Publications by authors named "Yufen Bu"

Plant hormones are essential and structurally diverse molecules that regulate various aspects of plant growth, development, and stress responses. However, the precise analysis of plant hormones in complex biological samples poses a challenge due to their low concentrations, dynamic levels, and intricate spatial distribution. Moreover, the complexity and interconnectedness of hormone signaling networks make it difficult to simultaneously trace multiple hormone spatial distributions.

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  • Phytohormones are crucial for plant physiology but are often present in low concentrations, complicating their detection and study using MALDI-MSI due to matrix selection issues.* * A new MALDI matrix, 2,4-Dihydroxy-5-nitrobenzoic acid (DHNBA), shows enhanced sensitivity for detecting and imaging various phytohormones compared to the traditional matrix, 2,5-dihydroxybenzoic acid (DHB).* * DHNBA’s unique properties allow for better tracking of phytohormone biosynthesis pathways and understanding their specific roles in plant tissues, thereby advancing research in plant science.*
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  • The endoplasmic reticulum (ER) and plasma membrane (PM) form contact sites (EPCSs) for exchanging materials and information, but their role in ER stress in plants is unclear.
  • A study created a triple mutant in Arabidopsis thaliana lacking key VAP27 proteins, leading to disrupted ER-PM connectivity and increased unfolded protein response (UPR) signaling.
  • The research highlights VAP27-1's role in EPCS remodeling under ER stress and identifies that calcium homeostasis significantly influences UPR signaling, shedding light on plant stress resistance mechanisms.
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The transition from deep dormancy to seed germination is essential for the life cycle of plants, but how this process occurs in the gymnosperm Chinese yew (Taxus chinensis var mairei), the natural source of the anticancer drug paclitaxel, remains unclear. Herein, we analyse the transcriptome, proteome, spatial metabolome, and spatial lipidome of the Chinese yew and present the multi-omics profiles of dormant and germinating seeds. Our results show that abscisic acid and gibberellic acid 12 homoeostasis is closely associated with gene transcription and protein translation, and the balance between these phytohormones thereby determines if seeds remain dormant or germinate.

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Long noncoding RNAs (lncRNAs) play essential roles in numerous biological processes in plants, such as regulating the gene expression. However, only a few studies have looked into their potential functions in xylem development. High-throughput sequencing of P.

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  • The NRAMP gene family is crucial for managing essential nutrients and toxic metals in plants, but more research is needed on its role in tree species.
  • In the study, 11 NRAMP genes were identified in Populus trichocarpa and categorized into three groups through phylogenetic analysis, with varied distribution across six chromosomes.
  • The research demonstrated that several PtNRAMP genes can transport metals like cadmium, and certain genes help with manganese and iron uptake, highlighting their potential in enhancing nutrient availability and cleaning up contaminated soils.
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  • Plant AT-rich sequence and zinc-binding (PLATZ) proteins are critical for plant development and resistance, but their role in heavy metal tolerance has not been explored extensively, especially in tree species like Populus trichocarpa.
  • The study identified 18 PtPLATZ genes in Populus, classifying them into five groups, and revealed they respond significantly to heavy metal stress, particularly cadmium (Cd).
  • Transgenic expression of PtPLATZ3 improved Cd tolerance and accumulation in Populus, suggesting its potential use in enhancing phytoremediation strategies.
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The interaction between the receptor-like kinase (RLK) FERONIA (FER) and the secreted peptide RAPID ALKALINIZATION FACTOR1 (RALF1) is vital for development and stress responses in Ligand-induced membrane dynamics affect the function of several RLKs, but the effects of the RALF1-FER interaction on the dynamics of FER and the ensuing effects on its functionality are poorly understood. Here, we show that RALF1 modulated the dynamics and partitioning of FER-GFP at the plasma membrane (PM). Moreover, FER was internalized by both clathrin-mediated endocytosis (CME) and clathrin-independent endocytosis (CIE) under steady-state conditions.

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Cedar-apple rust ( Miyabe) is a fungal disease that causes substantial injury to apple trees and results in fruit with reduced size and quality and a lower commercial value. The molecular mechanisms underlying the primary and secondary metabolic effects of rust spots on the leaves of apple cultivars are poorly understood. Using HPLC, we found that the contents of flavonoid compounds, especially anthocyanin and catechin, were significantly increased in rust-infected symptomatic tissue (RIT).

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Flavonoid biosynthesis has received much attention concerning the structural genes and expression of the associated transcription factors (TFs). In the present study, we examined the gene expression patterns for petals of three colors using a statistical method. Factor analysis was successfully used to examine the expression patterns most present during regulation.

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Fruit pigment accumulation, which represents an important indicator of nutrient quality and appearance value, is often affected by low light under rain, cloud, fog and haze conditions during the veraison period. It is not known whether continuous low light interferes with the production and accumulation of secondary metabolites in veraison fruit. In this paper, we measured pigments and the transcriptional level of genes related to secondary metabolites, i.

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Plant growth can be promoted by the application of apple fruit fermentation (AFF), despite unclear of the underlying mechanisms, the effects involved in AFF on rhizosphere microorganisms have been hypothesized. We investigated the consequences of applying AFF alone or in combination with Bacillus licheniformis to strawberry tissue culture seedlings in vitro, the analyses of Denaturing Gradient Gel Electrophoresis (DGGE) and 16S rDNA were performed to determine AFF effects on rhizosphere. Moreover, the growth index and antioxidant enzyme activities were determined 30 days after treatments.

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Objective: To investigate the changes of perioperative serum levels of interleukin-6 (IL-6), C-reactive protein (CRP), and cortisol, as well as gastric intramucosal pH (pHi) and plasma lactate, aiming to compare systemic changes and tissue perfusion during colorectal and orthopaedic surgical procedures.

Methods: Twenty patients were randomly assigned to two groups, 10 cases of operation on vertebral canal, 10 cases of colorectal radical operation. Venous blood was drawn at 1 day before operation, 2, 4, and 6 hours following skin incision, and 1 day after operation, in order to measure serum IL-6, CRP, and cortisol.

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Objective: To explore the changes of orexin A and neuropeptide (NPY) in plasma and hypothalamus of rats with chronic renal failure (CRF).

Methods: 41 male Wister rats weighing 200 approximately 250 g were randomly divided into three groups: normal group, sham operation group, and CRF group (with the right kidney and 2/3 of the left kidney resected). A certain number of rats were decapitated 4, 8,and 12 weeks after respectively.

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