SLENDER RICE1 and <i>Oryza sativa</i> INDETERMINATE DOMAIN2 Regulating OsmiR396 Are Involved in Stem Elongation

Lu, Yunqing; Feng, Zhen; Meng, Yunlong; Bian, Liying; Xie, Hui; Mysore, Kirankumar S.; Liang, Jiansheng

doi:10.1104/pp.19.01008

Cited by 35 publications

(27 citation statements)

References 76 publications

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“…High expression of miR396 was also reported in the stem apexes of cotton dwarf mutant and shoots of apple dwarf mutant ( An et al, 2015 ; Song et al, 2017 ). miR396 was found to be negatively regulated by GA during cell proliferation ( Lu et al, 2020 ). Our previous study showed that MC significantly reduced GA levels in cotton internodes ( Wang L. et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

“…Our previous study showed that MC significantly reduced GA levels in cotton internodes ( Wang L. et al, 2020 ). Thus, the low GA concentration caused by MC may promote the expression of miR396, resulting in suppressed expression of GRFs and cell cycle-related genes, thus leading to inhibited internode elongation in cotton, as in rice ( Lu et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

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Profiling of MicroRNAs Involved in Mepiquat Chloride-Mediated Inhibition of Internode Elongation in Cotton (Gossypium hirsutum L.) Seedlings

et al. 2021

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Mepiquat chloride (MC) is the most important plant growth retardant that is widely used in cotton (Gossypium hirsutum L.) production to suppress excessive vegetative growth and improve plant architecture. MicroRNAs (miRNAs) are important gene expression regulators that control plant growth and development. However, miRNA-mediated post-transcriptional regulation in MC-induced growth inhibition remains unclear. In this study, the dynamic expression profiles of miRNAs responsive to MC in cotton internodes were investigated. A total of 508 known miRNAs belonging to 197 families and five novel miRNAs were identified. Among them, 104 miRNAs were differentially expressed at 48, 72, or 96 h post MC treatment compared with the control (0 h); majority of them were highly conserved miRNAs. The number of differentially expressed miRNAs increased with time after treatment. The expression of 14 known miRNAs was continuously suppressed, whereas 12 known miRNAs and one novel miRNA were continuously induced by MC. The expression patterns of the nine differentially expressed miRNAs were verified using qRT-PCR. The targets of the known and novel miRNAs were predicted. Four conserved and six novel targets were validated using the RLM-5′ RACE assay. This study revealed that miRNAs play crucial regulatory roles in the MC-induced inhibition of internode elongation. It can improve our understanding of post-transcriptional gene regulation in MC-mediated growth inhibition and could potentially facilitate the breeding of dwarf cotton.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Profiling of MicroRNAs Involved in Mepiquat Chloride-Mediated Inhibition of Internode Elongation in Cotton (Gossypium hirsutum L.) Seedlings

et al. 2021

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“…The induction of os-miR396 further reduces the expression of its targets, the GROWTH-REGULATING FACTORs (GRFs) transcription factors involved in growth promotion. Consistently, os-miR396 overexpression results in dwarfism that resembles GA-deficient plants [25]. Secondly, DELLAs can also function through the degradation of PIF4 that regulates miRNA levels via binding to the MIR promoter or via destabilizing the miRNA-processing complex [26,27].…”

Section: Gibberellinsmentioning

confidence: 91%

Emerging Connections between Small RNAs and Phytohormones

González

Inzé

et al. 2020

Trends in Plant Science

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“…The overexpression of miR396 represses organ growth in Arabidopsis by repressing the activity of the targeted GRF and GIF genes ( Rodriguez et al, 2010 ). Interestingly, the miR396 acts downstream of DELLA, the negative regulator of GA responses, and upstream of GA-induced cell-cycle genes for the control of stem elongation in rice ( Lu et al, 2020 ). Conversely, more recently, the miR396e and miR396f ( miR396ef ) rice mutants showed an increased grain yield under nitrogen-deficient conditions ( Zhang et al, 2020 ).…”

Section: Nitrate Is a Driving Force Of The Initial Stage Of Stem Devementioning

confidence: 99%

Nitrogen and Stem Development: A Puzzle Still to Be Solved

Souza

Tavares

2021

Front. Plant Sci.

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High crop yields are generally associated with high nitrogen (N) fertilizer rates. A growing tendency that is urgently demanding the adoption of precision technologies that manage N more efficiently, combined with the advances of crop genetics to meet the needs of sustainable farm systems. Among the plant traits, stem architecture has been of paramount importance to enhance harvest index in the cereal crops. Nonetheless, the reduced stature also brought undesirable effect, such as poor N-uptake, which has led to the overuse of N fertilizer. Therefore, a better understanding of how N signals modulate the initial and late stages of stem development might uncover novel semi-dwarf alleles without pleiotropic effects. Our attempt here is to review the most recent advances on this topic.

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SLENDER RICE1 and Oryza sativa INDETERMINATE DOMAIN2 Regulating OsmiR396 Are Involved in Stem Elongation

Cited by 35 publications

References 76 publications

Profiling of MicroRNAs Involved in Mepiquat Chloride-Mediated Inhibition of Internode Elongation in Cotton (Gossypium hirsutum L.) Seedlings

Profiling of MicroRNAs Involved in Mepiquat Chloride-Mediated Inhibition of Internode Elongation in Cotton (Gossypium hirsutum L.) Seedlings

Emerging Connections between Small RNAs and Phytohormones

Nitrogen and Stem Development: A Puzzle Still to Be Solved

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