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Interplant communication:an emerging battlefield in plant-aphid-virus interactions

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Science China(Life Sciences) 2024年第5期67卷 1069-1071页

作者： Yunjing Wang Qian Gong yule liu MOE Key Laboratory of Bioinformatics and Center for Plant Biology School of Life SciencesTsinghua UniversityBeijing 100084China Tsinghua-Peking Center for Life Sciences Beijing 100084China

Plants constantly face threats from various organisms,including pathogens and *** the pathogens,plant viruses are obligate intracellular parasites that infect plants and cause serious crop yield losses.

关键词： plant Plants communication

Role of plant autophagy in stress response

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Protein & Cell 2011年第10期2卷 784-791页

作者： Shaojie Han Bingjie Yu Yan Wang yule liu MOE Key Laboratory of Bioinformatics School of Life SciencesTsinghua UniversityBeijing 100084China

Autophagy is a conserved pathway for the bulk degradation of cytoplasmic components in all *** process plays a critical role in the adaptation of plants to drastic changing environmental stresses such as starvation,oxidative stress,drought,salt,and pathogen *** paper summarizes the current knowledge about the mechanism and roles of plant autophagy in various plant stress responses.

关键词： plant autophagy stress response drought and salt stress pathogen

Coat protein promoter from cotton leaf curl virus is not a tissue-specifically expressed promoter

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Chinese Science Bulletin 2000年第20期45卷 1869-1874,1921-1922页

作者： XIE Yingqiu ZHU Zhen liu yule WU Qian XU Honglin Institute of Genetics Chinese Academy of SciencesBeijing 100101China Institute of Microbiology Chinese Academy of SciencesBeijing 100080China

Geminivirus is a kind of single-stranded DNA virus. Experimental results from tomato golden mosaic virus (TGMV) showed that expression pattern of coat protein gene (cp) promoter was phloem specifically expressed. In this note, the studies on cp promoter of cotton leaf curl virus (CLCuV) which is found and identified recently suggest that the promoter is not phloem specifically expressed. The expressing activity of gus gene driven by the promoter exists not only in phloem but also in mesophyll tissues and root tip meristem. Transient expression suggests that cp promoter transactivated by AC2 shows expressing activity in mesophyll and vascular tissue of leaf vein.

关键词： CLCuV promoter GUS tobacco cotton.

Graphene oxide as an antimicrobial agent can extenCthe vase life of cut flowers

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Nano Research 2018年第11期11卷 6010-6022页

作者： Yijia He Lichao Qian Xu liu Ruirui Hu Meirong Huang yule liu Guoqiang Chen Dusan Losic Hongwei Zhu State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China Center for Plant Biology and MOE Key Laboratory of Bioinformatics School of Life Sciences Tsinghua University Beijing 100084 China Department of Biology School of Life Sciences Tsinghua University Beijing 100084 China School of Chemical Engineering Engineering North Building The University of Adelaide Adelaide SA 5005 Australia

PlantNanOmics is an emerging topic in agricultural research that explores the potential effect of application of nanomaterials on plant growth. Graphene oxide (GO) has excellent properties due to its basal carbon plane and oxygen-containing functional groups. In the present work, the antimicrobial activity of GO was exploited to extend the vase life and improve the quality of cut roses (cv. Carola). The results revealed that the cut roses cultivated in low doses of GO (0.1 mg/L) had longer vase life, larger diameter, and better water relations. Microbial contaminations at the basal stem end is the most common reason for stem blockage that causes water stress and early wilting of cut flowers. GO was found to act as a germicide, effectively inhibiting the microbial growth at the cut stem end and improving water uptake and water balance of cut roses. Therefore, GO can serve as a promising preservative to increase the ornamental value of cut flowers.

关键词： graphene oxide cut flower antimicrobial water transport vase life

There is the second virus that causes tobacco leaf curl disease (not TbLCV-CHI) in the field

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Chinese Science Bulletin 2000年第12期45卷 1131-1137页

作者： GONG Qianhong liu yule HONG Yiguo WANG Huanyu CHEN Gang CAI Jianhe Microbiology Institute Chinese Academy of SciencesBeijing 100080China Institute of Plant Protection Agricultural Academy of the Guangxi Zhuang Autonomous RegionNanning 530007China

Sequence analysis of virus isolation DNA of tobacco leaf curl disease shows that there is the second geminivirus (not Chinese Tobacco Leaf Curl Virus, TbLCV-CHI) that causes tobacco leaf curl disease in the field in the Guangxi Zhuang Autonomous Region, China. This virus DNA-A contains 2 734 nt. Large intergenic region (LIR) contains 269 nt, the virus sense strand contains 2 open reading frames (ORFs): AV1 (115 aa) and AV2 (coat protein gene, CP, 256 aa), and the complementary sense strand contains 4 ORFs: AC1 (replicase gene, 361 aa), AC2 (transactivator, 134 aa), ACS (134 aa) and AC4 (97 aa). The virus belongs to one kind of subgroup III gemini- viruses from old world, and could be the Chinese tomato yellow leaf curl virus (TYLCV-CHI).

关键词： tobacco leaf curl disease geminivirus DNA sequence Chinese tomato yellow leaf curl virus (TYLCV-CHI) Chinese tobacco leaf curl virus (TbLCV-CHI).

Plant G proteins interact with endoplasmic reticulum luminal protein receptors to regulate endoplasmic reticulum retrieval

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Journal of Integrative Plant Biology 2018年第7期60卷 541-561页

作者： Shanshan Wang Ke Xie Guoyong Xu Huarui Zhou Qiang Guo Jingyi Wu Zengwei Liao Na liu Yan Wang yule liu MOE Key Laboratory of Bioinformatics Center for Plant Biology Tsinghua-Peking Center for Life Sciences School of Life Sciences Tsinghua University Beijing 100084 China Advanced Biotechnology and Application Research Center School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 China The Institute for Advanced Studies (IAS) Wuhan University Wuhan 430072 China

Maintaining endoplasmic reticulum （ER） homeostasis is essential for the production of biomolecules. ER retrieval, i.e., the retrograde transport of compounds from the Golgi to the ER, is one of the pathways that ensures ER homeostasis. However, the mechanisms underlying the regulation of ER retrieval in plants remain largely unknown. Plant ERD2-1ike proteins （ERD2s） were recently suggested to function as ER luminal protein receptors that mediate ER retrieval. Here, we demon- strate that heterotrimeric G protein signaling is involved in ERD2-mediated ER retrieval. We show that ERD2s interact with the heterotrimeric G protein Gα and Gγsubunits at the Golgi. Silencing of Gα, Gβ, or Gγ increased the retention of ER luminal proteins. Furthermore, overexpression of Gα, Gβ, or Gγ caused ER luminal proteins to escape from the ER, as did the co-silencing of ERD2a and ERD2b. These results suggest that G proteins interact with ER luminal protein receptors to regulate ER retrieval.

关键词： Chun-Ming liu Institute of Crop Science CAAS Institute of Botany CAS China

Discovery and demonstration of small circular DNA molecules derived from Chinese tomato yellow leaf curl virus

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Chinese Science Bulletin 2000年第15期45卷 1417-1421页

作者： YIN Qinyan ZHANG Ying ZHANG Yuman liu yule ZHANG Zhongze TIAN Po Departmenl of Molecular Virology and Bioengineering Institute of MicrobiologyChinese Academy of SciencesBeijing 100080China Department of Microbiology Institute of Applied EcologyChinese Academy of SciencesShenyang 110015China

Tomato yellow leaf curl viruses belong to Begomoviruses of geminiviruses. In this work, we first found and demonstrated that the small circular DNA molecules were derived from Chinese tomato yellow leaf curl viruses (TYLCV-CHI). These small circular DNA molecules are about 1.3 kb, which are half the full-length of TYLCV-CHI DNA A. It was shown by sequence determination and analysis that there was unknown-origin sequence insertion in the middle of the small molecules. These sequences of unknown-origin were neither homologous to DNA A nor to DNA B, and were formed by recombination of virus DNA and plant DNA. Although various defective molecules contained different unknown-origin sequence insertion, all the molecules contained the intergenic region and part of the AC1 (Rep) gene. But they did not contain full ORF.

关键词： geminiviruses tomato yellow leaf curl viruses genome subgene.

Transcriptional and post‑transcriptional regulation of RNAi‑related gene expression during plant‑virus interactions

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Stress Biology 2022年第1期2卷 287-298页

作者： Qian Gong Yunjing Wang Zhenhui Jin Yiguo Hong yule liu MOE Key Laboratory of Bioinformatics and Center for Plant Biology School of Life SciencesTsinghua UniversityBeijing 100084China Tsinghua-Peking Center for Life Sciences Beijing 100084China Research Centre for Plant RNA Signaling College of Life and Environmental SciencesHangzhou Normal UniversityHangzhou 311121China School of Science and the Environment University of WorcesterWorcester WR26AJUK School of Life Sciences University of WarwickCoventry CV47ALUK

As sessile organisms,plants encounter diverse invasions from pathogens including *** survive and thrive,plants have evolved multilayered defense mechanisms to combat virus ***,also known as RNA silencing,is an across-kingdom innate immunity and gene regulatory *** framework and crucial roles of RNAi in antiviral defense have been ***,it is largely unknown that how RNAi is transcriptionally regulated to initiate,maintain and enhance cellular silencing under normal or stress ***,insights into the transcriptional and post-transcriptional regulation of RNAi-related genes in different physiological processes have been *** this review,we integrate these new findings to provide updated views on how plants modulate RNAi machinery at the(post-)transcriptional level to respond to virus infection.

关键词： Transcriptional regulation RNAi Gene expression Virus Plant immunity

Expression of human hepatitis C virus core antigen in tobacco plants by tobacco mosaic virus-based vector system

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Chinese Science Bulletin 2000年第1期45卷 44-48页

作者： HAN Aidong liu yule XIAO Li KANG Liangyi ZHANG Yuman LI Dongtian TIAN Bo Institute of Microbiology Chinese Academy of SciencesBeijing 100080China Tianjin Medical University Tianjin 300070China

Tobacco mosaic virus (TMV) has the potential to highly express foreign gene. A novel TMV-based in trans expression system was constructed. A TMV mutant TSHc had its coat protein replaced with hepatitis C vir黶 (HCV) core antigen gene. Anotherr TMV mutant TSBD was repli-case-defective. Coinfection of the two mutants could cause systemic infection in tobacco plants by in trans complementation of their functions. TSHc could effectively replicate and assemble to viral particles, which were a little longer than that of wild-type TMV. HCV core antigen was expressed in whole tobacco plants. A similar expression level of HCV core antigen was detected on serial passages, which suggested that this viral expression system be stable.

关键词： TMV vector complementation systemic infection HCV core antigen.