<scp>OsSPL14</scp> acts upstream of <scp><i>OsPIN1b</i></scp> and <scp><i>PILS6b</i></scp> to modulate axillary bud outgrowth by fine‐tuning auxin transport in rice

Li, Yan; He, Yizhou; Liu, Zhixin; Qin, Tian; Wang, Lei; Chen, Zhihui; Zhang, Biaoming; Zhang, Haitao; Li, Haitao; Liu, Li; Zhang, Jian; Yuan, Wenya

doi:10.1111/tpj.15884

Cited by 13 publications

(3 citation statements)

References 95 publications

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“…As a member of the SBP family, the LG1 homolog has also been reported to be related to auxin in rice. OsSPL14 of the SBP family binds to the promoter of OsPIN1b to regulate the distribution of auxin and inhibit the growth of tillers ( Li et al., 2022 ). Functioning upstream of ZmLG1 , two ZmLG2 homologous genes, OsLG2 and OsLG2L , were identified to redundantly regulate the LA of rice.…”

Section: Molecular Mechanism Of La Regulated By Lg1mentioning

confidence: 99%

Molecular and functional dissection of LIGULELESS1 (LG1) in plants

Qin

Zhao

2023

Front. Plant Sci.

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Plant architecture is a culmination of the features necessary for capturing light energy and adapting to the environment. An ideal architecture can promote an increase in planting density, light penetration to the lower canopy, airflow as well as heat distribution to achieve an increase in crop yield. A number of plant architecture-related genes have been identified by map cloning, quantitative trait locus (QTL) and genome-wide association study (GWAS) analysis. LIGULELESS1 (LG1) belongs to the squamosa promoter-binding protein (SBP) family of transcription factors (TFs) that are key regulators for plant growth and development, especially leaf angle (LA) and flower development. The DRL1/2-LG1-RAVL pathway is involved in brassinosteroid (BR) signaling to regulate the LA in maize, which has facilitated the regulation of plant architecture. Therefore, exploring the gene regulatory functions of LG1, especially its relationship with LA genes, can help achieve the precise regulation of plant phenotypes adapted to varied environments, thereby increasing the yield. This review comprehensively summarizes the advances in LG1 research, including its effect on LA and flower development. Finally, we discuss the current challenges and future research goals associate with LG1.

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Section: Molecular Mechanism Of La Regulated By Lg1mentioning

confidence: 99%

Molecular and functional dissection of LIGULELESS1 (LG1) in plants

Qin

Zhao

2023

Front. Plant Sci.

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“…Rice DENSE AND ERECT PANICLE 1 ( OsDEP1 ) promotes cell division and increases the number of branches, resulting in increased rice SNP [ 3 , 4 ]. Rice SQUAMOSA PROMOTER BINDING PROTEIN-LIKE 14 / Ideal Plant Architecture 1 ( OsSPL14/IPA1 ) and OsSPL18 bind to the OsDEP1 promoter during the reproductive growth stage and positively regulate the expression level of OsDEP1 , resulting in a larger panicle size and increased SNP in rice [ 5 , 6 , 7 , 8 ]. Recent studies revealed that LARGE2 regulates panicle size and grain number in rice by encoding a Homologous to E6AP C-Terminus (HECT)-domain E3 ubiquitin protein ligase (UPL) OsUPL2 [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

RNA-Seq Transcriptome Analysis and Evolution of OsEBS, a Gene Involved in Enhanced Spikelet Number per Panicle in Rice

Niu,

Liu,

Dong

et al. 2023

IJMS

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Spikelet number per panicle (SNP) is one of the most important yield components in rice. Rice ENHANCING BIOMASS AND SPIKELET NUMBER (OsEBS), a gene involved in improved SNP and yield, has been cloned from an accession of Dongxiang wild rice. However, the mechanism of OsEBS increasing rice SNP is poorly understood. In this study, the RNA-Seq technology was used to analyze the transcriptome of wildtype Guichao 2 and OsEBS over-expression line B102 at the heading stage, and analysis of the evolution of OsEBS was also conducted. A total of 5369 differentially expressed genes (DEGs) were identified between Guichao2 and B102, most of which were down-regulated in B102. Analysis of the expression of endogenous hormone-related genes revealed that 63 auxin-related genes were significantly down-regulated in B102. Gene Ontogeny (GO) enrichment analysis showed that the 63 DEGs were mainly enriched in eight GO terms, including auxin-activated signaling pathway, auxin polar transport, auxin transport, basipetal auxin transport, and amino acid transmembrane transport, most of which were directly or indirectly related to polar auxin transport. Kyoto Encyclopedia of Genes and Genomes (KEGG) metabolic pathway analysis further verified that the down-regulated genes related to polar auxin transport had important effects on increased SNP. Analysis of the evolution of OsEBS found that OsEBS was involved in the differentiation of indica and japonica, and the differentiation of OsEBS supported the multi-origin model of rice domestication. Indica (XI) subspecies harbored higher nucleotide diversity than japonica (GJ) subspecies in the OsEBS region, and XI experienced strong balancing selection during evolution, while selection in GJ was neutral. The degree of genetic differentiation between GJ and Bas subspecies was the smallest, while it was the highest between GJ and Aus. Phylogenetic analysis of the Hsp70 family in O. sativa, Brachypodium distachyon, and Arabidopsis thaliana indicated that changes in the sequences of OsEBS were accelerated during evolution. Accelerated evolution and domain loss in OsEBS resulted in neofunctionalization. The results obtained from this study provide an important theoretical basis for high-yield rice breeding.

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“…Tiller formation in rice consists of two processes, the initiation of axillary buds on each leaf axil and their further outgrowth [1][2][3]. During the vegetative growth period, axillary buds persist in forming tillers and spikelets to enhance grain yield [4,5]. However, later axillary buds usually go dormant under the regulation of various hormones [5], which is one of the mechanisms through which rice prevents excessive tillering [6].…”

Section: Introductionmentioning

confidence: 99%

OsMDH12: A Peroxisomal Malate Dehydrogenase Regulating Tiller Number and Salt Tolerance in Rice

Shi,

Feng,

Wang

et al. 2023

Plants

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Salinity is an important environmental factor influencing crop growth and yield. Malate dehydrogenase (MDH) catalyses the reversible conversion of oxaloacetate (OAA) to malate. While many MDHs have been identified in various plants, the biochemical function of MDH in rice remains uncharacterised, and its role in growth and salt stress response is largely unexplored. In this study, the biochemical function of OsMDH12 was determined, revealing its involvement in regulating tiller number and salt tolerance in rice. OsMDH12 localises in the peroxisome and is expressed across various organs. In vitro analysis confirmed that OsMDH12 converts OAA to malate. Seedlings of OsMDH12-overexpressing (OE) plants had shorter shoot lengths and lower fresh weights than wild-type (WT) plants, while osmdh12 mutants displayed the opposite. At maturity, OsMDH12-OE plants had fewer tillers than WT, whereas osmdh12 mutants had more, suggesting OsMDH12’s role in tiller number regulation. Moreover, OsMDH12-OE plants were sensitive to salt stress, but osmdh12 mutants showed enhanced salt tolerance. The Na+/K+ content ratio increased in OsMDH12-OE plants and decreased in osmdh12 mutants, suggesting that OsMDH12 might negatively affect salt tolerance through influencing the Na+/K+ balance. These findings hint at OsMDH12’s potential as a genetic tool to enhance rice growth and salt tolerance.

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OsSPL14 acts upstream of OsPIN1b and PILS6b to modulate axillary bud outgrowth by fine‐tuning auxin transport in rice

Cited by 13 publications

References 95 publications

Molecular and functional dissection of LIGULELESS1 (LG1) in plants

Molecular and functional dissection of LIGULELESS1 (LG1) in plants

RNA-Seq Transcriptome Analysis and Evolution of OsEBS, a Gene Involved in Enhanced Spikelet Number per Panicle in Rice

OsMDH12: A Peroxisomal Malate Dehydrogenase Regulating Tiller Number and Salt Tolerance in Rice

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