OsMYB7 determines leaf angle at the late developmental stage of lamina joints in rice

Kim, Suk Hwan; Yoon, Jungwon; Kim, Hanna; Lee, Sang-Ji; Kim, Tae-Hoon; Kang, Kiyoon; Paek, Nam‐Chon

doi:10.3389/fpls.2023.1167202

Cited by 7 publications

(2 citation statements)

References 90 publications

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“…When OsMYB7 is overexpressed, it results in the development of wide-angled leaves, while knockout mutants of osmyb7 display erect leaves. OsMYB7 achieves this effect by increasing the thickness of sclerenchyma cell walls, primarily by elevating the cellulose content [50]. Interestingly, in the current study, the MYB TF family members such as RSM1 and RSM3 play a role in the culm neck angle.…”

Section: Discussionmentioning

confidence: 50%

Anatomical and Transcriptome Analyses of Moso Bamboo Culm Neck Growth: Unveiling Key Insights

Guo,

Chen,

Chu

et al. 2023

Plants

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The Moso bamboo culm neck, connected with the rhizome and the shoot bud, is an important hub for connecting and transporting the aboveground and belowground systems of bamboo for the shoot bud development and rapid growth. Our previous study revealed that the culm neck generally undergoes six different developmental stages (CNS1–CNS6), according to the primary thickening growth of the underground shoot bud. However, the molecular mechanism of the culm neck development remains unknown. The present study focused on the developmental process of the CNS3–CNS5 stages, representing the early, middle, and late elongation stages, respectively. These stages are densely packed with vascular tissues and consist of epidermis, hypodermis, cortex, and ground tissue. Unlike the hollow structure of the culms, the culm necks are solid structures. As the culm neck continues to grow, the lignin deposition increases noticeably, contributing to its progressive strengthening. For the transcriptome analysis, a total of 161,160 transcripts with an average length of 2373 were obtained from these stages using both PacBio and Illumina sequencing. A total of 92.2% of the reads mapped to the Moso bamboo reference genome. Further analysis identified a total of 5524 novel genes and revealed a dynamic transcriptome. Secondary-metabolism- and transport-related genes were upregulated particularly with the growth of the culm neck. Further analysis revealed the molecular processes of lignin accumulation in the culm neck, which include differentially expressed genes (DEGs) related to cell wall loosening and remodeling and secondary metabolism. Moreover, the upregulations of transcription factors such as MYBH and RSM in the MYB family play crucial roles during critical transitions in the culm neck development, such as changes in the angle between the rhizome and the culm neck. Our new findings provide essential insights into the cellular roadmaps, transcriptional networks, and key genes involved in the culm neck development.

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Section: Discussionmentioning

confidence: 50%

Anatomical and Transcriptome Analyses of Moso Bamboo Culm Neck Growth: Unveiling Key Insights

Guo,

Chen,

Chu

et al. 2023

Plants

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“…Previous studies have documented the role of these TF families in governing LA regulation. For example, OsMYB7 contributes to leaf inclination by modulating auxin levels and promoting cell elongation on the adaxial side [ 74 ]. Although the erect leaf phenotype offers advantages in terms of enhanced yield under certain conditions, for the adaptation of crops to diverse geographical environments, it is considered more desirable to have erect leaves while retaining some degree of plasticity rather than a complete loss of structural flexibility.…”

Section: Discussionmentioning

confidence: 99%

Genome-Wide Identification and Analysis of Collar Region-Preferential Genes in Rice

Hong

Lee

et al. 2023

Plants

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The collar region plays a crucial role in leaf angle formation and plant architecture, which is important for improving crop yield given the challenges of diminishing arable land and changing environmental conditions. To determine collar region-preferential genes (CRPGs) affecting plant architecture and crop yield, we conducted genome-wide transcriptomic analysis. By integrating our RNA sequencing data with public rice anatomical expression data, we identified 657 CRPGs. Verification involved testing six randomly selected CRPGs, all of which exhibited collar-preferential expression. The functional significance of CRPGs was assessed via Gene Ontology enrichment analysis, utilizing MapMan and KEGG, and literature analysis provided additional information for characterized CRPGs. Our findings revealed links between manipulating leaf angle and phytohormone-related pathways and stress responses. Moreover, based on the CRPGs, five transcription factors downstream of the liguleless 1 (LG1) gene were identified. Overall, the identified CRPGs provide potential targets for further research and breeding applications aimed at improving crop productivity by manipulating leaf architecture.

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Fine-mapping and validation of the major quantitative trait locus QFlANG-4B for flag leaf angle in wheat

Zhang,

Chen,

Yang

et al. 2024

Theor Appl Genet

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Flag leaf angle (FLANG) is closely related to crop architecture and yield. We previously identi ed the quantitative trait locus (QTL) QFLANG-4B for FLANG on chromosome 4B, located within a 14-cM interval anked by the markers Xbarc20 and Xzyh357, using a mapping population of recombinant inbred lines (RILs) derived from a cross between Nongda3331 (ND3331) and Zang1817. In this study, we nemapped QFLANG-4B and validated its associated genetic effect. We developed a BC 3 F 3 population using ND3331 as the recurrent parent through marker-assisted selection, as well as near-isogenic lines (NILs) by sel ng BC 3 F 3 plants carrying different heterozygous segments for the QFLANG-4B region. We obtained eight recombinant types for QFLANG-4B, narrowing its location down to a 5.3-Mb region. This region contained 76 predicted genes, 7 of which we considered to be likely candidate genes for QFLANG-4B. Marker and phenotypic analyses of individual plants from the secondary mapping populations and their progeny revealed that the FLANG of the ND3331 allele is signi cantly higher than that of the Zang1817 allele in multiple environments. These results not only provide a basis for the map-based cloning of QFLANG-4B, but also indicate that QFLANG-4B has great potential for marker-assisted selection in wheat breeding programs designed to improve plant architecture and yield. Key messageThis study precisely mapped and validated a quantitative trait locus (QTL) located on chromosome 4B for ag leaf angle in wheat.

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OsMYB7 determines leaf angle at the late developmental stage of lamina joints in rice

Cited by 7 publications

References 90 publications

Anatomical and Transcriptome Analyses of Moso Bamboo Culm Neck Growth: Unveiling Key Insights

Anatomical and Transcriptome Analyses of Moso Bamboo Culm Neck Growth: Unveiling Key Insights

Genome-Wide Identification and Analysis of Collar Region-Preferential Genes in Rice

Fine-mapping and validation of the major quantitative trait locus QFlANG-4B for flag leaf angle in wheat

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