceae species. Gene expression profiling and qRT-PCR revealed that different groups of BnaTIFY members have distinct spatiotemporal expression patterns in normal conditions or following treatment with different abiotic/biotic stresses and hormones. The BnaJAZ subfamily genes were predominantly expressed in roots and up-regulated by NaCl, PEG, freezing, methyl jasmonate (MeJA), salicylic acid (SA) and Sclerotinia sclerotiorum in leaves, suggesting that they have a vital role in hormone signaling to regulate multiple stress tolerance in B. napus. Conclusions The extensive annotation and expression analysis of the BnaTIFY genes contributes to our understanding of the functions of these genes in multiple stress responses and phytohormone crosstalk in B. napus.

scholarly journals Genome-Wide Identification and Characterization of GATA Family Genes in Brassica Napus

2020 ◽  
Author(s):  
Weizhuo Zhu ◽  
Yiyi Guo ◽  
Yeke Chen ◽  
Dezhi Wu ◽  
Lixi Jiang
Keyword(s):  
Brassica Napus ◽  
Expression Patterns ◽  
Distribution Analysis ◽  
Nucleotide Polymorphisms ◽  
Good Opportunity ◽  
Domain Structures ◽  
Oil Crops ◽  
Genome Wide ◽  
A Genome

Abstract Background: GATA transcription factors are involved in plant developmental processes, which also respond to environmental stresses through binding DNA regulatory regions to regulate the downstream genes. However, little information of GATA genes is available in Brassica napus, one of important oil crops. The release of B. napus genome sequences provides a good opportunity to perform a genome-wide characterization of GATA family genes in the rapeseed genome. Results: In this study, 96 GATA genes randomly distributing on 19 chromosomes were identified in B. napus. They were classified into four subfamilies on the basis of phylogenetic analysis and the domain structures. The sequences of BnGATAs were obvious divergence among four subfamilies based on their GATA domains, structures and motif compositions. Gene duplication and the synteny between the genomes of B. napus and A. thaliana were also analyzed to provide insights into the evolutionary characteristics. Moreover, BnGATAs showed different expression patterns in various tissues and under diverse abiotic stresses. Single nucleotide polymorphisms (SNPs) distribution analysis suggests functional disparity of GATA family genes in different genotypes of a core collection germplasm.Conclusion: This study examined genomic structures, evolution features, expression patterns and SNP distribution of 96 BnGATAs. The results enriched our knowledge of the GATA genes in rapeseed.

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