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学者姓名:林玉玲

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Transcriptome Analysis Revealed the Regulatory Mechanism of DIMBOA Affecting Early Somatic Embryogenesis in Dimocarpus longan Lour. SCIE
期刊论文 | 2025 , 14 (3) | PLANTS-BASEL
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Abstract :

Dimocarpus longan Lour. is an evergreen tree of the genus Longan in the Sapindaceae family, native to tropical and subtropical regions. Longan embryonic development is closely related to fruit set and fruit quality. An in-depth study of the mechanism of longan embryonic development could therefore contribute to the development of the longan industry. DIMBOA is the principal compound representing benzoxazinoids (BXs), and is closely linked to auxin biosynthesis and signal transduction. Auxin is one of the crucial hormones for inducing somatic embryogenesis (SE) in plants. Previous research has shown that DIMBOA promotes morphogenesis in the early somatic embryogenesis of longan, but the specific regulatory mechanism has not yet been clarified. To elucidate the molecular mechanism by which DIMBOA affects early somatic embryogenesis in longan, we chose longan embryogenic cultures grown under 0 mg/L DIMBOA as the control group (the check, CK), and longan embryogenic cultures grown under 0.1 mg/L DIMBOA as the treatment group (D) to be analyzed by transcriptomic sequencing. A total of 478 differentially expressed genes (DEGs) are detected in check vs. D, of which 193 are upregulated and 285 are downregulated. These DEGs are significantly enriched in the biosynthetic and metabolic functions of various substances such as vitamin B6 (VB6) biosynthesis, phenylpropanoid pathways, and carbohydrate metabolism. DIMBOA affects SE processes in longan via TFs, including MYB, ZF, bHLH, LBD, NAC, WRKY, etc. After DIMBOA treatment, the expression of most of the key genes for IAA synthesis was significantly downregulated, VB6 content was significantly reduced, and H2O2 content was significantly increased. Therefore, it is suggested that DIMBOA directly or indirectly affects the H2O2 content through the VB6 metabolic pathway, thereby regulating the endogenous IAA level to modulate the early SE morphogenesis of longan.

Keyword :

DIMBOA DIMBOA Dimocarpus longan Lour. Dimocarpus longan Lour. RNA-seq RNA-seq somatic embryogenesis somatic embryogenesis vitamin B-6 vitamin B-6

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GB/T 7714 Xu, Xiaoqiong , Zhang, Chunyu , Tong, Ning et al. Transcriptome Analysis Revealed the Regulatory Mechanism of DIMBOA Affecting Early Somatic Embryogenesis in Dimocarpus longan Lour. [J]. | PLANTS-BASEL , 2025 , 14 (3) .
MLA Xu, Xiaoqiong et al. "Transcriptome Analysis Revealed the Regulatory Mechanism of DIMBOA Affecting Early Somatic Embryogenesis in Dimocarpus longan Lour." . | PLANTS-BASEL 14 . 3 (2025) .
APA Xu, Xiaoqiong , Zhang, Chunyu , Tong, Ning , Lan, Xiaoyuan , Cui, Jing , Muhammad, Awais et al. Transcriptome Analysis Revealed the Regulatory Mechanism of DIMBOA Affecting Early Somatic Embryogenesis in Dimocarpus longan Lour. . | PLANTS-BASEL , 2025 , 14 (3) .
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Transcriptomic and Metabolomic Insights into Key Genes Involved in Kinsenoside Biosynthesis in Anoectochilus roxburghii SCIE
期刊论文 | 2025 , 14 (5) | PLANTS-BASEL
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As the main active ingredient in Anoectochilus roxburghii, kinsenoside has important health and medical effects including hepatoprotective, anti-oxidant, and bacteriostasis, among others. In recent years, with the limited application of high-throughput technology to A. roxburghii, there has been no research on the key regulatory genes involved in the synthesis of kinsenoside. Therefore, we examined three species of A. roxburghii that are widely planted in mainland China and Taiwan Province, A. roxburghii cultivar 'Jian ye', Anoectochilus formosanus, and Anoectochilus burmannicus, determining the content of kinsenoside, performing transcriptomic and metabolomic sequencing, identifying UDP glycosyltransferases, and screening for UDP glycosyltransferases that may be involved in kinsenoside synthesis. The results showed that among the three species of A. roxburghii, the content of kinsenoside in A. roxburghii cv. 'Jian ye' was the highest. Transcriptome and metabolome data showed that A. roxburghii cv. 'Jian ye' and the two other species of A. roxburghii have 3702 and 5369 differentially expressed genes and 69 and 120 differentially accumulated metabolites, respectively. Meanwhile, differentially expressed genes and differentially accumulated metabolites are enriched in the glucose metabolism and hormone pathways. We also treated the A. roxburghii samples with exogenous auxin and characterized the related genes. In A. roxburghii, we identified 73 members of the UDP glycosyltransferase family. Through phylogenetic tree, transcriptome data expression profile, and qPCR analyses, we screened for members that may be involved in the synthesis of kinsenoside. In summary, the results of this study provide insights for breeding high-kinsenoside-content and high-intron varieties of A. roxburghii.

Keyword :

Anoectochilus roxburghii Anoectochilus roxburghii high-performance liquid chromatography high-performance liquid chromatography kinsenoside kinsenoside metabolite metabolite transcriptome transcriptome

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GB/T 7714 Wang, Peiyu , Yan, Peipei , Li, Zunwen et al. Transcriptomic and Metabolomic Insights into Key Genes Involved in Kinsenoside Biosynthesis in Anoectochilus roxburghii [J]. | PLANTS-BASEL , 2025 , 14 (5) .
MLA Wang, Peiyu et al. "Transcriptomic and Metabolomic Insights into Key Genes Involved in Kinsenoside Biosynthesis in Anoectochilus roxburghii" . | PLANTS-BASEL 14 . 5 (2025) .
APA Wang, Peiyu , Yan, Peipei , Li, Zunwen , Jiang, Jinlan , Lin, Yuling , Ye, Wei . Transcriptomic and Metabolomic Insights into Key Genes Involved in Kinsenoside Biosynthesis in Anoectochilus roxburghii . | PLANTS-BASEL , 2025 , 14 (5) .
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Allelic Expression Dynamics of Regulatory Factors During Embryogenic Callus Induction in ABB Banana (Musa spp. cv. Bengal, ABB Group) SCIE
期刊论文 | 2025 , 14 (5) | PLANTS-BASEL
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The regulatory mechanisms underlying embryogenic callus (EC) formation in polyploid bananas remain unexplored, posing challenges for genetic transformation and biotechnological applications. Here, we conducted transcriptome sequencing on cultured explants, non-embryogenic callus, EC, and browning callus in the ABB cultivar 'MJ' (Musa spp. cv. Bengal). Our analysis of differentially expressed genes (DEGs) revealed significant enrichment in plant hormones, MAPK, and zeatin biosynthesis pathways. Notably, most genes in the MJ variety exhibited balanced expression of the A and B alleles, but A-specific allele expression was dominant in the key signaling pathways, whereas B-specific allele expression was very rare during EC induction. In the auxin signaling pathway, six A-specific MJARF genes were markedly downregulated, underscoring their critical roles in the negative regulation of callus formation. Additionally, six A-specific MJEIN3 alleles were found to play negative regulatory roles in ethylene signaling during EC development. We also identified phenylpropanoids responsible for enzymatic browning. Furthermore, the expression patterns of transcription factors in bananas exhibited specific expression modes, highlighting the unique mechanisms of callus formation. This study enhanced our understanding of the regulatory roles of these alleles in EC induction and offers new insights into the utilization of alleles to improve the efficiency of somatic embryogenesis in bananas.

Keyword :

browning browning embryogenic callus embryogenic callus specific allele specific allele transcriptional regulation transcriptional regulation

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GB/T 7714 Zhao, Xiaobing , Zhuang, Yiting , Xie, Wangyang et al. Allelic Expression Dynamics of Regulatory Factors During Embryogenic Callus Induction in ABB Banana (Musa spp. cv. Bengal, ABB Group) [J]. | PLANTS-BASEL , 2025 , 14 (5) .
MLA Zhao, Xiaobing et al. "Allelic Expression Dynamics of Regulatory Factors During Embryogenic Callus Induction in ABB Banana (Musa spp. cv. Bengal, ABB Group)" . | PLANTS-BASEL 14 . 5 (2025) .
APA Zhao, Xiaobing , Zhuang, Yiting , Xie, Wangyang , Yang, Yixin , Pu, Jingyu , Fan, Zhengyang et al. Allelic Expression Dynamics of Regulatory Factors During Embryogenic Callus Induction in ABB Banana (Musa spp. cv. Bengal, ABB Group) . | PLANTS-BASEL , 2025 , 14 (5) .
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Global Identification and Analysis of Long Noncoding RNAs Involved in Banana Fruit Ripening SCIE
期刊论文 | 2025 , 150 (5) , 237-248 | JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE
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In the life cycle of fruit, ripening is a crucial period for the formation of fruit quality. During this phase, a series of physiological and biochemical changes occur, leading to alterations in color and texture, softening, and the production of aroma volatiles. Relevant studies have demonstrated that ethylene-induced fruit ripening is a complex regulatory network involving numerous transcription factors, ethylene receptor protein families, signal transduction pathways, and downstream maturation-related genes. In this study, we conducted a genome-scale identification and characterization of long noncoding RNAs (lncRNAs) from the predominant AAA triploid banana cultivar, 'Tianbao-jiao', using rich RNA-sequencing (RNA-seq) datasets from fruit tissues treated with ethylene and untreated controls. This represents one of the first comprehensive investigations into banana lncRNAs associated with ripening. A total of 11,268 banana fruit lncRNAs were identified and found to be distributed across all banana chromosomes; similar to 76.1% of these lncRNAs were transcribed from intergenic regions. Banana fruit lncRNAs are relatively short, with 91.32% ranging from 100 to 1000 nucleotides in length. Most contain one or two exons, contrasting with protein-coding genes, which can have one to >= 10 exons. Compared with naturally ripened bananas, many lncRNAs exhibited significant differential expression in ethylene-treated banana fruits. Furthermore, downregulating the expression of lncRNA TCONS00507247 in the peel markedly inhibited the yellowing process. These findings suggest that lncRNAs play a vital role in regulating banana fruit ripening and offer new insights into fruit ripening research.

Keyword :

banana ripening banana ripening ethylene ethylene lncRNAs lncRNAs regulation regulation RNA interference RNA interference

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GB/T 7714 Huang, Yuji , Lin, Tong , Fang, Yina et al. Global Identification and Analysis of Long Noncoding RNAs Involved in Banana Fruit Ripening [J]. | JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE , 2025 , 150 (5) : 237-248 .
MLA Huang, Yuji et al. "Global Identification and Analysis of Long Noncoding RNAs Involved in Banana Fruit Ripening" . | JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE 150 . 5 (2025) : 237-248 .
APA Huang, Yuji , Lin, Tong , Fang, Yina , Yuan, Lingfeng , Feng, Xu , Lin, Yuling et al. Global Identification and Analysis of Long Noncoding RNAs Involved in Banana Fruit Ripening . | JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE , 2025 , 150 (5) , 237-248 .
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The bZIP20 transcription factor enhances thermotolerance in Dimocarpus longan by maintaining ROS homeostasis and involving the MeJA pathway SCIE
期刊论文 | 2025 , 223 | PLANT PHYSIOLOGY AND BIOCHEMISTRY
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Abstract :

The basic-leucine zipper (bZIP) transcription factor (TF), which is abundant and highly conserved in eukaryotes, mainly participates in plant growth, development and adverse stress processes. However, the regulatory mechanisms of bZIP TFs under heat stress in Dimocarpus longan remain unclear. In this study, we reported a nuclear-localized bZIP TF, DlbZIP20, which was confirmed to be a positive regulator of thermotolerance in D. longan. It was identified as a strong interplay with hormone signalling pathways and oxidoreductase-related families. The transient overexpression DlbZIP20 could improve the thermotolerance of D. longan embryogenic callus (EC) and reduce the damage of cells under heat stress. Overexpression of DlbZIP20 in hairy roots significantly promoted roots elongation and photosystem II (PS II) responses in leaves, and significantly increased SOD and POD activities, promoted H2O2 scavenging, improved thermotolerance of D. longan by maintaining ROS homeostasis under heat stress. In addition, overexpression of DlbZIP20 increased endogenous MeJA content under heat stress. MeJA hormone synthesis genes DlMYC2 and DlCOI1 were up-regulated and DlJAZ3 was down-regulated in expression. This signalling pathway may play a role in the regulation of thermotolerance in D. longan. These results will provide a new insight into the molecular function of bZIP20 TF in response to heat stress in D. longan.

Keyword :

Abiotic stress responses Abiotic stress responses Antioxidant system Antioxidant system Hairy root culture Hairy root culture Plant hormone interactions Plant hormone interactions

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GB/T 7714 Zhai, Tingkai , Guo, Yueru , Yang, Mengmeng et al. The bZIP20 transcription factor enhances thermotolerance in Dimocarpus longan by maintaining ROS homeostasis and involving the MeJA pathway [J]. | PLANT PHYSIOLOGY AND BIOCHEMISTRY , 2025 , 223 .
MLA Zhai, Tingkai et al. "The bZIP20 transcription factor enhances thermotolerance in Dimocarpus longan by maintaining ROS homeostasis and involving the MeJA pathway" . | PLANT PHYSIOLOGY AND BIOCHEMISTRY 223 (2025) .
APA Zhai, Tingkai , Guo, Yueru , Yang, Mengmeng , Zhang, Xueying , Lin, Yiyao , Cai, Danfeng et al. The bZIP20 transcription factor enhances thermotolerance in Dimocarpus longan by maintaining ROS homeostasis and involving the MeJA pathway . | PLANT PHYSIOLOGY AND BIOCHEMISTRY , 2025 , 223 .
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Transcription factor PcERF114 is involved in the regulation of flavonoid accumulation of Polygonatum cyrtonema Hua SCIE
期刊论文 | 2025 , 230 | INDUSTRIAL CROPS AND PRODUCTS
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Polygonatum cyrtonema Hua (P. cyrtonema), a traditional medicinal herb, is renowned for its high metabolite content. Previous studies have found that APETALA2/Ethylene Responsive Factor (AP2/ERF) plays a vital role in the metabolisms of P. cyrtonema, while the regulatory mechanism of PcAP2/ERFs in the flavonoid accumulation remains unclear. A total of 53 PcAP2/ERFs were identified from the full-length transcriptome. The expression analysis of PcAP2/ERFs in different age section rhizomes and different tissue sections showed that PcERF114 was associated with flavonoid accumulation and located in the nucleus. The flavonoid content was significantly upregulated with the transient overexpression of PcERF114, and significantly down-regulated with virus-induced gene silencing of PcERF114 in the P. cyrtonema leaves. Meanwhile, an integrative analysis of transcriptome and metabolome revealed that differentially expressed genes and differentially accumulated metabolites of transgenic leaves were closely related to the flavonoid biosynthesis pathway, and PcCHS1 was identified as a flavonoid biosynthesis-related key gene by WGCNA, qRT-PCR, and KEGG analysis. Overexpression of PcERF114 in the stable transgenic hairy roots and transiently transformed rhizomes increased the PcCHS1 expression, and the transient co-transformation of overexpressing PcERF114 and PcCHS1 promoted flavonoid accumulation, suggesting that PcERF114 may affect the expression of PcCHS1, thereby promoting the flavonoid accumulation of P. cyrtonema. The results provided a reference for further functional studies of secondary metabolism biosynthesis-related genes in medicinal plants.

Keyword :

AP2/ERF AP2/ERF ERF114 ERF114 Flavonoids Flavonoids Metabolome Metabolome Polygonatum cyrtonema Hua Polygonatum cyrtonema Hua Transcriptome Transcriptome

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GB/T 7714 Wan, Kui , Yang, Fengjie , Nan, Yanlong et al. Transcription factor PcERF114 is involved in the regulation of flavonoid accumulation of Polygonatum cyrtonema Hua [J]. | INDUSTRIAL CROPS AND PRODUCTS , 2025 , 230 .
MLA Wan, Kui et al. "Transcription factor PcERF114 is involved in the regulation of flavonoid accumulation of Polygonatum cyrtonema Hua" . | INDUSTRIAL CROPS AND PRODUCTS 230 (2025) .
APA Wan, Kui , Yang, Fengjie , Nan, Yanlong , Zhang, Shuting , Huang, Zhixia , Chen, Yukun et al. Transcription factor PcERF114 is involved in the regulation of flavonoid accumulation of Polygonatum cyrtonema Hua . | INDUSTRIAL CROPS AND PRODUCTS , 2025 , 230 .
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Genome Identification, Expression Profile Analysis, and Abiotic Stress Response Mechanism of Longan BES1 Gene SCIE
期刊论文 | 2025 , 26 (7) | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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BES1 (BRI1 EMS SUPPRESSOR 1) is a critical transcription factor involved in plant growth, development, and stress responses. Although BES1 genes have been characterized in several species, their roles in longan (Dimocarpus longan Lour.) remain unclear. This study identified and analyzed eight BES1 genes in the longan genome. Phylogenetic analysis classified these genes into four subgroups (I-IV), with conserved motifs and intron-exon structures indicating potential functional similarities within subgroups. Cis-element analysis revealed that the promoters of DlBES1 genes contain numerous hormone-related elements, including ABRE, TGACG, and TCA motifs, suggesting their involvement in hormonal signaling and stress responses. Expression profiling showed differential expression patterns of DlBES1 genes across nine tissues, with notable up-regulation in roots and seeds. Additionally, DlBES1 genes exhibited distinct expression trends under varying temperatures and in response to IAA treatment, indicating potential roles in temperature stress adaptation and hormone signaling. These findings provide novel insights into the regulatory mechanisms of BES1 genes in longan and highlight their potential significance in stress tolerance and growth regulation.

Keyword :

abiotic stress abiotic stress BES1 gene family BES1 gene family Dimocarpus longan Lour. Dimocarpus longan Lour. evolutionary analysis evolutionary analysis IAA response IAA response

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GB/T 7714 Zeng, Zilu , Liu, Ronglin , Zhao, Jin et al. Genome Identification, Expression Profile Analysis, and Abiotic Stress Response Mechanism of Longan BES1 Gene [J]. | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES , 2025 , 26 (7) .
MLA Zeng, Zilu et al. "Genome Identification, Expression Profile Analysis, and Abiotic Stress Response Mechanism of Longan BES1 Gene" . | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 26 . 7 (2025) .
APA Zeng, Zilu , Liu, Ronglin , Zhao, Jin , Lan, Shuoxian , Yang, Hao , Wu, Hua et al. Genome Identification, Expression Profile Analysis, and Abiotic Stress Response Mechanism of Longan BES1 Gene . | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES , 2025 , 26 (7) .
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The ETHYLENE RESPONSE FACTOR6-GRETCHEN HAGEN3.5 module regulates rooting and heat tolerance in Dimocarpus longan SCIE
期刊论文 | 2025 , 197 (3) | PLANT PHYSIOLOGY
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Heat stress can seriously affect plant growth and development. Ethylene response factors (ERFs) play important roles in plant development and physiological responses. Here, we identified DlERF6, an ERF family transcription factor that promotes heat tolerance in Dimocarpus longan. DlERF6 was strongly induced by heat stress and IAA treatment in longan roots. Overexpression of DlERF6 generated abundant, fast-growing hairy roots and enhanced longan heat stress tolerance by promoting IAA biosynthesis and reactive oxygen species (ROS) scavenging. Additional assays indicated that DlERF6 directly binds to the DlGH3.5 promoter and represses its expression. Overexpressing DlGH3.5 reduced hairy root number, root length, and heat tolerance, concomitant with a reduction in IAA content and ROS scavenging. Collectively, these results reveal the molecular mechanism through which the DlERF6-DlGH3.5 module regulates root growth and heat stress tolerance, providing a gene network that can be used for the genetic improvement of longan. An ethylene response factor regulates longan root growth and heat tolerance by modulating reactive oxygen species and auxin homeostasis.

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GB/T 7714 Zhang, Xueying , Zhang, Shuting , Wang, Shuangjie et al. The ETHYLENE RESPONSE FACTOR6-GRETCHEN HAGEN3.5 module regulates rooting and heat tolerance in Dimocarpus longan [J]. | PLANT PHYSIOLOGY , 2025 , 197 (3) .
MLA Zhang, Xueying et al. "The ETHYLENE RESPONSE FACTOR6-GRETCHEN HAGEN3.5 module regulates rooting and heat tolerance in Dimocarpus longan" . | PLANT PHYSIOLOGY 197 . 3 (2025) .
APA Zhang, Xueying , Zhang, Shuting , Wang, Shuangjie , Ma, Wentao , Zhai, Tingkai , Gao, Jie et al. The ETHYLENE RESPONSE FACTOR6-GRETCHEN HAGEN3.5 module regulates rooting and heat tolerance in Dimocarpus longan . | PLANT PHYSIOLOGY , 2025 , 197 (3) .
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Genome-Wide Identification and Expression Analysis Unveil the Involvement of the Succinic Semialdehyde Dehydrogenase (SSADH) Gene Family in Banana Low Temperature Stress SCIE
期刊论文 | 2025 , 26 (7) | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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Banana (Musa spp.) is susceptible to low-temperature stress and other environmental stresses, which can hinder the growth and development. Succinic semialdehyde dehydrogenase (SSADH) is critical for GABA biosynthesis and plays a crucial role in plants. However, the SSADH genes of bananas have not been studied. This study found 19 MaSSADHs, 18 MbSSADHs, and 18 MiSSADHs from the banana genome. According to the phylogenetic tree, these genes can be categorized into five branches. This study cloned the MaSSADH1-14 from banana. The subcellular localization assays of MaSSADH1-14 in tobacco leaves confirmed that the presence of SSADH was not only localized mitochondrion but also localized chloroplast. The cis-elements of the SSADH gene family are related to the potential regulation of the banana SSADH gene family; their involvement in diverse stress responses. Transcriptomic data was utilized to examine the effect of MaSSADH genes under cold stress in bananas. The results of RT-qPCR were consistent with transcriptome data. These results showed that most MaSSADHs are passively responsive to low-temperature treatment. In addition, transient overexpression of MaSSADH1-14 in Nicotiana benthamiana leaves resulted in the content of GABA increasing, indicating that MaSSADH1-14 may be involved in the accumulation of GABA of banana. Collectively, these results improve knowledge of the SSADH gene family in banana and establish a basis for comprehending its biological roles in response to low temperatures.

Keyword :

banana (Musa app.) banana (Musa app.) low temperature stress low temperature stress succinic semialdehyde dehydrogenase succinic semialdehyde dehydrogenase

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GB/T 7714 Guo, Xiong , Yang, Fengjie , Zhang, Xueying et al. Genome-Wide Identification and Expression Analysis Unveil the Involvement of the Succinic Semialdehyde Dehydrogenase (SSADH) Gene Family in Banana Low Temperature Stress [J]. | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES , 2025 , 26 (7) .
MLA Guo, Xiong et al. "Genome-Wide Identification and Expression Analysis Unveil the Involvement of the Succinic Semialdehyde Dehydrogenase (SSADH) Gene Family in Banana Low Temperature Stress" . | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 26 . 7 (2025) .
APA Guo, Xiong , Yang, Fengjie , Zhang, Xueying , Tang, Mengjie , Wan, Kui , Lai, Chunwang et al. Genome-Wide Identification and Expression Analysis Unveil the Involvement of the Succinic Semialdehyde Dehydrogenase (SSADH) Gene Family in Banana Low Temperature Stress . | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES , 2025 , 26 (7) .
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Identification and verification of key metabolites in polyamine-regulated flavonoid production in longan embryogenic calli using widely targeted metabolomics SCIE
期刊论文 | 2025 , 231 | INDUSTRIAL CROPS AND PRODUCTS
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Polyamines, emerging as pivotal regulators, modulate a myriad of fundamental cellular processes and orchestrate key physiological and biochemical pathways, including putrescine, spermidine, spermine. This study explores the mechanisms by which exogenous polyamines regulate the growth and flavonoid accumulation in longan (Dimocarpus longan Lour.) embryogenic calli (EC). Here, we screened the effects of different types of polyamines and their inhibitor D-arginine in longan EC. Exogenous 10 mu mol/L spermine demonstrated superior efficacy, enhancing the fresh weight of longan EC by 12.65 % and increasing its flavonoids production rate by 26.11 % versus control. Exogenous spermine also up-regulated the expression of polyamines and flavonoids metabolism genes. Widely targeted metabolomics indicated flavonoids as predominant differential metabolites under spermine treatment, with vitexin-2 '-O-glucoside and quercetin-3-O-glucoside-7-O-rhamnoside showing the most pronounced differential accumulation. D-arginine acts mainly as inhibition. Intriguingly, exogenous 10 mu mol/L quercetin outperformed Spm and vitexin in promoting both longan EC growth (by 36.58 %) and flavonoids production rate (by 65.08 %), while concomitantly upregulating the expression of polyamines metabolism genes, suggesting a possible synergistic interaction between spermine and quercetin. Furthermore, exogenous quercetin and vitexin facilitated the development of longan EC into globular embryo. Cultivation of longan EC in a stirred bioreactor (5 L working volume) supplemented with 10 mu mol/L quercetin achieved 196.15 % higher flavonoid yield than that in solid medium, while reducing the culture duration from 30 to 9 days. This study establish a foundation for understanding the intrinsic mechanism by which polyamines regulate the growth and flavonoids accumulation in longan EC.

Keyword :

D-arginine D-arginine Flavonoids Flavonoids Longan embryogenic calli Longan embryogenic calli Quercetin Quercetin Spermine Spermine Widely targeted metabolomics Widely targeted metabolomics

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GB/T 7714 Lai, Chunwang , Zhang, Xueying , Guo, Yueru et al. Identification and verification of key metabolites in polyamine-regulated flavonoid production in longan embryogenic calli using widely targeted metabolomics [J]. | INDUSTRIAL CROPS AND PRODUCTS , 2025 , 231 .
MLA Lai, Chunwang et al. "Identification and verification of key metabolites in polyamine-regulated flavonoid production in longan embryogenic calli using widely targeted metabolomics" . | INDUSTRIAL CROPS AND PRODUCTS 231 (2025) .
APA Lai, Chunwang , Zhang, Xueying , Guo, Yueru , Tang, Mengjie , Zhou, Xiaojuan , She, Tingting et al. Identification and verification of key metabolites in polyamine-regulated flavonoid production in longan embryogenic calli using widely targeted metabolomics . | INDUSTRIAL CROPS AND PRODUCTS , 2025 , 231 .
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