Rice transcriptional repressor OsTIE1 controls anther dehiscence and male sterility by regulating JA biosynthesis
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PROVIDER: PRJNA1044442 | ENA |
REPOSITORIES: ENA
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Project description:The coordination of pollen viability, stamen filament elongation and anther dehiscence is essential for the successful pollination and reproduction in angiosperms. The hormone jasmonic acid (JA) are crucial for these processes. However, the tight regulation of JA biosynthesis during stamen development is still largely unknown. Here, we demonstrate that the rice (Oryza sativa) ERF-associated amphiphilic repression (EAR) motif-containing protein TCP INTERACTOR CONTAINING EAR MOTIF PROTEIN1 (OsTIE1) tightly regulates JA biosynthesis by repressing TEOSINTE BRANCHED1/CYCLOIDEA/PROLIFERATINGCELLFACTORS (TCP) transcription factor OsTCP1/PCF5 during stamen development. The loss of OsTIE1 function in ostie1 mutants causes male sterility. The ostie1 mutants display inviable pollen, the early stamen filament elongation and the precocious anther dehiscence. JA biosynthesis is activated earlier and JA level is precociously increased in anthers of ostie1. The expression of OsTIE1 is developmentally regulated during stamen development. OsTIE1 is localized in nuclei and has transcriptional repression activity. We further show that OsTIE1 directly interacts with OsTCP1, and overexpression of OsTCP1 caused early anther dehiscence resembling that of ostie1. The expression of genes encoding key enzymes of JA biosynthesis including Oryza sativa lipoxygenase (OsLOX) genes is regulated by the OsTIE1-OsTCP1 complex. Our findings discover that the OsTIE1-OsTCP1 module plays critical roles in stamen development by finely tuning JA biosynthesis, and provides a new foundation to create male sterile plants for hybrid seed production.
2023-12-02 | GSE248536 | GEO
Project description:In flowering plants, anther dehiscence and pollen release are essential for sexual reproduction. Anthers dehisce after cell wall degradation weakens stomium cell junctions in each anther locule, and desiccation creates mechanical forces that open the locules. Either effect or both together may break stomium cell junctions. The microRNA miR167 negatively regulates ARF6 and ARF8, which encode Auxin Response transcription Factors. Arabidopsis mARF6 or mARF8 plants with mutated miR167 target sites have defective anther dehiscence and ovule development. Null mir167a mutations recapitulated mARF6 and mARF8 anther and ovule phenotypes, indicating that MIR167a is the main miR167 precursor gene that delimits ARF6 and ARF8 expression in these organs. Anthers of mir167a or mARF6/8 plants overexpressed genes encoding cell wall loosening functions associated with cell expansion, and grew too large starting at flower stage 11. Experimental desiccation enabled dehiscence of miR167-deficient anthers, indicating competence to dehisce. Conversely, high humidity conditions delayed anther dehiscence in wild-type flowers. These results support a model in which miR167-mediated anther growth arrest permits anther dehiscence. Without miR167 regulation, excess anther growth delays dehiscence by prolonging desiccation.
2019-07-15 | GSE122436 | GEO
Project description:miR167 limits anther growth to potentiate anther dehiscence
| PRJNA505255 | ENA
Project description:Jasmonate (JA) is a plant hormone that controls trade-offs between plant growth and responses to biotic and abiotic stresses. Although recent studies uncover core mechanism for JA-induced responses in Arabidopsis thaliana, it remains elusive how plants attenuate those responses. We report here that a basic-helix-loop-helix type transcription factor named JA-INDUCIBLE MYC2-LIKE1 (JAM1) acts as a transcriptional repressor and negatively regulates JA signaling. Arabidopsis plants expressing the chimeric repressor for JAM1 exhibited a substantial reduction of JA responses, including JA-induced inhibition of root growth, accumulation of anthocyanin, and male fertility. These plants were also compromised in resistance to attack by Spodoptera exigua. Conversely, jam1-4 loss-of-function mutants showed enhanced JA responsiveness, including increased resistance to the insect attack. Competitive binding of JAM1 and MYC2 to the target sequence of MYC2 suggested negative regulation of JA signaling by JAM1 and suppression of MYC2 function. These results indicate that JAM1 plays a pivotal role in fine-tuning of JA-mediated stress responses and plant growth by negatively regulating JA signaling.
2013-07-03 | GSE42552 | GEO
Project description:Jasmonate (JA) is a plant hormone that controls trade-offs between plant growth and responses to biotic and abiotic stresses. Although recent studies uncover core mechanism for JA-induced responses in Arabidopsis thaliana, it remains elusive how plants attenuate those responses. We report here that a basic-helix-loop-helix type transcription factor named JA-INDUCIBLE MYC2-LIKE1 (JAM1) acts as a transcriptional repressor and negatively regulates JA signaling. Arabidopsis plants expressing the chimeric repressor for JAM1 exhibited a substantial reduction of JA responses, including JA-induced inhibition of root growth, accumulation of anthocyanin, and male fertility. These plants were also compromised in resistance to attack by Spodoptera exigua. Conversely, jam1-4 loss-of-function mutants showed enhanced JA responsiveness, including increased resistance to the insect attack. Competitive binding of JAM1 and MYC2 to the target sequence of MYC2 suggested negative regulation of JA signaling by JAM1 and suppression of MYC2 function. These results indicate that JAM1 plays a pivotal role in fine-tuning of JA-mediated stress responses and plant growth by negatively regulating JA signaling. Transcriptomes of ProJAM1:JAM1-SRDX, ProMYC2:MYC2-SRDX and wild-type Arabidopsis seedlings with or without jasmonic acid were compared.
2013-07-03 | E-GEOD-42552 | biostudies-arrayexpress
Project description:MALE STERILITY 35 (MS35/ MYB26) is a R2R3-type MYB transcription factor (Steiner-Large et al., 2003). MS35 is suggested to be a key regulator in the process of lignified secondary thickening in the anther endothecium which provides mechanical force for anther dehiscence (Dawson et al., 1999). The ms35 mutant bears non-dehiscent anthers and thus exhibits a male sterile phenotype. This microarray experiment aims to identify genes controlled by MS35 and thus establish the precise role MS35 plays during anther development. We have demonstrated that MS35 is expressed in the anther during pollen mitotic divisions. Comparisons of gene expression will be carried out between anthers from the Ler.gl (wild-type control) and ms35.gl (mutant) to identify genes with altered expression due to the ms35 mutation. The use of the gl marker will enable a prompt identification of the ms35 mutant amongst the segregating population. The wild-type control line was chosen to be Ler.gl which ensures that the changes of gene expression are not due to the gl mutation. Plants were grown in growth chambers at 22h of daylight (167 umol.m2.sec-1) at 24 C and 2h of night at 24 C. Developmental stages of anthers were defined by bud position and DAPI staining. As soon as the plants showed three fertile or sterile siliques, anther and filaments were collected from both lines at Pollen Mitosis I (PM I), bicellular, and PM II stage, separately. RNA was extracted using RNeasy Mini Kit (Qiagen, USA) and digested with DNase to eliminate genomic DNA contamination. The identified genes will be further analysed using bioinformatics and genomic (knockout) resources that are available for Arabidopsis. 12 samples were used in this experiment.
2009-12-09 | E-GEOD-19267 | biostudies-arrayexpress
Project description:MALE STERILITY 35 (MS35/ MYB26) is a R2R3-type MYB transcription factor (Steiner-Large et al., 2003). MS35 is suggested to be a key regulator in the process of lignified secondary thickening in the anther endothecium which provides mechanical force for anther dehiscence (Dawson et al., 1999). The ms35 mutant bears non-dehiscent anthers and thus exhibits a male sterile phenotype. This microarray experiment aims to identify genes controlled by MS35 and thus establish the precise role MS35 plays during anther development. We have demonstrated that MS35 is expressed in the anther during pollen mitotic divisions. Comparisons of gene expression will be carried out between anthers from the Ler.gl (wild-type control) and ms35.gl (mutant) to identify genes with altered expression due to the ms35 mutation. The use of the gl marker will enable a prompt identification of the ms35 mutant amongst the segregating population. The wild-type control line was chosen to be Ler.gl which ensures that the changes of gene expression are not due to the gl mutation. Plants were grown in growth chambers at 22h of daylight (167 umol.m2.sec-1) at 24 C and 2h of night at 24 C. Developmental stages of anthers were defined by bud position and DAPI staining. As soon as the plants showed three fertile or sterile siliques, anther and filaments were collected from both lines at Pollen Mitosis I (PM I), bicellular, and PM II stage, separately. RNA was extracted using RNeasy Mini Kit (Qiagen, USA) and digested with DNase to eliminate genomic DNA contamination. The identified genes will be further analysed using bioinformatics and genomic (knockout) resources that are available for Arabidopsis.
2009-12-10 | GSE19267 | GEO
Project description:The loss-of-function mutant of AtLEJ1 had well-developed anther cells and showed an increased accumulation of JA and ET in its flower bud clusters. Conversely, overexpression of AtLEJ1 caused a delay in the development of the floral organs, arrested anther cell development and secondary cell-wall biosynthesis in the endothecium cells, and reduced JA and ET contents in the flower bud clusters, resulting in male-sterility through anther indehiscence. We used microarrays to gain a comprehensive understanding of the transcriptional changes induced by AtLEJ1 gene expression, Keywords: Comparison of transcripts during flower development among 35S:AtLEJ1, atlej1 and wild type.
2008-12-20 | GSE5449 | GEO
Project description:Anther development is a complex process, and the study of its molecular mechanism has an important impact on plant breeding. This study aims to identify microRNA (miRNA), mRNA, long non-coding RNA (lncRNA), and circular RNA (circRNA) related to anther development of Chinese cabbage, so as to construct competitive endogenous RNA (ceRNA) regulatory networks and provide valuable knowledge for the exploration of pollen development mechanism of Chinese cabbage. A total of 9055 mRNA, 585 miRNA, 1344 lncRNA, and 165 circRNA were identified as differentially expressed in the anther of Chinese cabbage compared with Mix (roots, stems and leaves) by whole-transcriptome sequencing. The anther-related ceRNA-miRNA-target gene regulatory network through miRNA targeting relationships was constructed and 450 pairs of ceRNA relationships, including 97 DEmiRNA-DEmRNA, 281 DEmiRNA-DElncRNA, and 23 DEmiRNA-DEcircRNA interactions were obtained in Chinese cabbage. The genes in the ceRNA network were enriched in the pathways including starch and sucrose metabolism, carbon metabolism, pyruvate metabolism and carbon fixation in photosynthetic organisms, plant hormone signal transduction, and RNA degradation. This study identified some important genes and their interaction lncRNAs, circRNAs, and miRNAs involved in microsporogenesis (BraA06g035480.3C), tapetum and callose layer development (BraA09g009280.3C, BraA04g028920.3C, and BraA10g022680.3C etc), pollen wall formation (BraA06g000980.3C, BraA02g023130.3C, and BraA10g029650.3C etc), and anther dehiscence (BraA10g027200.3C, BraA04g023740.3C, and BraA04g030860.3C etc). Additionally, we analyzed the promoter activity of six anther predominant expression genes, and the results showed that they were all expressed specifically in the anther of Chinese cabbage. This study lay the foundation for further research on the molecular mechanism of anther growth and development.
2022-02-23 | GSE171705 | GEO
Project description:Anther development is a complex process, and the study of its molecular mechanism has an important impact on plant breeding. This study aims to identify microRNA (miRNA), mRNA, long non-coding RNA (lncRNA), and circular RNA (circRNA) related to anther development of Chinese cabbage, so as to construct competitive endogenous RNA (ceRNA) regulatory networks and provide valuable knowledge for the exploration of pollen development mechanism of Chinese cabbage. A total of 9055 mRNA, 585 miRNA, 1344 lncRNA, and 165 circRNA were identified as differentially expressed in the anther of Chinese cabbage compared with Mix (roots, stems and leaves) by whole-transcriptome sequencing. The anther-related ceRNA-miRNA-target gene regulatory network through miRNA targeting relationships was constructed and 450 pairs of ceRNA relationships, including 97 DEmiRNA-DEmRNA, 281 DEmiRNA-DElncRNA, and 23 DEmiRNA-DEcircRNA interactions were obtained in Chinese cabbage. The genes in the ceRNA network were enriched in the pathways including starch and sucrose metabolism, carbon metabolism, pyruvate metabolism and carbon fixation in photosynthetic organisms, plant hormone signal transduction, and RNA degradation. This study identified some important genes and their interaction lncRNAs, circRNAs, and miRNAs involved in microsporogenesis (BraA06g035480.3C), tapetum and callose layer development (BraA09g009280.3C, BraA04g028920.3C, and BraA10g022680.3C etc), pollen wall formation (BraA06g000980.3C, BraA02g023130.3C, and BraA10g029650.3C etc), and anther dehiscence (BraA10g027200.3C, BraA04g023740.3C, and BraA04g030860.3C etc). Additionally, we analyzed the promoter activity of six anther predominant expression genes, and the results showed that they were all expressed specifically in the anther of Chinese cabbage. This study lay the foundation for further research on the molecular mechanism of anther growth and development.
2022-02-23 | GSE171706 | GEO