Publications by authors named "Chen Quanjia"

As one of the key enzymes in the metabolic pathway of phenylpropane, shikimate hydroxycinnamoyl transferase (HCT) is mainly involved in the biosynthesis of the plant secondary cell wall, which is closely related to cotton fiber quality. In this study, whole-genome identification and bioinformatics analysis of the HCT gene family were performed in G. barbadense.

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The GhEB1C gene of the EB1 protein family functions as microtubule end-binding protein and may be involved in the regulation of microtubule-related pathways to enhance resistance to Verticillium wilt. The expression of GhEB1C is induced by SA, also contributing to Verticillium wilt resistance. Cotton, as a crucial cash and oil crop, faces a significant threat from Verticillium wilt, a soil-borne disease induced by Verticillium dahliae, severely impacting cotton growth and development.

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Cotton seeds, as the main by-product of cotton, are not only an important raw material for edible oil and feed but also a source of biofuel. The quality of cotton seeds directly affects cotton planting and is closely related to the yield and fiber quality. However, the molecular mechanism governing cotton seed size remains largely unexplored.

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Drought stress significantly affects the growth, development, and yield of cotton, triggering the response of multiple genes. Among them, ascorbate peroxidase (APX) is one of the important antioxidant enzymes in the metabolism of reactive oxygen species in plants, and APX enhances the ability of plants to resist oxidation, thus increasing plant stress tolerance. Therefore, enhancing the activity of APX in cells is crucial to improving plant stress resistance.

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DUSPs, a diverse group of protein phosphatases, play a pivotal role in orchestrating cellular growth and development through intricate signaling pathways. Notably, they actively participate in the MAPK pathway, which governs crucial aspects of plant physiology, including growth regulation, disease resistance, pest resistance, and stress response. DUSP is a key enzyme, and it is the enzyme that limits the rate of cell metabolism.

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Cotton is a critical crop with massive economic implications worldwide. Verticillium wilt is a soil-borne ailment caused by , which harms the growth and development of cotton. Therefore, investigating the genes associated with resistance to verticillium wilt is of particular significance.

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Article Synopsis
  • Chromatin remodelers play a crucial role in regulating plant growth and stress responses, with a focus on a novel factor, HIT4, that has been under-researched in cotton's abiotic stress resilience.
  • A comprehensive analysis identified 18 HIT4 gene family members across four cotton species, highlighting their evolutionary relationships, genomic locations, and response to stress using various bioinformatics techniques.
  • Experimental results indicated that overexpressing HIT4 in tobacco led to enhanced disease resistance, suggesting its potential role in cotton's defense mechanisms against diseases like Verticillium wilt.
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Gossypium barbadense, which is one of several species of cotton, is well known for its superior fiber quality. However, the genetic basis of its high-quality fiber remains largely unexplored. Here, we resequenced 269 G.

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Background: Focusing on key indicators of drought resistance is highly important for quickly mining candidate genes related to drought resistance in cotton.

Results: In the present study, drought resistance was identified in drought resistance-related RIL populations during the flowering and boll stages, and multiple traits were evaluated; these traits included three key indicators: plant height (PH), single boll weight (SBW) and transpiration rate (Tr). Based on these three key indicators, three groups of extreme mixing pools were constructed for BSA-seq.

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  • DVL is a small polypeptide crucial for plant growth, helping with tissue differentiation and responding to stress, but its role in cotton has not been fully analyzed until now.
  • A comprehensive study using bioinformatics identified 117 DVL genes across four cotton species and revealed five distinct subfamilies, mapping their structure and evolutionary relationships.
  • The research demonstrated that certain DVL genes are linked to fuzz development in cotton and may contribute to resistance against environmental stress, further supported by various technologies like RNA-seq and VIGS.
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A-galactosidases (AGALs), the oligosaccharide (RFO) catabolic genes of the raffinose family, play crucial roles in plant growth and development and in adversity stress. They can break down the non-reducing terminal galactose residues of glycolipids and sugar chains. In this study, the whole genome of AGALs was analyzed.

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  • Upland cotton is a key crop for the textile industry, but improving both fiber quality and yield is challenging due to their negative correlations under current breeding conditions.
  • The study aimed to identify quantitative trait loci (QTLs) to understand how they influence fiber quality and yield using a detailed genetic map of a specific cotton population.
  • Results showed the identification of 295 QTLs, including stable ones linked to fiber traits and candidate hub genes; notably, the gene GhCesA4 was found to enhance fiber length and strength while reducing lint percentage.
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Background: Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is the central enzyme of glycolysis and plays important regulatory roles in plant growth and development and responses to adverse stress conditions. However, studies on the characteristics and functions of cotton GAPDH family genes are still lacking.

Methods: In this study, genome-wide identification of the cotton GAPDH gene family was performed, and the phylogeny, gene structures, promoter progenitors and expression profiles of upland cotton GAPDH gene family members were explored by bioinformatics analysis to highlight potential functions.

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Fiber quality traits, especially fiber strength, length, and micronaire (FS, FL, and FM), have been recognized as critical fiber attributes in the textile industry, while the lint percentage (LP) was an important indicator to evaluate the cotton lint yield. So far, the genetic mechanism behind the formation of these traits is still unclear. Quantitative trait loci (QTL) identification and candidate gene validation provide an effective methodology to uncover the genetic and molecular basis of FL, FS, FM, and LP.

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Article Synopsis
  • - Duplication events in plant evolution allow genes to develop new functions, particularly in the context of flavonoids that play a role in plant defense and development.
  • - The study focuses on four paralogous genes in cotton, examining their expressions and roles in resistance to Fusarium wilt, revealing a cooperative interaction among these genes to enhance disease resistance.
  • - Findings suggest a mechanism where endogenous salicylic acid and methyl jasmonate regulate flavonoid metabolism, providing insights into plant gene evolution and potential applications in molecular breeding.
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Drought stress has a serious impact on the growth and development of cotton. To explore the relevant molecular mechanism of the drought stress response in cotton, gene mapping based on the QTL interval mapped by simplified genome BSA-seq of the drought-resistance-related RIL population was performed. A QTL region spanning 2.

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  • Heat stress negatively impacts plant growth and crop yield, but heat shock proteins (HSPs) help mitigate cell damage from high temperatures.
  • This study analyzed the relationship between heat tolerance and specific genetic markers in cotton (GhHSP70-26 promoter) to discover potential markers for breeding heat-resistant varieties.
  • The findings identified a beneficial genetic variation (Del22 bp) that enhances GhHSP70-26 expression and heat tolerance in cotton, offering insights for developing heat-resistant crops.
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  • - The study identified 42 members of the Nitrate Transporter 2 (NRT2) family in four cotton species and analyzed their genetic and physical characteristics, confirming they are primarily hydrophobic proteins on the cytoplasmic membrane.
  • - Phylogenetic analysis revealed that NRT2 genes can be categorized into three groups, sharing similar structures and motifs, while their expression patterns indicate involvement in responses to plant hormones, abiotic stress, and light.
  • - The NRT2 genes were found to be highly expressed in cotton roots and showed significant changes under drought, salt, and temperature stress, suggesting their important role in nitrogen uptake and stress response in cotton plants.
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Introduction: Starch metabolism is involved in the stress response. Starch synthase (SS) is the key enzyme in plant starch synthesis, which plays an indispensable role in the conversion of pyrophosphoric acid to starch. However, the SS gene family in cotton has not been comprehensively identified and systematically analyzed.

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Article Synopsis
  • - Cotton is a vital crop, where its fiber is a long structure that grows from the outer part of a seed, known as the ovule, and involves specific genes for its development.
  • - Research identified and categorized trichome-related genes in four cotton species, focusing particularly on one group that influences fiber traits such as lint percentage.
  • - Experiments showed that enhancing a specific gene's expression resulted in more trichomes, suggesting its key role in fiber growth, while also revealing potential gene interactions that could aid in cotton breeding efforts.
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The fiber length-related qFL-A12-5 identified in CSSLs introgressed from Gossypium barbadense into Gossypium hirsutum was fine-mapped to an 18.8 kb region on chromosome A12, leading to the identification of the GhTPR gene as a potential regulator of cotton fiber length. Fiber length is a key determinant of fiber quality in cotton, and it is a key target of artificial selection for breeding and domestication.

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The increasing water scarcity associated with environmental change brings significant negative impacts to the growth of cotton plants, whereby it is urgent to enhance plant tolerance to drought. Here, we overexpressed the gene isolated from the desert plant in cotton plants. We obtained three OE plants and demonstrated that confers drought tolerance in cotton after subjecting transgenic seeds and plants to drought.

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Article Synopsis
  • Chloroplasts in eukaryotic photosynthetic organisms are essential not just for photosynthesis but also for signal transduction, and the study focuses on a cotton mutant (VAR) that demonstrates altered chloroplast development due to environmental and genetic factors.* -
  • The VAR mutant displays a dominant phenotype with smaller vascular bundles, thinner grana thylakoid stacking, and increased starch granules compared to the wild type (WT), indicating significant structural changes in chloroplasts.* -
  • Transcriptome analysis suggests that the VAR plant's altered photosynthesis involves increased expression of the GhFTSH5 gene and changes in its promoter sequence, providing a basis for further research on the molecular mechanisms behind cotton variegated phenotypes.*
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Article Synopsis
  • The research focuses on subtilisin-like proteases (SBTs), a unique family of serine peptidases found in plants, specifically analyzing them in cotton for the first time.
  • Through bioinformatics, the study identified 120 SBTs in upland cotton (G. hirsutum) and grouped them into five subfamilies, while also noting SBT counts in other cotton species.
  • The gene GhSBT27A was identified and studied, revealing its role in the plant's response to drought stress, setting the stage for further exploration of drought mechanisms in cotton.
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