<i>Short Panicle 3</i> controls panicle architecture by upregulating <i>APO2/RFL</i> and increasing cytokinin content in rice

Huang, Yong; Bai, Xufeng; Luo, Meifang; Xing, Yongzhong

doi:10.1111/jipb.12729

Cited by 39 publications

(16 citation statements)

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“…These transcriptional regulators participate in plant growth, development and other processes, including biotic and abiotic stress responses (Yanagisawa, ; Gabriele et al ., ; Noguero et al ., ; Renau‐Morata et al ., ; Rymen et al ., ; Zang et al ., ). Under most conditions, the roles of DOF proteins in these physiological processes involve plant hormones (Gabriele et al ., ; Boccaccini et al ., ; Rymen et al ., ; Huang et al ., ). Ethylene is a crucial, simple gaseous phytohormone (Achard et al ., ; Van de Poel et al ., ) whose biosynthesis is highly regulated at the transcriptional and post‐transcriptional levels (Argueso et al ., ; Yoon, ; Lee & Yoon, ).…”

Section: Discussionmentioning

confidence: 97%

Rice OsDOF15 contributes to ethylene‐inhibited primary root elongation under salt stress

et al. 2019

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Summary In early seedlings, the primary root adapts rapidly to environmental changes through the modulation of endogenous hormone levels. The phytohormone ethylene inhibits primary root elongation, but the underlying molecular mechanism of how ethylene‐reduced root growth is modulated in environmental changes remains poorly understood. Here, we show that a novel rice (Oryza sativa) DOF transcription factor OsDOF15 positively regulates primary root elongation by regulating cell proliferation in the root meristem, via restricting ethylene biosynthesis. Loss‐of‐function of OsDOF15 impaired primary root elongation and cell proliferation in the root meristem, whereas OsDOF15 overexpression enhanced these processes, indicating that OsDOF15 is a key regulator of primary root elongation. This regulation involves the direct interaction of OsDOF15 with the promoter of OsACS1, resulting in the repression of ethylene biosynthesis. The control of ethylene biosynthesis by OsDOF15 in turn regulates cell proliferation in the root meristem. OsDOF15 transcription is repressed by salt stress, and OsDOF15‐mediated ethylene biosynthesis plays a role in inhibition of primary root elongation by salt stress. Thus, our data reveal how the ethylene‐inhibited primary root elongation is finely controlled by OsDOF15 in response to environmental signal, a novel mechanism of plants responding to salt stress and transmitting the information to ethylene biosynthesis to restrict root elongation.

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Section: Discussionmentioning

confidence: 97%

Rice OsDOF15 contributes to ethylene‐inhibited primary root elongation under salt stress

et al. 2019

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“…SP3 is expressed at the branch primordia of the young panicles. The mutant sp3 had an altered CK homeostasis wherein CK catabolism genes (four members of OsCKX gene family) were remarkably upregulated and CK biosynthesis genes (OsIPT3 and OsIPT7) were drastically downregulated, thus resulting in an overall reduction in the CK levels (Huang et al, 2019) (Figure 1).…”

Section: Cytokininsmentioning

confidence: 99%

Phytohormone-Mediated Molecular Mechanisms Involving Multiple Genes and QTL Govern Grain Number in Rice

et al. 2020

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Increasing the grain number is the most direct route toward enhancing the grain yield in cereals. In rice, grain number can be amplified through increasing the shoot branching (tillering), panicle branching, panicle length, and seed set percentage. Phytohormones have been conclusively shown to control the above characteristics by regulating molecular factors and their cross-interactions. The dynamic equilibrium of cytokinin levels in both shoot and inflorescence meristems, maintained by the regulation of its biosynthesis, activation, and degradation, determines the tillering and panicle branching, respectively. Auxins and gibberellins are known broadly to repress the axillary meristems, while jasmonic acid is implicated in the determination of reproductive meristem formation. The balance of auxin, gibberellin, and cytokinin determines meristematic activities in the inflorescence. Strigolactones have been shown to repress the shoot branching but seem to regulate panicle branching positively. Ethylene, brassinosteroids, and gibberellins regulate spikelet abortion and grain filling. Further studies on the optimization of endogenous hormonal levels can help in the expansion of the grain yield potential of rice. This review focuses on the molecular machinery, involving several genes and quantitative trait loci (QTL), operational in the plant that governs hormonal control and, in turn, gets governed by the hormones to regulate grain number and yield in rice.

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“…plantbiology.msu.edu) and NCBI (https://www.ncbi.nlm.nih. gov/) (Huang et al, 2018). A total of 30 Dof genes were identified.…”

Section: Haplotype Construction and Haplotype-based Association Analysismentioning

confidence: 99%

“…In our study, there were 19 genes ( Table 2) whose knockout mutants had heading date that were indistinguishable from wild type. Phylogenetic analysis showed that six pairs of genes, OsDof1 and OsDof29, OsDof2 and OsDof23, OsDof9 and OsDof18, OsDof12 and OsDof26, OsDof13 and OsDof30, and OsDof24 and OsDof25, share a very conserved gene structure outside the Dof domain (Huang et al, 2018), which is probably responsible for their similar functions. For example, knockout mutants of both OsDof1 and OsDof29 promoted flowering time under LD (Table 3).…”

Section: There Is Functional Redundancy and Differentiation Among Dofmentioning

confidence: 99%

“…In rice, a total of 30 Dof genes have been predicted through genome analysis (Lijavetzky et al, 2003). All have a highly conserved DNA-binding domain (Dof domain) of 50 amino acid residues including a C2C2-type zinc finger motif (Huang et al, 2018). RDD1/OsDof2 overexpression promotes flowering in addition to regulating nutrient ion uptake and accumulation (Iwamoto et al, 2009;Iwamoto and Tagiri, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Minor Effects of 11 Dof Family Genes Contribute to the Missing Heritability of Heading Date in Rice (Oryza sativa L.)

et al. 2020

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DNA binding with one finger (Dof) proteins are plant-specific transcription factors with important and diverse functions in seed germination, flowering time, and biotic and abiotic stresses. In this study, haplotype-based association analysis was conducted between heading date and 30 Dof family genes in a worldwide germplasm collection. Of these, 22 Dof genes were associated with heading date. Multiple comparisons among haplotypes revealed their diverse functions in promoting and suppressing heading date under shortday (SD) and long-day (LD) conditions. They cumulatively made a considerable contribution to the missing heritability of heading date. A set of knockout mutants of 30 Dof genes generated by CRISPR/Cas9-mediated genome editing technology showed that 11 and 9 Dof genes regulated heading date under LD and SD, respectively. Phenotype measurement of mutants showed that these 11 and 9 Dof genes slightly regulated heading with effects of 2-5 days under LD and SD, respectively. Both mutant and natural variation assays indicated functional redundancy in regulating heading date among Dof family genes. Nucleotide diversity analysis suggested that most Dof genes have been subjected to selection during domestication and improvement. Beyond heading date, this set of mutants is also a good resource for evaluating the function of Dof genes in regulating stress tolerance and seed germination.

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Short Panicle 3 controls panicle architecture by upregulating APO2/RFL and increasing cytokinin content in rice

Cited by 39 publications

References 59 publications

Rice OsDOF15 contributes to ethylene‐inhibited primary root elongation under salt stress

Rice OsDOF15 contributes to ethylene‐inhibited primary root elongation under salt stress

Phytohormone-Mediated Molecular Mechanisms Involving Multiple Genes and QTL Govern Grain Number in Rice

Minor Effects of 11 Dof Family Genes Contribute to the Missing Heritability of Heading Date in Rice (Oryza sativa L.)

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