Toward Understanding the Stem-Cell Origin and Molecular Regulation of Rice Tillering

Li, Chuanyou

doi:10.1016/j.jgg.2015.01.002

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…MADS34 in rice encodes a MADS-box transcription factor that coregulates the number of primary and secondary branches with LAX1 [ 51 ]. MOC1 (a direct homolog of LATERAL SUPPRESSOR , LS in tomato and LATERAL SUPPRESSOR , LAS in Arabidopsis ) was the first key transcription factor identified [ 52 , 53 ] controlling rice tillering; it is mainly expressed in leaf axils and axillary buds during AM development, positively regulating rice tillering [ 43 , 54 ]. As expression of MOC1 and LAX1 is not altered in the tab 1 mutant, TAB1 plays a role in an independent pathway or downstream of MOC1 and LAX1.…”

Section: Axillary Meristem Formationmentioning

confidence: 99%

The Role of Transcription Factors in the Regulation of Plant Shoot Branching

Zhang

Fang

Chen

et al. 2022

Plants

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Transcription factors, also known as trans-acting factors, balance development and stress responses in plants. Branching plays an important role in plant morphogenesis and is closely related to plant biomass and crop yield. The apical meristem produced during plant embryonic development repeatedly produces the body of the plant, and the final aerial structure is regulated by the branching mode generated by axillary meristem (AM) activities. These branching patterns are regulated by two processes: AM formation and axillary bud growth. In recent years, transcription factors involved in regulating these processes have been identified. In addition, these transcription factors play an important role in various plant hormone pathways and photoresponses regulating plant branching. In this review, we start from the formation and growth of axillary meristems, including the regulation of hormones, light and other internal and external factors, and focus on the transcription factors involved in regulating plant branching and development to provide candidate genes for improving crop architecture through gene editing or directed breeding.

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Section: Axillary Meristem Formationmentioning

confidence: 99%

The Role of Transcription Factors in the Regulation of Plant Shoot Branching

Zhang

Fang

Chen

et al. 2022

Plants

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“…It has been revealed that when the green foxtail density is above the threshold of 32 plants/m 2 , it causes loss rate of alfalfa yield in alfalfa fields [ 5 ]. Tillering is an important agronomic trait of Poaceae that greatly determines seed output [ 6 ]. For crops, such as cucumber and sorghum, strong tillering ability can increase food production [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Understanding the responses of tillering to 2,4-D isooctyl ester in Setaria viridis L.

Xiong,

Jia,

Wang

et al. 2024

BMC Genomics

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Background Green foxtail [Setaria viridis (L.)] is one of the most abundant and troublesome annual grass weeds in alfalfa fields in Northeast China. Synthetic auxin herbicide is widely used in agriculture, while how auxin herbicide affects tillering on perennial grass weeds is still unclear. A greenhouse experiment was conducted to examine the effects of auxin herbicide 2,4-D on green foxtail growth, especially on tillers. Results In the study, 2,4-D isooctyl ester was used. There was an inhibition of plant height and fresh weight on green foxtail after application. The photosynthetic rate of the leaves was dramatically reduced and there was an accumulation of malondialdehyde (MDA) content. Moreover, applying 2,4-D isooctyl ester significantly reduced the tillering buds at rates between 2100 and 8400 ga. i. /ha. Transcriptome results showed that applying 2,4-D isooctyl ester on leaves affected the phytohormone signal transduction pathways in plant tillers. Among them, there were significant effects on auxin, cytokinin, abscisic acid (ABA), gibberellin (GA), and brassinosteroid signaling. Indeed, external ABA and GA on leaves also limited tillering in green foxtail. Conclusions These data will be helpful to further understand the responses of green foxtail to 2, 4-D isooctyl ester, which may provide a unique perspective for the development and identification of new target compounds that are effective against this weed species.

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“…Tillers are also key components in the plant architecture of rice (Guo et al., 2020; Wang & Li, 2011; Wang et al., 2018a). The formation of rice tillers is a two‐step process, including the initiation of axillary buds at each leaf axil and their subsequent outgrowth (Li, 2015; Li et al., 2003; Shimizu‐Sato & Mori, 2001). Basal/early secondary axillary buds may continue to outgrow into tillers to enhance the grain yield, whereas the later/higher‐order axillary buds normally become dormant under the regulation by genetic pathways involving various hormones (Chen et al., 2021; Domagalska & Leyser, 2011; Janssen et al., 2014; Kotov et al., 2021; Wang et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

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

Liu

et al. 2022

The Plant Journal

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SUMMARY As a multigenic trait, rice tillering can optimize plant architecture for the maximum agronomic yield. SQUAMOSA PROMOTER BINDING PROTEIN‐LIKE14 (OsSPL14) has been demonstrated to be necessary and sufficient to inhibit rice branching, but the underlying mechanism remains largely unclear. Here, we demonstrated that OsSPL14, which is cleaved by miR529 and miR156, inhibits tillering by fine‐tuning auxin transport in rice. RNA interference of OsSPL14 or miR529 and miR156 overexpression significantly increased the tiller number, whereas OsSPL14 overexpression decreased the tiller number. Histological analysis revealed that the OsSPL14‐overexpressing line had normal initiation of axillary buds but inhibited outgrowth of tillers. Moreover, OsSPL14 was found to be responsive to indole‐acetic acid and 1‐naphthylphthalamic acid, and RNA interference of OsSPL14 reduced polar auxin transport and increased 1‐naphthylphthalamic acid sensitivity of rice plants. Further analysis revealed that OsSPL14 directly binds to the promoter of PIN‐FORMED 1b (OsPIN1b) and PIN‐LIKE6b (PILS6b) to regulate their expression positively. OsPIN1b and PILS6b were highly expressed in axillary buds and proved involved in bud outgrowth. Loss of function of OsPIN1b or PILS6b increased the tiller number of rice. Taken together, our findings suggested that OsSPL14 could control axillary bud outgrowth and tiller number by activating the expression of OsPIN1b and PILS6b to fine‐tune auxin transport in rice.

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Toward Understanding the Stem-Cell Origin and Molecular Regulation of Rice Tillering

Cited by 4 publications

References 5 publications

The Role of Transcription Factors in the Regulation of Plant Shoot Branching

The Role of Transcription Factors in the Regulation of Plant Shoot Branching

Understanding the responses of tillering to 2,4-D isooctyl ester in Setaria viridis L.

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

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