Role of a ZF-HD Transcription Factor in miR157-Mediated Feed-Forward Regulatory Module That Determines Plant Architecture in Arabidopsis

Lee, Young Koung; Kumari, Sunita; Olson, Andrew; Hauser, Felix; Ware, Doreen

doi:10.3390/ijms23158665

Cited by 7 publications

(3 citation statements)

References 72 publications

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“…NnZHD9 is a member of the Zinc‐Finger homeodomain (ZF‐HD) family and contains a highly conserved HD domain (Zhou et al., 2021). Several studies on model plants have shown that ZF‐HD is specifically expressed in flower tissues and plays an important role in young flowers (He et al., 2022; Lee et al., 2022). Members of the ZF‐HD gene family often act as upstream regulators of plant growth, development and abiotic stress tolerance (Shi et al., 2023).…”

Section: Discussionmentioning

confidence: 99%

NnSnRK1‐NnATG1‐mediated autophagic cell death governs flower bud abortion in shaded lotus

Li,

Xu,

Wei

et al. 2023

The Plant Journal

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SUMMARYMany plants can terminate their flowering process in response to unfavourable environments, but the mechanisms underlying this response are poorly understood. In this study, we observed that the lotus flower buds were susceptible to abortion under shaded conditions. The primary cause of abortion was excessive autophagic cell death (ACD) in flower buds. Blockade of autophagic flux in lotus flower buds consistently resulted in low levels of ACD and improved flowering ability under shaded conditions. Further evidence highlights the importance of the NnSnRK1‐NnATG1 signalling axis in inducing ACD in lotus flower buds and culminating in their timely abortion. Under shaded conditions, elevated levels of NnSnRK1 activated NnATG1, which subsequently led to the formation of numerous autophagosome structures in lotus flower bud cells. Excessive autophagy levels led to the bulk degradation of cellular material, which triggered ACD and the abortion of flower buds. NnSnRK1 does not act directly on NnATG1. Other components, including TOR (target of rapamycin), PI3K (phosphatidylinositol 3‐kinase) and three previously unidentified genes, appeared to be pivotal for the interaction between NnSnRK1 and NnATG1. This study reveals the role of autophagy in regulating the abortion of lotus flower buds, which could improve reproductive success and act as an energy‐efficient measure in plants.

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Section: Discussionmentioning

confidence: 99%

NnSnRK1‐NnATG1‐mediated autophagic cell death governs flower bud abortion in shaded lotus

Li,

Xu,

Wei

et al. 2023

The Plant Journal

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“…Zinc finger homeodomain TFs (ZF-HD TFs) with notably HB34 have been identified as regulators of plant architecture. Indeed, HB34 positively regulates SPL10 while repressing MIR157d thus forming a feed-forward loop (FFL) (Lee et al, 2022). FFL are three-component patterns where a TF regulates the two other components that are already involved in regulatory interactions (Figure 2).…”

Section: Mirna Integration In Developmental Gene Regulatory Networkmentioning

confidence: 99%

Plant miRNA integrated functions in development and reproduction

Arnaud,

Laufs

2023

Front. Plant Physiol.

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Plant development and reproduction are complex processes during which an individual fulfills its life cycle, starting from germination and the elaboration of new organs and growth, leading to the formation of reproductive structures and ultimately terminating in the production of the next generation. These mechanisms are the result of a long evolutionary history that has led to sophisticated regulatory mechanisms involving multiple levels of regulators. MicroRNAs (miRNAs) are a class of small regulatory molecules that play a pivotal role in regulatory networks by negatively controlling target genes. Since miRNA very first identification twenty years ago, they have attracted much interest for their role as essential regulators of plant development. In this review, we propose a comprehensive and critical analysis of the importance of miRNAs during plant development and reproduction. We begin by presenting the current understanding of miRNAs’ evolutionary history, biogenesis, mode of action, position in regulatory networks, and their potential as mobile molecules, exploring how these aspects contribute to their functions in plant development and reproduction. Then, we explore the genetic strategies employed to effectively analyze their roles, with an emphasis on recent advancements resulting from genome editing techniques. Next, we focus on miRNA contributions to four crucial processes: growth, organ patterning and identity, life cycle progression and reproduction. Through this analysis, the importance of miRNAs during plant development and reproduction emerges, which we finally discuss in light of the current view miRNAs’ roles during animal development.

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“…Among the factors accounting for plant leaf rolling are proteins related to cell wall, particularly secondary cell wall biosynthesis or formation (Zhu et al, 2022b;De Souza et al, 2023). It has recently been discovered that SQUAMOSA PROMOTER BINDING PROTEIN-LIKE 10 (SPL10), which is characterized to be functionally associated with cell wall development (Bascom, 2023), is a direct downstream target of HB34 (Lee et al, 2022). Collectively, HB34 in our study thus may participate in negatively controlling cell wall development and thereby affect leaf rolling and (possibly) lengthening during PSD, which may consequently lead to enhanced transpiration and thereafter water loss.…”

Section: Genetic Factors Coordinate the Phenotypic Responses To Combi...mentioning

confidence: 72%

Deciphering acclimation strategies to combined abiotic stresses in Arabidopsis thaliana

Jiang

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Plants grown in natural or agricultural environments are frequently exposed to abiotic stress and their combinations. Research on plant stress resilience usually focusses on single environmental stressors mostly imposed at a lethal severity. However, plant responses to sublethal abiotic stress combinations are often distinct from either stress applied in isolation. Investigating acclimation strategies mediating relevant stress combinations is therefore essential. In this thesis we studied the morphological, physiological, and molecular mechanisms underlying the acclimation responses of the model plant Arabidopsis thaliana to combined or sequential abiotic stresses. We focused on i) combined high temperature and drought and ii) flooding followed by drought, both of which are relevant in natural and agricultural settings and have already - and will further - increase in frequency due to climate change. We uncovered the unique phenotypic and molecular signatures of plant responses to combinatorial stresses in comparison with the corresponding single stresses and identified key molecular processes and putative candidate regulators mediating the acclimation responses. These putative regulators were further validated for their functions in plant growth, development, and physiology under combined or sequential stresses. Additionally, we described a novel role for the transcription factor GOLDEN2-LIKE 2 in thermomorphogenesis. The results presented in this thesis provide a comprehensive understanding of plant acclimation mechanisms to complex environmental challenges, which can potentially contribute to the development of climate change-resilient field crops.

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Role of a ZF-HD Transcription Factor in miR157-Mediated Feed-Forward Regulatory Module That Determines Plant Architecture in Arabidopsis

Cited by 7 publications

References 72 publications

NnSnRK1‐NnATG1‐mediated autophagic cell death governs flower bud abortion in shaded lotus

NnSnRK1‐NnATG1‐mediated autophagic cell death governs flower bud abortion in shaded lotus

Plant miRNA integrated functions in development and reproduction

Deciphering acclimation strategies to combined abiotic stresses in Arabidopsis thaliana

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