丁兆军
博士 教授 博士生导师
山东大学 生命科学学院
以模式植物拟南芥和玉米等作物为材料,研究植物根的可塑性生长发育及逆境适应: (1)研究根尖干细胞维持和分化的分子机制;(2)研究植物根的可塑性生长发育,包括植物在非生物逆境(盐胁迫,干旱胁迫,铝胁迫,铬胁迫等)条件下根生长发育的调控机理;(3)根际微生物和植物逆境适应研究及应用
个性化签名
- 姓名:丁兆军
- 目前身份:在职研究人员
- 担任导师情况:博士生导师
- 学位:博士
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学术头衔:
博士生导师
- 职称:高级-教授
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学科领域:
植物细胞学
- 研究兴趣:以模式植物拟南芥和玉米等作物为材料,研究植物根的可塑性生长发育及逆境适应: (1)研究根尖干细胞维持和分化的分子机制;(2)研究植物根的可塑性生长发育,包括植物在非生物逆境(盐胁迫,干旱胁迫,铝胁迫,铬胁迫等)条件下根生长发育的调控机理;(3)根际微生物和植物逆境适应研究及应用
丁兆军,博士生导师、山东大学 “齐鲁学者”特聘教授、国家“高层次青年人才” 获得者、国家 “优秀青年科学基金”获得者、山东省“杰出青年科学基金”获得者、“青岛市科技创新领军人才” 。
1998年毕业于聊城大学;2003年于中国科学院植物研究所获博士学位;2004-2011年8月, 先后在德国马普植物育种所和比利时根特大学博士后研究。2011年9月至今,山东大学教授。
以模式植物拟南芥和玉米等作物为材料,研究植物根的可塑性生长发育及逆境适应: (1)研究根尖干细胞维持和分化的分子机制;(2)研究植物根的可塑性生长发育,包括植物在非生物逆境(盐胁迫,干旱胁迫,铝胁迫,铬胁迫等)条件下根生长发育的调控机理;(3)根际微生物和植物逆境适应研究及应用;近年来,先后在embo j., nat. communications, pnas,mol. plant, plant cell, embo reports, cell reports, new phytologist, plos genet,plant biotechnol j., plant physi., plant j., trends in plant science等学术主流期刊发表60多篇学术论文,被引用2500多次。其中通讯或共同通讯作者发表论文30余篇,总影响因子大于300,应邀多次在国际著名总述性期刊trends in plant science撰写论文,其中一篇被收录于cell的 “2015聚焦中国植物科学”。目前,该研究团对和比利时根特大学,英国约克大学,奥地利维也纳科学技术研究中心,捷克马萨里克大学和以色列特拉维夫大学建立了良好的国际合作关系。2020年获得山东省自然科学一等奖(第二位);2020年获得山东省农业科学院科学技术一等奖(第二位)。
中国细胞学会植物器官分会副会长,中国植物学会工作委员会委员,山东遗传学会副理事长,山东植物学会和山东植物生理学会常务理事;frontiers in plant science副主编,植物学报和jipb等杂志编委。
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2021-05-08
plant cell reports,2020,40():59–68(
2020年10月03日
bacteria produce a wide variety of volatiles, some of which can support and others can damage plant growth. it is a controversial issue whether co2 or other bacterial volatile compounds promote plant growth in sealed systems. co2 is critical for photosynthesis. here, we show that co2 is a key constituent of the plant growth-promoting volatiles generated by bacteria in a sealed system. we revealed that the growth of arabidopsis seedlings in an airtight container was retarded due to insufficient supply of the co2. when either co2 was introduced into the container, or the seedlings were co-cultured along with certain bacterial species, the plants’ growth was restored. conclusion: the benefit of co-culturing was largely due to the co2 generated by respiration of the bacteria.
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2021-05-08
cell reports,2020,32(8):108060
2020年08月25日
pathogen entry into host tissues is a critical and first step in infections. in plants, the lateral roots (lrs) are a potential entry and colonization site for pathogens. here, using a gfp-labeled pathogenic bacterium pseudomonas syringae pv. tomato strain dc3000 (pto dc3000), we observe that virulent pto dc3000 invades plants through emerged lrs in arabidopsis. pto dc3000 strongly induced lr formation, a process that was dependent on the auxin response factor7 (arf7)/arf19-lateral organ boundaries-domain (lbd) regulatory module. we show that salicylic acid (sa) represses lr formation, and several mutants defective in sa signaling are also involved in pto dc3000-induced lr development. significantly, arf7, a well-documented positive regulator of lr development, directly represses the transcription of pr1 and pr2 to promote lr development. this study indicates that arf7-mediated auxin signaling antagonizes with sa signaling to control bacterial infection through the regulation of lr development.
bacterial infection lateral root auxin sa pto dc3000 arf7 pr1 pr2
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2021-05-08
jipb,2020,63(4):662-678
2020年08月13日
pre‐mrna (messenger rna) splicing participates in the regulation of numerous biological processes in plants. for example, alternative splicing shapes transcriptomic responses to abiotic and biotic stress, and controls developmental programs. however, no study has revealed a role for splicing in maintaining the root stem cell niche. here, a screen for defects in root growth in arabidopsis thaliana identified an ethyl methane sulfonate mutant defective in pre‐mrna splicing (rdm16‐4). the rdm16‐4 mutant displays a short‐root phenotype resulting from fewer cells in the root apical meristem. the plethora1 (plt1) and plt2 transcription factor genes are important for root development and were alternatively spliced in rdm16‐4 mutants, resulting in a disordered root stem cell niche and retarded root growth. the root cap of rdm16‐4 contained reduced levels of cytokinins, which promote differentiation in the developing root. this reduction was associated with the alternative splicing of genes encoding cytokinin signaling factors, such as arabidopsis histidine phosphotransfer protein5 and arabidopsis response regulators (arr1, arr2, and arr11). furthermore, expression of the full‐length coding sequence of arr1 or exogenous cytokinin application partially rescued the short‐root phenotype of rdm16‐4. this reveals that the rdm16‐mediated alternative splicing of cytokinin signaling components contributes to root growth.
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2021-05-08
trends in plant science,2020,25(11):1117-1130
2020年11月01日
salt stress is one of the major environmental stresses limiting plant growth and productivity. to adapt to salt stress, plants have developed various strategies to integrate exogenous salinity stress signals with endogenous developmental cues to optimize the balance of growth and stress responses. accumulating evidence indicates that phytohormones, besides controlling plant growth and development under normal conditions, also mediate various environmental stresses, including salt stress, and thus regulate plant growth adaptation. in this review, we mainly discuss and summarize how plant hormones mediate salinity signals to regulate plant growth adaptation. we also highlight how, in response to salt stress, plants build a defense system by orchestrating the synthesis, signaling, and metabolism of various hormones via multiple crosstalks.
salt stress plant hormones crosstalk among hormones plant growth salt adaptation
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2021-05-08
nature nanotechnology ,2020,15():755–760
2020年06月22日
although the fates of microplastics (0.1–5 mm in size) and nanoplastics (<100 nm) in marine environments are being increasingly well studied1,2, little is known about the behaviour of nanoplastics in terrestrial environments3,4,5,6, especially agricultural soils7. previous studies have evaluated the consequences of nanoplastic accumulation in aquatic plants, but there is no direct evidence for the internalization of nanoplastics in terrestrial plants. here, we show that both positively and negatively charged nanoplastics can accumulate in arabidopsis thaliana. the aggregation promoted by the growth medium and root exudates limited the uptake of amino-modified polystyrene nanoplastics with positive surface charges. thus, positively charged nanoplastics accumulated at relatively low levels in the root tips, but these nanoplastics induced a higher accumulation of reactive oxygen species and inhibited plant growth and seedling development more strongly than negatively charged sulfonic-acid-modified nanoplastics. by contrast, the negatively charged nanoplastics were observed frequently in the apoplast and xylem. our findings provide direct evidence that nanoplastics can accumulate in plants, depending on their surface charge. plant accumulation of nanoplastics can have both direct ecological effects and implications for agricultural sustainability and food safety.
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2021-05-08
new phytol.,2020,228(2):609-621
2020年06月10日
shade avoidance syndrome (sas) arises in densely growing plants that compete for light. in arabidopsis thaliana, phytochrome interacting factor (pif) proteins link the perception of shade to stem elongation via auxin production. here, we report that pifs inhibit the shade‐induced expression of auxin response factor 18 (arf18), and arf18 represses auxin signaling. therefore, pif‐mediated inhibition of arf18 enhances auxin‐dependent hypocotyl elongation in simulated shade. furthermore, we show that both pifs and arf18 directly repress qua‐quine starch (qqs), which controls the allocation of carbon and nitrogen. shade‐repressed qqs attenuates the conversion of starch to protein and thus reduced leaf area. our results suggest that pif‐dependent gene regulation coordinates multiple sas responses, including altered stem growth via arf18, as well as altered leaf growth and metabolism via qqs.
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2021-05-08
int. j. mol. sci. ,2020,21(11):4080
2020年06月07日
aluminum (al) stress is a major limiting factor for plant growth and crop production in acid soils. at present, only a few transcription factors involved in the regulation of al resistance have been characterized. here, we used reversed genetic approach through phenotype analysis of overexpressors and mutants to demonstrate that athb7 and athb12, two hd-zip i transcription factors, participate in al resistance. in response to al stress, athb7 and athb12 displayed different dynamic expression patterns. although both athb7 and athb12 positively regulate root growth in the absence of al stress, our results showed that athb7 antagonizes with athb12 to control root growth in response to al stress. the athb7/12 double mutant displayed a wild-type phenotype under al stress. consistently, our physiological analysis showed that athb7 and athb12 oppositely regulate the capacity of cell wall to bind al. yeast two hybrid assays showed that athb7 and athb12 could form homo-dimers and hetero-dimers in vitro, suggesting the interaction between athb7 and athb12 in the regulation of root growth. the conclusion was that athb7 and athb12 oppositely regulate al resistance by affecting al accumulation in root cell wall.
root, aluminum stress, athb7/, 12, yeast two hybrid, hd-zip i transcription factors
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2021-05-08
embo rep,2020,21(6):e50164
2020年06月04日
potassium (k) is essential for plant growth and development. here, we show that the kup/hak/kt k transporter kup9 controls primary root growth in arabidopsis thaliana. under low‐k conditions, kup9 mutants displayed a short‐root phenotype that resulted from reduced numbers of root cells. kup9 was highly expressed in roots and specifically expressed in quiescent center (qc) cells in root tips. the qc acts to maintain root meristem activity, and low‐k conditions induced qc cell division in kup9 mutants, resulting in impaired root meristem activity. the short‐root phenotype and enhanced qc cell division in kup9 mutants could be rescued by exogenous auxin treatment or by specifically increasing auxin levels in qc cells, suggesting that kup9 affects auxin homeostasis in qc cells. further studies showed that kup9 mainly localized to the endoplasmic reticulum (er), where it mediated k and auxin efflux from the er lumen to the cytoplasm in qc cells under low‐k conditions. these results demonstrate that kup9 maintains arabidopsis root meristem activity and root growth by regulating k and auxin homeostasis in response to low‐k stress.
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2021-05-08
pnas,2020,117(12):6910-6917
2020年03月24日
auxin is a class of plant hormone that plays a crucial role in the life cycle of plants, particularly in the growth response of plants to ever-changing environments. since the auxin responses are concentration-dependent and higher auxin concentrations might often be inhibitory, the optimal endogenous auxin level must be closely controlled. however, the underlying mechanism governing auxin homeostasis remains largely unknown. in this study, a udp-glycosyltransferase (ugt76f1) was identified from arabidopsis thaliana, which participates in the regulation of auxin homeostasis by glucosylation of indole-3-pyruvic acid (ipya), a major precursor of the auxin indole-3-acetic acid (iaa) biosynthesis, in the formation of ipya glucose conjugates (ipya-glc). in addition, ugt76f1 was found to mediate hypocotyl growth by modulating active auxin levels in a light- and temperature-dependent manner. moreover, the transcription of ugt76f1 was demonstrated to be directly and negatively regulated by pif4, which is a key integrator of both light and temperature signaling pathways. this study sheds a light on the trade-off between iaa biosynthesis and ipya-glc formation in controlling auxin levels and reveals a regulatory mechanism for plant growth adaptation to environmental changes through glucosylation of ipya.
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2021-05-08
plos genet,2020,16(2): e1008044
2020年02月07日
the development of lateral roots in arabidopsis thaliana is strongly dependent on signaling directed by the auxin response factor7 (arf7), which in turn activates lateral organ boundaries domain (lbd) transcription factors (lbd16, lbd18 and lbd29). here, the product of prh1, a pr-1 homolog annotated previously as encoding a pathogen-responsive protein, was identified as a target of arf7-mediated auxin signaling and also as participating in the development of lateral roots. prh1 was shown to be strongly induced by auxin treatment, and plants lacking a functional copy of prh1 formed fewer lateral roots. the transcription of prh1 was controlled by the binding of both arf7 and lbds to its promoter region.
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