Publications by authors named "Shaoshuai Yu"

Iodes seguinii is a woody vine known for its potential therapeutic applications in treating rheumatoid arthritis (RA) due to its rich bioactive components. Here, we achieved the first chromosome-level assembly of the nuclear genome of I. seguinii using PacBio HiFi and chromatin conformation capture (Hi-C) sequencing data.

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The thymidylate kinase () gene is indispensable for the proliferation and survival of phytoplasma. To reveal the molecular variation and phylogeny of the genes of phytoplasma ziziphi, in this study, the genes of 50 phytoplasma strains infecting different resistant and susceptible jujube cultivars from different regions in China were amplified and analyzed. Two sequence types, and , were identified using clone-based sequencing.

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  • * The mitochondrial genome consists of 566,285 bp with 32 protein-coding genes, 33 tRNA genes, and various types of repeats, suggesting complex genome dynamics and potential evolutionary insights.
  • * Phylogenetic analysis confirmed the genetic relationship between P. amurense and Citrus species, providing a genetic resource for studying evolutionary patterns in the Rutaceae family.
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Cyanthillium cinereum, which belongs to the family of Asteraceae, is an annual or perennial herbaceous plant with significant medicinal uses for treating colds and fever. During September to November of 2020, C. cinereum showing symptoms of witches'-broom were found in economic forests distributed in Ding'an, Hainan Province of China, with 20% incidence.

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Peony ( Andr.), belonging to family Paeoniaceae, is an important medicinal and ornamental plant. During August of each year from 2016 to 2023, peony plants at Heze city were found to exhibit leaf yellows symptoms.

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  • Praxelis clematidea is an invasive herbaceous plant found in Hainan Province, China, exhibiting severe witches'-broom symptoms indicative of a phytoplasma infection.
  • Researchers collected and analyzed samples from symptomatic and asymptomatic plants, confirming that the symptomatic plants tested positive for phytoplasma using direct PCR amplification of specific gene sequences.
  • The gene sequences obtained were identical and closely related to strains linked to major plant diseases, with a 100% identity match to specific 'Candidatus Phytoplasma asteris' strains, and were deposited in Genbank for further study.
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Phytoplasmas are phloem-limited plant pathogenic prokaryotes which can not be cultured in vitro. The pathogens could cause various plant symptoms such as witches'-broom, virescence, and leaf yellows. Ipomoea obscura is a valuable plant species belonging to the family Convolvulaceae, mainly used as a traditional Chinese medicine used to treat diseases such as dehydration and diuresis.

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Chinaberry (Melia azedarach), belonging to the family of Meliaceae, is an ornamental tree distributes across southern of China. In the autumn of 2021, In an area of 400 acres located in Wanning city of Hainan Province, a tropical island in China, with coordinates of 110°28'42.72″E, 19°2'9.

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Phytoplasmas are a group of plant prokaryotic pathogens distributed worldwide. To comprehensively reveal the diversity of the pathogens and the diseases they cause on Hainan, a tropical island with abundant biodiversity in China, a survey of phytoplasmal diseases was performed from 2009 to 2022. Herein, molecular identification and genetic analysis were conducted based on the conserved genes of phytoplasmas.

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  • Alocasia macrorrhiza, a significant landscape and medicinal plant in China, showed 40% symptomatic incidence of yellowing and wilting leaves on Hainan Island in 2022.
  • Symptoms were linked to a phytoplasma pathogen, leading researchers to collect samples for DNA analysis.
  • Through PCR amplification and sequencing, the associated phytoplasma was classified as Alocasia macrorrhiza yellows (AmY) with identical sequences, confirming its identity in GenBank.
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  • Palm is a key cash crop in Hainan Island, China, but is severely impacted by palm yellow leaf (AcYL) disease caused by phytoplasmas.
  • The study identified AcYL phytoplasmas as related to 'Phytoplasma malaysianum' from the 16SrXXXII-D subgroup, demonstrating 100% genetic similarity among the strains.
  • A new subgroup, 16SrXXXII-F, was proposed based on genetic analysis, which could help in understanding and managing the spread of AcYL disease in palm plants.
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Introduction: Rheumatoid arthritis (RA) is a systemic chronic autoimmune disease in adults that is associated with significant joint issues and systemic inflammation. One of the signs of bone damage in RA is osteoporosis (OP). Leptin is an inflammatory protein that has been reported to be related to RA.

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To reveal the distribution and transmission pathway of Paulownia witches'-broom (PaWB) disease, which is caused by phytoplasmas related to genetic variation, and the adaptability to the hosts and environments of the pathogenic population in different geographical regions in China, in this study, we used ten housekeeping gene fragments, including , , , , , , , , , and , for multilocus sequence typing (MLST). A total of 142 PaWB phytoplasma strains were collected from 18 provinces or municipalities. The results showed that the genetic diversity was comparatively higher among the PaWB phytoplasma strains, and substantially different from that of the other 16SrI subgroup strains.

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Coconut lethal yellowing (LY) diseases caused by phytoplasmas are devastating diseases for coconut cultivation and seriously threaten the coconut industry around world. The phytoplasmas associated with the LY diseases belonged to six 16Sr groups containing 16SrI, 16SrIV, 16SrXI, 16SrXIV, 16SrXXII, and 16SrXXXII with comparatively higher variable levels. Conserved regions of the 16S rRNA genes of LY phytoplasmas belonging to the six 16Sr groups were obtained in the study.

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  • The study identified and characterized pathogens linked to Huanglongbing symptoms in citrus crops on Hainan Island, focusing on phytoplasma and Liberibacter asiaticus.
  • Detection methods included analyzing gene fragments specific to these pathogens, revealing mixed infections and specific subgroups of phytoplasmas present in diseased plants.
  • This research marks the first report of 16SrII-V and 16SrXXXII-D subgroup phytoplasmas infecting citrus in China, as well as instances of co-infection with Liberibacter asiaticus.
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Carica papaya Linn, belonging to the Caricaceae family, is an economic and medicinal plant, which is widely cultivated in tropical and subtropical countries (Soib et al., 2020). Beginning in 2021, abnormal symptoms of Carica papaya exhibiting leaf yellow, crinkle and leaflet were found in Wanning city of Hainan Province, China.

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Melochia corchorifolia L. is a plant belonging to the family Sterculiaceae, extracts from this plant have been reported to inhibit melanogenesis (Yuan et al., 2020).

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Emilia sonchifolia is a medical plant belonging to the family of Asteraceae, mainly used as a traditional Chinese medicine with the function of anti-inflammatory, analgesic, antibacterial and so on. During October to November 2020, the plants showing abnormal symptoms including witches'-broom, internode shortening, leaf chlorosis and leaflet were found in Hainan province, a tropical island of China. The total DNA of the plant samples were extracted using 0.

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  • - Tephrosia purpurea, a medicinal plant with notable insecticidal properties, has been affected by a disease inducing symptoms like witches'-broom and leaf chlorosis, found to be prevalent in Hainan Province, China, with an incidence of about 60%.
  • - The disease is suspected to be caused by phytoplasma, a non-culturable prokaryotic pathogen that leads to significant economic and ecological challenges, especially in agriculture.
  • - Researchers extracted DNA from symptomatic and asymptomatic plants, successfully identifying specific gene sequences from the diseased samples, which were linked to a new strain of phytoplasma named Tephrosia purpurea witches'-broom (TpWB) that belongs to
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  • Waltheria indica L. is a medicinal plant from the Sterculiaceae family, used in China for treating rheumatism and pain, but it has recently shown signs of disease in Hainan province, with a 70% incidence affecting its growth.
  • The symptoms, including virescence and chlorosis, suggest infection by phytoplasma, a pathogen that cannot be cultured in vitro, leading to ecological and financial consequences.
  • DNA testing confirmed the presence of phytoplasma in symptomatic plants via PCR, identifying a new strain named Waltheria indica virescence (WiV), with high genetic similarity to other known phytoplasmas like the Onion yellows strain.
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Trema tomentosa (Roxb.) Hara belonging to Ulmaceae displayed abnormal symptoms including witches'-broom, internode shortening, leaf chlorosis and leaflet that affected seriously their growth causing financial loss and ecological damage in China. During August through September 2020, these plants with the symptoms were first found and collected in Dingan and Qinghai counties of Hainan province, China.

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Areca palm yellow leaf (AYL) disease caused by the 16SrI group phytoplasma is a serious threat to the development of the Areca palm industry in China. The 16S rRNA gene sequence was utilized to establish a rapid and efficient detection system efficient for the 16SrI-B subgroup AYL phytoplasma in China by loop-mediated isothermal amplification (LAMP). The results showed that two sets of LAMP detection primers, 16SrDNA-2 and 16SrDNA-3, were efficient for 16SrIB subgroup AYL phytoplasma in China, with positive results appearing under reaction conditions of 64oC for 40 min.

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Pericampylus glaucus is an important medicinal plant resource containing active components with potential antitumor activity in China (Zhao & Cui, 2009). During July through August 2020, plants displayed disease symptoms including "witches' broom", leaf chlorosis, leaflet and internode shortening that impacted their growth (Fig. 1).

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Objective: To observe the effect of traditional Chinese medicine storax on the concentration of combined western medicine sulpiride in brain and blood, discuss the effect of storax in inducing resuscitation and increasing the permeability of the gastrointestinal barrier (GB) and the blood-brain-barrier (BBB), and explore the interaction between storax and sulpiride.

Method: Rats were orally administered with the drugs for one week, probes were implanted in their brains and necks by surgery. After balance for 60 min, brain microdialysis and blood microdialysis were adopted for collect dislysates from blood in right atrum and cerebral hippocampus at time periods of 30, 60, 90, 120, 150, 180 min.

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Taxus chinensis var. mairei is an endemic and endangered plant species in China. The resources of T.

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