12 results on '"Sun, Fengli"'
Search Results
2. The overexpression of the switchgrass (Panicum virgatum L.) genes PvTOC1-N or PvLHY-K affects circadian rhythm and hormone metabolism in transgenic Arabidopsis seedlings.
- Author
-
Zhang, Shumeng, Ma, Jiayang, Wang, Weiwei, Zhang, Chao, Sun, Fengli, and Xi, Yajun
- Subjects
GENE expression ,REGULATOR genes ,ABSCISIC acid ,CIRCADIAN rhythms ,SWITCHGRASS ,ARABIDOPSIS thaliana - Abstract
Switchgrass (Panicum virgatum L.) is a perennial C4 warm-season grass known for its high-biomass yield and wide environmental adaptability, making it an ideal bioenergy crop. Despite its potential, switchgrass seedlings grow slowly, often losing out to weeds in field conditions and producing limited biomass in the first year of planting. Furthermore, during the reproductive growth stage, the above-ground biomass rapidly increases in lignin content, creating a significant saccharification barrier. Previous studies have identified rhythm-related genes TOC1 and LHY as crucial to the slow seedling development in switchgrass, yet the precise regulatory functions of these genes remain largely unexplored. In this study, the genes TOC1 and LHY were characterized within the tetraploid genome of switchgrass. Gene expression analysis revealed that PvTOC1 and PvLHY exhibit circadian patterns under normal growth conditions, with opposing expression levels over time. PvTOC1 genes were predominantly expressed in florets, vascular bundles, and seeds, while PvLHY genes showed higher expression in stems, leaf sheaths, and nodes. Overexpression of PvTOC1 from the N chromosome group (PvTOC1-N) or PvLHY from the K chromosome group (PvLHY-K) in Arabidopsis thaliana led to alterations in circadian rhythm and hormone metabolism, resulting in shorter roots, delayed flowering, and decreased resistance to oxidative stress. These transgenic lines exhibited reduced sensitivity to hormones and hormone inhibitors, and displayed altered gene expression in the biosynthesis and signal transduction pathways of abscisic acid (ABA), gibberellin (GA), 3-indoleacetic acid (IAA), and strigolactone (SL). These findings highlight roles of PvTOC1-N and PvLHY-K in plant development and offer a theoretical foundation for genetic improvements in switchgrass and other crops. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Genome-wide analysis of the abiotic stress-related bZIP family in switchgrass
- Author
-
Wang, Weiwei, Wang, Yongfeng, Zhang, Shumeng, Xie, Kunliang, Zhang, Chao, Xi, Yajun, and Sun, Fengli
- Published
- 2020
- Full Text
- View/download PDF
4. Using Transcriptome Analysis to Identify Genes Involved in Switchgrass Flower Reversion
- Author
-
Wang Yongfeng, Zheng Aiquan, Sun Fengli, Li Mao, Xu Kaijie, Zhang Chao, Liu Shudong, and Xi Yajun
- Subjects
switchgrass ,floral reversion ,cytokinin ,flower maintenance ,transcriptome ,Plant culture ,SB1-1110 - Abstract
Floral reversion is a process in which differentiated floral organs revert back to vegetative organs. Although this phenomenon has been described for decades, the underlying molecular mechanisms remain unclear. In this study, we found that immature switchgrass (Panicum virgatum) inflorescences can revert to neonatal shoots when incubated on a basal medium with benzylaminopurine. We used anatomical and histological methods to verify that these shoots were formed from floret primordia through flower reversion. To further explore the gene regulation of floral reversion in switchgrass, the transcriptome of reversed, unreversed, and uncultured immature inflorescences were analyzed and 517 genes were identified as participating in flower reversion. Annotation using non-redundant databases revealed that these genes are involved in plant hormone biosynthesis and signal transduction, starch and sucrose metabolism, DNA replication and modification, and other processes crucial for switchgrass flower reversion. When four of the genes were overexpressed in Arabidopsis thaliana, vegetative growth was facilitated and reproductive growth was inhibited in transgenic plants. This study provides a basic understanding of genes regulating the floral transition in switchgrass and will promote the research of floral reversion and flower maintenance.
- Published
- 2018
- Full Text
- View/download PDF
5. Comparative transcriptome analysis provides key insights into seedling development in switchgrass (Panicum virgatum L.)
- Author
-
Zhang, Shumeng, Sun, Fengli, Wang, Weiwei, Yang, Guoyu, Zhang, Chao, Wang, Yongfeng, Liu, Shudong, and Xi, Yajun
- Published
- 2019
- Full Text
- View/download PDF
6. Genome-wide identification of members of the TCP gene family in switchgrass (Panicum virgatum L.) and analysis of their expression.
- Author
-
Zheng, Aiquan, Sun, Fengli, Cheng, Tingting, Wang, Yongfeng, Xie, Kunliang, Zhang, Chao, and Xi, Yajun
- Subjects
- *
GENE expression in plants , *TRANSCRIPTION factors , *SWITCHGRASS , *PLANT genetics , *STRIGOLACTONES , *RNA sequencing - Abstract
Teosinte branched 1/Cycloidea/Proliferating cell factor 1 (TCP) proteins belongs to a plant-specific transcription factor family that plays important roles in plant development. TCP gene-regulated plant branching occurs downstream in the strigolactone pathway. In this study, 41 TCP genes were identified in the genome of Panicum virgatum L. (switchgrass). These genes all contained the TCP conserved domain, and they belonged to two subfamilies distributed across 18 chromosomes. Analysis of gene expression using RNA-Seq data showed that 16 TCP genes were highly expressed in the inflorescence and shoot. The expression patterns of 13 selected PvTCP genes were analyzed in different tissues, and their responses to strigolactones (SLs) were examined. The selected genes were expressed differentially in a range of tissues and to application of SLs, indicating that PvTCPs were involved in a range of developmental and physiological processes. This genome-wide analysis and determination of PvTCP gene-expression patterns yielded valuable information on switchgrass development that will inform studies into improving switchgrass and other species for crop production. • 41 TCP family genes were identified from the genome of switchgrass. • PvTCP genes were differentially expressed across different tissues. • PvTCP gene expression responded to presence of the plant hormone strigolactone. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
7. PvTB1, a Teosinte Branched1 Gene Homolog, Negatively Regulates Tillering in Switchgrass.
- Author
-
Xu, Kaijie, Wang, Yongfeng, Shi, Lili, Sun, Fengli, Liu, Shudong, and Xi, Yajun
- Subjects
HOMOLOGY (Biology) ,TILLERING (Botany) ,SWITCHGRASS ,PLANT growth regulation ,TRANSGENIC plants - Abstract
Switchgrass belongs to the family Poaceae and genus Panicum, and is a highly versatile grass used for soil and water conservation, livestock production, and biomass production for energy conversion. Tillering plays an important role in determining the morphology of the aboveground parts and the final biomass yield of switchgrass. In this study, we first cloned and identified PvTB1, a teosinte branched1 ( TB1) gene homolog in switchgrass, based on its sequence similarity with the TB1 gene, which is involved in lateral branching in maize. Similar to other TB1 genes, the PvTB1 gene encoded putative transcription factors containing a basic helix-loop-helix type of DNA-binding motif called the TCP domain. Tiller emergence and development were obviously inhibited by overexpression of PvTB1 in transgenic plants, and the mutated phenotypes could be rescued using 6-benzylaminopurine. Overexpression or suppression of PvTB1 through a transgenic approach resulted in changes in tiller number, stem height, stem diameter, and biomass yield. Taken together, our results suggest that PvTB1 negatively regulates tillering in switchgrass, presumably via its expression in axillary buds. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
8. Long non-coding RNAs of switchgrass (<italic>Panicum virgatum</italic> L.) in multiple dehydration stresses.
- Author
-
Zhang, Chao, Tang, Gaijuan, Peng, Xi, Sun, Fengli, Liu, Shudong, and Xi, Yajun
- Subjects
NON-coding RNA ,SWITCHGRASS ,DEHYDRATION ,PLANT growth ,GENE ontology ,ABSCISIC acid ,PLANTS - Abstract
Background: Long non-coding RNAs (lncRNAs) play important roles in plant growth and stress responses. Studies of lncRNAs in non-model plants are quite limited, especially those investigating multiple dehydration stresses. In this study, we identified novel lncRNAs and analyzed their functions in dehydration stress memory in switchgrass, an excellent biofuel feedstock and soil-conserving plant in the Gramineae family. Results: We analyzed genome-wide transcriptional profiles of leaves of 5-week-old switchgrass plantlets grown via tissue culture after primary and secondary dehydration stresses (D1 and D2) and identified 16,551 novel lncRNAs, including 4554 annotated lncRNAs (targeting 3574 genes), and 11,997 unknown lncRNAs. Gene ontology and pathway enrichment analysis of annotated genes showed that the differentially expressed lncRNAs were related to abscisic acid (ABA) and ethylene (ETH) biosynthesis and signal transduction, and to starch and sucrose metabolism. The upregulated lncRNAs and genes were related to ABA synthesis and its signal transduction, and to trehalose synthesis. Meanwhile, lncRNAs and genes related to ETH biosynthesis and signal transduction were suppressed. LncRNAs and genes involved in ABA metabolism were verified using quantitative real-time PCR, and the endogenous ABA content was determined via high performance liquid chromatography mass spectrometry (HPLC-MS). These results showed that ABA accumulated significantly during dehydration stress, especially in D2. Furthermore, we identified 307 dehydration stress memory lncRNAs, and the ratios of different memory types in switchgrass were similar to those in
Arabidopsis and maize. Conclusions: The molecular responses of switchgrass lncRNAs to multiple dehydration stresses were researched systematically, revealing novel information about their transcriptional regulatory behavior. This study provides new insights into the response mechanism to dehydration stress in plants. The lncRNAs and pathways identified in this study provide valuable information for genetic modification of switchgrass and other crops. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
9. Transcriptional and physiological data reveal the dehydration memory behavior in switchgrass (<italic>Panicum virgatum</italic> L.).
- Author
-
Zhang, Chao, Peng, Xi, Guo, Xiaofeng, Tang, Gaijuan, Sun, Fengli, Liu, Shudong, and Xi, Yajun
- Subjects
SWITCHGRASS ,BIOMASS energy ,DEHYDRATION reactions ,ENERGY crops ,PLANT hormones - Abstract
Background: Switchgrass (
Panicum virgatum L.) is a model biofuel plant because of its high biomass, cellulose-richness, easy degradation to ethanol, and the availability of extensive genomic information. However, a little is currently known about the molecular responses of switchgrass plants to dehydration stress, especially multiple dehydration stresses. Results: Studies on the transcriptional profiles of 35-day-old tissue culture plants revealed 741 dehydration memory genes. Gene Ontology and pathway analysis showed that these genes were enriched in phenylpropanoid biosynthesis, starch and sucrose metabolism, and plant hormone signal transduction. Further analysis of specific pathways combined with physiological data suggested that switchgrass improved its dehydration resistance by changing various aspects of its responses to secondary dehydration stress (D2), including the regulation of abscisic acid (ABA) and jasmonic acid (JA) biosynthesis and signal transduction, the biosynthesis of osmolytes (l-proline, stachyose and trehalose), energy metabolism (i.e., metabolic process relating to photosynthetic systems, glycolysis, and the TCA cycle), and lignin biosynthesis. The transcriptional data and chemical substance assays showed that ABA was significantly accumulated during both primary (D1) and secondary (D2) dehydration stresses, whereas JA accumulated during D1 but became significantly less abundant during D2. This suggests the existence of a complicated signaling network of plant hormones in response to repeated dehydration stresses. A homology analysis focusing on switchgrass, maize, andArabidopsis revealed the conservation and species-specific distribution of dehydration memory genes. Conclusions: The molecular responses of switchgrass plants to successive dehydration stresses have been systematically characterized, revealing a previously unknown transcriptional memory behavior. These results provide new insights into the mechanisms of dehydration stress responses in plants. The genes and pathways identified in this study will be useful for the genetic improvement of switchgrass and other crops. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
10. Overexpression of PvSTK1 gene from Switchgrass (Panicum virgatum L.) affects flowering time and development of floral organ in transgenic Arabidopsis thaliana.
- Author
-
Xie, Kunliang, Wang, Yongfeng, Bai, Xinchen, Ye, Zi, Zhang, Chuqiu, Sun, Fengli, Zhang, Chao, and Xi, Yajun
- Subjects
- *
SWITCHGRASS , *GENETIC overexpression , *FLOWER development , *FLOWERING time , *ARABIDOPSIS thaliana , *MORPHOGENESIS , *POLLINATORS , *FLOWERING of plants - Abstract
Flowering means that the plant enters the reproductive growth stage, which is a crucial stage in the plant life cycle. Delaying flowering time to prolong vegetative growth is an important method to increase biomass yield and saccharification efficiency in switchgrass, It is of great significance to study the molecular mechanism of plant flowering and regulate the process of plant flowering in the process of biomass production. In this study, we identified 55 serine/threonine-protein kinase genes related to flower development from the switchgrass transcriptome database. Simultaneously, we cloned one of them, PvSTK1 , whose expression level and differential fold were significantly higher than other members. PvSTK1 is located on chromosome 8N and its protein was in the cell membrane, cytoplasm, and nucleus. The spatio-temporal expression analysis of the PvSTK1 in switchgrass displayed that the PvSTK1 is crucial in vegetative period, however, not in the transition to reproductive period. Overexpression of PvSTK1 in Arabidopsis resulted in down-regulation of flower-promoting genes and up-regulation of flower-suppressing genes, thereby delaying flowering. In addition, PvSTK1 caused atrophy of the ovules of the florets at the base of the inflorescence, leading to sterility of the florets. The function of PvSTK1 is to inhibit the development of floral organs, and its overexpression can prolong its vegetative period. In the future, overexpression of the PvSTK1 gene in switchgrass will change the flowering time and increase yield and utilization efficiency of biomass. • A serine/threonine-protein kinase gene, PvSTK1 , related to flower development was cloned. • Overexpression of PvSTK1 gene in Arabidopsis causes delayed flowering and floret sterility. • PvSTK1 is involved in the regulation of the photoperiod, vernalization, and autonomous pathway gene networks. • PvSTK1 makes Arabidopsis florets sterile by affecting ovule rather than anther development. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
11. Genome-wide identification, classification, and expression analysis of heat shock transcription factor family in switchgrass (Panicum virgatum L.).
- Author
-
Xie, Kunliang, Guo, Jinliang, Wang, Shaoyu, Ye, Wenjie, Sun, Fengli, Zhang, Chao, and Xi, Yajun
- Subjects
- *
HEAT shock factors , *SWITCHGRASS , *PLANT hormones - Abstract
Switchgrass is one of the most promising bioenergy crops and is generally cultivated in arid climates and poor soils. Heat shock transcription factors (Hsfs) are key regulators of plant responses to abiotic and biotic stressors. However, their role and mechanism of action in switchgrass have not been elucidated. Hence, this study aimed to identify the Hsf family in switchgrass and understand its functional role in heat stress signal transduction and heat tolerance by using bioinformatics and RT-PCR analysis. Forty-eight PvHsfs were identified and divided into three main classes based on their gene structure and phylogenetic relationships: HsfA, HsfB, and HsfC. The results of the bioinformatics analysis showed a DNA-binding domain (DBD) at the N-terminal in PvHsfs, and they were not evenly distributed on all chromosomes except for chromosomes 8 N and 8 K. Many cis-elements related to plant development, stress responses, and plant hormones were identified in the promoter sequence of each PvHsf. Segmental duplication is the primary force underlying Hsf family expansion in switchgrass. The results of the expression pattern of PvHsfs in response to heat stress showed that PvHsf03 and PvHsf2 5 might play critical roles in the early and late stages of switchgrass response to heat stress, respectively, and HsfB mainly showed a negative response to heat stress. Ectopic expression of PvHsf03 in Arabidopsis significantly increased the heat resistance of seedlings. Overall, our research lays a notable foundation for studying the regulatory network in response to deleterious environments and for further excavating tolerance genes in switchgrass. • We identified 48 heat stress transcription factors (Hsfs) from the switchgrass genome. • Most PvHsfs were distributed allelically in pairs on the two heterologous chromosomes of switchgrass. • The expansion of PvHsfs was mainly caused by chromosomal duplication and segmental duplication. • Ectopic expression of PvHsf03 (HsfA3) in Arabidopsis significantly increased heat resistance. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
12. Identification and functional characterization of a MAX2 ortholog from switchgrass (Panicum virgatum L.).
- Author
-
Cheng, Tingting, Wang, Donghua, Wang, Yongfeng, Zhang, Shumeng, Zhang, Chao, Liu, Shudong, Xi, Yajun, and Sun, Fengli
- Subjects
- *
SWITCHGRASS , *PANICUM , *PLANT genetics , *BIOMASS production , *GENE expression in plants - Abstract
Switchgrass ( Panicum virgatum L.) is a sustainable cellulosic energy crop with high biomass yield on marginal soils. Tillering, an important agronomic characteristic related to biomass production in gramineous plants, is regulated by complex interacting factors, such as plant hormones. Strigolactones (SLs) comprise a novel class of plant hormones that inhibit shoot branching. The MORE AXILLARY GROWTH2 ( MAX2 )/ DWARF 3 ( D3 )/ RAMOSUS ( RMS4 ) genes encode proteins involved in the SL signaling pathway in various plants. The switchgrass tetraploid genome likely contains two high-similarity MAX2 homologs, one of which is 6 bp longer than the other. The longest is named PvMAX2 and is the ortholog of MAX2 in Arabidopsis, D3 in rice, and RMS4 in petunia. PvMAX2 is expressed ubiquitously in switchgrass tissues, with higher expression levels observed in the stem and shoot. PvMAX2 gene expression is upregulated by GR24, a synthetic SL analog. Ectopic expression of PvMAX2 in the Arabidopsis max2 mutant rescued the dwarf and bushy phenotypes and small leaf size in the mutant, suggesting that functions of AtMAX2 in Arabidopsis are conserved in PvMAX2 . Ectopic PvMAX2 expression also restored the wild-type primary root and hypocotyl length phenotypes and restored the response to GR24. These results indicate that PvMAX2 may play an important role in switchgrass tillering through the SL pathway. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.