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学者姓名：李迎
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Abstract ：
Abscisic acid (ABA) is a critical hormone for plant survival upon water stress. In this study, a large-scale mutants of Arabidopsis ecotype Columbia-0 (Col-0) by ethyl methanesulfonate (EMS)-mutagenesis were generated, and an improved root elongation under water-stress 1 (irew1) mutant showing significantly enhanced root growth was isolated upon a water potential gradient assay. Then, irew1 and ABA-related mutants in Arabidopsis or tomato plants were observed under water potential gradient assay or water-deficient condition. ABA pathway, Ca2+ response and primary root (PR) elongation rate were monitored in addition to DNA- and RNA-Seq analyses. We found that based on phenotyping and transcriptional analyses, irew1 exhibited the enhanced PR growth, ABA and Ca2+ responses compared to wild-type subjected to water stress. Interestingly, exogenous Ca2+ application enhanced PR growth of irew1, ABA-biosynthesis deficient mutants in Arabidopsis and tomato plants in response to water potential gradients or water-deficient condition. In combination with other ABA-related mutants and pharmacological study, our results suggest that ABA is required for root elongation associated with Ca2+ influx in response to water stress.
Keyword ：
Abscisic acid Abscisic acid Arabidopsis thaliana Arabidopsis thaliana Calcium Calcium Root Root Tomato Tomato Water stress Water stress
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| GB/T 7714 | Yuan, Wei , Zhang, Qian , Li, Ying et al. Abscisic acid is required for root elongation associated with Ca2+ influx in response to water stress [J]. | PLANT PHYSIOLOGY AND BIOCHEMISTRY , 2021 , 169 : 127-137 . |
| MLA | Yuan, Wei et al. "Abscisic acid is required for root elongation associated with Ca2+ influx in response to water stress" . | PLANT PHYSIOLOGY AND BIOCHEMISTRY 169 (2021) : 127-137 . |
| APA | Yuan, Wei , Zhang, Qian , Li, Ying , Wang, Qianwen , Xu, Feiyun , Dang, Xiaolin et al. Abscisic acid is required for root elongation associated with Ca2+ influx in response to water stress . | PLANT PHYSIOLOGY AND BIOCHEMISTRY , 2021 , 169 , 127-137 . |
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The hab1-1abi1-2abi2-2pp2ca-1 quadruple mutant (Qabi2-2) seedlings lacking key negative regulators of ABA signaling, namely, clade A protein phosphatases type 2C (PP2Cs), show more apoplastic H+ efflux in roots and display an enhanced root growth under normal medium or water stress medium compared to the wild type. The presence of low ABA concentration (0.1 micromolar), inhibiting PP2C activity via monomeric ABA receptors, enhances root apoplastic H+ efflux and growth of the wild type, resembling the Qabi2-2 phenotype in normal medium. Qabi2-2 seedlings also demonstrate increased hydrotropism compared to the wild type in obliquely-oriented hydrotropic experimental system, and asymmetric H+ efflux in root elongation zone is crucial for root hydrotropism. Moreover, we reveal that Arabidopsis ABA-insensitive 1, a key PP2C in ABA signaling, interacts directly with the C terminus of Arabidopsis plasma membrane H+-dependent adenosine triphosphatase 2 (AHA2) and dephosphorylates its penultimate threonine residue (Thr(947)), whose dephosphorylation negatively regulates AHA2.
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| GB/T 7714 | Miao, Rui , Yuan, Wei , Wang, Yue et al. Low ABA concentration promotes root growth and hydrotropism through relief of ABA INSENSITIVE 1-mediated inhibition of plasma membrane H+-ATPase 2 [J]. | SCIENCE ADVANCES , 2021 , 7 (12) . |
| MLA | Miao, Rui et al. "Low ABA concentration promotes root growth and hydrotropism through relief of ABA INSENSITIVE 1-mediated inhibition of plasma membrane H+-ATPase 2" . | SCIENCE ADVANCES 7 . 12 (2021) . |
| APA | Miao, Rui , Yuan, Wei , Wang, Yue , Garcia-Maquilon, Irene , Dang, Xiaolin , Li, Ying et al. Low ABA concentration promotes root growth and hydrotropism through relief of ABA INSENSITIVE 1-mediated inhibition of plasma membrane H+-ATPase 2 . | SCIENCE ADVANCES , 2021 , 7 (12) . |
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Abstract ：
Abscisic acid (ABA) is a critical hormone for plant survival under water stress. In this study, large-scale mutants of the Arabidopsis ecotype Columbia-0 (Col-0) were generated by ethyl methanesulfonate (EMS)-mutagenesis, and an improved root elongation under water-stress 1 (irew1) mutant showing significantly enhanced root growth was isolated under a water potential gradient assay. Then, irew1 and ABA-related mutants in Arabidopsis or tomato plants were observed under water potential gradient assay or water-deficient conditions. ABA pathway, Ca2+ response, and primary root (PR) elongation rate were monitored in addition to DNA- and RNA-Seq analyses. We found that based on phenotyping and transcriptional analyses, irew1 exhibited enhanced PR growth, ABA, and Ca2+ responses, compared to wild type subjected to water stress. Interestingly, exogenous Ca2+ application enhanced PR growth of irew1, ABA-biosynthesis deficient mutants in Arabidopsis, and tomato plants, in response to water potential gradients or water-deficient conditions. In combination with other ABA-related mutants and pharmacological studies, our results suggest that ABA is required for root elongation associated with Ca2+ influx in response to water stress.
Keyword ：
abscisic acid abscisic acid Arabidopsis thaliana Arabidopsis thaliana calcium calcium root root tomato tomato water stress water stress
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| GB/T 7714 | Yuan, Wei , Zhang, Qian , Li, Ying et al. 被撤回的出版物: Abscisic Acid Is Required for Root Elongation Associated With Ca2+ Influx in Response to Water Stress (Retracted article. See vol. 12, 2021) [J]. | FRONTIERS IN PLANT SCIENCE , 2020 , 11 . |
| MLA | Yuan, Wei et al. "被撤回的出版物: Abscisic Acid Is Required for Root Elongation Associated With Ca2+ Influx in Response to Water Stress (Retracted article. See vol. 12, 2021)" . | FRONTIERS IN PLANT SCIENCE 11 (2020) . |
| APA | Yuan, Wei , Zhang, Qian , Li, Ying , Wang, Qianwen , Xu, Feiyun , Dang, Xiaolin et al. 被撤回的出版物: Abscisic Acid Is Required for Root Elongation Associated With Ca2+ Influx in Response to Water Stress (Retracted article. See vol. 12, 2021) . | FRONTIERS IN PLANT SCIENCE , 2020 , 11 . |
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The role of amyloplasts in the interactions between hydrotropism and gravitropism has been previously described. However, the effect of light-dark on the interactions between the two tropisms remains unclear. Here, by developing a method that makes it possible to mimic natural conditions more closely than the conventional lab conditions, we show that hydrotropism is higher in wild-type Arabidopsis seedlings whose shoots are illuminated but whose roots are grown in the dark compared with seedlings that are fully exposed to light. Root gravitropism is substantially decreased because of the reduction of amyloplast content in the root tip with decreased gene expression in PGM1 (a key starch biosynthesis gene), which may contribute to enhanced root hydrotropism under darkness. Furthermore, the starch-deficient mutant pgm1-1 exhibits greater hydrotropism compared with wild-type. Our results suggest that amyloplast response and starch reduction occur under light-dark modulation, followed by decreased gravitropism and enhanced hydrotropism in Arabidopsis root.
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| GB/T 7714 | Li, Ying , Yuan, Wei , Li, Luocheng et al. Light-Dark Modulates Root Hydrotropism Associated with Gravitropism by Involving Amyloplast Response in Arabidopsis [J]. | CELL REPORTS , 2020 , 32 (13) . |
| MLA | Li, Ying et al. "Light-Dark Modulates Root Hydrotropism Associated with Gravitropism by Involving Amyloplast Response in Arabidopsis" . | CELL REPORTS 32 . 13 (2020) . |
| APA | Li, Ying , Yuan, Wei , Li, Luocheng , Miao, Rui , Dai, Hui , Zhang, Jianhua et al. Light-Dark Modulates Root Hydrotropism Associated with Gravitropism by Involving Amyloplast Response in Arabidopsis . | CELL REPORTS , 2020 , 32 (13) . |
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White lupin (Lupinus albus) is a legume crop that develops cluster roots and has high phosphorus (P)-use efficiency (PUE) in low-P soils. Here, we assemble the genome of white lupin and find that it has evolved from a whole-genome triplication (WGT) event. We then decipher its diploid ancestral genome and reconstruct the three sub-genomes. Based on the results, we further reveal the sub-genome dominance and the genic expression of the different sub-genomes varying in relation to their transposable element (TE) density. The PUE genes in white lupin have been expanded through WGT as well as tandem and dispersed duplications. Furthermore, we characterize four main pathways for high PUE, which include carbon fixation, cluster root formation, soil-P remobilization, and cellular-P reuse. Among these, auxin modulation may be important for cluster root formation through involvement of potential genes LaABCG36s and LaABCG37s. These findings provide insights into the genome evolution and low-P adaptation of white lupin.
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| GB/T 7714 | Xu, Weifeng , Zhang, Qian , Yuan, Wei et al. The genome evolution and low-phosphorus adaptation in white lupin [J]. | NATURE COMMUNICATIONS , 2020 , 11 (1) . |
| MLA | Xu, Weifeng et al. "The genome evolution and low-phosphorus adaptation in white lupin" . | NATURE COMMUNICATIONS 11 . 1 (2020) . |
| APA | Xu, Weifeng , Zhang, Qian , Yuan, Wei , Xu, Feiyun , Aslam, Mehtab Muhammad , Miao, Rui et al. The genome evolution and low-phosphorus adaptation in white lupin . | NATURE COMMUNICATIONS , 2020 , 11 (1) . |
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Hydrotropism is the directed growth of roots toward the water found in the soil. However, mechanisms governing interactions between hydrotropism and gravitropism remain largely unclear. In this study, we found that an air system and an agar-sorbitol system induced only oblique water-potential gradients; an agar-glycerol system induced only vertical water-potential gradients; and a sand system established both oblique and vertical water-potential gradients. We employed obliquely oriented and vertically oriented experimental systems to study hydrotropism in Arabidopsis and tomato plants. Comparative analyses using different hydrotropic systems showed that gravity hindered the ability of roots to search for obliquely oriented water, whilst facilitating roots' search for vertically oriented water. We found that the gravitropism-deficient mutant aux1 showed enhanced hydrotropism in the oblique orientation but impaired root elongation towards water in the vertical orientation. The miz1 mutant exhibited deficient hydrotropism in the oblique orientation but normal root elongation towards water in the vertical orientation. Importantly, in contrast to miz1, the miz1/aux1 double mutant exhibited hydrotropic bending in the oblique orientation and attenuated root elongation towards water in the vertical orientation. Our results suggest that gravitropism is required for MIZ1-regulated root hydrotropism in both the oblique orientation and the vertical orientation, providing further insight into the role of gravity in root hydrotropism.
Keyword ：
Arabidopsis Arabidopsis gravitropism gravitropism hydrotropism hydrotropism MIZ1 MIZ1 root root water potential water potential
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| GB/T 7714 | Li, Ying , Yuan, Wei , Li, Luocheng et al. Comparative analysis reveals gravity is involved in the MIZ1-regulated root hydrotropism [J]. | JOURNAL OF EXPERIMENTAL BOTANY , 2020 , 71 (22) : 7316-7330 . |
| MLA | Li, Ying et al. "Comparative analysis reveals gravity is involved in the MIZ1-regulated root hydrotropism" . | JOURNAL OF EXPERIMENTAL BOTANY 71 . 22 (2020) : 7316-7330 . |
| APA | Li, Ying , Yuan, Wei , Li, Luocheng , Dai, Hui , Dang, Xiaolin , Miao, Rui et al. Comparative analysis reveals gravity is involved in the MIZ1-regulated root hydrotropism . | JOURNAL OF EXPERIMENTAL BOTANY , 2020 , 71 (22) , 7316-7330 . |
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Plant roots respond to soil moisture gradients and remodel their growth orientation toward water through hydrotropism, a process vital for acclimation to a changing soil environment. Mechanisms underlying the root hydrotropic response, however, remain poorly understood. Here, we examined hydrotropism in 31 Arabidopsis (Arabidopsis thaliana) ecotypes collected from different parts of the world and grown along moisture gradients in a specially designed soil-simulation system. Comparative transcriptome profiling and physiological analyses were carried out on three selected ecotypes, Wassilewskija (Ws), Columbia (Col-0) (strongly hydrotropic), Col-0 (moderately hydrotropic), and C24 (weakly hydrotropic), and in mutant lines with altered root hydrotropic responses. We show that H+ efflux, Ca2+ influx, redox homeostasis, epigenetic regulation, and phytohormone signaling may contribute to root hydrotropism. Among phytohormones, the role of brassinosteroids (BRs) was examined further. In the presence of an inhibitor of BR biosynthesis, the strong hydrotropic response observed in Ws was reduced. The root H+ efflux and primary root elongation also were inhibited when compared with C24, an ecotype that showed a weak hydrotropic response. The BR-insensitive mutant bri1-5 displayed higher rates of root growth inhibition and root curvature on moisture gradients in vertical or oblique orientation when compared with wild-type Ws. We also demonstrate that BRI1 (a BR receptor) interacts with AHA2 (a plasma membrane H+-ATPase) and that their expression patterns are highly coordinated. This synergistic action may contribute to the strong hydrotropism observed in Ws. Our results suggest that BR-associated H+ efflux is critical in the hydrotropic response of Arabidopsis roots.
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| GB/T 7714 | Miao, Rui , Wang, Meng , Yuan, Wei et al. Comparative Analysis of Arabidopsis Ecotypes Reveals a Role for Brassinosteroids in Root Hydrotropism [J]. | PLANT PHYSIOLOGY , 2018 , 176 (4) : 2720-2736 . |
| MLA | Miao, Rui et al. "Comparative Analysis of Arabidopsis Ecotypes Reveals a Role for Brassinosteroids in Root Hydrotropism" . | PLANT PHYSIOLOGY 176 . 4 (2018) : 2720-2736 . |
| APA | Miao, Rui , Wang, Meng , Yuan, Wei , Ren, Yan , Li, Ying , Zhang, Na et al. Comparative Analysis of Arabidopsis Ecotypes Reveals a Role for Brassinosteroids in Root Hydrotropism . | PLANT PHYSIOLOGY , 2018 , 176 (4) , 2720-2736 . |
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【目的】基于林地除草导致的草甘膦残留问题,通过杉木盆栽探究杉木对土壤残存草甘膦的形态学和生理学响应,分析土壤残存草甘膦对杉木养分吸收的影响机制,为林业生产中草甘膦的合理施用提供理论依据,为杉木人工林的可持续经营提供基础资料。【方法】参考土壤残存草甘膦含量在培养基质中添加不同浓度草甘膦(0、2、5、10、20、50 mg·kg^(-1)),通过盆栽试验,测定杉木对草甘膦的形态学和生理学响应,分析草甘膦对杉木养分吸收的影响机制。【结果】草甘膦对杉木幼苗的生长发育产生影响,在高浓度草甘膦处理下,杉木幼苗生物量增量显著低于对照,同时叶片出现黄化现象。不同浓度草甘膦处理下杉木幼苗叶片生理学指标表现为:随着草甘膦浓度增加,叶片相对电导率、MDA含量、SOD活性、POD活性、脯氨酸含量总体均呈上升趋势,可溶性蛋白呈下降趋势,叶绿素a、叶绿素b和叶绿素总量均先升后降,而莽草酸含量无显著变化。草甘膦对杉木根系和叶片元素的吸收和利用影响显著,随着草甘膦浓度增加,杉木幼苗根系Cu、Mg和Ca含量均呈上升趋势。杉木叶片Cu含量增加,Mn含量先上升后下降,Zn含量则呈先降后增。【结论】高浓度草甘膦对杉木生长有负面作用,造成杉木幼苗生理紊乱,引起其养分吸收失衡,最终导致杉木幼苗生长量和成活率降低,因此在林业除草过程中应合理控制草甘膦用量,且在抚育过程中喷施草甘膦应远离杉木根系,以减少根系对草甘膦的吸收,降低其不利影响。
Keyword ：
养分吸收 养分吸收 杉木 杉木 生理响应 生理响应 草甘膦 草甘膦
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| GB/T 7714 | Zhou, Chuifan , Lin, Jingwen , Li, Ying et al. 土壤残存草甘膦对杉木幼苗生理及养分吸收的影响 [J]. | 林业科学 , 2017 , 53 (4) : 56-64 . |
| MLA | Zhou, Chuifan et al. "土壤残存草甘膦对杉木幼苗生理及养分吸收的影响" . | 林业科学 53 . 4 (2017) : 56-64 . |
| APA | Zhou, Chuifan , Lin, Jingwen , Li, Ying , Liu, Aiqin . 土壤残存草甘膦对杉木幼苗生理及养分吸收的影响 . | 林业科学 , 2017 , 53 (4) , 56-64 . |
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本文在分析新形势下高校思想政治教育工作面临的主要问题基础上,提出坚定不移将"两课"作为思想政治教育主阵地、提高"两课"学习的实效性、创新网络思想政治教育途径、以学生为本,转变教育工作思路四个措施以加强和改进高校思想政治教育工作。
Keyword ：
大学生 大学生 思想政治教育 思想政治教育 新形势 新形势
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| GB/T 7714 | 李迎 . 新形势下加强高校思想政治教育工作的思考 [J]. | 湖北函授大学学报 , 2011 , 24 (12) : 62-63 . |
| MLA | 李迎 . "新形势下加强高校思想政治教育工作的思考" . | 湖北函授大学学报 24 . 12 (2011) : 62-63 . |
| APA | 李迎 . 新形势下加强高校思想政治教育工作的思考 . | 湖北函授大学学报 , 2011 , 24 (12) , 62-63 . |
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本文以园林专业为例,对学生就业难的问题进行分析并提出相应的建议,为缓和"供无法应求"的矛盾,有效解决毕业生就业问题,提升毕业生就业水平提供了有益参考。
Keyword ：
园林专业 园林专业 大学生就业 大学生就业 实践性学科 实践性学科
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| GB/T 7714 | 李迎 , 李佳曦 . 实践性学科的就业现状思考与建议——以园林专业为例 [J]. | 佳木斯教育学院学报 , 2011 , (07) : 7-8 . |
| MLA | 李迎 et al. "实践性学科的就业现状思考与建议——以园林专业为例" . | 佳木斯教育学院学报 07 (2011) : 7-8 . |
| APA | 李迎 , 李佳曦 . 实践性学科的就业现状思考与建议——以园林专业为例 . | 佳木斯教育学院学报 , 2011 , (07) , 7-8 . |
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