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bHLH010/089 Transcription Factors Control Pollen Wall Development via Specific Transcriptional and Metabolic Networks in Arabidopsis thaliana. Int J Mol Sci 2022; 23:ijms231911683. [PMID: 36232985 PMCID: PMC9570398 DOI: 10.3390/ijms231911683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/17/2022] [Accepted: 09/19/2022] [Indexed: 11/05/2022] Open
Abstract
The pollen wall is a specialized extracellular cell wall that protects male gametophytes from various environmental stresses and facilitates pollination. Here, we reported that bHLH010 and bHLH089 together are required for the development of the pollen wall by regulating their specific downstream transcriptional and metabolic networks. Both the exine and intine structures of bhlh010 bhlh089 pollen grains were severely defective. Further untargeted metabolomic and transcriptomic analyses revealed that the accumulation of pollen wall morphogenesis-related metabolites, including polysaccharides, glyceryl derivatives, and flavonols, were significantly changed, and the expression of such metabolic enzyme-encoding genes and transporter-encoding genes related to pollen wall morphogenesis was downregulated in bhlh010 bhlh089 mutants. Among these downstream target genes, CSLB03 is a novel target with no biological function being reported yet. We found that bHLH010 interacted with the two E-box sequences at the promoter of CSLB03 and directly activated the expression of CSLB03. The cslb03 mutant alleles showed bhlh010 bhlh089–like pollen developmental defects, with most of the pollen grains exhibiting defective pollen wall structures.
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Zhang C, Fu F, Lin C, Ding X, Zhang J, Yan H, Wang P, Zhang W, Peng B, Zhao L. MicroRNAs Involved in Regulatory Cytoplasmic Male Sterility by Analysis RNA-seq and Small RNA-seq in Soybean. Front Genet 2021; 12:654146. [PMID: 34054917 PMCID: PMC8153375 DOI: 10.3389/fgene.2021.654146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 04/06/2021] [Indexed: 11/13/2022] Open
Abstract
Cytoplasmic male sterility (CMS) is an important plant characteristic for exploiting heterosis to enhance crop traits during breeding. However, the CMS regulatory network remains unclear in plants, even though researchers have attempted to isolate genes associated with CMS. In this study, we performed high-throughput sequencing and degradome analyses to identify microRNAs (miRNAs) and their targets in a soybean CMS line (JLCMS9A) and its maintainer line (JLCMS9B). Additionally, the differentially expressed genes during reproductive development were identified using RNA-seq data. A total of 280 miRNAs matched soybean miRNA sequences in miRBase, including mature miRNAs and pre-miRNAs. Of the 280 miRNAs, 30, 23, and 21 belonged to the miR166, miR156, and miR171 families, respectively. Moreover, 410 novel low-abundant miRNAs were identified in the JLCMS9A and JLCMS9B flower buds. Furthermore, 303 and 462 target genes unique to JLCMS9A and JLCMS9B, respectively, as well as 782 common targets were predicted based on the degradome analysis. Target genes differentially expressed between the CMS line and the maintainer line were revealed by an RNA-seq analysis. Moreover, all target genes were annotated with diverse functions related to biological processes, cellular components, and molecular functions, including transcriptional regulation, the nucleus, meristem maintenance, meristem initiation, cell differentiation, auxin-activated signaling, plant ovule development, and anther development. Finally, a network was built based on the interactions. Analyses of the miRNA, degradome, and transcriptome datasets generated in this study provided a comprehensive overview of the reproductive development of a CMS soybean line. The data presented herein represent useful information for soybean hybrid breeding. Furthermore, the study results indicate that miRNAs might contribute to the soybean CMS regulatory network by modulating the expression of CMS-related genes. These findings lay the foundation for future studies on the molecular mechanisms underlying soybean CMS.
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Affiliation(s)
- Chunbao Zhang
- Soybean Research Institute, The National Engineering Research Center for Soybean, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Fuyou Fu
- Saskatoon Research Centre, Agriculture and Agri-Food Canada, Saskatoon, SK, Canada
| | - Chunjing Lin
- Soybean Research Institute, The National Engineering Research Center for Soybean, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Xiaoyang Ding
- Soybean Research Institute, The National Engineering Research Center for Soybean, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Jingyong Zhang
- Soybean Research Institute, The National Engineering Research Center for Soybean, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Hao Yan
- Soybean Research Institute, The National Engineering Research Center for Soybean, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Pengnian Wang
- Soybean Research Institute, The National Engineering Research Center for Soybean, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Wei Zhang
- Soybean Research Institute, The National Engineering Research Center for Soybean, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Bao Peng
- Soybean Research Institute, The National Engineering Research Center for Soybean, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Limei Zhao
- Soybean Research Institute, The National Engineering Research Center for Soybean, Jilin Academy of Agricultural Sciences, Changchun, China
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Liu Z, Liu Y, Sun Y, Yang A, Li F. Comparative Transcriptome Analysis Reveals the Potential Mechanism of Abortion in Tobacco sua-Cytoplasmic Male Sterility. Int J Mol Sci 2020; 21:E2445. [PMID: 32244798 PMCID: PMC7178165 DOI: 10.3390/ijms21072445] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/30/2020] [Accepted: 03/30/2020] [Indexed: 12/30/2022] Open
Abstract
sua-CMS (cytoplasmic male sterility) is the only male sterile system in tobacco breeding, but the mechanism of abortion is unclear. Cytological characteristics show that abortion in the sua-CMS line msZY occurs before the differentiation of sporogenous cells. In this study, a comparative transcriptomic analysis was conducted on flower buds at the abortion stage of msZY and its male fertile control ZY. A total of 462 differentially expressed genes were identified in msZY and ZY, which were enriched via protein processing in the endoplasmic reticulum (ER), oxidative phosphorylation, photosynthesis, and circadian rhythm-plant by Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses. Most genes were downregulated in the ER stress pathway, heat-shock protein family, F1F0-ATPase encoding by the mitochondrial genome, and differentiation of stamens. Genes in the programmed cell death (PCD) pathway were upregulated in msZY. The transcriptome results were consistent with those of qRT-PCR. Ultrastructural and physiological analyses indicted active vacuole PCD and low ATP content in msZY young flower buds. We speculated that PCD and a deficiency in ATP synthesis are essential for the abortion of sua-CMS. This study reveals the potential mechanism of abortion of tobacco sua-CMS.
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Affiliation(s)
- Zhiwen Liu
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
- Graduate School of Chinese Academy of Agricultural Science, Beijing 100081, China
| | - Yanfang Liu
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
- Graduate School of Chinese Academy of Agricultural Science, Beijing 100081, China
| | - Yuhe Sun
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
- Department of Key Laboratory for Tobacco Gene Resources, State Tobacco Monopoly Administration, Qingdao 266101, China
| | - Aiguo Yang
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
- Department of Key Laboratory for Tobacco Gene Resources, State Tobacco Monopoly Administration, Qingdao 266101, China
| | - Fengxia Li
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
- Department of Key Laboratory for Tobacco Gene Resources, State Tobacco Monopoly Administration, Qingdao 266101, China
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Eskandari H, Ehsanpour AA, Al-Mansour N, Bardania H, Sutherland D, Mohammad-Beigi H. Rosmarinic acid inhibits programmed cell death in Solanum tuberosum L. calli under high salinity. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 147:54-65. [PMID: 31841962 DOI: 10.1016/j.plaphy.2019.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 11/10/2019] [Accepted: 12/02/2019] [Indexed: 06/10/2023]
Abstract
Oxidative stress induced by salinity is a prime cause of cell death when Na+ toxicity becomes unbearable. We explored the effect of rosmarinic acid (RA) on the Solanum tuberosum L. cv. Desiree calli against salt-induced programmed cell death (PCD). We showed that PCD events were triggered in calli under 250 mM NaCl by the loss of plasma membrane integrity as measured by the amount of malondialdehyde (MDA) in the cytoplasm, the degree of DNA degradation resulting from the cleavage of nuclear DNA into oligonucleosomal fragments in apoptotic cells, the presence of TUNEL-positive nuclei (90 ± 0.005%) damage in genomic DNA, and activation of caspase 3-like protease. Callus Formation Medium (CFM) supplemented with RA led to the suppression of salt-induced cell death and a dramatic decrease in the MDA level and frequency of TUNEL-positive nuclei under salinity to 4 ± and 7.3 ± % in the presence of 50 and 350 μM RA, respectively. The application of RA also resulted in an increase in GSH content and maintenance of a high GSH/GSSG ratio. Interestingly, these reductions in PCD were accompanied by inhibiting caspase 3-like protease activities due to RA under salinity. Molecular docking predicted high binding energies of RA for binding to subtilisin-like protease (StSCTc-3), which has caspase-3 like activity in Solanum tuberosum, near the active site. This finding supports the notion of a role for RA in PCD protection in plants, which is consistent with earlier reports in animal cells.
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Affiliation(s)
- Hoda Eskandari
- Department of Biology, University of Isfahan, Isfahan, Iran; Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus C, 8000, Denmark
| | | | - Naemah Al-Mansour
- Faculty of Science, Department of Biological Sciences, University of Kuwait, Kuwait.
| | - Hassan Bardania
- Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Duncan Sutherland
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus C, 8000, Denmark
| | - Hossein Mohammad-Beigi
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus C, 8000, Denmark
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