The transcription factor <scp>ZmNAC126</scp> accelerates leaf senescence downstream of the ethylene signalling pathway in maize

Yang, Zhen; Wang, Chaoqi; Qiu, Kai; Chen, Huiru; Li, Zhongpeng; Li, Xin; Song, Jun‐Ho; Wang, Xiaolei; Gao, Jiong; Kuai, Benke; Zhou, Xin

doi:10.1111/pce.13803

Cited by 36 publications

(16 citation statements)

References 74 publications

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“…Since the process of leaf senescence is accompanied by nutrient return, genes that regulate senescence are likely to regulate crop yield. In supporting this hypothesis, several NAC-TFs regulate crop yield by fine-tuning the initiation and progression of leaf senescence, such as NAM-B1 and TaNAC-S in wheat ( Uauy et al, 2006 ; Zhao et al, 2015 ; Kang et al, 2019 ; Sakuraba et al, 2020 ; Yang et al, 2020 ; Yan et al, 2021 ), which provides a molecular strategy to improve crop yield or quality by finely regulating the leaf senescence process.…”

Section: Multiple-layers Of Regulation On Leaf Senescencementioning

confidence: 91%

Multiple Layers of Regulation on Leaf Senescence: New Advances and Perspectives

et al. 2021

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Leaf senescence is the last stage of leaf development and is an orderly biological process accompanied by degradation of macromolecules and nutrient recycling, which contributes to plant fitness. Forward genetic mutant screening and reverse genetic studies of senescence-associated genes (SAGs) have revealed that leaf senescence is a genetically regulated process, and the initiation and progression of leaf senescence are influenced by an array of internal and external factors. Recently, multi-omics techniques have revealed that leaf senescence is subjected to multiple layers of regulation, including chromatin, transcriptional and post-transcriptional, as well as translational and post-translational levels. Although impressive progress has been made in plant senescence research, especially the identification and functional analysis of a large number of SAGs in crop plants, we still have not unraveled the mystery of plant senescence, and there are some urgent scientific questions in this field, such as when plant senescence is initiated and how senescence signals are transmitted. This paper reviews recent advances in the multiple layers of regulation on leaf senescence, especially in post-transcriptional regulation such as alternative splicing.

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Section: Multiple-layers Of Regulation On Leaf Senescencementioning

confidence: 91%

Multiple Layers of Regulation on Leaf Senescence: New Advances and Perspectives

et al. 2021

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“…EIN3 and ORE1 induce the chlorophyll degradation through directly activating chlorophyll catabolic genes (Qiu et al, 2015 ). ZmNAC126 is transactivated by ZmEIN3 and regulates chlorophyll degradation of ethylene-induced senescence in maize (Yang et al, 2020 ). Therefore, an intricate transcription network involving EIN2 and EIN3 plays significant roles in ethylene-triggered leaf senescence.…”

Section: Plant Hormones That Accelerate Leaf Senescencementioning

confidence: 99%

New Advances in the Regulation of Leaf Senescence by Classical and Peptide Hormones

Huang

Guo

2022

Front. Plant Sci.

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Leaf senescence is the last stage of leaf development, manifested by leaf yellowing due to the loss of chlorophyll, along with the degradation of macromolecules and facilitates nutrient translocation from the sink to the source tissues, which is essential for the plants' fitness. Leaf senescence is controlled by a sophisticated genetic network that has been revealed through the study of the molecular mechanisms of hundreds of senescence-associated genes (SAGs), which are involved in multiple layers of regulation. Leaf senescence is primarily regulated by plant age, but also influenced by a variety of factors, including phytohormones and environmental stimuli. Phytohormones, as important signaling molecules in plant, contribute to the onset and progression of leaf senescence. Recently, peptide hormones have been reported to be involved in the regulation of leaf senescence, enriching the significance of signaling molecules in controlling leaf senescence. This review summarizes recent advances in the regulation of leaf senescence by classical and peptide hormones, aiming to better understand the coordinated network of different pathways during leaf senescence.

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“…For example, PHYTOCHROME-INTERACTING FACTOR (PIF) family proteins PIF4/5 can directly or indirectly regulate the expression of chlorophyll catabolism-related genes (CCGs; including NYC1 , PAO , and NYE1 ) and regulate darkness-induced leaf senescence ( Sanchez et al, 2020 ). The maize NAC TF ZmNAC126 acts downstream of the ethylene metabolism pathway components and activates the expression of CCGs to accelerate leaf senescence ( Yang et al, 2020 ). The MADS box family TF SOC1 directly inhibits the transcription of the CCGs NYC1 and PPH to negatively regulate leaf senescence ( Chen et al, 2017a ).…”

Section: Introductionmentioning

confidence: 99%

MdNAC4 Interacts With MdAPRR2 to Regulate Nitrogen Deficiency-Induced Leaf Senescence in Apple (Malus domestica)

et al. 2022

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Nitrogen (N) is one of the important macronutrients in plants, and N deficiency induces leaf senescence. However, the molecular mechanism underlying how N deficiency affects leaf senescence is unclear. Here, we report an apple NAC TF, MdNAC4, that participates in N deficiency-induced leaf senescence. The senescence phenotype of apple leaves overexpressing MdNAC4 was enhanced after N deficiency. Consistently, the chlorophyll content of transgenic leaves was significantly lower than that in the WT control leaves, the expression of chlorophyll catabolism-related genes (MdNYC1, MdPAO, and MdSGR1) was significantly higher than that in the WT controls, and the expression of chlorophyll synthesis-related genes (MdHEMA, MdCHLI, and MdCHLM) was significantly lower than that in the WT control leaves. Furthermore, MdNAC4 was found to directly activate the transcription of the chlorophyll catabolism-related genes MdNYC1 and MdPAO. Additionally, MdNAC4 was proven to interact with MdAPRR2 proteins both in vitro and in vivo, and overexpression of MdAPRR2 seemed to delay N deficiency-induced leaf senescence. Correspondingly, the chlorophyll loss of MdAPRR2-overexpressing (MdAPRR2-OE) lines was significantly lower than in WT control plants. Although downregulated, the expression of the chlorophyll synthesis-related genes MdHEMA, MdCHLI, and MdCHLM in the transgenic plants was more than twice that in the WT control plants. Taken together, our results enrich the regulatory network of leaf senescence induced by N deficiency through the interaction between MdNAC4 and MdAPRR2.

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The transcription factor ZmNAC126 accelerates leaf senescence downstream of the ethylene signalling pathway in maize

Cited by 36 publications

References 74 publications

Multiple Layers of Regulation on Leaf Senescence: New Advances and Perspectives

Multiple Layers of Regulation on Leaf Senescence: New Advances and Perspectives

New Advances in the Regulation of Leaf Senescence by Classical and Peptide Hormones

MdNAC4 Interacts With MdAPRR2 to Regulate Nitrogen Deficiency-Induced Leaf Senescence in Apple (Malus domestica)

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