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Induced Pib Expression and Resistance to Magnaporthe grisea are Compromised by Cytosine Demethylation at Critical Promoter Regions in Rice

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Journal of Integrative Plant Biology 2011年第10期53卷 814-823页

作者： Yuan Li Qiong Xia Hongping Kou Dan Wang xiuyun lin Ying Wu Chunming Xu Shaochen Xing Bao Liu Key Laboratory of Molecular Epigenetics of MOE and The Institute of Genetics ＆ Cytology Northeast Normal University Changchun 130024 China Department of Agronomy Jilin Agricultural University Changchun 130118 China Center of Agribiotechnology Jilin Academy of Agricultural Sciences Changchun 130033 China

Pib is a well-characterized rice blast-resistance gene belonging to the nucleotide binding site （NBS） and leucine-rich repeat （LRR） superfamily. Expression of Pib was low under non-challenged conditions, but strongly induced by the blast-causing fungal pathogen Magnaporthe grisea, thereby conferring resistance to the pathogen. It is generally established that cytosine methylation of the promoter-region often plays a repressive role in modulating expression of the gene in question. We report here that two critical regions of the Pib promoter were heavily CG cytosine-methylated in both cultivars studied. Surprisingly, induced expression of Pib by M. grisea infection did not entail its promoter demethylation, and partial demethylation by 5-azacytidine-treatment actually reduced Pib expression relative to wild- type plants. Accordingly, the blast disease-resistance was compromised in the 5＇-azaC-treated plants relative to wild-type. In contrast, the disease susceptibility was not affected by the 5＇-azaC treatment in another two rice cultivars that did not contain the Pib gene, ruling out effects of other R genes and *** genotoxic effects by the drug-treatment as a cause for the compromised Pib-conditioned blast-resistance. Taken together, our results suggest that promoter DNA methylation plays a novel enhancing role in conditioning high-level of induced expression of the Pib gene in times of M. grisea infection, and its conferred resistance to the pathogen.

关键词： DNA methylation Magnaporthe grisea blast-resistance induced Pib expression.

Transcriptome shock in an interspecific F1 triploid hybrid of Oryza revealed by RNA sequencing

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Journal of Integrative Plant Biology 2016年第2期58卷 150-164页

作者： Ying Wu Yue Sun Xutong Wang xiuyun lin Shuai Sun Kun Shen Jie Wang Tingting Jiang Silin Zhong Chunming Xu Bao Liu Key Laboratory of Molecular Epigenetics of the Ministry of Education(MOE) Northeast Normal UniversityChangchun 130024China Jilin Academy of Agricultural Sciences Changchun 130032China State Key Laboratory of Agrobiotechnology School of Life SciencesThe Chinese University of Hong KongHong KongChina

Interspecific hybridization is a driving force in evolution and speciation of higher plants. Interspecific hybridization often induces immediate and saltational changes in gene expression, a phenomenon collectively termed ＂transcriptome shock＂. Although transcriptome shock has been reported in various plant and animal taxa, the extent and pattern of shock-induced expression changes are often highly idiosyncratic, and hence entails additional investigations. Here, we produced a set of interspecific F1 triploid hybrid plants between Oryza sativa, ssp. japonica （2n=2x=24, genome AA） and the tetraploid form of O. punctata （2n=4x =48, genome, BBCC）, and conducted RNA-seq transcriptome profiling of the hybrids and their exact parental plants. We analyzed both homeolog expression bias and overall gene expression level difference in the hybrids relative to the in silico ＂hybrids＂（parental mixtures）. We found that approximately 16% （2,541） of the 16,112 expressed genes in leaf tissue of the F1 hybrids showed nonadditive expression, which were specifically enriched in photosynthesis-related pathways. Interestingly, changes in the maternal homeolog expression, including non-stochastic silencing, were the major causes for altered homeolog expression partitioning in the F1 hybrids. Our findings have provided further insights into the tran- scriptome response to interspecific hybridization and heterosis.

关键词： Cis- and trans-regulation homeolog expression rewiring interspecific hybrid Oryza promoter divergence transcriptome shock

Literature Review of Agricultural Scale Management and Efficiency

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Asian Agricultural Research 2016年第10期8卷 1-5页

作者： xiuyun lin Chunjie QI College of Economics and Management Huazhong Agricultural University

Scale management remains the core position in entire development process of the economics and is a major issue of academic research and government concern. Focusing on related problems of agricultural scale management,this paper explored 4 aspects of past literature.( i) It defined the agricultural scale management based on economies of scale theory and changes in returns to scale.( ii) From the perspective of the returns to scale of grain production,there are changes in returns to scale of China's grain production,but the measured changes are not significant.( iii) Existing analysis on factors influencing agricultural scale management mainly includes factors influencing farmers' willingness of scale management and restrictive factors of implementation of scale management.( iv) In studies of the relationship between land management scale and production efficiency,many scholars made qualitative and quantitative analysis on land scale efficiency on the basis of economic indicators they defined,but they reached different conclusions. Finally,it summarized literature and pointed out several issues needing special attention in this field.

关键词： Scale management and efficiency Returns to scale Land productivity

Genomic mosaicism due to homoeologous exchange generates extensive phenotypic diversity in nascent allopolyploids

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National Science Review 2021年第5期8卷 23-37页

作者： Ying Wu Fan lin Yao Zhou Jie Wang Shuai Sun Bin Wang Zhibin Zhang Guo Li xiuyun lin Xutong Wang Yue Sun Qianli Dong Chunming Xu Lei Gong Jonathan F.Wendel Zhiwu Zhang Bao Liu Key Laboratory of Molecular Epigenetics of the Ministry of Education Northeast Normal University Department of Crop & Soil Sciences Washington State University Brightseed Inc. Department of Ecology Evolution& Organismal BiologyIowa State University

Allopolyploidy is an important process in plant speciation, yet newly formed allopolyploid species typically suffer from extreme genetic bottlenecks. One escape from this impasse might be homoeologous meiotic pairing, during which homoeologous exchanges(HEs) generate phenotypically variable progeny. However,the immediate genome-wide patterns and resulting phenotypic diversity generated by HEs remain largely unknown. Here, we analyzed the genome composition of 202 phenotyped euploid segmental allopolyploid individuals from the fourth selfed generation following chromosomal doubling of reciprocal F1 hybrids of crosses between rice subspecies, using whole-genome sequencing. We describe rampant occurrence of HEs that, by overcoming incompatibility or conferring superiority of hetero-cytonuclear interactions, generate extensive and individualized genomic mosaicism across the analyzed tetraploids. We show that the resulting homoeolog copy number alteration in tetraploids affects known-function genes and their complex genetic interactions, in the process creating extraordinary phenotypic diversity at the population level following a single initial hybridization. Our results illuminate the immediate genomic landscapes possible in a tetraploid genomic environment, and underscore HE as an important mechanism that fuels rapid phenotypic diversification accompanying the initial stages of allopolyploid evolution.

关键词： nascent allopolyploidy homoeologous recombination phenotypic diversity plant evolution GWAS dosage effects epistasis

Longitudinal Dyadic Analyses of Mothers' Emotion Dysregulation and Children's Emotion Dysregulation and Oppositional Defiant Symptoms among Chinese Children:Mediation by Mother-Child Relationship Quality

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Longitudinal Dyadic Analyses of Mothers' Emotion Dysregulati...

Actor–Partner Interdependence of Compassion toward Others with Qualities of Marital Relationship and Parent-Child Relationships in Chinese Families

第二十一届全国心理学学术会议

作者： Yongqiang Jiang xiuyun lin Institute of Developmental Psychology School of Psychology Beijing Normal University

This study examined whether and how mothers’ and children’s perceptions of the mother-child relationship quality mediate the longitudinal associations between mothers’ and children’s initial emotion dysregulation and children’s later emotion dysregulation and oppositional defiant disorder(ODD) symptoms. Participants were 123 Chinese children with ODD and their mothers from a three-wave(2 years apart) longitudinal study. We used the multiple informant approach and dyadic analysis approach. Results revealed that(1) mothers’ emotion dysregulation significantly related to their own concurrent perceptions of relationship quality, whereas children’s wave 1 emotion dysregulation significantly related to their own and mothers’ perceptions of relationship quality at wave 1;(2) mothers and children perceptions of relationship quality from wave 1 to wave 2 were stable but also interdependent such that ones’ wave 1 perception of relationship quality significantly influenced the other’s wave 2 perception;more importantly,(3) relationship quality mediated the longitudinal associations between mothers’ and children’s wave 1 emotion dysregulation and children’s wave 3 emotion dysregulation and ODD symptoms in an interdependent pattern. These findings have implications for family intervention targeting maternal emotion dysregulation and strengthening mothers’ and children’s subjective perceptions of the mother-child relationship quality for children with ODD.

关键词： Oppositional Defiant Disorder Emotion Dysregulation Mother-Child Relationship Quality Dyadic Analysis

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Actor–Partner Interdependence of Compassion toward Others w...

Molecular Detection of Rice Blast Resistance Genes in Major Varieties of Rice in Jilin Province

第二十一届全国心理学学术会议

作者： Yongqiang Jiang xiuyun lin Institute of Developmental Psychology School of Psychology Beijing Normal University

Relatively little is understood about the benefits of compassion within family relationship systems. In this study, we explored how men’s and women’s general, dispositional compassion toward others related to their own(actor effects) and the partners’(partner effects) marital relationship and parent-child relationships, respectively, using the Actor-Partner Interdependent Model. Participants were from a cross-sectional sample of 534 Chinese heterosexual married couples whose biological children were pupils(mean age = 9.28 year-old, SD = 1.11). Results revealed that:(a) within marital relationships, couple members’ actor effects and partner effects were found both significant;but(b) within parent-child relationships, couple members’ actor effects were significant, whereas only mothers’ partner effect of compassion on father-child relationship was significant. These findings support the benefits of couple members’ individual compassion with respect to family relationship quality. Limitations, implications and future directions are discussed.

关键词： Compassion Marital relationship Parent-child relationship Actor-Partner Interdependent Model

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Agricultural Biotechnology 2013年第6期2卷 39-43页

作者： Haibo SHEN xiuyun lin Qiang SUN Jinming WANG Rice Research Institute Jilin Academy of Agricultural Science

[ Objective] This study aimed to detect flee blast resistance genes in major varieties of rice in Jilin Province. [ Method ] Ten molecular markers closely linked with rice blast resistance genes were used for molecular identification of resistance genes in 24 rice varieties from Jilin Province. [ Result] The 24 major vari- eties of rice widely lacked in rice blast resistance genes Pib, Pil, Pikh and Pia; Pi9 gene was absent in 17 of the 24 major varieties, especially in Jijing 88 and Changbai 9 which occupied the largest cultivation area in Jilin Province ; in addition, Jijing 88 harbored five rice blast resistance genes, including Pita, Pikm, Pt2, P/-d2 and P/z. [ Conclusion] Pib, Pil, Pikh, Pia and Pi9 are the major resistance genes for improving flee blast resistance of major varieties of rice in Jilin Prov- ince.

关键词： Rice Rice blast Major varieties Resistance gene Molecular marker

Effect of Low Temperature on Germination Characteristics of Rice Cultivars

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Agricultural Biotechnology 2018年第6期7卷 89-91页

作者： Yadong ZHAO Dianfa ZHOU xiuyun lin Qiang SUN Pengzhi Li Ding Zaisong Jinming WANG Rice Research Institute Jilin Academy of Agricultural ScienceChangchun 136100China Songyuan Academy of Agricultrual Science Songyuan138000China Institute of Crop Science Chinese Academy of Agricultural SciencesBeijing 100081China

The effects of low temperature on germination characteristics of rice seeds were studied,using three rice varieties as *** results showed that the germination rate,germination energy,germination index,vigor index,shoot length and root length all reduced with the decrease of *** the treatment temperature was 10 ℃,whether or not cold-resistant varieties,the values of all parameters showed an extremely significant difference from the control'*** the stress temperature was 15 ℃,compared with the normal condition,the parameter values of the non-tolerant variety( Changbai 9) had an extremely significant difference and the germination rate,germination potential,seedling length and root length of two cold-tolerance varieties( Jisheng 202 and Tongjing 9) had little difference from the ***,the above four indicators at 15 ℃ can be considered as the evaluation indices of cold tolerance at early stage.

关键词： Rice Low-temperature stress Germination characteristic

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流动儿童心理韧性及对其城市适应的影响

中国特殊教育 2012年第12期 12-18页

作者：王中会蔺秀云中华女子学院心理系北京100101 北京师范大学发展心理研究所北京100875

心理韧性是积极心理学研究的热点问题。本研究以心理韧性和流动儿童城市适应量表作为研究工具,对流动儿童的心理韧性特点及其对城市适应影响进行探讨。结果发现,过程性因素即到京时间、转学次数和结果性因素即学校类型对流动儿童的心理... 详细信息

心理韧性是积极心理学研究的热点问题。本研究以心理韧性和流动儿童城市适应量表作为研究工具,对流动儿童的心理韧性特点及其对城市适应影响进行探讨。结果发现,过程性因素即到京时间、转学次数和结果性因素即学校类型对流动儿童的心理韧性有显著影响。到京6年以上的流动儿童在目标专注和积极认知方面显著高于到京6年以下的流动儿童。公办学校、未转学、家庭收入2000元以上的流动儿童在目标专注、情绪控制、积极认知、家庭支持、人际协助这五个方面均高于打工子弟学校、转过学、家庭收入2000以下的流动儿童。尽管流动儿童不利的过程性、结果性、其他因素对其心理韧性、城市适应有不良影响,但在同样处境不利的情况下,流动儿童的心理韧性对其城市适应有积极影响。

关键词：流动儿童心理韧性城市适应